🔍 TEE-TA 脆弱性解析レポート

プロジェクト: optee-pkcs11-cve | 生成日時: 2026年02月21日 16:34:43

解析モード: Hybrid (DITING rules) | LLMプロバイダー: unknown

📊 解析サマリー

解析チェーン数
237
ユニークチェーン
237
検出脆弱性
18
Inline Findings
283
解析関数数
237
LLM呼び出し
917
キャッシュヒット率
0%
キャッシュ再利用
0

解析日時: 2026-02-21 16:34:43

⏱️ 実行タイムライン

フェーズ3: シンク特定 395.02秒
フェーズ5: テイント解析 25686.41秒
合計実行時間: 26081.43秒 (434.7分)

🎯 特定されたシンク関数

解析時間: 6.58分 | 解析関数数: 102 | 特定シンク数: 30

TEE_CreatePersistentObject

判定: UNKNOWN

パラメータインデックス: 1

source bytes written to persistent object

TEE_CreatePersistentObject

判定: UNKNOWN

パラメータインデックス: 2

size of data written to storage

TEE_GenerateRandom

判定: UNKNOWN

パラメータインデックス: 0

writes generated bytes into provided buffer

TEE_GenerateRandom

判定: UNKNOWN

パラメータインデックス: 1

specifies number of bytes to write

TEE_GetObjectBufferAttribute

判定: UNKNOWN

パラメータインデックス: 0

copies object attribute bytes into caller buffer

TEE_GetObjectBufferAttribute

判定: UNKNOWN

パラメータインデックス: 2

size/length of destination buffer

TEE_GetObjectInfo1

判定: UNKNOWN

パラメータインデックス: 1

writes TEE_ObjectInfo into caller buffer

TEE_GetPropertyAsUUID

判定: UNKNOWN

パラメータインデックス: 2

writes UUID struct (16 bytes) into caller-supplied pointer

TEE_MemFill

判定: UNKNOWN

パラメータインデックス: 0

destination buffer written with pattern

TEE_MemFill

判定: UNKNOWN

パラメータインデックス: 2

number of bytes to write (write extent)

TEE_MemMove

判定: UNKNOWN

パラメータインデックス: 0

destination buffer receiving copied bytes

TEE_MemMove

判定: UNKNOWN

パラメータインデックス: 2

number of bytes copied (controls write extent)

TEE_ReadObjectData

判定: UNKNOWN

パラメータインデックス: 1

writes object bytes into caller buffer

TEE_ReadObjectData

判定: UNKNOWN

パラメータインデックス: 2

controls number of bytes written

TEE_TruncateObjectData

判定: UNKNOWN

パラメータインデックス: 1

Size parameter controls persisted object truncation length

TEE_WriteObjectData

判定: UNKNOWN

パラメータインデックス: 1

source buffer written to persistent object

TEE_WriteObjectData

判定: UNKNOWN

パラメータインデックス: 2

length controls number of bytes written

mbedtls_asn1_write_octet_string

判定: UNKNOWN

パラメータインデックス: 0

writes ASN.1 octet bytes into provided output buffer

mbedtls_ecp_point_write_binary

判定: UNKNOWN

パラメータインデックス: 4

writes point bytes into provided buffer

mbedtls_ecp_point_write_binary

判定: UNKNOWN

パラメータインデックス: 5

buffer length bounds for the write

mbedtls_mpi_write_binary

判定: UNKNOWN

パラメータインデックス: 1

writes MPI bytes into provided buffer

mbedtls_mpi_write_binary

判定: UNKNOWN

パラメータインデックス: 2

buffer length bounds the write

mbedtls_pk_write_key_der

判定: UNKNOWN

パラメータインデックス: 1

writes DER bytes into provided buffer

mbedtls_pk_write_key_der

判定: UNKNOWN

パラメータインデックス: 2

buffer length limits written bytes

memset

判定: UNKNOWN

パラメータインデックス: 0

writes pattern into destination buffer

memset

判定: UNKNOWN

パラメータインデックス: 2

controls number of bytes written

snprintf

判定: UNKNOWN

パラメータインデックス: 0

writes formatted output into provided destination buffer

snprintf

判定: UNKNOWN

パラメータインデックス: 1

limits characters written; attacker-influenced format can control length usage

snprintk

判定: UNKNOWN

パラメータインデックス: 0

format output buffer (printf-like)

snprintk

判定: UNKNOWN

パラメータインデックス: 1

buffer size limit for formatted write

🔍 検出された脆弱性

脆弱性 #1: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75

タイプ: weak_input_validation / CWE-20/CWE-125

説明: Reads pkcs11 header via memmove without ensuring sufficient remaining bytes (end - cur >= sizeof(header)). / 判定理由: Memory-safety issues are primary: attacker-controlled sizes are used without adequate bounds, enabling OOB reads/writes at the TEE_MemMove call sites; these are clear code-level weaknesses with direct data/control flow from REE-provided templates.

脆弱性 #2: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84

タイプ: weak_input_validation / CWE-20/CWE-125

説明: Uses pkcs11_ref.size-derived next_off to compute in-place memmove length without validating next_off or ensuring bounds, allowing OOB memory operations. / 判定理由: Memory-safety issues are primary: attacker-controlled sizes are used without adequate bounds, enabling OOB reads/writes at the TEE_MemMove call sites; these are clear code-level weaknesses with direct data/control flow from REE-provided templates.

脆弱性 #3: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_wrap_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

タイプ: weak_input_validation / CWE-125

説明: Reads pkcs11_attribute_head from cur using TEE_MemMove without ensuring the full header fits before the end of attributes region. / 判定理由: Memory-safety precedence: an unchecked TEE_MemMove reading a fixed struct from a serialized region without verifying full struct fits within bounds constitutes a weak-input-validation flaw (CWE-125); existing loop condition is insufficient.

脆弱性 #4: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_certificate -> get_attribute -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

タイプ: weak_input_validation / CWE-120

説明: TEE_MemMove(attr, attr_ptr, size) can copy more bytes than destination 'attr' when attr_size is NULL or not validated against 'size'. / 判定理由: The sink performs an unconditional copy of 'size' bytes when attr is non-NULL; although a bounds-check exists when attr_size is provided, callers may pass NULL attr_size or mismatched sizes making the check ineffective—this is a weak input validation that can lead to overflow/overread.

脆弱性 #5: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> modify_attributes_list -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220

タイプ: weak_input_validation / CWE-20

説明: Copies sizeof(cli_head) from cur without verifying remaining bytes (end - cur) >= sizeof(cli_head); cli_head.size then used to compute len affecting loop bounds. / 判定理由: The copy reads a fixed-size header from a buffer whose remaining size isn't checked before the copy and then uses the parsed size to advance the pointer; this is a classic weak-input-validation leading to possible out-of-bounds reads and malformed length-driven loop behavior.

脆弱性 #6: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_wrap_key -> attributes_match_reference -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265

タイプ: weak_input_validation / CWE-125

説明: Unconditional TEE_MemMove of sizeof(pkcs11_ref) from ref_attr without verifying ref buffer has sufficient bytes / 判定理由: Memory-safety issue: an unconditional fixed-size read from a caller-provided blob without verifying remaining bytes creates an out-of-bounds read (CWE-125); this takes precedence over information-disclosure classification.

脆弱性 #7: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832

タイプ: weak_input_validation / CWE-125

説明: Reads sizeof(cli_head) from cli_ref without ensuring remaining src bytes >= sizeof(cli_head). / 判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

脆弱性 #8: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:839

タイプ: weak_input_validation / CWE-125

説明: Writes cli_head.size into cli_ref->size inside template without proving dst has space. / 判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

脆弱性 #9: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:854

タイプ: weak_input_validation / CWE-125

説明: Writes cli_head.size into cli_ref->size inside template without proving dst has space. / 判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

脆弱性 #10: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:886

タイプ: weak_input_validation / CWE-125

説明: Copies cli_head.size back into template slot; template bounds at this point are not re-checked. / 判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

脆弱性 #11: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:910

タイプ: weak_input_validation / CWE-125

説明: Copies template into out->memref.buffer using out->memref.size without ensuring out->memref.size <= template actual size. / 判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

脆弱性 #12: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> unregister_persistent_object -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

タイプ: weak_input_validation / CWE-119

説明: TEE_MemMove copies count * sizeof(TEE_UUID) where count = ptr->count - idx; idx/count arithmetic may be inconsistent leading to out-of-bounds copy. / 判定理由: The memmove at line 395 uses a runtime-derived 'count' as the copy length with only indirect validation (idx from helper and earlier allocation). This reliance on upstream correctness without an explicit local bounds check creates a plausible out-of-bounds write condition, so classify as weak_input_validation vulnerability with medium confidence.

脆弱性 #13: TEE_WriteObjectData

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> update_persistent_object_attributes -> TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563

タイプ: weak_input_validation / CWE-20

説明: size computed from obj->attributes->attrs_size is used unchecked as write length to persistent storage / 判定理由: Direct use of a size derived from upstream (potentially REE-controlled) attribute length without a validating bounds check before TEE_WriteObjectData constitutes weak input validation and a memory-safety risk; destination is TEE persistent storage (not REE), so information-disclosure promotion does not apply.

脆弱性 #14: TEE_TruncateObjectData

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> update_persistent_object_attributes -> TEE_TruncateObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:567

タイプ: weak_input_validation / CWE-20

説明: size computed from obj->attributes->attrs_size (sourced from caller template) is used to truncate persistent object without validation. / 判定理由: Tainted length/size derived from caller data reaches a critical filesystem/persistent-object truncation API without validation; this meets memory-safety / weak input validation criteria and is plausibly exploitable.

脆弱性 #15: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380

タイプ: weak_input_validation / CWE-125

説明: Reads sizeof(cli_ref) from cur (derived from REE head) without proving the header fits inside end; cli_ref.size then used to compute len enabling further OOB. / 判定理由: Memory-safety concern: a read of sizeof(cli_ref) is performed from a cursor derived from untrusted head->attrs_size without an explicit bounds check ensuring the header fits; this yields a clear out-of-bounds/len-arithmetic risk.

脆弱性 #16: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_ck_token_mecha_ids -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488

タイプ: weak_input_validation / CWE-125

説明: TEE_MemMove copies out->memref.size bytes where out->memref.size is derived from REE and may exceed the actual allocated source buffer (array). / 判定理由: The copy length is attacker-controlled and upstream logic can produce a mismatch between the allocated src size and the requested copy length; sanitization is present but relies on interactions with allocation behavior (unknown), so a weakness in input validation remains.

脆弱性 #17: TEE_MemMove

MEDIUM

チェーン: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

タイプ: weak_input_validation / CWE-20

説明: TEE_MemMove(out, src, size) copies potentially attacker-controlled 'size' bytes from REE-derived src into TA memory without local validation. / 判定理由: The copy reads from REE-derived memory into TA memory using a caller-supplied size without visible, sufficient validation at this program point, creating a realistic memory-safety risk (weak input validation).

脆弱性 #18: TEE_MemMove

HIGH

チェーン: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_alloc_get_one_attribute -> alloc_and_get -> TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67

タイプ: weak_input_validation / CWE-125

説明: Copies 'size' bytes from REE-derived src into allocated buffer without semantic limits on 'size'; size originates from parsed head.size. / 判定理由: The copy at line 67 uses an attacker-controllable 'size' parsed from REE data; while integer overflow is checked, there is no explicit semantic bounds validation of 'size' against expected attribute limits, producing a plausible memory-safety vulnerability (over-read/overflow) at the copy site.

📋 Inline Findings (詳細な検出情報)

other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/alloc_key_data_to_wrap (call-site):2777

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' parameter aliases key->attributes (TA-private object attributes containing private key parts).", "Call-site binding: 'data' parameter is &key_data (TA-private out pointer) provided by caller.", "Call-site binding: 'sz' parameter is &key_sz (TA-private size out parameter) from caller."]

ルール: other

['rc = encode_rsa_private_key_der(head, data, sz);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34

フェーズ: ['unknown']

詳細: ['computes buf_len from (*head)->attrs_size and then serializes into buffer without explicit capacity check of destination, relying on serialize to enforce bounds', 'Computes buf_len from (*head)->attrs_size and serializes into buffer without an explicit capacity check local to caller; relies on serialize to enforce safety.']

ルール: weak_input_validation

['buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; ... rc = serialize(bstart, &buf_len, data, size);']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:54

フェーズ: ['unknown']

詳細: ['updates (*head)->attrs_size by adding user-controlled size without additional validation; may corrupt internal bookkeeping if size is tainted']

ルール: other

['(*head)->attrs_size += 2 * sizeof(uint32_t) + size;']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55

フェーズ: ['unknown']

詳細: ['Updates (*head)->attrs_size by adding size; untrusted size can cause overflow or incorrect size accounting if not validated']

ルール: weak_input_validation

['(*head)->attrs_size += 2 * sizeof(uint32_t) + size;']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72

フェーズ: ['unknown']

詳細: ['Loop bound uses h->attrs_size derived from head; if attrs_size is corrupted by input, loop may OOB or mis-parse entries']

ルール: weak_input_validation

['for (; cur < end; cur += next_off) {']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75

フェーズ: ['unknown']

詳細: ["Binding: destination &pkcs11_ref is local (TEE-private) while source 'cur' derives from *head memory whose provenance is caller-controlled/unknown", 'Reads attribute header from cur via TEE_MemMove into local pkcs11_ref; source (cur) may be in REE-derived buffer', 'Reads attribute header from cur (possibly REE-derived) into local pkcs11_ref via TEE_MemMove; source provenance uncertain', 'Fixed-size header read from REE-derived region without explicit check that remaining bytes >= header size.', 'Reads attribute header from cur into local pkcs11_ref using TEE_MemMove where pkcs11_ref.size is later used to compute next_off; size originates from memory and is only implicitly bounded by end', 'Reads attribute header from untrusted memory into local pkcs11_ref via TEE_MemMove; pkcs11_ref.size then controls subsequent offsets without strong bounds before use', 'Binding: destination &pkcs11_ref originates as callee-local (TEE-private) while source cur is buffer derived from head; record aliasing of pointers at call-site', 'Reading pkcs11_ref from attrs buffer where pkcs11_ref.size influences offsets without explicit bounds validation.', 'Reads attribute header from untrusted blob (cur) to compute next_off and then uses it to bound memmove without verifying next_off fits within remaining attrs; attacker-controlled size can cause out-of-bounds behavior.', 'dst (&pkcs11_ref) is a local TA buffer while src (cur) points into obj_attrs blob derived from caller; binding of callee params to their origins.', 'Reading attribute header from untrusted blob without checking header fits within remaining attrs_size.', 'Copies attribute header from parsed buffer into local pkcs11_ref; source buffer provenance unclear (could be REE-origin), sizes derived from parsed data', 'parses pkcs11_ref.size from in-memory data and uses it to compute next_off and loop bounds without strong validation against h->attrs_size', 'copies header at cur into local pkcs11_ref using size derived from in-memory data; parsed size later used to compute offsets without stronger validation', 'Copies attribute header from cur without verifying there are sizeof(pkcs11_ref) bytes remaining; header.size is then trusted', "Binding: destination '&pkcs11_ref' is a local TA stack object (TA-private) at call site", "Copies header from 'cur' without first confirming sizeof(header) bytes remain; header.size then influences parsing", 'Uses pkcs11_ref.size read from buffer at cur to compute next_off and as a memmove length without validating it against attrs_size, enabling out-of-bounds/mis-sized moves', 'dest (&pkcs11_ref) is TA-local but src (cur) may be REE-derived buffer; binding of destination to caller origin recorded']

ルール: other, weak_input_validation

['TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));', 'TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;', 'TEE_MemMove(cur, cur + next_off, end - (cur + next_off));']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84

フェーズ: ['unknown']

詳細: ['Uses pkcs11_ref.size (derived from memory within h, potentially attacker-controlled) to compute next_off and perform an in-place TEE_MemMove without an explicit upper bound on next_off', 'Uses pkcs11_ref.size-derived next_off to compute an in-place memmove length (end - (cur + next_off)) without an explicit upper bound on pkcs11_ref.size', 'In-place memmove shifts trailing attributes within head buffer (cur <- cur+next_off) where buffer may be REE-visible and next_off is derived from REE-controlled size field without independent bounds validation', 'In-place shift of trailing attributes (cur <- cur+next_off) uses next_off derived from REE-controlled size field without an independent bound check', 'In-place shift within REE-visible buffer uses next_off derived from REE-controlled pkcs11_ref.size without independent validation, enabling overwrite.', 'Shifts tail data left with TEE_MemMove(cur, cur + next_off, end - (cur + next_off)) using next_off derived from untrusted attribute size; may under/overlap and affects attrs_size/count', 'Shifts tail data left using length computed from next_off derived from untrusted attribute size; overlapping move within same buffer may be unsafe if sizes are malicious', 'Binding: dest cur and src cur+next_off are pointers into the same attrs buffer (aliasing); length depends on untrusted header-derived next_off', 'Tail data moved using next_off derived from untrusted header, enabling overlapping/unsafe moves and attrs_size/count modifications.', 'In-place memmove shifts remaining attributes using attacker-influenced next_off derived from pkcs11_ref.size; insufficient explicit bounds/sanity checks on pkcs11_ref.size.', 'Copies remainder of attribute list using next_off computed from untrusted pkcs11_ref.size without strong sanity checks; len expression may be attacker-controlled causing OOB or logic errors.', 'In-place shift of attribute bytes uses next_off from untrusted header without sufficient validation, risking OOB.', 'in-place TEE_MemMove shifts remaining attributes using sizes derived from parsed pkcs11_ref and h->attrs_size; malformed sizes could cause incorrect memory shifts', 'In-place shift of trailing attributes using length computed from parsed headers; malformed pkcs11_ref.size or attrs_size may cause incorrect move', 'In-place attribute shifting uses unvalidated next_off derived from pkcs11_ref.size; malformed sizes can cause incorrect memory moves.', 'in-place TEE_MemMove moves memory region (cur + next_off) to cur using length derived from end - (cur + next_off); if sizes miscomputed this can corrupt attribute list', 'in-place memmove shifts trailing bytes using length computed from end and next_off; miscomputed next_off can corrupt list (overlap/misbound copy)', 'Uses pkcs11_ref.size (from unvalidated header) to compute next_off and to memmove remaining bytes, enabling OOB reads/writes if header is malicious', "Binding: dest 'cur' and src 'cur + next_off' are pointers into the same attributes buffer (TA-private)", 'Moves remaining bytes based on next_off computed from untrusted header size; may underflow/overflow if header is malicious', 'memmove uses len computed from pkcs11_ref.size without prior robust validation against attrs_size, allowing out-of-bounds move']

ルール: weak_input_validation, shared_memory_overwrite, other

['TEE_MemMove(cur, cur + next_off, end - (cur + next_off));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'head' aliases caller-provided obj_attrs (TA-private attribute blob).", "Call-site binding: 'head' aliases callers' object attribute container (object state) and is used for internal parsing.", "Binding: 'head' originates from caller attributes container (may embed REE-derived template); used for pointer arithmetic to compute cur/end.", "alias of caller-provided 'head' passed into function; head typically originates from REE-derived template in higher-level callers", "Call-site binding: 'head' aliases caller-provided attributes structure which may be REE-originated or TA-private depending on caller"]

ルール: other

['char *cur = (char *)head + sizeof(struct obj_attrs);', 'void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute, void **attr, uint32_t *attr_size, size_t *count)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'count' is used as input max_found and updated with number of matches found (caller-provided control value).", "Binding: 'count' is input/output controlling max_found and updated to actual found count; caller-provided value drives loop termination and outputs.", "Call-site binding: '*count' used as max_found; caller-provided count influences loop's early exit"]

ルール: other

['size_t max_found = *count; ... *count = found;', 'size_t max_found = *count;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:112

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'attr' (attr_ptr) is an out-parameter that will be filled with pointers into TA-private storage.", "Binding: 'attr' is caller-supplied out-pointer array; pointers stored point into template region (cur + sizeof(pkcs11_ref)).", 'attr (out pointer) is alias-bound to caller storage; caller may supply TA or REE memory so origin is unknown', "Call-site binding: 'attr' output pointer is caller-supplied (may be NULL or point into caller stack/vars)"]

ルール: other

['if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }', 'void **attr_ptr = attr;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:113

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'attr_size' is updated with attribute sizes (TA-private metadata written out).", "Binding: 'attr_size' is caller-provided size array; receives pkcs11_ref.size values which influence upstream buffer checks.", 'attr_size (out pointer) is alias-bound to caller storage; sizes written derive from parsed pkcs11_ref.size which may be attacker-controlled if head is REE-derived', "Call-site binding: 'attr_size' output pointer is caller-supplied (may be NULL or point into caller memory)"]

ルール: other

['if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;', 'uint32_t *attr_size_ptr = attr_size;']
weak_input_validation MEDIUM

関数: ['unknown', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115

フェーズ: ['unknown']

詳細: ["Loop advances by next_off derived from pkcs11_ref.size read from data in 'head' without validating next_off before use; malformed attrs_size or pkcs11_ref.size can cause logic errors or overrun.", 'Loop advances by next_off computed from pkcs11_ref.size read from unvalidated data; malformed sizes can cause overruns or infinite loops.', 'pkcs11_ref.size (from unvalidated template bytes) is used to compute next_off and advance cur without an upper bound check, enabling out-of-bounds next_off', 'Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size where pkcs11_ref.size is from untrusted bytes and not upper-bounded, enabling out-of-bounds advancement.', 'Reads attribute headers and uses pkcs11_ref.size to advance cur (next_off) without explicit check that cur+sizeof(pkcs11_ref) and cur+next_off are within bounds before the TEE_MemMove, risking out-of-bounds read if attrs_size is inconsistent.', 'Reads attribute header and uses header.size to advance without explicit pre-read bounds check; can cause out-of-bounds read.', 'Parses length-prefixed attributes using pkcs11_ref.size from buffer; if pkcs11_ref.size is attacker-controlled it may cause next_off or cur arithmetic to overflow/skip checks leading to panic/out-of-bounds', 'Loop computes next_off from pkcs11_ref.size (attacker-controlled) to advance cur; without robust range checks this can lead to mis-parsing, over-reads, or infinite loops.', 'loop advances by next_off derived from pkcs11_ref.size (input-controlled) without per-iteration validation against end until final check, enabling crafted attrs_size/size to cause mis-iteration', 'Loop advances by next_off computed from untrusted pkcs11_ref.size without validating each advancement against end, enabling mis-iteration or overshoot.']

ルール: weak_input_validation

['for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }', 'next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;', 'TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

フェーズ: ['unknown']

詳細: ['Reads pkcs11_attribute_head from untrusted offsets inside head via TEE_MemMove without explicit validation of pkcs11_ref.size beyond loop bounds; malformed attrs_size could cause logic errors.', 'Reads pkcs11_attribute_head from memory at cur into local struct; pkcs11_ref.size later used to compute next_off without stronger validation of serialized contents.', 'TEE_MemMove reads pkcs11_attribute_head from cur; next_off uses pkcs11_ref.size for loop advance—size field influences control flow and can lead to overflow if corrupted.', 'Copies header from cur (inside object attribute blob) into local pkcs11_ref; size field from that header influences subsequent next_off arithmetic (control-flow influence).', 'Copies attribute header from serialized region into stack (TEE_MemMove) and uses pkcs11_ref.size to compute next_off without prior validation of size field, enabling out-of-bounds or integer overflow if input is malicious.', "Copies header from serialized region (src 'cur') into stack struct without validating pkcs11_ref.size before using it to compute next_off; malicious size may cause logic/integer errors or loop misbehavior.", 'Header copied from serialized region without validating remaining bytes; header.size later trusted to compute next_off.', 'Reads pkcs11_attribute_head from cur (TEE_MemMove) where cur is computed from head and head->attrs_size; pkcs11_ref.size (data-controlled) is used to compute next_off and loop progression', 'Copies serialized attribute header from buffer at cur into local pkcs11_ref; source buffer derived from head and head->attrs_size influences src bounds and is potentially attacker-controlled', 'Parses pkcs11_ref from serialized blob and uses pkcs11_ref.size to advance and to derive pointers; if pkcs11_ref.size is attacker-controlled, loop arithmetic and pointer arithmetic may be unsafe.', "Call-site binding: destination 'dest' parameter is &pkcs11_ref, a TA-stack buffer (local), so copy writes into TA-private memory.", "Call-site binding: source 'src' parameter aliases 'cur' which points into serialized attribute blob derived from head (origin: REE -> parsed into TA storage).", "Call-site binding: size 'n' is sizeof(pkcs11_ref) here but callers use variable sizes elsewhere; record that size parameter influences copy length.", 'Copies header from serialized blob into local struct and then uses parsed size to advance loop; if parsed size is attacker-controlled, parsing and subsequent arithmetic may be unsafe.', 'Parses header from serialized attributes and relies on parsed pkcs11_ref.size for loop arithmetic; attacker-controlled size can break bounds and lead to OOB reads.', "Copies bytes from 'cur' (pointer into serialized attribute blob derived from REE-supplied templates) into local pkcs11_ref; source is REE-influenced and used to compute next_off", 'Reads pkcs11_attribute_head from cur and uses pkcs11_ref.size to compute next_off without explicit overflow/malformed-field protection; malformed size could flow to next_off and loop control.', 'Call-site binding: dest parameter (&pkcs11_ref) is a caller stack object (TA-private) receiving bytes.', "Call-site binding: src parameter (cur) points into serialized attributes buffer from 'head' (TA-owned serialized region).", 'Copies header at cur into pkcs11_ref and then uses pkcs11_ref.size to compute next_off; malformed or attacker-controlled sizes in serialized data can cause logic errors.', "Copies bytes from buffer 'cur' (parsed from head, possibly REE-originated) into local structure via TEE_MemMove; source origin ambiguous and copy length is derived from fixed sizeof destination.", 'Destination &pkcs11_ref is a TA stack/local structure (TEE-private) being written by memmove from a pointer into serialized object data.', "Source 'cur' points inside serialized attributes buffer derived from head; origin is TA-managed serialized object storage (TEE-private).", 'TEE_MemMove reads a fixed-size header from cur without confirming that sizeof(pkcs11_ref) bytes remain in the serialized attributes buffer; next_off is computed from the unvalidated pkcs11_ref.size, risking over-read.', "Copies bytes from 'cur' (within serialized object storage) into local pkcs11_ref structure; source derives from head->attrs_size data and could be malformed leading to incorrect next_off computation.", 'TEE_MemMove reads attribute header from serialized object at cur; next_off uses parsed size to advance — malformed size can cause out-of-bounds advancement and triggers TEE_Panic check', 'Copies attribute header from serialized object (cur) into local pkcs11_ref on stack; both source and destination are TA-managed memory but malformed size in header drives next_off and loop progress.', 'Reading a fixed-size header from cur without verifying remaining bytes >= sizeof(pkcs11_ref); malformed pkcs11_ref.size then drives next_off and loop progression.', 'Copies pkcs11_attribute_head from cur using TEE_MemMove without validating cur against end other than loop condition; malformed attrs_size or pkcs11_ref.size can cause out-of-bounds or panic', 'Copies pkcs11_attribute_head from parsed buffer at cur into local pkcs11_ref using size sizeof(pkcs11_ref) while cur/end bounds depend on head->attrs_size which may be malformed or REE-influenced', 'TEE_MemMove copies pkcs11_attribute_head from cur without ensuring cur+sizeof(pkcs11_ref) <= end; malformed head->attrs_size or pkcs11_ref.size can cause OOB read or panic.', "Uses pkcs11_ref.size (from serialized data in head) to compute next_off and advance 'cur' without additional bounds validation beyond final check; malformed size could cause incorrect traversal.", "Reads pkcs11_ref from serialized 'cur' (potentially untrusted/malformed) into local structure without validating embedded size before use.", 'Reads header from serialized blob and uses its size field to advance traversal without validating header availability first.', 'Copies sizeof(pkcs11_ref) from cur (derived from head + offset) into local pkcs11_ref; cur/end arithmetic uses head->attrs_size which may be derived from untrusted serialized data.', "Call-site binding: destination '&pkcs11_ref' is a TA-local stack buffer written by TEE_MemMove.", "Call-site binding: source 'cur' points into head->attrs (TA-private blob) and is used as read source for memmove.", 'destination &pkcs11_ref is a local TA stack buffer (TEE-private) being written from src; alias/binding of dst parameter to a local struct.', "source 'cur' points into head-derived buffer; origin may be TA-private or derived from untrusted/template data (unknown provenance).", 'length argument is a constant sizeof(pkcs11_ref); binding of size parameter to this constant observed at call-site.', 'Reads attribute header via TEE_MemMove from cur (derived from head) and uses pkcs11_ref.size to compute next offset (TA memory-driven pointer arithmetic).', 'Reads attribute header from cur (derived from head + offset) into local pkcs11_ref; source is TA attribute storage computed from head->attrs_size.', 'Reads pkcs11_attribute_head from cur (derived from head buffer) into local struct via TEE_MemMove; fields (size/id) are attacker-controlled if head originates from REE.', "Copies pkcs11_attribute_head from buffer 'cur' (potentially REE-controlled) into local struct; fields like size/id are attacker-controllable.", "Binding: destination pointer '&pkcs11_ref' (callee dest) is a TA-local stack location passed to TEE_MemMove.", "Binding: source pointer 'cur' (callee src) points into object buffer that may originate from REE/shared memory.", 'Deserializes pkcs11_attribute_head from cur via TEE_MemMove; pkcs11_ref.size directly affects next_off and loop stepping without per-field validation', 'Deserializes pkcs11_attribute_head from cur into local struct; pkcs11_ref.size subsequently used to compute next_off without validating size field', 'Reads attribute header from cur into pkcs11_ref via TEE_MemMove and trusts pkcs11_ref.size to compute next_off without verifying header bounds beyond loop condition; malformed size could cause next_off to skip/overrun.', 'Reads attribute header from potentially REE-influenced buffer into pkcs11_ref and trusts pkcs11_ref.size to compute next_off without further validation.', 'Uses pkcs11_ref.size from serialized data to compute next_off and advance cur without validating size limits beyond end check; malformed size may cause logic errors.', 'TEE_MemMove reads a pkcs11_attribute_head from cur (parsed from head); that parsed header controls subsequent pointer arithmetic.', "Parses serialized attribute header by copying from 'cur' into local pkcs11_ref; src originates from head payload and controls next_off used for pointer arithmetic.", 'reads attribute header from cur and uses pkcs11_ref.size to compute next_off and to set pointers/sizes without fully validating that the computed offsets lie within end', 'Copies pkcs11_attribute_head from cur (derived from head which may contain REE-supplied data) into stack struct; size used later (pkcs11_ref.size) is attacker-influenced if cur is untrusted.', 'Reads attribute header from cur and uses pkcs11_ref.size to compute offsets without proving the header fully fits inside the remaining buffer; malformed attrs_size can trigger OOB read or panic.', 'Copies attribute header from cur then uses pkcs11_ref.size to compute next_off without validating that pkcs11_ref.size keeps cur within bounds (next_off influences loop advance)', "Copies attribute header from 'cur' (derived from head which may be REE-supplied) into local pkcs11_ref without validating pkcs11_ref.size before use", 'reads attribute header from cur and uses pkcs11_ref.size to compute next_off without fully validating that the claimed size keeps cur within end', 'Copies sizeof(pkcs11_ref) bytes from cur (pointer into head buffer, often REE-derived) into local pkcs11_ref without validating that remaining length >= sizeof(pkcs11_ref)', 'Reads header from cur and uses its size to advance without validating that header read and next_off remain within the serialized buffer; can cause OOB or panic.', 'Reads pkcs11_ref header from cur and uses pkcs11_ref.size to advance and to populate pointers without validating that size fits remaining buffer', 'Copies pkcs11_ref header from cur (parsed from head which may be REE-controlled) into local struct without validating remaining bytes against pkcs11_ref.size', 'reads attribute header via TEE_MemMove from cur (derived from head) and uses pkcs11_ref.size to compute next_off without ensuring sizeof(pkcs11_ref)+pkcs11_ref.size is within end', 'Copies sizeof(pkcs11_ref) from cur (derived from head which may be REE-controlled) into local pkcs11_ref; size and subsequent next_off use fields from untrusted data without robust validation', 'Reads header from serialized attributes and uses header.size to compute next offset without verifying header fits completely within remaining buffer.', 'Reads pkcs11_attribute_head from cur (derived from head) and uses pkcs11_ref.size to compute next offset and pointers without validating size vs remaining bytes', 'Copies pkcs11_attribute_head from cur (derived from head built from caller data) into local pkcs11_ref using size sizeof(pkcs11_ref) without validating that remaining bytes >= sizeof(pkcs11_ref)', 'reads attribute header from cur and uses pkcs11_ref.size to compute next_off and outputs without explicit validation that cur+next_off stays within end (panic if exceeded later)', 'copies sizeof(pkcs11_ref) from cur (derived from head which may be REE-supplied) into local structure without validating that cur+sizeof(pkcs11_ref) <= end beyond loop bound check', 'Reads attribute header from cur and uses pkcs11_ref.size to advance; no explicit check that sizeof(pkcs11_ref) bytes remain before read.', 'Parses length (pkcs11_ref.size) from data in head and uses it to compute next_off and result pointers without validating pkcs11_ref.size against remaining buffer, enabling out-of-bounds reads.', 'Copies sizeof(pkcs11_ref) bytes from cur (derived from head, potentially REE-controlled) into local pkcs11_ref; length fields read later (pkcs11_ref.size) are then trusted to compute offsets.', "Call-site binding: destination '&pkcs11_ref' is TA-private stack storage (receives data from src).", "Call-site binding: source 'cur' derives from head which may be REE-supplied, so memmove reads untrusted memory.", "Parses pkcs11_attribute_head from untrusted 'cur' via TEE_MemMove and uses pkcs11_ref.size without validating it sufficiently before pointer arithmetic", "Copies pkcs11_attribute_head from parsed buffer 'cur' (untrusted) into local struct and uses its size for arithmetic without strong validation", 'Reads pkcs11_attribute_head from cur (untrusted-derived buffer) via TEE_MemMove and uses pkcs11_ref.size to compute next_off without robust validation', 'Copies pkcs11_attribute_head from cur (template/blob derived from REE) into local pkcs11_ref using supplied length, trusting blob fields for subsequent size arithmetic', 'Copies attribute header bytes from template region (cur) into local pkcs11_ref on stack; source may originate from REE-derived serialized data.', 'reads attribute header from cur (derived from head which may be REE-supplied) and uses pkcs11_ref.size to compute next offset without ensuring sizeof(header)+size stays within end before use', 'Copies header from cur (derived from head which may be REE-supplied) into local pkcs11_ref and then uses pkcs11_ref.size to compute offsets without ensuring header+size fit before use', 'Reads header from untrusted serialized attributes buffer and uses its size field to compute offsets without validating header fits in remaining buffer.', 'Reads pkcs11_attribute_head from cur via TEE_MemMove and uses pkcs11_ref.size to compute next_off without validating remaining buffer length against pkcs11_ref.size', 'Reads attribute header from cur into pkcs11_ref and uses pkcs11_ref.size to compute offsets without validating remaining buffer length first', 'Reads pkcs11_attribute_head from potentially attacker-controlled template buffer via TEE_MemMove; pkcs11_ref.size used to advance loop and influence writes.', 'Destination &pkcs11_ref is a local stack object; callee will write into caller stack.', "Source 'cur' points inside template buffer derived from head; origin is head-based buffer (parsed data).", 'Reads pkcs11_attribute_head from cur with TEE_MemMove using size from ref data; insufficient validation that remaining bytes >= sizeof(header) before copy.', 'Copies pkcs11_attribute_head from cur into local struct without an explicit remaining-bytes check before the copy; cur derived from head->attrs_size.', 'Copies sizeof(pkcs11_ref) bytes from cur (pointer into head buffer) into local pkcs11_ref; src provenance (template bytes) is ambiguous', 'TEE_MemMove reads pkcs11_attribute_head from cur (derived from head) without explicit per-entry bounds check before using pkcs11_ref.size to compute next_off; later cur> end triggers panic but intermediate uses may dereference invalid lengths.', 'Copies pkcs11_attribute_head from cur (derived from head) without validating cur+sizeof(header) <= end before reading header->size, enabling malformed sizes to influence next_off.', 'Parses attribute headers from buffer using pkcs11_ref.size to compute next offset and pointer results; if headers are corrupted/malicious, loop arithmetic may be influenced.', "Call-site binding: destination &pkcs11_ref is a local stack object written from 'cur' (caller-controlled buffer region).", "Call-site binding: source 'cur' points into attribute buffer derived from head->attrs_size; origin may be attacker-influenced if head stems from REE.", 'Copies header then uses pkcs11_ref.size to compute next_off and pointers; malformed sizes in attributes can influence loop bounds and pointer arithmetic.', 'reads pkcs11_ref header from cur (derived from head) and uses pkcs11_ref.size to compute next_off and pointer writes without explicit check that sizeof(header)+size <= end', 'Copies header from cur (derived from head which may be REE-supplied) into local struct using sizeof(header) without proving that sizeof+payload fits before reading payload size', 'Header read uses pkcs11_ref.size to advance without prior validation that header+payload fit inside head->attrs_size.', 'Reads pkcs11_ref from cur and uses pkcs11_ref.size to compute next_off without validating that pkcs11_ref.size fits within remaining bytes', 'Reads header from cur (derived from head->attrs_size) and uses header.size to compute next offset without validating header.size against remaining bytes', 'Unvalidated read of header from serialized attributes where embedded size fields (pkcs11_ref.size) and remaining buffer length are not adequately checked.', 'Call-site binding: destination &pkcs11_ref is a local TA stack buffer (receives bytes copied by TEE_MemMove).', "Call-site binding: source 'cur' points into head->attrs storage (TA-private) and is read by TEE_MemMove.", 'Copies sizeof(pkcs11_ref) from cur without an explicit pre-check that cur+sizeof(pkcs11_ref) is <= end on the exact read site.', 'Reads pkcs11_ref from object memory and uses pkcs11_ref.size to advance cur (next_off) without explicit upper-limit on pkcs11_ref.size, risking out-of-bounds if attrs_size is corrupted.', "Call-site binding: destination '&pkcs11_ref' is a caller stack buffer (TA-private) receiving data copied from object memory.", "Call-site binding: source 'cur' points into object attribute storage (head+offset) which is TA-private memory.", 'Uses pkcs11_ref.size (read from src) to compute next_off without constraining pkcs11_ref.size against remaining attrs_size; a corrupted size can cause out-of-bounds reads.', 'Reads header then uses header.size to compute next_off without validating size against remaining attrs_size.', 'parsing uses pkcs11_ref.size from buffer to compute next_off and pointer targets without validating size bounds or provenance', 'Copies header from buffer at cur using size from code; pkcs11_ref.size later used to compute offsets without validating that size is sane or provenance of cur', "Copies bytes from 'cur' (pointer into attribute buffer possibly derived from REE) into local pkcs11_ref struct; src is REE-derived so could be attacker-controlled", 'Reads pkcs11_attribute_head from cur using TEE_MemMove; cur is derived from head->attrs_size and may be attacker-controlled leading to malformed sizes/next_off', 'Copies bytes from cur (derived from head, potentially REE-supplied) into local pkcs11_ref on stack; source provenance uncertain', 'Parsing loop uses sizes from serialized attributes (possibly REE-controlled) to derive next offsets; malformed sizes may drive out-of-bounds reads or large jumps.', 'Reads attribute header from cur (derived from head + offset) with TEE_MemMove using attacker-controlled offsets/size; pkcs11_ref.size then drives next_off without validation.', 'Copies header from cur (derived from head+offset where head.attrs_size is attacker-influenced) into pkcs11_ref using len sizeof(pkcs11_ref) while next_off is computed from untrusted pkcs11_ref.size.', 'Copies header from cur (possibly REE-derived shared buffer) into stack struct pkcs11_ref, binding shared src into TA-private destination']

ルール: weak_input_validation, other

['TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));', 'TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;', 'next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120

フェーズ: ['unknown']

詳細: ['Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size derived from data in memory; if pkcs11_ref.size is corrupted this can misadvance cur causing out-of-bounds or infinite loop.', 'Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from data read by line 119; corrupted size can misadvance cur causing out-of-bounds or infinite loop.', 'pkcs11_ref.size (from the copied header) is used to compute next_off and drive loop advancement; if pkcs11_ref.size is corrupted, parsing can exceed bounds or trigger panic.', 'Uses pkcs11_ref.size (read from serialized data) to compute next_off and to set attr_size; untrusted size can influence pointer arithmetic and later copies', 'pkcs11_ref.size from serialized data is used to compute next_off and later as reported attr_size; untrusted size can influence pointer arithmetic and later copies', 'Uses pkcs11_ref.size (from untrusted input) to compute next_off and advance cur, enabling input-driven out-of-bounds pointer arithmetic.', 'Uses attacker-controlled pkcs11_ref.size to compute next_off and advance cur, enabling input-driven out-of-bounds arithmetic.', 'Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from unvalidated pkcs11_ref.size; if pkcs11_ref.size is large it may make cur advance past end leading to panic.', 'Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from untrusted pkcs11_ref.size without validating it against remaining buffer, enabling cursor overrun.', 'Parsed pkcs11_ref.size from untrusted data is used to compute next_off and later pointer writes without validation, enabling further OOB when malformed.', 'Uses pkcs11_ref.size (from untrusted header) to compute next_off and advance parsing pointer; a crafted size can cause out-of-bounds advancement or TEE_Panic.', 'Uses pkcs11_ref.size (from untrusted bytes) in next_off arithmetic (cur += next_off), enabling out-of-bounds/oversize traversal if manipulated', 'Uses pkcs11_ref.size (from untrusted blob) in next_off arithmetic enabling out-of-bounds traversal if manipulated.', 'Uses untrusted pkcs11_ref.size to compute next_off and advance cur without validating remaining buffer length first.', 'Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size where pkcs11_ref.size is from parsed buffer; a crafted size could cause loop misbehavior or overflow.', 'Computed next_off uses pkcs11_ref.size from parsed header; a crafted size may cause loop misbehavior or arithmetic overflow leading to out-of-bounds.', 'pkcs11_ref.size (from serialized data) is used to compute next_off without validating it against remaining buffer, enabling loop-control manipulation.', "pkcs11_ref.size from the copied header is used to compute next_off and advance 'cur' without sanitizing size; malformed sizes can corrupt loop bounds and subsequent pointer math.", 'Uses pkcs11_ref.size (from untrusted data) to compute next_off for loop advancement without validating that next_off keeps cur within bounds.', 'Uses pkcs11_ref.size (from untrusted input) to compute next_off without validating it keeps cur within bounds, enabling overflow/panic.']

ルール: other, weak_input_validation

['next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;']
other MEDIUM

関数: ['=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130

フェーズ: ['unknown']

詳細: ["Writes out pointers into the serialized buffer (cur + sizeof(pkcs11_ref)) into caller-provided attr array; these pointers alias into head's memory", "Writes out pointers into caller-provided attr array pointing inside serialized blob; these alias into head's memory and rely on head being well-formed", 'Assigns out pointers into regions computed from cur (cur + sizeof(pkcs11_ref)), exposing pointers into internal attribute storage to the caller via attr.', 'Assigns pointers into internal attribute storage to out-parameters (attr), exposing internal pointers to callers in TA context.', "Out-parameters 'attr' and 'attr_size' are populated with pointers/sizes derived from head; these pointers later escape to callers.", 'assigns pointers (cur + sizeof(pkcs11_ref)) into output attr array when pkcs11_ref.size claimed by head may be attacker-controlled', 'Writes pointers into attr/attr_size arrays based on cur + sizeof(pkcs11_ref) where cur is derived from head (caller-controlled); resulting pointers may point into untrusted regions.', 'Populates attr_size out-entries from pkcs11_ref.size which later callers use for bounds checks; correctness depends on pkcs11_ref.size integrity', 'Assigns pointers into attribute storage (cur + sizeof(pkcs11_ref)) into caller-supplied array without verifying overall array capacity (max_found), potential write-past of attr buffer.', 'Assigns pointers into attribute storage into caller-supplied array attr_ptr without explicit verification of caller-supplied array capacity (max_found).', 'assigns pointers into head buffer (possibly shared) into caller-provided attr array without verifying that resulting pointers are safe or canonical', 'Assigns pointers into parsed head buffer into caller-provided attr array without validating that resulting pointers are within bounds or originate from safe memory.']

ルール: other, weak_input_validation

['*attr_ptr++ = cur + sizeof(pkcs11_ref);', 'if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; } if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;', 'if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }', '*attr_ptr++ = cur + sizeof(pkcs11_ref); *attr_size_ptr++ = pkcs11_ref.size;', 'if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131

フェーズ: ['unknown']

詳細: ["Writes pointers into caller-provided 'attr' array pointing into serialized attribute payload (exposes TEE-private addresses/content to caller context within TA flow).", 'Writes pointers into caller-provided attr array pointing into serialized payload; relies on pkcs11_ref.size and offsets computed earlier.', "Assigns pointers into the serialized attribute buffer (cur + sizeof(pkcs11_ref)) into attr array; these pointers alias into head's memory", "Assigns pointers into the serialized attribute buffer into attr array; these pointers alias into head's memory and may point into attacker-controlled serialized data", 'Stores pointers (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; if head is REE-originated these pointers reference shared memory', 'Assigns pointers into the attributes blob (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; these pointers alias into template-derived memory', 'Assigns pointers into the attributes blob (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; these pointers alias into template-derived memory.']

ルール: other

['*attr_ptr++ = cur + sizeof(pkcs11_ref);', 'if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:132

フェーズ: ['unknown']

詳細: ['Stores pointers into attr array that point inside the head buffer (cur + sizeof(pkcs11_ref)); these pointers may reference shared/REE-originated memory.', 'Stores pointers into attr array that point inside the head buffer; these may reference REE-originated memory.']

ルール: other

['*attr_ptr++ = cur + sizeof(pkcs11_ref);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137

フェーズ: ['unknown']

詳細: ['Writes attribute sizes (pkcs11_ref.size) into caller-provided attr_size array; sizes derived from serialized data affect downstream bounds checks and copies', 'Writes attribute sizes (pkcs11_ref.size) into caller attr_size array; sizes originate from untrusted attribute metadata', 'Writes attribute sizes (pkcs11_ref.size) into caller attr_size array; sizes originate from untrusted attribute metadata.']

ルール: other

['*attr_size_ptr++ = pkcs11_ref.size;']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145

フェーズ: ['unknown']

詳細: ['If cur > end the code calls TEE_Panic(0) indicating detection of malformed attributes; this is an abort-path rather than graceful error handling.', 'If cur > end the code calls TEE_Panic(0); this is an abort-path rather than graceful error handling and may be triggered by malformed attributes.', 'Post-loop check panics if cur > end, indicating reliance on header sizes for memory safety; malformed attrs_size can trigger TEE_Panic.', 'If cur advances past end the code TEE_Panic(0) (hard failure) is invoked; this is a defensive check but results in panic rather than graceful error handling.', 'If parsing overruns end the code calls TEE_Panic(0), which is a hard failure rather than graceful handling.', 'Advancing cur by attacker-controlled next_off can exceed end; code panics via TEE_Panic if cur > end rather than safely returning an error.', 'Advancing cur by attacker-controlled next_off can exceed end; code panics via TEE_Panic if cur > end rather than returning an error.', 'If parsing overruns end, code calls TEE_Panic which aborts execution; this is a hard failure on malformed data.', 'If parsing overruns end the code calls TEE_Panic(0) which is a hard failure on malformed data.', 'function panics if cur > end (TEE_Panic) which can be triggered by malformed pkcs11_ref.size from untrusted input', 'Function calls TEE_Panic if cur > end, which is triggered by malformed sizes from untrusted input; this is a denial-of-service risk.', 'If parsed next_off causes cur to advance beyond end, code panics (TEE_Panic), creating denial-of-service on malformed input', 'If parsed next_off causes cur to advance beyond end, code calls TEE_Panic causing denial-of-service on malformed input.', 'detects cur > end and calls TEE_Panic; malicious head->attrs_size or pkcs11_ref.size can trigger panic or OOB before this check', 'cur > end check causes TEE_Panic; malformed sizes can trigger panic or OOB before this check.', 'If parsed next_off causes cur to exceed end the code calls TEE_Panic; lack of graceful handling of malformed head is a structural risk', 'function panics if cur > end, indicating a structural risk when parsing untrusted serialized attributes', 'Function calls TEE_Panic if parsing advances past end, indicating fragile handling of malformed input.', 'if parsing overruns (cur > end) code calls TEE_Panic, indicating lack of graceful handling for malformed REE-provided data', 'If parsing overruns, function calls TEE_Panic(0) which is a denial-of-service risk when fed malformed lengths from head.', 'When parsing overruns are detected callers invoke TEE_Panic after detecting cur > end which is a denial-of-service path if memmove reads malformed lengths.', 'On parse overrun the code calls TEE_Panic(0), which is a denial-of-service risk when fed malformed lengths from head.', 'If pkcs11_ref.size is crafted large, next_off may advance cur past end triggering TEE_Panic; this is a structural risk from untrusted length fields', 'If next_off pushes cur past end the function calls TEE_Panic; parsing of untrusted lengths is a structural risk.', 'Panics if parsing advances past end (cur > end); malformed or crafted pkcs11_ref.size can trigger panic (availability risk)', 'Computes next_off from untrusted pkcs11_ref.size and advances cur by next_off; if next_off causes cur > end the code panics (TEE_Panic), indicating insufficient validation']

ルール: other, weak_input_validation

['if (cur > end) { DMSG("Exceeding serial object length"); TEE_Panic(0); }', 'next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; ... if (cur > end) { TEE_Panic(0); }']
other MEDIUM

関数: ['unknown', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150

フェーズ: ['unknown']

詳細: ['Function returns pointers/size values (attr_ptr/attr_size) that alias into attribute storage derived from REE data; downstream copies use these values for memmoves and must be bounds-checked.', 'Updates caller-provided count with number of matches found; caller logic depends on this count for further decisions']

ルール: other

['get_attribute_ptrs populates attr and attr_size arrays with pointers/sizes into serialized attributes.', '*count = found;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156

フェーズ: ['unknown']

詳細: ["Binding callee 'head' to caller-provided object attributes; attributes are TA-managed metadata (treated as TEE-private).", "Binding callee 'attr_ptr' to caller pointer; attr_ptr is set to point into attribute storage (TEE-private) and later used by callers.", "Binding callee 'attr_size' to caller pointer; attr_size is updated with attribute size and used for bounds checks by callers.", "Call-site binding: 'head' parameter aliases callers' object attributes (origin TEE-private object state).", "Call-site binding: 'attr_ptr' is an out-parameter that will receive a pointer into attribute storage; caller supplied pointer origin varies (caller stack or variable).", "Call-site binding: 'attr_size' is caller-provided size pointer used to return attribute size; its value influences downstream buffer checks."]

ルール: other

['get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160

フェーズ: ['unknown']

詳細: ['Relies on get_attribute_ptrs to validate attribute existence and pointer integrity; only checks count and rc but does not further validate attr_ptr contents or size semantics', 'Function trusts get_attribute_ptrs to produce a single valid pointer/count and uses count checks to decide; malformed attr lists may bypass expectations.', 'Returns NOT_FOUND when count==0 and GENERAL_ERROR when count!=1; callers depend on these semantics for control flow', 'Relies on count returned by helper; if helper returns unexpected sizes or multiple entries, function returns GENERAL_ERROR but does not sanitize pointer contents further.']

ルール: weak_input_validation, other

['if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;']
other MEDIUM

関数: ['=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180

フェーズ: ['unknown']

詳細: ["Binding callee 'attr_size' to caller pointer (e.g., &size in callers); used for bounds check and updated on return.", "Call-site binding: callee parameter 'attr_size' is caller stack (&size) used for bounds check and updated by callee.", "Call-site binding: callee 'attr_size' parameter aliases caller local &size; used for bounds check and updated on buffer-too-small return.", 'Call-site binding: attr_size pointer aliases caller-provided size (e.g., &size in caller); used to check and report required size back to caller.', "Call-site binding: 'attr_size' parameter points to caller's size variable (used for buffer sizing information)", "Relies on get_attribute_ptr to provide correct size; only checks caller's provided attr_size against size but does not validate attr_ptr provenance/format.", "Binding: 'attr_size' is caller-provided length pointer; it is read and may be updated with required size causing control flow (BUFFER_TOO_SMALL path).", "Length 'size' returned by get_attribute_ptr is used to control the copy; its provenance affects safety of the move."]

ルール: other, weak_input_validation

['if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }', 'rc = get_attribute(head, attribute, &bbool, &size);']
other MEDIUM

関数: ['TEE_MemMove', '=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186

フェーズ: ['unknown']

詳細: ["Copies 'size' bytes from attr_ptr into caller buffer 'attr' via TEE_MemMove; attr_ptr provenance depends on get_attribute_ptr and size-driven copy could overwrite if callers misreport attr_size (handled above).", "TEE_MemMove copies 'size' bytes from attr_ptr into attr; relies on earlier attr_size check when attr_size provided.", 'Copies attribute bytes from attr_ptr into caller buffer via TEE_MemMove; safety relies on prior attr_size check which is conditional (attr_size may be NULL).', "Copies 'size' bytes from attr_ptr into caller buffer via TEE_MemMove after a size check; if attr_ptr refers to untrusted/shared memory or size is attacker-influenced, this may expose data or cause overflow if checks bypassed.", 'Internal copy: TEE_MemMove(attr, attr_ptr, size) moves attribute bytes from stored attribute pointer into caller buffer.', "Binding callee 'attr' to caller buffer (e.g., &bbool in callers); attr is written via TEE_MemMove from attr_ptr.", "TEE_MemMove copies attribute data from attr_ptr (object storage) into caller buffer 'attr'; attr_ptr is TEE-side attribute storage, attr may be TA-local or caller-provided buffer.", "TEE_MemMove copies 'size' bytes from attr_ptr into attr when attr is non-null; attr_ptr provenance not strongly validated here beyond get_attribute_ptr's rc", 'Copies attribute value from attr_ptr into caller buffer attr (e.g., &bbool); attr_ptr provenance comes from get_attribute_ptrs and may point to TA or earlier REE-derived memory', 'Copies attribute value from attr_ptr into caller buffer attr; attr_ptr provenance stems from parsed data and depends on get_attribute_ptrs correctness.', "TEE_MemMove copies 'size' bytes from attr_ptr into attr; if attr points to caller-controlled shared memory, this performs a write into caller region (bounds checked via attr_size).", "TEE_MemMove copies 'size' bytes from attr_ptr into attr; size originates from get_attribute_ptr (caller-derived data) and could be attacker-influenced if attr_ptr points into REE-origin data", "Call-site binding: callee parameter 'attr' is caller stack (&bbool) passed to be written by get_attribute (TA-local buffer).", 'Copies from attr_ptr (origin determined by get_attribute_ptr) into provided buffer; attr_ptr origin and size must be trusted/validated upstream.', "Copies attribute data from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; if callers pass a REE-visible buffer elsewhere, this is a TA->REE copy vector.", "TEE_MemMove copies attribute bytes from attr_ptr (derived from object attrs) into caller buffer 'attr'; attr_ptr content origin may be TA-private object data.", 'Relies on get_attribute_ptr to return correct size and pointer; if get_attribute_ptr is influenced, callers may receive unexpected attribute data.', 'copies size bytes from attr_ptr into attr via TEE_MemMove where size is derived from get_attribute_ptr; limited bounds check only compares caller-provided *attr_size and may not validate attr_ptr provenance', 'Copies attribute payload into caller buffer where size originates from attribute metadata; insufficient provenance checks may allow buffer-too-small conditions upstream.', "Copies 'size' bytes from attr_ptr into caller buffer attr; size originates from stored attribute metadata and attr pointer provenance may be untrusted if caller passed REE-visible buffer", 'copies size bytes from attr_ptr into caller buffer attr via TEE_MemMove relying on get_attribute_ptr-provided size without revalidating attr_ptr or that size matches caller buffer', 'Copies size bytes from attr_ptr into caller buffer attr after size determined by metadata from get_attribute_ptr; attr_ptr provenance may be untrusted and size validation relies on attr_size check only', "TEE_MemMove copies 'size' bytes from attr_ptr into attr relying on prior attr_size check; if attr_size is NULL or attr not large enough this can cause overflow", "Call-site binding: 'attr' (destination) at this call is &bbool from caller (TA-local buffer)", 'Copies size bytes from attr_ptr into attr without validating attr_ptr provenance or ensuring size is bounded by caller buffers beyond attr_size check', 'copies size bytes from attr_ptr (derived from head, possibly REE-supplied) into attr without additional validation of attr_ptr provenance; relies on earlier size check which may be manipulated', "Copies attribute payload of size 'size' derived from head into caller buffer; relies on prior size checks.", "Copies attribute bytes from attr_ptr (sourced from head via get_attribute_ptr) into caller buffer 'attr'; attr_ptr may originate from REE-parsed data.", "Copies attribute bytes from attr_ptr (may point into REE-origin parsed buffer) into caller buffer 'attr'.", 'Copies attribute bytes from attr_ptr into caller buffer attr via TEE_MemMove; if attr points to REE-visible memory this writes into shared memory', "Binding: 'attr' is destination pointer supplied by caller (often &boolval or &key_length) and will receive size bytes from attr_ptr via TEE_MemMove.", "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from attr metadata; correctness depends on get_attribute_ptr's validation of attr_ptr/size", 'Copies attribute payload from attr_ptr to attr via TEE_MemMove; relies on prior size check to avoid overflow.', "TEE_MemMove copies 'size' bytes from attr_ptr into attr; size originates from get_attribute_ptr and attr_ptr region is not validated, so upstream input validation is weak.", 'General copy site where size is derived from get_attribute_ptr; callers must supply correct attr_size to avoid buffer issues.', "Copies 'size' bytes from attr_ptr into caller buffer; size is derived from metadata and relies on get_attribute_ptr correctness.", "TEE_MemMove performs raw memory copy using caller-provided size 'size' without validating attr_ptr provenance or ensuring dest buffer capacity here.", 'Generic memory copy can write into REE-visible buffers if callers pass shared memrefs as dest; potential shared-memory overwrite depending on caller context', 'Copies attribute bytes from attr_ptr into caller buffer attr via TEE_MemMove; if caller supplies a REE-visible destination this writes into shared memory.', 'Generic memory copy can write into REE-visible buffers if callers pass shared memrefs as dest; potential shared-memory overwrite depending on caller context.']

ルール: other, weak_input_validation

['if (attr)\n    TEE_MemMove(attr, attr_ptr, size);', 'if (attr) TEE_MemMove(attr, attr_ptr, size);', 'TEE_MemMove(attr, attr_ptr, size);', 'rc = get_attribute(head, attribute, &bbool, &size);', 'rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

フェーズ: ['unknown']

詳細: ["Binding: attr buffer (dst) is written from attr_ptr (src) with size 'size'; attr/attr_ptr provenance comes from caller-managed structures", 'Copies attribute value from attr_ptr into attr buffer; attr_ptr provenance may be REE-derived', 'Copies attribute value into attr buffer from attr_ptr; binding shows src may originate from obj blob and dst may be TA-managed buffer.', 'Copies attribute value into provided attr buffer from attr_ptr; origin and size of attr_ptr may be TA or REE-controlled (uncertain)', 'copies attribute data from attr_ptr into attr buffer using size parameter; origin and bounds of attr/attr_ptr depend on upstream parsing', "Binding: 'attr' destination pointer provided by caller (TA-private target for attribute data)", "Copies 'size' bytes from attr_ptr (which may point into parsed/unchecked input) into attr without validating bounds", 'Copies attribute bytes from attr_ptr (possibly REE-derived) into attr buffer pointer provided by caller; bind src provenance', "Copies attribute bytes from internal attr_ptr into caller buffer 'attr' using size determined by attribute metadata; attr is caller-provided and must be trusted for capacity checks performed earlier.", 'Copies attribute bytes from internal attr_ptr into caller buffer using size determined by metadata; relies on earlier size checks.', "Copies attribute payload pointed by attr_ptr into caller-provided buffer 'attr'; relies on prior attr_size check to avoid overflow.", "Copies attribute payload from attr_ptr (may point into serialized/REE-controlled area) into caller buffer 'attr'; safety relies on prior attr_size checks at caller.", 'Copies attribute payload into caller buffer; relies on caller-provided attr_size checks to avoid overflow.', 'Copies attribute value from attr_ptr (pointer into serialized region) into caller buffer attr; attr_size is used as bound and may be influenced by serialized data', "Copies attribute payload from attr_ptr (pointer returned by get_attribute_ptrs) into caller buffer 'attr'; attr_ptr may alias TA storage that was populated from REE-origin data", "Copies attribute bytes from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; destination origin may be REE-visible leading to shared-write risk.", 'Copies attribute bytes from attr_ptr into caller-provided buffer via TEE_MemMove; destination may be caller-controlled REE-visible buffer leading to possible info disclosure later.', "Caller-provided buffer 'attr' (could be caller stack or caller-supplied) is written from attr_ptr via TEE_MemMove; origin of attr in callers varies.", "Copies attribute data from attr_ptr (object storage) into caller buffer 'attr'; destination is caller-provided and may vary (TA-local or caller-managed), affecting exposure.", 'Copies attribute data from attribute storage into caller buffer; downstream exposures possible if attributes contain sensitive values and are later copied to REE.', "TEE_MemMove copies attribute data from attr_ptr into caller-supplied buffer 'attr'; destination size is checked earlier but copy uses 'size' determined by get_attribute_ptr", "Copies attribute payload from attr_ptr (inside serialized object) into caller-supplied buffer 'attr'; attr and attr_size were previously checked for size but copy length is derived from parsed size.", "Copies 'size' bytes from attr_ptr into caller buffer 'attr'; destination may be caller stack or shared memory depending on caller.", "Copies 'size' bytes from attr_ptr into caller-provided attr; size originates from get_attribute_ptr and may reflect unvalidated data-derived size.", "Copies 'size' bytes from attr_ptr into attr; size comes from get_attribute_ptr (which may be derived from unvalidated serialized data).", "Call-site binding: dest 'attr' may be caller buffer (could be TA-local or caller-provided) receiving attribute bytes from attr_ptr (pointer into TA-private storage).", "Copies attribute value from attr_ptr (internal attribute storage) into caller-supplied buffer 'attr' (TA-local buffer in this call-site); relies on prior size checks but src length drives copy.", "Copies attribute payload into caller-provided buffer 'attr' using size from attribute metadata; destination is caller memory and size originates from attribute list", 'Copies attribute payload into caller buffer using size from attribute metadata; relies on prior parsing correctness', "Copies attribute payload into caller-provided buffer 'attr' from attr_ptr; origin of attr_ptr may be REE-derived and destination region depends on caller.", "Copies attribute bytes from attr_ptr (object storage) into caller buffer 'attr'; attr may be caller-provided and thus the copy can expose TA-held data if attr is REE-visible.", 'Copies attribute bytes from object storage into caller buffer; if caller buffer is REE-visible this can disclose TA-held data.', 'Copies attribute bytes from attr_ptr (points into head) into caller buffer; size is derived from attr metadata and may be larger than caller buffer if not validated by caller.', "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from metadata; caller previously relied on get_attribute_ptr for size", "Copies 'size' bytes from attr_ptr (pointer into attribute storage) into caller buffer attr; relies on upstream attr_size checks to be correct", "Copies 'size' bytes from attr_ptr (pointer derived from head contents) into caller buffer attr; size originates from metadata and may be untrusted", 'Copies attribute payload into caller buffer using size from metadata without validating attr_ptr provenance and remaining buffer.', "Copies 'size' bytes from attr_ptr (found by parsing possibly REE-origin data) into caller buffer attr; relies on prior attr_size checks but attr may be NULL or attr_size absent leading to misuse", 'Copies attribute payload from attr_ptr into caller-supplied attr buffer; provenance of attr_ptr depends on head/candidate (could be shared), size comes from attribute metadata', 'copies size bytes from attr_ptr (derived from parsed head content) into caller buffer attr; relies on earlier size checks which may be manipulated and attr_ptr provenance is from head', 'Copies attribute bytes from attr_ptr (may point into untrusted-derived region) into attr buffer without extra validation beyond size checks performed by callers.', "Copies attribute bytes from attr_ptr (which may point into REE-origin parsed buffer) into caller buffer 'attr'", 'Copies attribute data from attr_ptr into caller buffer attr; if attr points to REE-visible memory this writes into shared memory', "Copies attribute payload from attr_ptr (TA-resident pointer into template) into caller buffer 'attr' (often TA-local); size driven by attr_ptr-derived size.", 'Copies attribute payload from attr_ptr into caller-provided buffer attr; caller previously checked sizes but attr_ptr provenance depends on earlier lookup', 'Copies attribute payload into caller buffer after a size check, but attr_ptr provenance depends on earlier parsing; potential issues if earlier parsing was inconsistent.', "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from metadata; correctness depends on attr_ptr/size validated upstream", "Destination 'attr' is caller-provided buffer (may be TA-private or point into template); callee writes attribute payload into it.", "Source 'attr_ptr' is pointer into attribute storage (from get_attribute_ptrs); callee reads from TA-side storage.", "Copies attribute value pointers/data into caller-supplied buffer 'attr' using size from attribute metadata; destination/capacity not validated here.", 'Copies attribute pointer(s) into caller-provided attr array (out-parameter); creates aliases to locations inside head', 'Copies attr_ptr array into caller-supplied attr buffer using size from caller; binding writes pointers into caller memory (alias of &req_attrs in caller).', 'Copies attribute pointers into caller-supplied buffer using size from caller; improper sizes could overwrite caller memory.', 'Copies attribute bytes to caller-provided attr pointer; attr (destination) origin may be REE or TA depending on caller, so alias binding is uncertain', 'Copies attribute value to caller-provided buffer; destination origin may be TA or REE and size is derived from parsed data.', "Copies attribute value into caller-supplied 'attr' pointer; destination origin depends on caller (may be REE-visible) — binding of callee param to caller-provided buffer", "Call-site binding: destination 'attr' (caller buffer) may be populated from attr_ptr data; origins depend on caller (populated pointers into head).", 'Copies attribute pointers/content from attr_ptr into caller-provided attr destination; origin of attr_ptr may be derived from parsed buffers', 'Copies attribute payload pointers/bytes from attr_ptr into attr buffer provided by caller; attr_ptr may alias into REE-derived buffers', 'Writes into attr (caller-provided output pointer) data from attr_ptr (derived from parsed object), binding caller outputs to parsed buffer', 'Copies attribute value pointer data from attr_ptr into attr buffer using size from caller; source/size may be attacker-controlled.', 'Copies attribute data to attr (output array) from attr_ptr; binding of potential TA/REE sources into attr destination', "Copies 'size' bytes from attr_ptr into caller buffer 'attr' via TEE_MemMove; if pointers or size are tainted/misreported this can overwrite destination.", "Call-site binding: destination 'attr' aliases caller buffer (&bbool) provided by get_attribute caller.", "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr and is used as copy source.", "Copies attribute bytes from attr_ptr into caller stack buffer 'attr' (both TA-private); size determined by 'size'.", "Binding of destination pointer 'attr' (caller buffer) into TEE_MemMove; origin is caller-local (&bbool) in this call-site and considered TEE-private.", "Binding of source pointer 'attr_ptr' (attribute storage) into TEE_MemMove; origin from get_attribute_ptr may be TA-managed or derived from REE-parsed data (ambiguous).", "Copy operation relies on prior conditional attr_size check; if attr_size is NULL caller-safety isn't enforced here (attr assumed non-NULL).", "destination pointer 'attr' is caller-provided buffer used as TEE_MemMove destination; may be smaller than 'size' unless caller-checked", "source pointer 'attr_ptr' originates from get_attribute_ptr and is copied into caller buffer; source provenance may be caller-influenced templates", "length parameter 'size' controls the copy and originates from get_attribute_ptr; if attacker-influenced, may cause over-read/over-write if caller's attr_size not properly checked", "Call-site binding: destination 'attr' aliases caller-local buffer (&bbool) which is TA-private; record binding of dst to TA-private.", "Destination 'attr' is a caller-local TA buffer (&bbool) receiving data via TEE_MemMove; dest is TA-private but may receive REE-influenced content", "Source 'attr_ptr' may alias object attribute storage that was derived from REE-provided templates; provenance REE->TA (attr content REE-influenced)", "Length 'size' is used to control the copy; although checked earlier, its provenance may be influenced by attribute metadata", "Dest parameter 'attr' aliases caller stack buffer (&bbool) which receives bytes from stored attribute; origin is TA stack (TEE-private).", "Src parameter 'attr_ptr' is pointer into stored attribute data (TA-owned), treated as TEE-private source for copy.", "Size parameter 'size' originates from attribute metadata and is used to control the copy; if incorrect it can cause overflow of dest.", "Copies attribute bytes from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; destination origin (caller buffer) can be TA-private or caller-controlled (ambiguous).", 'Copies attribute bytes into caller buffer; destination origin can be TA-private or caller-controlled and attr_ptr provenance is ambiguous.', "Destination 'attr' is a caller-provided buffer (e.g., &bbool) bound into this helper and written via TEE_MemMove.", "Copies attribute data from attr_ptr (TEE-private object storage) into caller buffer 'attr'; if caller buffer aliases REE-visible memory this can expose TA data.", "Binding: destination pointer 'attr' at call-site may be a caller-provided buffer (e.g., &bbool or REE-origin); record origin as TEE-private for local buffers or REE-visible when caller supplies shared mem.", "Binding: source pointer 'attr_ptr' originates from get_attribute_ptr (object attribute storage) and is treated as TEE-private.", "alias of destination 'attr' bound to caller buffer (stack-local bbool in get_bool); copies from attr_ptr into caller buffer", "TEE_MemMove performs a raw memory copy from attr_ptr to attr; caller-side size check exists but copy uses 'size' returned by get_attribute_ptr which must be trusted", "Destination 'attr' is caller stack memory (TEE-private) while source 'attr_ptr' provenance is from get_attribute_ptr and may be unknown/shared; alias/binding of pointers at call-site", "Copies 'size' bytes from src to dst without in-function validation of src/dst regions or that dst has at least 'size' bytes (relies on caller); if caller-supplied sizes are tainted this is risky", "Call-site binding: destination 'attr' (&bbool) is caller memory (TA stack) and will be written by TEE_MemMove.", "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr (attribute storage) and is read as src for the move.", 'alias of caller-provided destination buffer (attr) passed into TEE_MemMove; destination originates from caller-local &bbool in get_bool', 'alias of source pointer (attr_ptr) passed into TEE_MemMove; attr_ptr originates from get_attribute_ptr and its region could be TA-private or REE-visible (unknown)', "copies 'size' bytes from attr_ptr into attr without validating that attr_ptr points to trusted memory region; size originates from get_attribute_ptr and may be influenced by input", "Call-site binding: dest 'attr' is caller stack (&bbool) (TA-private) written by TEE_MemMove.", "Call-site binding: src 'attr_ptr' originates from get_attribute_ptr (obj attributes, TA-private).", "destination 'attr' is a caller-local buffer; TEE_MemMove will write up to 'size' bytes into it based on attr_ptr-derived size", "source 'attr_ptr' derives from get_attribute_ptr(head, ...); provenance of attr_ptr depends on head (caller-controlled), may be TA-private or unknown", "TEE_MemMove copies up to 'size' bytes from attr_ptr into caller buffer 'attr'; although bounds-checked, attr_ptr provenance depends on head which may be derived from REE-parsed template.", 'Copies size bytes from attr_ptr (TA-private attribute storage) into attr (caller stack buffer) — dest and src are TA-private but size is caller-controlled.', "Binding of destination pointer 'attr' (caller buffer &bbool) into memmove; destination origin is caller stack (TA-private) but caller-provided size may be smaller.", "Binding of source pointer 'attr_ptr' into memmove; origin determined by get_attribute_ptr and may be REE-derived or TA-owned (ambiguous).", "Copies 'size' bytes without additional runtime sanitizer here; relies on caller to have validated attr_size vs size.", 'Copies attribute bytes from attr_ptr into caller buffer attr; source may originate from object attributes derived from REE-provided templates', "Call-site binding: destination 'attr' is caller-provided buffer (here &bbool) — region is TEE-private stack at this call-site.", "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr and may reference data derived from REE input (processed into TA memory) — record as unknown/TEE-private origin.", "Performs raw memory copy of 'size' bytes; if destination in other call-sites is REE-visible, this becomes TA->REE copy and may expose TA-held data.", "Raw memory copy of 'size' bytes; when callers pass REE-visible buffers this becomes a TA->REE copy and may expose TA data.", "Call-site binding: dest 'attr' is caller buffer (e.g., &bbool in get_bool) and src 'attr_ptr' is attribute storage pointer; copies size bytes from attr_ptr into attr.", 'Copies size bytes from attr_ptr into attr; size originates from get_attribute_ptr and may reflect untrusted/unknown provenance without stronger validation of attr_ptr', 'Call-site binding: dst (&bbool) is caller-local TA buffer, src (attr_ptr) originates from attribute storage (TA-private) returned by get_attribute_ptr', "copies 'size' bytes from attr_ptr (origin from get_attribute_ptr) into caller buffer attr relying on size without revalidating attr_ptr provenance", "Dest is caller stack buffer (&bbool, TA-local) while src attr_ptr provenance comes from get_attribute_ptr (may be REE-influenced); copy length 'size' derived from metadata", "Copies 'size' bytes from attr_ptr (obtained from get_attribute_ptr, potentially REE-derived) into caller buffer 'attr' relying on earlier check; if attr_size was NULL or check bypassed, destination may be undersized.", "Call-site binding: destination 'attr' is caller-owned buffer (&bbool) in TA stack/local", "Copies 'size' bytes from attr_ptr (origin resolved by get_attribute_ptr) into dest; src provenance and size bounds rely on upstream checks", "copies 'size' bytes from attr_ptr (derived from head, possibly REE-supplied) into caller buffer attr; size originates from get_attribute_ptr and may be attacker-controlled", "Performs raw copy from src to dest using size 'size' without validating provenance of src/size beyond upstream checks; if src or size are attacker-controlled this can copy unexpected data or overflow caller buffers.", "Call-site binding: destination 'attr' aliases caller stack buffer (&bbool) which is TA-private.", "Call-site binding: source 'attr_ptr' may point into data derived from 'head' (which can be REE-originated), so src region is unknown/possibly REE-visible.", "Copies attribute bytes from attr_ptr (sourced from parsed attributes) into caller buffer 'attr'; source likely originates from REE-parsed data.", 'attr (caller buffer) is destination for copy from attr_ptr which was obtained from head derived from REE templates; alias binds caller dest to origin', "Destination 'attr' is caller-supplied buffer (often TA-local like &boolval) receiving bytes from attr_ptr which may originate from object attributes; alias/binding recorded.", 'copies size bytes from attr_ptr (TA-internal) into caller-supplied attr buffer; binding dest to caller-local buffer', "copies 'size' bytes into attr without guaranteed destination bounds when attr_size is NULL or mismatched", "Copies attribute payload from attr_ptr (TA-private attribute storage) into caller buffer 'attr' (TA-local); correctness depends on get_attribute_ptr validation", "Call-site binding: dst 'attr' (caller buffer) receives data from attr_ptr within template; both are TEE-private buffers."]

ルール: other, weak_input_validation

['TEE_MemMove(attr, attr_ptr, size);', 'if (attr) TEE_MemMove(attr, attr_ptr, size);', 'if (attr)\n\tTEE_MemMove(attr, attr_ptr, size);', 'call-site: rc = get_attribute(head, attribute, &bbool, &size); -> TEE_MemMove(attr, attr_ptr, size)', 'attr_ptr obtained via get_attribute_ptr(...) then used in TEE_MemMove']
other MEDIUM

関数: ['TEE_MemMove', '=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220

フェーズ: ['unknown']

詳細: ['Reads client-provided attribute header into local cli_head via memmove; source may be REE-visible', 'parses lengths from head->attrs_size and cli_head.size to bound loop and compute len without strong validation of attrs_size/cli_head.size', 'copies cli_head from cur and then uses cli_head.size to compute len; size derived from memory without extra validation', 'Parses cli_head from cur and uses cli_head.size to compute len without strong validation of cli_head.size relative to remaining buffer.', 'Copies header from cur via TEE_MemMove without verifying remaining bytes; header.size influences subsequent parsing', 'Copies cli_head from cur without explicit remaining-bytes check; cli_head.size then used to advance and parse entries.', 'Copies cli_head from cur for parsing; subsequent len uses cli_head.size to advance parsing pointer.', 'Copies client-supplied serialized attribute header into cli_head; source comes from cur computed from head and can affect next length computations', "Copies cli_head from 'cur' into local structure; source is parsed serialized data so origin may be untrusted.", 'Copies cli_head from cur then uses cli_head.size to compute len without validating cli_head.size bounds', 'Copies cli_head from cur and then uses cli_head.size to compute len without additional validation; malformed size could affect subsequent reads.', 'Copies cli_head from cur into local header; subsequent use of cli_head.size influences loop offsets and pointer arithmetic based on possibly untrusted data.', 'Copies cli_head from cur (parsed bytes) into local structure and then uses cli_head.size to compute len without explicit validation against remaining buffer', 'Reads cli_head header from cur (head buffer) into local cli_head using sizeof(cli_head) without revalidating remaining bytes', 'Copies cli_head header from cur (from head buffer) into local struct and then uses cli_head.size to advance/size entries without validating bounds', 'Copies cli_head from cur (parsed from head) into local structure using sizeof without explicit remaining-bytes check beyond loop bounds', "Copies cli_head from 'cur' (untrusted) into local cli_head and then uses cli_head.size for length calculations without explicit validation", 'Copies cli_head from cur and then uses cli_head.size to compute len; trusting unvalidated size field from blob can lead to out-of-bounds', 'Copies client-supplied attribute header from template into local cli_head; source may be REE-derived template memory.', 'Copies cli_head from cur and uses cli_head.size to set len without validating remaining bytes', 'Destination &cli_head is local stack; memmove writes parsed header into local struct.', "Source 'cur' reads from template buffer; parsed size influences subsequent logic.", 'Copies cli_head from cur into local struct without explicit check that remaining bytes >= header size.', 'Reads cli_head from cur (refers to serialized client data) without per-entry pre-checks; cli_head.size used to advance len.', 'Copies client-supplied attribute header from ref location into local cli_head; used length cli_head.size influences subsequent parsing', 'Copies client-provided attribute header bytes into local cli_head from cur; src is parsed buffer and could be attacker-controlled', 'Copies attribute header from cur into local cli_head; cur originates from serialized buffer possibly from REE', 'Copies client-provided header from cur into cli_head on stack; cur may be from shared buffer', "Copies bytes from 'cur' into local cli_head; 'cur' likely references serialized input region (unknown), destination is stack-local.", "Call-site binding: destination &cli_head is a stack-allocated struct receiving data from 'cur' (serialised input) which may originate from REE; dst is TA-private.", "Copies serial header bytes from 'cur' into local cli_head via TEE_MemMove; source 'cur' may be REE-originated serialized input (shared).", 'Copies serial header from potentially REE-originated buffer into local cli_head; serialized input provenance may be untrusted.', "alias of destination '&cli_head' bound to local struct on stack; copies from 'cur' (serial buffer) into local header", "Copies header from serial buffer 'cur' (likely REE-originated) into TA stack-local cli_head; caller ensures len calculations but serial buffer provenance is REE-visible.", "Call-site copies a header from serialized input ('cur') into a local struct; source 'cur' originates from serial buffer (REE-visible) and is aliased into local TEE memory", 'Copies serialized header from cur (likely serialized REE/TA source) into local cli_head; origin of cur may be shared or internal depending on parsing path.', 'Copies serialized header bytes from cur (possibly REE-provided serial buffer) into local cli_head via fixed-size memcpy', "Call-site binding: dest '&cli_head' is local stack, src 'cur' is buffer parsed from serialized input (caller-controlled); copies fixed sizeof(cli_head).", 'Copies sizeof(cli_head) from cur into stack cli_head where cur is derived from head (which may be REE-supplied); relies on surrounding loop bounds to be correct', 'Copies attribute header from cur (derived from head which may be REE-supplied) relying on loop bounds; insufficient per-item validation of cli_ref.size before using it to advance len.', 'Copies sizeof(cli_head) from cur which is derived from head buffer (client-supplied); cli_head.size later used without separate validation here', 'reads header from cur into cli_head using sizeof(cli_head) where cur is derived from head (which may be REE-supplied); size field subsequently used to advance loop', "Copies header from 'cur' (parsed from head buffer) into local cli_head using fixed sizeof(cli_head) without validating remaining bytes against cli_head.size first", 'Copies sizeof(cli_head) bytes from cur (derived from head, which may be REE-supplied) into local cli_head without additional per-field validation beyond loop bounds.', "Call-site binding: destination '&cli_head' is local stack structure receiving bytes from 'cur' (parsed input)", 'copies attribute header from cur (within head derived from REE) into local cli_head and uses returned cli_head.size to advance parsing without extra validation', "Parses client attribute header by copying from serial buffer 'cur' into local cli_head; 'cur' originates from REE-provided serial data.", 'Copies serialized attribute header from cur into local cli_head; dest is local stack, src is parsed buffer', "Copies from 'cur' (pointer into template buffer allocated from serial args which is derived from REE data) into local cli_head; source may contain REE-derived content.", 'Copies attribute header from template (which may be derived from REE-serialized data) into local cli_head; template provenance includes REE-provided serial buffer.', 'copies sizeof(cli_head) from cur (derived from head which may be REE-supplied) into local cli_head', 'Reads cli_head from cur which points into parsed attribute buffer (originates from caller-supplied head/template)', "Call-site binding: copies into local cli_head from 'cur' (template region) on stack; source is template memory.", 'destination &cli_head is a local/TEE-private buffer receiving data from cur (region derived from head); binding of dst to caller origin', 'copy from cur uses sizeof(cli_head) while loop bounds use head->attrs_size; cli_head.size then used to compute len without stronger validation', 'parses cli_head.size from unvalidated buffer and uses it to compute len and advance cur without ensuring sufficient remaining bytes for each copy.', "Copies header from potentially REE-influenced buffer 'cur' into TA stack cli_head; length used without verifying remaining bytes at call-site", 'cli_head.size (from REE-derived template) is used to compute len and drive the loop without strict upper bounds validation', 'Copies header from parsed stream without verifying remaining bytes; header.size then used to drive parsing.']

ルール: other, weak_input_validation

['TEE_MemMove(&cli_head, cur, sizeof(cli_head));', 'TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:221

フェーズ: ['unknown']

詳細: ['Uses cli_head.size (from unvalidated header) to compute len and advance loop, enabling OOB or infinite loop if header is malicious', 'Uses cli_head.size to compute len and advance loop, enabling mis-parsing or OOB if header is malicious.', 'Uses cli_head.size (from unvalidated header) to compute len and advance loop, enabling OOB or infinite loop if header is malicious.', "Uses cli_head.size (unvalidated) to compute loop advance 'len', enabling OOB or logic issues if malicious."]

ルール: weak_input_validation

['len = sizeof(cli_head) + cli_head.size;']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:235

フェーズ: ['unknown']

詳細: ['get_bool asserts rc == PKCS11_CKR_OK after get_attribute; if get_attribute returns BUFFER_TOO_SMALL the assert can trigger, causing an availability issue.']

ルール: other

['rc = get_attribute(head, attribute, &bbool, &size); if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:236

フェーズ: ['unknown']

詳細: ['get_bool asserts rc == OK after get_attribute; if attribute parsing originates from REE, relying on assert may be insufficient validation.']

ルール: weak_input_validation

['if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241

フェーズ: ['unknown']

詳細: ['Asserts rc == OK after get_attribute; if attribute data originate from REE parsing, relying on assert may be insufficient validation.', 'get_bool asserts on unexpected rc values (other than NOT_FOUND and OK), which could lead to TA abort if callers receive BUFFER_TOO_SMALL.', 'get_bool asserts rc == PKCS11_CKR_OK after calling get_attribute; if get_attribute returns BUFFER_TOO_SMALL an assert can crash (DoS).']

ルール: weak_input_validation, other

['if (rc == PKCS11_RV_NOT_FOUND)\n    return false;\n\nassert(rc == PKCS11_CKR_OK);', 'if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);', 'rc = get_attribute(head, attribute, &bbool, &size);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244

フェーズ: ['unknown']

詳細: ['get_bool uses assert(rc == PKCS11_CKR_OK) for unexpected error codes which may abort the TA instead of graceful error handling.']

ルール: weak_input_validation

['assert(rc == PKCS11_CKR_OK);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265

フェーズ: ['unknown']

詳細: ['Copies referenced attribute header into local pkcs11_ref from ref_attr which may be in REE-managed memory', 'Copies pkcs11_ref from ref_attr (origin of ref_attr unclear); if ref_attr is attacker-controlled, header fields may be tainted.', 'Copies pkcs11_ref from ref_attr into local pkcs11_ref; ref_attr provenance may be caller-controlled serialized data.', 'Copies pkcs11_ref from ref_attr into local struct; ref_attr provenance may be internal or external depending on call-site (used for reference comparisons).', 'Copies pkcs11_ref from ref_attr (external data) into local structure and uses its size fields for subsequent checks', 'Copies pkcs11_ref header from ref_attr (reference buffer) into local pkcs11_ref; origin of ref_attr may be REE or TA-managed depending on caller', 'Copies pkcs11_ref from ref_attr into local struct; ref_attr provenance may be untrusted and size used later without full validation', 'Copies pkcs11_ref from ref_attr (reference data) into local pkcs11_ref without validating ref_attr length here', 'Copies pkcs11_ref from ref_attr (source from caller) into local header for reference checks; binds callee params to caller-origin', 'Copies serialized attribute header from ref_attr into pkcs11_ref (local); ref_attr may point into REE-origin template.', 'Copies pkcs11_ref from ref_attr (possibly REE-origin) into local structure for further processing', 'Destination &pkcs11_ref is local; writing ref header into stack from ref_attr source.', "Source 'ref_attr' is derived from caller data (possibly template/ref buffer); origin considered TEE-private here.", 'Copies pkcs11_ref from ref->attrs without an explicit overall buffer-length check against ref->attrs_count/total bytes; malformed ref could cause out-of-bounds reads.', 'Copies pkcs11_ref from ref_attr into local struct without validating that ref->attrs contains enough bytes for header.', 'Copies header from ref_attr without validating that ref buffer contains enough bytes for the header.', 'Reads attribute header from ref_attr into pkcs11_ref and then trusts pkcs11_ref.size for further operations without extra validation', 'Copies attribute header from ref_attr into local pkcs11_ref; ref_attr provenance may be attacker-controlled', 'Copies referenced attribute header from ref_attr into local pkcs11_ref; src may be REE-derived', 'Copies reference header from ref_attr into local pkcs11_ref; source origin unknown (could be serialized input).', 'Copies reference structure from ref_attr into local pkcs11_ref via TEE_MemMove; ref_attr provenance may be untrusted input.', 'Copies reference structure from ref_attr (possibly untrusted) into local pkcs11_ref.', 'Copies ref metadata from ref_attr into local pkcs11_ref; source may be untrusted serialized data', 'Copies pkcs11_ref structure from ref_attr into local pkcs11_ref; origin of ref_attr is context-dependent (unknown)', 'Copies pkcs11_ref from ref_attr (parsed data); subsequent use of pkcs11_ref.size may be attacker-controlled if not validated', 'copies fixed-size pkcs11_ref from ref_attr into local structure; both are TA-managed in this path', 'Copies referenced attribute header from ref_attr (parsed data) into local pkcs11_ref; ref_attr is from REE-origin serial buffer.', 'Copies reference attribute into pkcs11_ref from ref_attr; source originates from parsed data', 'copies sizeof(pkcs11_ref) from ref_attr into local pkcs11_ref; ref_attr provenance may be REE-derived', 'Copies pkcs11_ref from ref_attr (pointer into parsed data) into local pkcs11_ref; source likely from parsed/REE-provided buffer', 'Call-site binding: copies pkcs11_ref from ref_attr (likely from serialized template region) into local pkcs11_ref.', 'destination &pkcs11_ref is local and receives bytes from ref_attr (origin region tied to head/cur)', 'Copies reference structure from ref_attr into local pkcs11_ref; origin of ref_attr is parsed data (unknown)', 'Copies pkcs11_ref from ref_attr using sizeof(pkcs11_ref) without an explicit overall bounds check against ref->attrs total bytes; a malformed ref can cause out-of-bounds read.', "Call-site binding: destination '&pkcs11_ref' is a local TA stack object (TEE-private) receiving data from ref_attr.", "Call-site binding: source 'ref_attr' aliases ref->attrs provided by caller (origin from req_attrs); origin considered TA-private but upstream provenance varies.", 'Call-site bindings: ref_attr aliases ref->attrs provided by caller; pkcs11_ref is local TA storage receiving the copy.']

ルール: other, weak_input_validation

['TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:298

フェーズ: ['unknown']

詳細: ['Copies pkcs11_ref from ref_attr (caller-supplied reference); subsequent get_attribute_ptr uses pkcs11_ref.id/size influencing control flow.', 'Copies pkcs11_ref from ref_attr (possibly REE-originated serialized ref) into local header; ref_attr size influences subsequent attribute lookups', 'Copies pkcs11_ref from ref_attr into local structure before using id/size to fetch attributes; malformed input can influence control flow.', 'Copies pkcs11_ref from ref_attr prior to querying attribute pointer; the ref structure guides subsequent attribute lookup and may be attacker-influenced.', 'Copies pkcs11_ref from ref_attr then uses pkcs11_ref.id/size to look up attributes; ref_attr provenance may be untrusted', 'Copies pkcs11_ref from ref_attr into local struct before using its id/size; ref_attr provenance varies by caller', 'Copies pkcs11_ref from ref_attr into local struct before using pkcs11_ref.id/size for lookups; ref_attr may be attacker-controlled', 'Copies pkcs11_ref from ref_attr into local pkcs11_ref before using id/size to fetch attribute pointers; ref_attr provenance may be untrusted', 'Copies pkcs11_ref from ref_attr into local struct before using its id/size to lookup attributes; source may be attacker-controlled', 'Copies referenced attribute header from ref_attr into local pkcs11_ref prior to lookup; source origin may be untrusted serialized data.', 'Copies pkcs11_ref header from ref_attr before using its id to query attributes; relies on integrity of ref_attr contents', 'Destination &pkcs11_ref is local; callee writes header from ref_attr.', "Source 'ref_attr' originates from caller context; treated as TEE-private here.", 'Copies header from ref_attr into pkcs11_ref and then uses its id/size for a lookup without validating ref_attr provenance', 'Copies attribute header from ref_attr into local pkcs11_ref before further parsing; source region uncertain', 'Copies referenced attribute header into local pkcs11_ref before resolving value; source may be untrusted', 'Copies reference header into local pkcs11_ref; source is ref_attr (unknown origin).', 'Copies ref metadata from ref_attr into local pkcs11_ref at alternate codepath; source provenance may be REE-visible', 'copies fixed-size pkcs11_ref from ref_attr into local structure before lookup; origin likely TA-private', 'Copies referenced attribute header from ref_attr into pkcs11_ref for subsequent get_attribute_ptr; source likely REE-origin.', 'Copies reference attribute into pkcs11_ref from ref_attr (similar parsing path)', 'copies sizeof(pkcs11_ref) from ref_attr into pkcs11_ref at another call site; binding shows ref_attr origin', 'Copies pkcs11_ref from ref_attr into local structure before using it to index attributes; relies on validity of ref_attr/size', 'Call-site binding: similar copy of pkcs11_ref from ref_attr into local; used to lookup attribute pointer next.', 'destination &pkcs11_ref is local and source ref_attr derives from parsed head data', 'Copies reference structure from ref_attr into local pkcs11_ref at another call-site; source provenance unclear']

ルール: other, weak_input_validation

['TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344

フェーズ: ['unknown']

詳細: ['Copies prefix string from prefix (possibly REE-origin) into local prefix2 buffer without explicit max bound beyond prefix_len', 'copies prefix into prefix2 using prefix_len+1; if prefix_len derived from unvalidated source this may overflow prefix2', 'Copies prefix into preallocated buffer using prefix_len+1 provided by caller; binding of src/dst origins recorded', 'Copies prefix string into prefix2 using prefix_len+1; must ensure prefix_len is valid to avoid overflow.', 'Copies prefix into prefix2 using prefix_len computed elsewhere; dest buffer and prefix_len must be consistent to avoid overflow', 'Copies prefix string into prefix2 buffer using prefix_len+1; relies on prefix_len correctness and destination sizing.', 'Copies prefix bytes into prefix2 buffer; boundaries depend on prefix_len computed earlier — ensure prefix_len is validated before copy.', 'Copies prefix into prefix2 (both likely TA buffers); operation appears internal and not REE-driven but still performs raw memory copy.', 'Copies prefix bytes into prefix2 using prefix_len provided by caller; caller must ensure prefix_len bounds, otherwise memory corruption possible', 'Copies prefix bytes into preallocated prefix2 buffer; caller must ensure prefix_len+1 fits destination to avoid overflow', 'Copies prefix+1 bytes into prefix2 based on prefix_len computed earlier; source origin not validated here and destination sizing must be ensured by caller', 'Copies prefix bytes into prefix2 using prefix_len+1 as length; origin/provenance of prefix is unclear and prefix2 size assumptions not shown here', 'Copies prefix into caller-provided prefix2 buffer; dest provenance depends on caller and length calculation uses prefix_len', 'Copies prefix bytes into prefix2 buffer; length derived from prefix_len may allow out-of-bounds if prefix_len incorrect.', 'Copies prefix string into prefix2 buffer using prefix_len+1; depends on caller-provided prefix_len being correct', "Destination 'prefix2' is TA-allocated buffer; writes prefix bytes into it.", "Source 'prefix' is provided by caller; origin region unknown (could be REE-visible or TA-private).", 'Copies prefix into prefix2 using prefix_len+1; destination prefix2 sized by caller must be adequate, otherwise overflow risk exists (no explicit check here).', 'Copies prefix string into prefix2 using prefix_len derived elsewhere; origin of prefix may be caller-controlled', 'Copies prefix bytes from prefix (unknown origin) into prefix2 buffer then writes padding; source size used in copy is prefix_len+1', 'Copies logging prefix into prefix2 from prefix (likely TA or REE); potential read from external buffer into local buffer', 'Copies prefix into prefix2 using prefix_len provided by caller logic; bounds depend on prefix_len check upstream.', 'Copies prefix string into prefix2 using prefix_len+1 as length; length derived earlier and used without further upper-bound here', "Call-site binding: dest 'prefix2' is TA buffer, src 'prefix' may be caller or TA data; copies prefix_len+1 bytes without additional runtime bound here.", 'Copies prefix into prefix2; both likely TA-local but length expression (prefix_len + 1) must be correct to avoid overflow', 'copies prefix (REE-provided) into prefix2 buffer using prefix_len+1 without explicit destination-size check here', 'Copies prefix into local buffer without visible destination-size check here.', 'Copies prefix string into prefix2 with length prefix_len+1 where prefix may originate from earlier data; destination is TA buffer', 'copies prefix (src) into prefix2 using prefix_len derived earlier; if prefix originates from REE, length/contents may be untrusted', "Copies prefix bytes into local prefix2 buffer from 'prefix' source; origin of 'prefix' may be caller/REE-provided.", 'Copies prefix string into prefix2; destination is caller buffer and sized by caller, then modified; potential overwrite if sizes incorrect', 'Copies prefix (source possibly caller-provided or from serial data) into prefix2 buffer; length calculation uses prefix_len which may be influenced by input.', 'copies prefix_len+1 bytes from prefix into prefix2 (both likely TA buffers); shows direct buffer copy with computed length', 'Copies prefix bytes within TA-local buffers (prefix2 <- prefix); uses prefix_len+1 as length, bounds depend on prefix_len correctness', 'Call-site binding: copies prefix string into prefix2 buffer; sizes computed with prefix_len (derived earlier).', 'destination prefix2 is local; source prefix may be from parsed data or constant, binding of src/dst at call-site', 'Copies prefix string into prefix2 buffer using prefix_len-based size; origin of prefix may be REE-influenced']

ルール: other, weak_input_validation

['TEE_MemMove(prefix2, prefix, prefix_len + 1);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352

フェーズ: ['unknown']

詳細: ['Small copy of attribute bytes into local buffer using MIN(pkcs11_ref.size, sizeof(data)); src originates from attribute blob (caller-controlled).', 'loads pkcs11_ref from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes; pkcs11_ref.size is from parsed data', 'Copies attribute header from cur into pkcs11_ref and then small sample into local data[]; uses MIN(pkcs11_ref.size, sizeof(data)) to limit copy.', 'Copies pkcs11_ref into local struct and then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes into data; pkcs11_ref.size (from serialized data) controls copy length', 'Copies header then a small sample of attribute bytes into local data[]; source is serialized object memory, destination is stack buffer, size uses MIN(parsed_size, sizeof(data)) limiting copy.', "Copies bytes from cur+sizeof(pkcs11_ref) into small local buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from parsed data and parsing relies on head->attrs_size", "Copies into small local buffer 'data' using pkcs11_ref.size derived from parsed input; parsing assumptions may be violated by malformed attrs_size.", 'Reads pkcs11_ref from cur into local structure; source is serialized data within head and may be malformed.', 'Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local buffer; pkcs11_ref.size read from serialized stream may be maliciously large or malformed.', 'Uses pkcs11_ref.size from serialized stream to bound a copy into a fixed-size local buffer; malformed size could cause logic errors or truncation/over-read concerns.', 'Copies small sample bytes from cur+header into a local data[] for logging; source is TA attribute area computed from cur and pkcs11_ref.size.', 'Copies small preview bytes from serialized attribute payload into local buffer; source pointer computed as cur + sizeof(pkcs11_ref)', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized payload into a small local buffer; relies on pkcs11_ref.size parsed from data.', 'Copies a bounded portion of serialized data into a small local buffer using MIN; relies on parsed size.', 'Copies small sample bytes from attribute payload into local data array using pkcs11_ref.size as bound; if pkcs11_ref.size is untrusted, MIN is used but initial header read may be malformed.', 'Reads pkcs11_ref header from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from the following payload; header size used to bound copy but header itself came from untrusted data', 'Copies header into pkcs11_ref from cur without rechecking remaining length; subsequent copy uses MIN(pkcs11_ref.size, sizeof(data)) but header read may be OOB', 'Copies attribute header into local pkcs11_ref from cur (head-derived); then separately copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes into stack buffer — size driven by untrusted metadata', 'Copies header and then up to MIN(pkcs11_ref.size, sizeof(data)) bytes from parsed buffer; pkcs11_ref.size originates from untrusted serialized data and influences copy length', 'Copies pkcs11_ref from cur into local variable; cur is iterating over head built from caller data and size validation relies on loop bounds and pkcs11_ref.size', 'Reads pkcs11_ref from cur via MemMove then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) without validating full bounds', 'Copies small sample bytes from attribute payload into local data buffer using MIN(pkcs11_ref.size, sizeof(data)) — reads untrusted size but bounds with MIN', 'Copies attribute header from cur into pkcs11_ref (local) while iterating template; source may be REE-derived.', 'Copies small sample bytes from cur+sizeof(pkcs11_ref) into local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size derived from untrusted data', 'Reads pkcs11_ref from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+header into data; uses untrusted size for min computation', 'Destination &pkcs11_ref is local stack; writing header from cur.', 'Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local buffer; pkcs11_ref.size originates from untrusted template bytes and used without an explicit upper-limit validation beyond MIN', "Reads attribute header then copies up to MIN(pkcs11_ref.size, sizeof(data)) into local buffer 'data' — copy is bounded by MIN which mitigates overflow.", 'Reads header from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+header; pkcs11_ref.size is attacker-controlled if cur is REE-derived and header/payload bounds not fully validated', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) from cur into local buffer; pkcs11_ref.size is attacker-controlled if head is untrusted and not validated', 'Copies pkcs11_ref.size bytes from cur into local buffer using MIN but pkcs11_ref.size itself was derived from untrusted data without prior validation.', 'Copies small sample bytes from attribute value into local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from parsed header', "Copies bytes from attribute payload into a small local buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size influences copy length", 'Reads attribute header into pkcs11_ref and then copies up to sizeof(data) bytes from following payload into local data[]; payload length is attacker-controlled via pkcs11_ref.size', 'Copies attribute header into pkcs11_ref from cur; cur may be from serialized object (untrusted), influencing subsequent size calculations', 'Copies pkcs11_ref header from cur into local structure; cur likely points into serialized buffer (caller-controlled).', 'Copies pkcs11_ref header from cur into local struct, then copies following bytes into small local buffer using MIN(pkcs11_ref.size, sizeof(data)) — header-driven length used to bound second copy', 'Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur into local data[] using size derived from parsed pkcs11_ref; if pkcs11_ref was attacker-controlled this may under/over-run without extra checks', 'Copies data with length derived from parsed pkcs11_ref.size; if pkcs11_ref is attacker-controlled this may lead to incorrect assumptions about available source bytes.', 'Copies bytes using pkcs11_ref.size derived from parsed input; size origin must be validated.', 'copies pkcs11_ref and up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur into local structures relying on pkcs11_ref.size parsed from untrusted data', 'Copies pkcs11_ref from cur into local structure without validating that cur+sizeof(pkcs11_ref) is within bounds', 'reads pkcs11_ref header from cur (parsing REE-derived blob) into local pkcs11_ref; subsequent use of pkcs11_ref.size influences other copies', "Copies pkcs11_ref from buffer 'cur' into local structure; 'cur' is parsed serial data (REE-origin).", 'Copies pkcs11_ref from cur into local structure and then copies following bytes into local data array; sources from parsed buffer', 'copies sizeof(pkcs11_ref) from cur into local pkcs11_ref; cur originates from parsed head (possibly REE)', 'Copies pkcs11_ref header from cur (parsed buffer) into local pkcs11_ref; source cur originates from parsed/REE buffer', "Call-site binding: copies pkcs11_ref from serialized buffer 'cur' into local pkcs11_ref; source is template region.", 'destination &pkcs11_ref local, source cur derives from head/serialized data', 'Copies attribute header from cur into pkcs11_ref then copies data into local small buffer; cli-provided sizes drive MIN() used for copy']

ルール: other, weak_input_validation

['TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));', 'TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));', 'TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353

フェーズ: ['unknown']

詳細: ['Extracts up to MIN(pkcs11_ref.size, sizeof(data)) bytes into small local buffer, uses MIN to limit copy', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute payload into small local array; uses MIN as safeguard.', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into local buffer; length driven by pkcs11_ref.size parsed from REE-influenced data', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into local array; size derived from serialized data affects copy length.', "Copies payload bytes into local 'data' buffer using MIN(pkcs11_ref.size, sizeof(data)); copy length derived from untrusted header but bounded by local buffer size", 'Copies payload into local buffer bounded by MIN(header.size, local_size) — bounded but header itself came from untrusted input.', 'Copies attribute bytes into fixed-size local array using MIN(pkcs11_ref.size, sizeof(data)); source pointer is cur + sizeof(pkcs11_ref) (may be REE-derived)', 'Copies attribute payload into small local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from untrusted header parsed earlier', 'Copies a small amount (MIN(pkcs11_ref.size, sizeof(data))) from attribute payload into local data[]; MIN bounds used but provenance of pkcs11_ref.size is from parsed data', "Copies a small sample of attribute bytes from parsed buffer into local 'data' array; source may be untrusted and size is constrained by MIN(...) but provenance remains untrusted", "Copies few bytes of attribute data into local small buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); source size controlled by pkcs11_ref, which is untrusted.", 'Copies attribute bytes into small local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size is attacker-controlled and earlier header read may be unsafe.', 'Destination &data[0] is local small buffer; writes up to MIN(pkcs11_ref.size, sizeof(data)) bytes from template payload.', 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) from attribute payload into local buffer; header-to-payload size relation relies on prior header validity.', "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into small local array 'data' - size is attacker-controlled leading to potential info flow or truncation", 'Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized area into local small buffer; size derived from parsed header.', 'Copies payload bytes (cur + sizeof(pkcs11_ref)) into small local buffer using MIN(pkcs11_ref.size, sizeof(data)) to limit copy', 'Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+offset into local buffer; pkcs11_ref.size comes from parsed input and must be trusted elsewhere', "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into stack buffer 'data'; pkcs11_ref.size is derived from parsed REE data and could be manipulated.", 'Copies bytes based on parsed pkcs11_ref.size (from REE) into a fixed stack buffer; though MIN is used, pkcs11_ref parsing must be robust to avoid misinterpretation.', 'copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local data; size derived from REE-parsed header', 'copies data governed by pkcs11_ref.size parsed from REE blob; parsing-bound size may be attacker-controlled', "Copies a small data fragment from serial buffer into local array 'data'; source originates from REE-provided serial stream.", 'Copies attribute payload into local data buffer using MIN(pkcs11_ref.size, sizeof(data)); size is attacker-controlled via parsed ref', 'copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into data; pkcs11_ref.size is derived from parsed input and may be attacker-controlled if not fully validated', 'copies MIN(pkcs11_ref.size, sizeof(data)) bytes where pkcs11_ref.size is attacker-controlled if parsed input not validated', "Copies small data fragment from parsed buffer (cur + sizeof(pkcs11_ref)) into local 'data' array using MIN(pkcs11_ref.size, sizeof(data))", 'Call-site binding: copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from template area into local data[] buffer.', 'destination &data[0] local, source cur+sizeof(pkcs11_ref) is within parsed buffer; length MIN(pkcs11_ref.size, sizeof(data)) used', 'Copies attribute bytes into local data[] using MIN(pkcs11_ref.size, sizeof(data)); source is parsed buffer influenced by REE']

ルール: other, weak_input_validation

['TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));']
other MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:366

フェーズ: ['unknown']

詳細: ['Copies enum rc into caller memref (REE-visible); structural binding recorded though not sensitive.']

ルール: other

['TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435

フェーズ: ['unknown']

詳細: ["Binding: copies 'ref' into local head variable; 'ref' provenance (caller buffer) not proven TEE-private", 'Copies header struct from ref into local head via memmove; ref source may be REE-managed', "Copies header 'head' from ref (likely caller-provided) into local head variable; binding shows ref origin may be REE-visible.", "copies 'head' structure from ref into local head using sizeof(head); origin of ref may be external but is used unchecked", 'Copies struct head from ref into local head; binds caller ref provenance to destination local variable', 'Copies serialized object header from ref into local head via TEE_MemMove; ref provenance impacts trust (could be TA-managed or external), caller checks follow.', 'Copies serialized head from ref into local head; if ref is attacker-controlled, head.attrs_count may be tainted and affect later logic.', 'Copies head from ref into local head; ref length must match sizeof(head) else behavior is uncertain', "Copies raw header 'ref' into local 'head'; origin of 'ref' is caller-provided data (unknown provenance), so a malformed or attacker-controlled 'ref' could influence local state.", "Copies 'head' structure from external 'ref' into local head via fixed sizeof(head); source 'ref' may be from serialized input and not strongly validated here", 'Copies serialized head from external ref into local head using fixed sizeof(head) without validating source size.', "Copies 'head' structure from ref (serialized) into local head; source serialization may be untrusted and affects attrs_count checks.", "Copies header 'head' from serialized ref into local head variable; ref buffer origin may be caller-provided serialized object", "Copies head struct from external 'ref' into local 'head' without validating origin; malformed or attacker-influenced 'ref' may affect subsequent logic.", 'Copies head struct from ref into local head; ref provenance uncertain and head.attrs_count is used later to branch.', "Copies 'head' from ref (serialized header) into local head without validating ref length first", 'Copies head struct from ref into local head via sizeof(head); ref provenance may be REE or TA-managed', 'Copies serialized head from ref into head local via fixed-size copy; ref provenance may be untrusted and head.attrs_count used later', 'Copies head from ref into local head via sizeof(head); ref provenance may be external and no explicit length check is visible here', "Copies 'head' from ref into local head; ref originates from caller-provided data and may be untrusted", 'Copies serialized head from ref into local head via fixed-size move; if ref is attacker-controlled this aliases attacker data into head fields', "Copies serialized header 'head' from ref into local head variable; ref may be REE-derived leading to untrusted content in local structure.", "Copies head structure from ref into local 'head' using sizeof(head); correctness assumes ref contains a valid head", "Destination &head is local; memmove reads 'ref' into local head struct.", "Copies 'head' struct from ref without validating that ref points to a buffer of sufficient length before reading head.attrs_count/attrs_size.", "Copies into 'pre' which is set to NULL earlier; destination is invalid leading to memory-safety issue (caller misuse), origin of ref may be REE or TA", 'Copies struct head from ref into local head and then indexes head.attrs_count; ref provenance not validated here', "Copies serial object head from 'ref' into local head structure; source may be untrusted buffer", 'Copies head from ref into local head; ref likely points into serialized object buffer whose provenance is upstream', 'Copies head structure from ref into local head; source may be serialized external data, binding untrusted src into TA-local struct', "Copies header from ref into local head; source 'ref' origin unknown (could be REE or TA-owned).", "Copies header 'head' from ref into local head via fixed-size MemMove; source ref may be untrusted", 'Copies head from ref; origin of ref may be external and head.attrs_count used later—binding reflects potential external influence', 'copies ref into head structure; origin of ref may be external and head used afterwards without additional validation', "Copies 'head' struct from ref (source unknown) into local head; origin of ref may be REE-influenced and head used to drive loops", 'copies head structure from ref into local head; both are likely TA-managed at this call-site', "Copies head structure from ref pointer into local 'head'; ref likely points into REE-origin serialized attributes.", 'Copies head from ref into local head variable; ref originates from parsed attribute list', 'copies sizeof(head) from ref into head (binding of destination to local head from ref source)', "Copies 'head' structure from ref into local head variable; correctness depends on validity of ref and size of head", "Call-site binding: copies 'ref' into local 'head' structure; origin of 'ref' uncertain (could be REE-provided serialized data).", 'destination &head is local and receives bytes from ref (origin tied to caller-provided head/new buffers)', 'Copies head structure from ref (unknown provenance) into local head variable; caller-supplied ref may be untrusted']

ルール: other, weak_input_validation

['TEE_MemMove(&head, ref, sizeof(head));']
other MEDIUM

関数: ['=', 'TEE_MemMove', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447

フェーズ: ['unknown']

詳細: ['Binding: copies prefix (caller-provided) into pre buffer which may be uninitialized; origin of prefix is external', 'Copies prefix into pre buffer before logging; pre may point into TEEspace but prefix provenance uncertain', 'Copies caller-supplied prefix into pre buffer via TEE_MemMove; origin of pre and prefix may be caller-controlled leading to potential overflow if not validated', 'copies prefix into pre using strlen(prefix) without showing allocation of pre here; destination origin/size unclear (potential overflow)', 'Copies prefix (caller-provided) into pre buffer before logging; records aliasing of caller buffer into local logging buffer', 'Copies prefix string into pre buffer using strlen(prefix) without explicit check of pre capacity at this site (caller must ensure buffer is large enough).', 'Copies prefix into pre buffer for logging; ensure pre is allocated and prefix length sane to avoid overflow or information leak to logs.', "Copies prefix into pre buffer (dest) using strlen(prefix) as length; origin and size of 'pre' not validated here (caller must ensure buffer large enough).", 'Copies prefix into pre buffer using strlen(prefix); source prefix may be attacker-influenced affecting length used', 'Copies prefix into pre buffer (dest) using strlen(prefix) length; dest origin and size must be ensured by caller (potential risk if pre not allocated appropriately)', "Copies prefix into 'pre' which may be a logging buffer; source 'prefix' provenance is uncertain (could be REE-originated), so copy may move untrusted data into TA memory or vice versa depending on caller.", "Copies prefix into 'pre' buffer; source 'prefix' provenance is unclear and destination 'pre' may be TA stack/buffer — length uses strlen(prefix) without explicit destination size here.", 'Copies prefix string into pre buffer using strlen(prefix) without verifying pre capacity here; caller must ensure pre is allocated and large enough', 'Copies prefix into pre buffer before logging; source may be caller-provided and length computed via strlen, rely on prefix validity.', 'Copies strlen(prefix) bytes from prefix (caller-provided) into pre; prefix origin may be REE-visible and length unchecked relative to pre capacity.', 'Copies caller-provided prefix into pre without ensuring pre capacity relative to strlen(prefix).', 'Copies prefix string into pre buffer using strlen(prefix); destination pre may be uninitialized if allocation failed elsewhere', 'Copies prefix into pre buffer before logging; origin and size of pre must be valid to avoid overwrite or logging of untrusted data.', 'Copies prefix into pre buffer before logging; source may be external but the copy itself is an internal memory move used for message composition.', 'Copies prefix bytes into pre using strlen(prefix) (caller-controlled); if pre is NULL or undersized this may cause crash', 'Copies prefix into pre buffer using strlen(prefix) without verifying destination pre size; if prefix is REE-controlled this can overflow', 'Copies strlen(prefix) bytes into pre without shown bounds check; prefix origin may be untrusted leading to potential overflow or unexpected reads', "Copies caller-supplied prefix into 'pre' without verifying pre is non-NULL or large enough here (caller responsibility), creating a potential overwrite or crash", 'Copies prefix into pre using strlen(prefix) bytes; pre destination must be valid and prefix provenance unclear here', 'copies prefix (caller-provided) into pre buffer; binding of pre/prefix origins may be REE or TA depending on caller, risk is aliasing of shared buffers', "Copies prefix into pre buffer before printing; dest 'pre' may be uninitialized if allocation failed—possible sink of unverified memory", 'Copies prefix into pre buffer without explicit bounds check on pre length (caller must ensure pre has space)', "Copies prefix bytes into pre buffer prior to logging; destination 'pre' may be uninitialized leading to potential memmove into invalid memory.", 'Copies a prefix string into pre (caller-provided); origin of pre and prefix may be REE-derived or set earlier—potential aliasing of shared buffer into logging output', 'Copies prefix into pre buffer before logging; depends on prefix buffer being large enough', "Destination 'pre' is local buffer expected to be provisioned; writing prefix bytes into it may overflow if 'pre' not sized correctly.", 'Copies prefix into pre without validating destination capacity here; caller must ensure pre allocated large enough.', 'Copies prefix into pre without validating pre capacity at this site.', 'Copies prefix into pre buffer; destination origin and size not validated here (caller must ensure pre is large enough)', 'Copies prefix into pre using strlen(prefix) without ensuring pre buffer size; pre originates from caller and may be NULL if not allocated.', 'Copies prefix into pre (pre may be uninitialized/NULL) using strlen(prefix) as length; destination origin/size not validated', 'Copies prefix into pre (buffer) for logging; length uses strlen(prefix) which relies on prefix being NUL-terminated', "Copies prefix string into 'pre' buffer; source 'prefix' provenance unclear (possibly REE), and length uses strlen(prefix) without explicit dst size here", 'Copies prefix into pre buffer prior to logging; prefix provenance uncertain and length uses strlen(prefix)', 'Copies prefix into pre (caller-provided buffer) using strlen(prefix) without explicit dst bounds here; destination origin at call-site determines risk.', 'Copies prefix into pre buffer for logging; src may be external and length determined by strlen(prefix) without explicit dst bounds here', "Copies prefix into 'pre' buffer; 'pre' may be REE-visible or TA-owned depending on earlier allocation—origin uncertain.", "Copies prefix into pre using strlen(prefix) without explicit bounds here; if pre's allocation is attacker-controlled or insufficient this may overflow.", 'Copies prefix into pre using strlen(prefix) without explicit local bounds here; potential overflow if pre not sized appropriately', "alias of destination 'pre' bound to local pointer derived earlier; copies prefix (possibly REE-originated) into pre without explicit bounds here", 'Copies prefix (potentially REE-originated) into local buffer without an explicit bounds check at this site.', 'Copies prefix into pre buffer using strlen(prefix) as length; length computed from prefix which may be unbounded relative to pre', "Call-site binding: dest 'pre' may be TA buffer, src 'prefix' origin unclear (could be caller-provided); copies strlen(prefix) bytes which is caller-controlled length.", 'Copies prefix bytes into pre using strlen(prefix) as length; origin of prefix may be untrusted and dst buffer pre provenance/size not shown here', 'Copies prefix using strlen(prefix) into pre where pre buffer provenance/size is not shown here.', 'Copies prefix into pre; prefix may be caller-controlled and length computed by strlen(prefix) should be validated against pre buffer size', 'copies prefix into pre buffer using strlen(prefix) where prefix may be REE-supplied; destination size not evident here', 'Copies prefix into pre for logging; source prefix may be caller-controlled leading to potential oversized copy if prefix length miscomputed', 'Copies strlen(prefix) bytes from prefix (caller-provided) into pre without ensuring pre has adequate size; origin of prefix may be REE-visible.', "Copies prefix bytes into pre using strlen(prefix) without clear bounds on pre's size at this callsite.", 'copies prefix into pre using strlen(prefix) bytes; if prefix pointer originates from REE, length and contents are attacker-controlled', "Copies prefix into 'pre' buffer using strlen(prefix); destination 'pre' origin/size not validated here — potential unsafe write if pre not sized.", "Copies prefix into buffer 'pre' using strlen(prefix) without validating destination size here.", 'Copies prefix into pre buffer for logging; if prefix is attacker-controlled this could lead to unexpected logging content or overflow if pre is undersized', "Copies 'prefix' into 'pre'; source 'prefix' may be external/REE-derived and is used untrusted in logging path.", 'copies strlen(prefix) bytes into pre (pre may be TA buffer but prefix provenance could be REE); binds prefix source to destination pre', 'Copies prefix into pre buffer before logging; prefix provenance uncertain (could be caller-provided), bounds depend on strlen(prefix)', "Call-site binding: copies prefix into 'pre' buffer before logging; origin of prefix uncertain, may be external.", 'destination pre (likely buffer) receives prefix bytes; binding of prefix source to origin shown at call-site', 'Copies prefix into pre buffer for logging; prefix origin may be untrusted leading to log injection risk']

ルール: other, weak_input_validation

['TEE_MemMove(pre, prefix, strlen(prefix));', 'if (prefix) TEE_MemMove(pre, prefix, strlen(prefix));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:1188

フェーズ: ['unknown']

詳細: ["Binding: 'head' parameter receives 'head' (local attributes list) from caller context; origin is TEE-private.", "Binding: 'attr' parameter receives &bbool (local stack variable); callee will write into caller's stack memory.", "Binding: 'attr_size' parameter receives &size (local) controlling buffer size checks inside callee."]

ルール: other

['rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size);']
other MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:1237

フェーズ: ['unknown']

詳細: ['Generic pattern: copying into caller-provided buffers can move TA-private or REE-originating data depending on call-site; sizes may be derived from untrusted sources at some sites.', 'Call-site binding (representative): copying local handle into caller-visible out buffer in object.c uses TEE_MemMove to write into REE-visible memory']

ルール: other

['TEE_MemMove(dest, src, n);', 'TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:1528

フェーズ: ['unknown']

詳細: ["Binding callee parameter 'head' to caller-provided obj_attrs; attributes derive from REE-provided templates so content is REE-influenced though stored TA-side"]

ルール: other

['return get_bool(head, PKCS11_CKA_PRIVATE);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2134

フェーズ: ['unknown']

詳細: ['Binding of callee params from caller: &boolval and &boolsize passed; origin of obj->attributes traces to earlier REE-derived object data.']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE, &boolval, &boolsize);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2140

フェーズ: ['unknown']

詳細: ['Binding of callee params from caller: &boolval and &boolsize; underlying attributes may originate from REE buffers.']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE, &boolval, &boolsize);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2179

フェーズ: ['unknown']

詳細: ['alias of obj->attributes passed into get_bool; origin is object metadata (TA-private) but may reflect earlier REE-provided templates']

ルール: other

['return get_bool(obj->attributes, attr->id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2259

フェーズ: ['unknown']

詳細: ['Binding of callee params from caller: &boolval and &boolsize used to retrieve PKCS11_CKA_TRUSTED from obj->attributes (caller-influenced).']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2380

フェーズ: ['unknown']

詳細: ['Reads attribute header into cli_ref and uses cli_ref.size to compute len without proving header+size <= end.']

ルール: weak_input_validation

['TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2456

フェーズ: ['unknown']

詳細: ['Binding of callee params from caller: &key_length and &size passed; key length attribute originates from caller-constructed attrs.', "Call-site binding: 'head' parameter aliases *head (template-derived attributes) which may originate from REE-supplied data", "Call-site binding: 'attr' parameter (&key_length) is TA-local destination for retrieved size", "Call-site binding: 'attr_size' parameter (&size) is TA-local and used for bounds reporting/checking"]

ルール: other

['rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite):2414

フェーズ: ['unknown']

詳細: ['alias of head (attributes list) passed into get_bool; head was derived from template which originally came from caller-supplied memref (REE-visible)']

ルール: other

['if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite):2423

フェーズ: ['unknown']

詳細: ['alias of obj->attributes passed into get_bool at parent_priv check; obj is TA-managed but derived from earlier handle lookup']

ルール: other

['bool parent_priv = get_bool(obj->attributes, cli_ref.id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite):2424

フェーズ: ['unknown']

詳細: ['alias of head passed into get_bool to obtain obj_priv; head originated from template derived from REE-provided data']

ルール: other

['bool obj_priv = get_bool(head, cli_ref.id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1164:1164

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.", "Call-site binding: 'token' argument originates from session->token earlier (influenced by REE-derived session handle); origin influences DB filename resolution.", "Call-site binding: 'out_hdl' argument is &db_hdl (local handle); callee will populate a TEE object handle (TEE-private)."]

ルール: other

['update_persistent_db(token);', 'res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1175:1175

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1183:1183

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1223:1223

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1234:1234

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1242:1242

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/close_ck_session (call site):693

フェーズ: ['unknown']

詳細: ['obj pointer from session->object_list (TA-private) is passed into destroy_object; alias of internal object into helper.']

ルール: other

['destroy_object(session, LIST_FIRST(&session->object_list), true);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/close_ck_session (call site):1372

フェーズ: ['unknown']

詳細: ['obj iterator-derived pointer from sess->object_list (TA-private) passed into destroy_object; binding of iterator element into helper.']

ルール: other

['destroy_object(sess, obj, true);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/destroy_object (call site):156

フェーズ: ['unknown']

詳細: ["session->token (TA-private) passed as 'token' parameter into unregister_persistent_object; alias of internal token structure into helper.", "obj->uuid (object-internal UUID, TA-private) passed as 'uuid' parameter into unregister_persistent_object; alias of internal UUID pointer."]

ルール: other

['if (unregister_persistent_object(session->token, obj->uuid) &&']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:59

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed into open_db_file is alias of caller's token (originates from TA state possibly influenced by REE-derived token_id)."]

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:72

フェーズ: ['unknown']

詳細: ['Copies TA-local version array into caller-provided out->memref.buffer (REE-visible); bounds checked against out->memref.size', 'Binding: callee dest parameter aliases caller-provided out->memref.buffer (shared/REE-visible)', 'Binding: callee src parameter aliases local ver array (TEE-private)']

ルール: other

['TEE_MemMove(out->memref.buffer, ver, sizeof(ver));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:115

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer)."]

ルール: other

['rc = serialargs_get(args, &head, sizeof(head));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:136

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer)."]

ルール: other

['rc = serialargs_get(args, &attr, sizeof(attr));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:158

フェーズ: ['unknown']

詳細: ['alias of head passed from caller into callee; head may reference buffers originating from REE/shared memory', 'alias of attr (attr_ptr) argument from caller passed for writing; callee writes pointers into this buffer', 'alias of attr_size argument from caller passed for writing sizes; callee writes pkcs11_ref.size into it', 'alias of count pointer passed from caller; callee updates count with number of matches']

ルール: other

['get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:163

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).", 'alias of caller-provided serialargs passed into serialargs_get at another callsite (session_handle read); args originates from REE-visible buffer', "Alias of caller-provided serialargs 'args' (derived from REE memref buffer) passed into serialargs_get; reads src pointer from it (untrusted input).", "Binding callee 'out' to caller-&session_handle (TA-local) at call-site; callee writes to caller-provided out buffer."]

ルール: other, weak_input_validation

['rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:277

フェーズ: ['unknown']

詳細: ["alias of caller-provided 'head' (obj_attrs built from REE-supplied template) passed into this function; origin is REE-visible serialargs buffer"]

ルール: other

['rc = check_created_attrs_against_processing(proc_params->id, head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:281

フェーズ: ['unknown']

詳細: ["Binding of caller 'session' pointer into callee parameter; origin not proven TEE-private (could be influenced by REE path).", "Binding of caller 'head' (attributes) into callee parameter; head may originate from REE-parsed template or TA-created attrs—origin ambiguous."]

ルール: other

['rc = check_created_attrs_against_token(session, head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:327

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'args' parameter aliases a serialargs built over ctrl->memref.buffer which is REE-provided/shared buffer.", "Call-site binding: callee 'client' parameter is alias of caller 'client' (origin unclear from call-site).", "Call-site binding: callee 'sess' parameter aliases caller's local &session (TA-private output pointer).", "Call-site binding: callee 'args' parameter aliases a serialargs built over ctrl->memref.buffer (REE-provided/shared).", "Call-site binding: callee 'out' parameter aliases caller local (&session_handle), a TA-private destination."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);', 'rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:364

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'session' parameter is alias of caller-provided session pointer from entry_create_object; origin region not explicit at call-site.", "Call-site binding: callee 'head' parameter aliases attributes built earlier (origin: parsed from REE template then converted) — record as TEE-private alias of processed REE input.", "Call-site binding: callee 'head' parameter aliases attributes constructed from REE-provided template earlier; record origin as TEE-private converted from REE input.", "Call-site binding: callee 'head' parameter aliases caller's 'head' (attributes built from parsed template); origin is processed from REE input, recorded as TEE-private alias of REE-derived data."]

ルール: other

['rc = check_created_attrs_against_token(session, head);', 'rc = check_attrs_misc_integrity(head);', 'rc = check_created_attrs_against_token(session, head); // -> get_bool(head, ...)']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:366

フェーズ: ['unknown']

詳細: ['Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); structural information-flow to REE observed on different line.', 'Local return code rc is copied into params[0].memref.buffer (REE-visible); verify that no sensitive TA-private data is later written to REE here.', 'Copies local rc into caller memref (REE-visible); destination is shared but rc is non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.', 'Copies local rc into caller-provided params[0].memref.buffer (REE-visible); structural info flow to REE (rc is public/non-sensitive).', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive', 'Copies local rc value into caller-provided params[0].memref.buffer (REE-visible); rc is non-sensitive but destination is shared.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); rc is non-sensitive but operation writes into shared memory.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); structural REE-facing write recorded though rc appears non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared but data is non-sensitive status code.', 'Copies local rc into caller memref output buffer; destination is REE-visible but data is non-sensitive status code.', 'Copying local rc into caller-provided memref.buffer (REE-visible) — destination is shared though data appears non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); structural output to REE though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); structural information-flow to REE-visible memory.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc appears non-sensitive.', 'Copies local enum rc into caller-provided params[0].memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is not sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible) at end of command handling.', 'Copies local rc into caller-provided REE-visible memref.buffer; destination is shared/REE-visible though data appears non-sensitive.', 'Copies local enum rc into caller-provided REE-visible buffer; destination is shared/REE-visible which is a data-leak channel though rc is non-sensitive.', 'Copies rc into caller-provided memref.buffer (REE-visible); destination is shared but rc is non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is non-sensitive.', 'Copies local rc value into caller-provided REE-visible memref.buffer; structural link to REE output channel (non-sensitive here).', 'Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive', 'Copies local rc into caller-provided params[0].memref.buffer (REE-visible); size checked earlier but destination is shared memory.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive', 'Copies enum rc into caller-provided params[0].memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible.', 'Binding: callee dest parameter aliases caller-provided params[0].memref.buffer (shared/REE-visible)', 'Binding: callee src parameter aliases address of local rc (TEE-private)', 'Copies local rc into caller-provided params[0].memref.buffer; bounds not provably checked against sizeof(rc) at this call site in the same function path (params[0].memref.size was checked earlier but different call paths may reach here).', 'Copies local rc into caller-provided params[0].memref.buffer (REE-visible).', 'Copies local rc into caller-provided params[0].memref.buffer (shared/REE-visible destination).', 'Copies local rc into caller-provided params[0].memref.buffer (REE-visible); destination is shared though rc is non-sensitive.', 'Copies local rc into caller-provided REE-visible memref.buffer via TEE_MemMove; destination is shared/REE-visible.', 'Copies TA-local rc into caller-provided REE-visible memref.buffer via TEE_MemMove; destination is shared.', 'Copies local rc into caller-provided REE-visible buffer; structurally exposes TA state to REE (rc is non-sensitive here).', 'Copies local rc into caller-provided memref.buffer (REE-visible); structural risk recorded though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive', 'Copies rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.', 'Copies local rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); structural risk of leaking status to REE.', 'Copies local return code into caller-provided params[0].memref.buffer (REE-visible); structural risk since destination is shared memory.', 'Copies local enum rc into caller-provided memref.buffer (REE-visible); structural risk of exposing TA state to REE if semantics change.', 'Copies rc into caller-provided params[0].memref.buffer (REE-visible); structural binding from TA to REE.', 'Copies local rc into caller-provided memref.buffer (REE-visible); rc is non-sensitive but this is a structural REE write.']

ルール: other

['TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:368

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'session' parameter aliases caller's session pointer; session is a TA-side session object (TA-private).", "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin may be REE-provided template or TA-owned object attributes (ambiguous)."]

ルール: other

['rc = check_access_attrs_against_token(session, head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:377

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' parameter is alias of caller's token (TA-managed) passed into open_db_file.", "Call-site binding: '&db_hdl' is caller-local TEE_ObjectHandle passed to receive object handle."]

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:417

フェーズ: ['unknown']

詳細: ["alias of shared ctrlargs (backed by ctrl->memref.buffer from REE) passed as 'args' into function", 'client pointer passed through from caller into callee; origin not validated here', "caller supplies address of local session pointer as output parameter (&session) bound into callee 'sess'", "alias of caller-provided serialargs structure (backed by REE memref buffer) passed as 'args' into serialargs_get", "caller passes address of local session_handle as 'out' parameter into serialargs_get"]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);', 'rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:422

フェーズ: ['unknown']

詳細: ["Binding callee parameter 'args' to caller-controlled serialargs backed by ctrl->memref.buffer (shared/REE-visible); origin is shared buffer passed into helper.", "Binding callee parameter 'client' to caller-provided client (originated from tee_session2client); provenance not proven TEE-private.", "Binding callee parameter 'sess' to caller's &session (callee writes back a pointer to TA-private session), origin is TEE-private local in caller."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:425

フェーズ: ['unknown']

詳細: ["alias of caller's serialargs object (ctrlargs) originating from REE memref buffer passed into callee as args", "alias of caller's serialargs object (&ctrlargs) passed into serialargs_get; origin is REE-provided memref buffer from TA entry path", 'alias of serialargs object (ctrlargs) originating from REE memref buffer passed as args into alloc_and_get', 'orig_next (pointer into REE-controlled args->next) passed into alloc_and_get as orig_next alias', 'buf0 points to attr read from REE-controlled serialargs and is forwarded into alloc_and_get (copied into heap)']

ルール: other

['rc = serialargs_alloc_get_attributes(&ctrlargs, &pub_template);', 'rc = serialargs_get(&ctrlargs, &attr, sizeof(attr));', 'rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:429

フェーズ: ['unknown']

詳細: ['alias of caller-local pointer (&priv_template) passed as out parameter into callee']

ルール: other

['rc = serialargs_alloc_get_attributes(&ctrlargs, &priv_template);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:441

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' parameter is alias of TA-managed token from caller at this site.", "Call-site binding: '&db_hdl' is caller-local handle passed for output."]

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:447

フェーズ: ['unknown']

詳細: ["Binding callee 'session' parameter to caller session (derived in TA); origin is TA-internal but provenance from caller; treated as TEE-private.", "Binding callee 'head' parameter to caller object->attributes; attributes are TA-owned object metadata (treated as TEE-private)."]

ルール: other

['rc = check_access_attrs_against_token(session, object->attributes);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:476

フェーズ: ['unknown']

詳細: ['alias of pub_head pointer from caller passed into callee; origin is TA-created but ultimately derived from templates that may include REE-originated data', 'alias of priv_head pointer from caller passed into callee; origin is TA-created but may reference attributes sourced from REE buffers']

ルール: other

['rc = add_missing_attribute_id(&pub_head, &priv_head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:485

フェーズ: ['unknown']

詳細: ["alias of caller-provided 'pub_head' (from parsed template) passed into function; underlying bytes originate from REE serialargs"]

ルール: other

['rc = check_created_attrs_against_processing(proc_params->id, pub_head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:489

フェーズ: ['unknown']

詳細: ["alias of caller-provided 'priv_head' passed into function; originates from REE-provided template data"]

ルール: other

['rc = check_created_attrs_against_processing(proc_params->id, priv_head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:515

フェーズ: ['unknown']

詳細: ['Call-site passes ctrlargs initialized from caller memref.buffer (shared/REE-visible) into serialargs_get as args — alias of shared buffer passed into helper', 'Call-site binds callee out pointer to caller stack variable (destination is TA-private)']

ルール: other

['rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:598

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' argument originates from caller context (TA-managed).", "Call-site binding: '&db_hdl' passed to receive opened object handle (caller-local)."]

ルール: other

['res = open_db_file(token, &db_hdl);']
weak_input_validation MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:727

フェーズ: ['unknown']

詳細: ['Alias of shared REE-provided serialargs buffer passed into helper; serialargs_get reads a uint32_t handle from it (untrusted input).', "Binding callee parameter 'client' from caller; origin (tee_session2client-derived) is unclear at this call-site.", 'Output binding: caller passes &session (TA-local) as sess parameter; callee writes *sess = session.']

ルール: weak_input_validation, other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:798

フェーズ: ['unknown']

詳細: ["callee 'args' parameter aliases caller's serialargs pointing into ctrl->memref.buffer (REE-visible), allowing REE-originated bytes to drive session_handle", "callee 'client' parameter is bound from caller-provided client (origin from tee_session2client); client may be REE-derived/tainted", "callee 'sess' out-parameter binds to caller's &session (TEE-private), receiving TA-selected session pointer", "callee 'args' aliases caller serialargs pointing into ctrl->memref.buffer (REE-visible); src is derived from REE-origin bytes.", "callee 'out' parameter binds to caller's &session_handle (TA-private stack) receiving bytes from serialargs_get.", "callee 'size' argument is caller-supplied (sizeof(uint32_t)) driving copy length; size originates from call-site constant but relates to REE-provided buffer length."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);', 'rc = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:840

フェーズ: ['unknown']

詳細: ['Call-site binding: args (ctrlargs) originates from caller memref buffer (shared REE-visible) passed into serialargs_get.']

ルール: other

['rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:908

フェーズ: ['unknown']

詳細: ["Call-site binding: callee parameter 'token' is alias of caller's token (originates from TA but influenced by REE-derived token_id)."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:946

フェーズ: ['unknown']

詳細: ["alias of callee parameter 'args' bound to caller '&ctrlargs' which was initialized from ctrl->memref.buffer (REE-provided shared buffer)", "alias of callee parameter 'out' bound to caller '&object_handle' (TA-local stack variable)"]

ルール: other

['rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:955

フェーズ: ['unknown']

詳細: ["alias of caller-provided 'head' passed into function at another call-site; origin from REE-constructed attrs"]

ルール: other

['rc = check_created_attrs_against_processing(proc_params->id, head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:960

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' argument is alias of TA-managed token structure passed into callee."]

ルール: other

['if (unregister_persistent_object(token, obj->uuid) &&']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:961

フェーズ: ['unknown']

詳細: ["Call-site binding: 'uuid' argument is alias of obj->uuid from token object list (TA-owned)."]

ルール: other

['unregister_persistent_object(token, obj->uuid))']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:998

フェーズ: ['unknown']

詳細: ['caller passes &object_handle as out parameter (TEE-private) to serialargs_get; binding records origin', 'caller-provided args (&ctrlargs) originated from ctrl->memref.buffer (REE-visible); binding records shared buffer passed into serialargs_get', 'binding: caller-provided args (&ctrlargs) originated from ctrl->memref.buffer (REE-visible); shared buffer passed into serialargs_get']

ルール: other

['rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1002

フェーズ: ['unknown']

詳細: ['alias of caller-provided serialargs (ctrlargs derived from params->memref.buffer) passed into callee; origin is REE-visible shared memory', 'alias of callee out-parameter bound to &template (TEE-private) at call-site', "caller-provided 'args' (ctrlargs derived from params->memref.buffer) is passed as serialargs pointer; origin is REE-visible shared memory", 'out parameter is &attr (callee stack) bound to caller local; destination is TEE-private', 'caller-provided serialargs pointer (args) originates from REE-visible memref buffer and is passed into alloc_and_get']

ルール: other

['rc = serialargs_alloc_get_attributes(&ctrlargs, &template);', 'rc = serialargs_get(args, &attr, sizeof(attr));', 'rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1028

フェーズ: ['unknown']

詳細: ['alias of caller-provided session pointer passed into callee; session provenance includes REE-derived handle earlier in call chain', 'alias of caller-provided obj->attributes passed into callee; attributes originate from TA object but ultimately from earlier REE inputs']

ルール: other

['rc = check_access_attrs_against_token(session, obj->attributes);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1050

フェーズ: ['unknown']

詳細: ["Call-site binding: 'pin' argument originates from caller-provided buffer (REE-visible PIN).", "Call-site binding: 'salt' argument is a pointer into TA-private token DB (destination for salt).", "Call-site binding: 'hash' buffer argument is TA-private storage for PIN hash."]

ルール: other

['rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1055

フェーズ: ['unknown']

詳細: ['alias of caller session pointer passed into callee; session origin is upstream and may be tainted/unknown', 'alias of caller-provided head (attributes list) passed into callee; head was created from template derived from REE memory', 'alias of callee obj pointer passed in; obj is a TA-managed object (TEE-private) but originated from handle derived earlier', 'alias of obj pointer passed into callee; obj is TA-managed but originated from handle resolution upstream']

ルール: other

['rc = check_attrs_against_modification(session, head, obj, function);', 'if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1062

フェーズ: ['unknown']

詳細: ["Call-site binding: 'pin' argument originates from caller-provided buffer (REE-visible PIN).", "Call-site binding: 'salt' argument is a pointer into TA-private token DB (destination for salt).", "Call-site binding: 'hash' buffer argument is TA-private storage for PIN hash."]

ルール: other

['rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1083

フェーズ: ['unknown']

詳細: ['args (serialargs*) is alias of caller-controlled memref buffer initialized from REE-visible params; shared buffer passed into helper.', 'client pointer (from tee_session2client) is forwarded into callee; origin is TA-internal but tainted by caller context.', 'sess (output pointer) is caller-provided stack pointer &session; callee writes *sess = session which binds TA-private session into caller context.']

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1106

フェーズ: ['unknown']

詳細: ['serialargs struct (args) originates from caller memref buffer (REE-shared) and is forwarded into this helper; record alias binding.', 'client pointer provided by caller is forwarded into helper; origin uncertain (derived from TA entry), record binding.', 'address of caller-local session variable (&session) is passed for output; callee writes TEE-private session pointer back to caller.']

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1110

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter aliases ctrlargs initialized from caller ctrl->memref.buffer (caller REE-provided memref), so callee reads REE-visible bytes.", "Call-site binding: 'client' parameter is caller's client (origin from tee_session2client) with unclear region/provenance.", "Call-site binding: 'sess' parameter is address of caller-local 'session' (TEE-private); callee writes back a session pointer into caller space.", "Call-site binding: callee 'args' parameter aliases ctrlargs initialized from ctrl->memref.buffer (caller REE-provided memref), so callee reads from REE-visible buffer.", "Call-site binding: callee 'out' parameter is address of local session_handle (TEE-private) so callee writes parsed value into caller-local storage."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);', 'serialargs_get(&ctrlargs, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1114

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'args' parameter receives address of ctrlargs initialized from ctrl->memref.buffer (caller-controlled REE buffer)", "Call-site binding: callee 'out' parameter aliases caller stack variable '&object_handle' (TA-private destination for data parsed from REE-provided buffer)"]

ルール: other

['rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1128

フェーズ: ['unknown']

詳細: ['Caller-provided params.memref.buffer (pin) is forwarded into set_pin as new_pin; alias of REE-visible buffer recorded.']

ルール: other

['return set_pin(session, pin, pin_size, PKCS11_CKU_USER);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1134

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'head' aliases obj->attributes from caller (TA-private object attributes passed into helper).", "Call-site binding: callee parameter 'head' aliases obj->attributes from caller (TA-private object attributes passed into get_bool)."]

ルール: other

['if (object_is_token(obj->attributes) && !pkcs11_session_is_read_write(session)) {', 'return get_bool(head, PKCS11_CKA_TOKEN);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1137

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'args' parameter aliases ctrlargs initialized from ctrl->memref (caller-provided REE buffer).", "Call-site binding: callee 'client' parameter is alias of caller 'client' (origin derived from tee_session); provenance uncertain.", "Call-site binding: callee 'sess' parameter receives address of local session (TA-private destination).", "Call-site binding: 'args' parameter aliases ctrlargs initialized from ctrl->memref (caller-provided REE buffer).", "Call-site binding: 'out' parameter is address of local session_handle (TA-private destination)."]

ルール: other

['serialargs_get_session_from_handle(&ctrlargs, client, &session);', 'rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1141

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter receives address of ctrlargs (TA struct that references REE-provided buffer).", "Call-site binding: 'out' parameter is &wrapping_key_handle (TA-private destination for data copied from args buffer).", "Call-site binding: 'size' parameter is sizeof(uint32_t) (caller-provided scalar)."]

ルール: other

['rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1144

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' parameter aliases a session derived from ctrl buffer (which originates from REE), so session is REE-influenced.", "Call-site binding: 'head' parameter aliases obj->attributes which is TA-private attributes storage."]

ルール: other

['rc = check_access_attrs_against_token(session, obj->attributes);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1149

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).", "Call-site binding: callee 'out' parameter is &proc_params (TA-private pointer out on stack) passed by caller."]

ルール: other

['rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1151

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'head' parameter aliases obj->attributes (TA-private object attributes) passed from entry_copy_object."]

ルール: other

['if (!object_is_copyable(obj->attributes)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1171

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' parameter aliases session derived from caller (originates from ctrl buffer -> possible REE influence)", "Call-site binding: 'head' parameter aliases attributes built from template that originated from REE-supplied ctrl buffer", "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)", "Call-site binding: 'session' parameter aliases session derived earlier (origin traces to ctrl buffer/session lookup)", "Call-site binding: 'req_attr' (&cli_ref) aliases parsed attribute header coming from REE-supplied head buffer"]

ルール: other

['rc = check_attrs_against_modification(session, head, obj, function);', 'if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1200

フェーズ: ['unknown']

詳細: ['Call-site binding: proc_params->id (proc_id) passed from caller; origin derived from parsed ctrl args (caller-controlled).', "Call-site binding: 'function' argument forwarded from upstream (processing_func) — caller-controlled enum.", "Call-site binding: wrapping_key->attributes passed as 'head' — alias of object attributes (TA-held) but contents originate from object state; origin considered TEE-private."]

ルール: other

['rc = check_parent_attrs_against_processing(proc_params->id, function, wrapping_key->attributes);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1223

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1234

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1242

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin."]

ルール: other

['update_persistent_db(token);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1247

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' parameter aliases wrapping_key->attributes (object attributes) from caller; origin is TA object storage (TA-private).", "Call-site binding: 'attribute' parameter is a compile-time constant (PKCS11_CKA_WRAP_TEMPLATE) from caller; non-sensitive scalar.", "Call-site binding: 'attr_ptr' parameter is &req_attrs (caller local); callee may store pointer into caller variable (alias of TA-private stack/heap).", "Call-site binding: 'attr_size' parameter is &size (caller local uint32_t); callee writes size back to caller-controlled variable."]

ルール: other

['rc = get_attribute_ptr(wrapping_key->attributes, PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1250

フェーズ: ['unknown']

詳細: ["Call-site binding: 'candidate' parameter aliases key->attributes (TA-private) passed from caller.", "Call-site binding: 'ref' parameter aliases req_attrs (origin from wrapping key attribute retrieval); origin considered TEE-private."]

ルール: other

['if (!attributes_match_reference(key->attributes, req_attrs)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1256

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'head' parameter aliases key->attributes from TA object (origin TA-private attributes).", "Call-site binding: callee 'data' parameter is &key_data (TA-private out pointer) passed by caller.", "Call-site binding: callee 'sz' parameter is &key_sz (TA-private size out parameter) from caller."]

ルール: other

['rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1266

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' passed from caller; origin tied to TA session (unknown region here).", "Call-site binding: 'key_data' passed from caller; originates from TA-private key material (sensitive).", "Call-site binding: 'key_sz' scalar provided by caller-path; size influences copies.", "Call-site binding: 'out_buf' aliases caller-provided params[2].memref.buffer (REE-visible shared).", "Call-site binding: '&out_size' aliases params[2].memref.size (REE-tainted) allowing callee to read/modify REE-provided length."]

ルール: other

['rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1269

フェーズ: ['unknown']

詳細: ["Call-site binding: 'args' parameter aliases caller memref buffer (shared/REE-visible serialargs state).", "Call-site binding: 'client' parameter originates from caller (tee_session-derived); provenance is from entry and thus unclear.", "Call-site binding: 'sess' out-parameter is caller stack pointer receiving session alias; origin inside TA (callee writes *sess)."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1300

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' argument is alias of session obtained earlier in entry_ck_set_pin (TA-private origin from session store).", "Call-site binding: 'old_pin' argument aliases data parsed from caller-provided memref (shared/REE-visible buffer).", "Call-site binding: 'old_pin_size' is derived from REE-provided fields and influences internal checks."]

ルール: other

['rc = check_so_pin(session, old_pin, old_pin_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1306

フェーズ: ['unknown']

詳細: ['Caller-provided pin pointer passed to set_pin for SO; origin is REE memref buffer so binding is recorded.', "Call-site binding: 'session' argument aliases TA session object derived in caller; origin is TA-private session structure.", "Call-site binding: 'pin' argument aliases buffer read from caller params (shared/REE-visible), so new_pin originates from REE."]

ルール: other

['return set_pin(session, pin, pin_size, PKCS11_CKU_SO);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1319

フェーズ: ['unknown']

詳細: ['Caller-provided pin pointer passed to set_pin for USER; alias of shared buffer recorded.', "Call-site binding: 'session' argument aliases TA session object derived in caller; origin is TA-private session structure.", "Call-site binding: 'pin' argument aliases buffer read from caller params (shared/REE-visible), so new_pin originates from REE."]

ルール: other

['return set_pin(session, pin, pin_size, PKCS11_CKU_USER);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1468

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' argument (from entry path) passed to check_so_pin again; same aliasing risk noted earlier.", "Call-site binding: 'pin' argument aliases caller-provided buffer (shared/REE-visible) containing new PIN.", "Call-site binding: 'session' argument is alias of session handle derived earlier from REE-supplied serial args; origin region unclear but influences token DB access.", "Call-site binding: 'pin' is alias of REE-provided buffer extracted earlier (pin_size-controlled); pin is a credential and used directly in verify_pin.", "Call-site binding: 'pin_size' is REE-controlled and drives verify_pin length; insufficient additional validation of range/limits here."]

ルール: other, weak_input_validation

['rc = check_so_pin(session, pin, pin_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1487

フェーズ: ['unknown']

詳細: ["Call-site binding: 'session' argument is alias of TA-internal session object created earlier (TA-private origin).", "Call-site binding: 'pin' argument is alias of buffer extracted from caller-provided memref (shared/REE-visible origin)."]

ルール: other

['rc = check_user_pin(session, pin, pin_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1505

フェーズ: ['unknown']

詳細: ["Binding of caller 'head' pointer into get_bool parameter; origin may be REE-derived template or TA-created attrs, origin ambiguous."]

ルール: other

['rc = get_attribute(head, attribute, &bbool, &size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1560

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' parameter aliases obj->attributes (TA-private attributes), so callee reads TA-private data."]

ルール: other

['private = object_is_private(head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1584

フェーズ: ['unknown']

詳細: ["Binding of caller 'head' pointer into callee parameter; origin ambiguous (could be derived from REE template), so attribute integrity depends on upstream parsing."]

ルール: other

['rc = check_attrs_misc_integrity(head);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:1635

フェーズ: ['unknown']

詳細: ["Binding of callee 'args' to ctrlargs which was initialized from caller-provided ctrl->memref.buffer (shared/REE-visible); alias of shared buffer passed into helper.", "Binding of callee 'client' to caller 'client' whose provenance is from tee_session2client (tainted/uncertain); records aliasing origin.", "Binding of callee 'sess' to address of caller-local session variable (TA-private); callee will write session pointer back into caller storage."]

ルール: other

['rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // args binding', 'rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // client binding', 'rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // sess binding']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2102

フェーズ: ['unknown']

詳細: ['Call-site binding: proc_id argument originates from proc_params->id parsed from REE-provided ctrl buffer (caller-controlled).', "Call-site binding: 'head' argument is wrapping_key->attributes (object attributes) — alias of TA-held attributes; origin considered TEE-private."]

ルール: other

['if (!parent_key_complies_allowed_processings(proc_id, head)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2327

フェーズ: ['unknown']

詳細: ['alias of obj->attributes passed into get_bool; obj is TA-managed (origin from handle resolution) but origin provenance upstream is unknown']

ルール: other

['return get_bool(obj->attributes, req_attr->id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2340

フェーズ: ['unknown']

詳細: ["Call-site binding: 'attr' parameter (&cli_ref) aliases parsed attribute header coming from REE-supplied head buffer", "Call-site binding: 'session' parameter aliases session derived earlier (origin traces to ctrl/session lookup)", "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)"]

ルール: other

['attr_is_modifiable_secret_key(req_attr, session, obj)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2346

フェーズ: ['unknown']

詳細: ['alias of caller-provided req_attr pointer passed into callee; req_attr originates from head derived from REE-supplied buffer', 'alias of caller session pointer passed into callee; session was obtained earlier from serialargs and may be tainted/unknown', 'alias of obj pointer passed into callee; obj is TA-managed but originates from handle resolution upstream', "Call-site binding: 'attr' parameter (&cli_ref) aliases parsed attribute header derived from REE-supplied head buffer", "Call-site binding: 'sess' parameter aliases session established earlier (origin traces to ctrl/session lookup)", "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)"]

ルール: other

['attr_is_modifiable_private_key(req_attr, session, obj)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2414

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' parameter aliases 'head' constructed from client-supplied template (originates from ctrl buffer), so callee sees data derived from REE."]

ルール: other

['get_bool(head, PKCS11_CKA_TOKEN)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2423

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' argument in get_bool(obj->attributes, ...) is TA-private attributes pointer derived from object"]

ルール: other

['get_bool(obj->attributes, cli_ref.id)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2424

フェーズ: ['unknown']

詳細: ["Call-site binding: 'head' parameter aliases template-derived head (from REE) when checking PKCS11_CKA_PRIVATE"]

ルール: other

['get_bool(head, cli_ref.id)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2798

フェーズ: ['unknown']

詳細: ['alias of *pub_head passed from caller into get_attribute_ptr; origin from templates that may contain REE-derived data', 'attr_ptr (address of id1) from caller passed for writing; callee may populate pointer to data possibly backed by shared buffers']

ルール: other

['rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:2807

フェーズ: ['unknown']

詳細: ['alias of *priv_head passed from caller into get_attribute_ptr; origin from templates that may contain REE-derived data']

ルール: other

['rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);']
other MEDIUM

関数: ['array_write']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:47

フェーズ: ['unknown']

詳細: ['Writes ptr into db->ptrs[n] (array write); if db->ptrs region is attacker-controlled origin this could overwrite shared memory.']

ルール: other

['if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }']
other MEDIUM

関数: ['array_write']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:49

フェーズ: ['unknown']

詳細: ['assignment db->ptrs[n] = ptr writes caller pointer into DB array (possible aliasing of caller memory into handle table)', 'Assignment db->ptrs[n] = ptr inserts caller pointer into handle table (aliasing) which is a structural risk of in-memory aliasing/ownership but does not reach REE here.']

ルール: other

['if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64

フェーズ: ['unknown']

詳細: ["Zeroing memory at db->ptrs + db->max_ptrs which is derived from realloc'd db->ptrs; destination is TA heap (private) but origin of db may be uncertain.", 'destination pointer is db->ptrs + db->max_ptrs (caller-managed buffer) being passed to MemFill; origin is reallocated DB array in TA memory', 'fill byte value (0) passed as argument; constant but included for binding completeness', 'size expression derived from db->max_ptrs and new_max_ptrs (caller-controlled); arithmetic influences amount of memory written']

ルール: other

['TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:136

フェーズ: ['unknown']

詳細: ["Call-site binding: 'out' parameter (&attr) is caller-local TA storage provided to receive bytes"]

ルール: other

['rc = serialargs_get(args, &attr, sizeof(attr));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:163

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'out' parameter is &session_handle (TA-local stack) at caller site; destination is TEE-private local storage.", "caller-provided 'args' passed from upstream call-site (second call) is REE-origin serialargs buffer", "Call-site binding: 'out' parameter (&session_handle) is caller-local TA variable to receive data", "Binding: callee 'args' parameter receives &ctrlargs which was initialized from REE memref buffer -> indirect REE-originated data.", "Binding: callee 'out' parameter is &session_handle (caller stack) — destination for decoded value is TA-local but originates from caller-provided buffer."]

ルール: other

['rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:206

フェーズ: ['unknown']

詳細: ['Call-site binding: params array from REE passed into entry_create_object; origin is REE-visible memref']

ルール: other

['rc = entry_create_object(client, ptypes, params);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:209

フェーズ: ['unknown']

詳細: ["Binding caller-provided 'client' into callee; provenance not proven TEE-private."]

ルール: other

['rc = entry_destroy_object(client, ptypes, params);']
other MEDIUM

関数: ['TEE_CreatePersistentObject', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257

フェーズ: ['unknown']

詳細: ['Persistent object created from obj->attributes which may include untrusted/REE-derived attribute bytes (template); writing to storage using TEE_CreatePersistentObject', 'Creates persistent object from obj->attributes which may include REE-derived attribute bytes', 'obj->uuid (UUID) pointer from TA object passed into storage API; origin is TA-managed but provenance may include earlier REE-derived data', 'obj->attributes buffer (derived from template/head) passed to persistent-create; may contain REE-derived attribute bytes copied into TA storage', 'address of obj->attribs_hdl passed to API to receive handle; callee will write TA object handle into this location (caller stack/obj)', 'Persistent object creation copies obj->attributes into secure storage; if attributes contain attacker-controlled bytes (from earlier deserialization) this could persist attacker data.', 'Binding of callee parameter for UUID to obj->uuid which was produced in-TA by create_object_uuid (server-side origin); ensure provenance accounted for.', 'Binding of callee parameter for initial object data to obj->attributes; attributes originate from templates parsed earlier (REE-derived then processed), so provenance is mixed/uncertain.', 'Binding of callee out-parameter attribs handle to &obj->attribs_hdl (TA-private storage) so kernel will write back into TA-owned field.']

ルール: other

['TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, obj->uuid, sizeof(TEE_UUID), tee_obj_flags, TEE_HANDLE_NULL, obj->attributes, size, &obj->attribs_hdl);', 'TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl);', '..., obj->attributes, size, ...', '&obj->attribs_hdl', 'res = TEE_CreatePersistentObject(..., obj->uuid, sizeof(TEE_UUID), ..., obj->attributes, size, &obj->attribs_hdl);', 'res = TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:285

フェーズ: ['unknown']

詳細: ['Assigns generated object handle into caller-provided out_handle.']

ルール: other

['*out_handle = obj_handle;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:301

フェーズ: ['unknown']

詳細: ['Caller passes params (REE memrefs) into entry_get_attribute_value; these are the origin of tainted data used later.']

ルール: other

['rc = entry_get_attribute_value(client, ptypes, params);']
other MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:366

フェーズ: ['unknown']

詳細: ['Copies local rc to caller-provided params[0].memref.buffer (REE-visible); destination is shared but data is non-sensitive.', 'Copies local rc into REE-visible params[0].memref.buffer; destination is shared with REE (caller).']

ルール: other

['TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:390

フェーズ: ['unknown']

詳細: ['Copies local obj_handle into out->memref.buffer (caller-provided REE-visible memref) via TEE_MemMove; destination is shared/REE-visible.', 'Copies obj_handle (non-sensitive) into caller-provided out->memref.buffer (REE-visible); structural info flow to REE but not promoted to unencrypted_output.', 'Copies obj_handle into caller-provided out->memref.buffer (MEMREF_OUTPUT) — structural risk of writing into shared buffer.', 'Copies obj_handle into caller-provided REE-visible out->memref.buffer; structural risk of writing to shared buffer (but obj_handle is non-sensitive)', 'Copies local obj_handle into caller-provided out->memref.buffer (REE-visible); destination is shared but value is non-sensitive.', 'Copies obj_handle (TA-private) into caller-provided out->memref.buffer (REE-visible), exposing TA-created handle to REE.', 'Copies a TA-private obj_handle into caller-provided REE-visible memref (MEMREF_OUTPUT); structural risk but not part of evaluated sink line.', 'Copies local obj_handle into caller-provided REE-visible out->memref.buffer via TEE_MemMove; structural binding of shared output.', 'Binding: destination parameter aliases caller-provided out->memref.buffer (REE-visible) at this call-site.', 'Binding: source parameter is address of local obj_handle (TEE-private) at this call-site.']

ルール: other

['TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));']
weak_input_validation MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:508

フェーズ: ['unknown']

詳細: ['ptypes must equal exp_pt (MEMREF_INOUT); caller may pass MEMREF_OUTPUT leading to type mismatch and potential misuse of params as input.']

ルール: weak_input_validation

['if (!client || ptypes != exp_pt)\n    return PKCS11_CKR_ARGUMENTS_BAD;']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693

フェーズ: ['unknown']

詳細: ['Copies TA-side object handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; writes are bounded by out_count computed from REE size.', 'Copies TA-side object handles into caller-provided out->memref.buffer; writes are bounded by out_count computed from REE-provided size but remain a structural risk.', 'Binding: destination parameter aliases out_handles + count*sizeof(uint32_t); origin unclear at call-site.', 'Binding: source parameter aliases ctx->handles + ctx->next; origin unclear (could be TEE-private or derived from REE).', 'Binding: destination pointer argument aliases caller-provided out_handles (REE-visible memref) allowing TA->REE writes.', 'Binding: source pointer argument references TA-private ctx->handles (internal), aliased into memcpy source.']

ルール: other

['TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:823

フェーズ: ['unknown']

詳細: ["Construction of 'template' from REE-controlled serialargs; any inconsistency in declared attrs_size vs actual data can make subsequent TEE_MemMove calls unsafe."]

ルール: other

['cur = (char *)template + sizeof(struct pkcs11_object_head); end = cur + template->attrs_size;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832

フェーズ: ['unknown']

詳細: ['Binding: destination parameter is &cli_head (local stack variable, TEE-private) at this call-site.', 'Binding: source parameter is cli_ref which likely points into caller-provided serialized attributes (REE-visible); treated as shared.', 'TEE_MemMove reads client-supplied attribute header into TA-local cli_head; ctrl data is untrusted and must be validated.', 'Binding: destination &cli_head (TA-private) is written from cli_ref which points into parsed template (origin from REE-controlled params -> template); origin ambiguity.']

ルール: other

['TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:839

フェーズ: ['unknown']

詳細: ['Binding: destination parameter is &cli_ref->size which aliases caller-provided attribute area (REE-visible).', 'Binding: source parameter is &cli_head.size (TEE-private local), copied into potentially REE-visible storage.']

ルール: other

['TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:854

フェーズ: ['unknown']

詳細: ['Binding: destination parameter is &cli_ref->size (attribute in caller area, REE-visible).', 'Binding: source parameter is &cli_head.size (TEE-private) at this call-site.']

ルール: other

['TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:886

フェーズ: ['unknown']

詳細: ['Binding: destination parameter is &cli_ref->size (REE-visible attribute area) at this call-site.', 'Binding: source is &cli_head.size (TEE-private) copied into caller-visible attr field.', 'Binding: writes cli_head.size back into cli_ref->size within template (template may originate from REE data parsed earlier).']

ルール: other

['TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:910

フェーズ: ['unknown']

詳細: ["Copies 'template' (TA-side object describing attributes, may include sensitive attributes flagged earlier) into out->memref.buffer (REE-visible), potentially exposing attributes.", 'Final copy of template into out->memref.buffer (REE-visible) may expose attribute data if template contains sensitive attributes not filtered earlier.', 'Copies template (attributes) into REE-visible out buffer; may expose sensitive attributes if attr_sensitive was set earlier.', 'Later copies template to REE-visible out->memref.buffer; if template contains sensitive attributes or malformed sizes, there is a structural risk of exposing data or truncation.', 'Template (populated earlier via get_attribute/TEE_MemMove into cli_ref->data) is copied wholesale to REE-visible out->memref.buffer, potentially exposing attributes flagged sensitive.', 'Copies template (attributes) into out->memref.buffer (REE-visible); attributes may include sensitive flags/values if export gating fails.', 'Copies TA-constructed template (which may contain attribute values) into REE-visible out->memref.buffer; this is the actual REE-facing copy that could leak attributes if they are sensitive.', "Copies TA-owned 'template' (which may include attributes marked sensitive earlier) into REE-visible out->memref.buffer, potentially exposing attribute data.", 'Copies TA-side attribute template into REE-visible out buffer; may expose attributes (some earlier logic attempts to mark sensitive/unavailable, but residual risk remains).', "Copies TA-side 'template' (attributes) into REE-visible out->memref.buffer; may expose sensitive attributes flagged earlier.", 'Binding: destination parameter aliases out->memref.buffer (REE-visible) for attribute copy.', 'Binding: source parameter is template which was allocated/filled earlier (likely TEE-private).', 'TEE_MemMove copies template (TA-private) into caller-provided out->memref.buffer; need to ensure attributes are allowed to be exported.', "Binding: copies TA-side 'template' into out->memref.buffer (REE-visible), potentially exposing attributes assembled in TA."]

ルール: other

['TEE_MemMove(out->memref.buffer, template, out->memref.size);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966

フェーズ: ['unknown']

詳細: ['Copies computed obj_size into out->memref.buffer (caller-provided REE-visible memref) via TEE_MemMove; destination is shared/REE-visible though obj_size is non-sensitive.', 'Copies computed obj_size into REE-visible out->memref.buffer; destination is shared but obj_size is non-sensitive.', 'Copies computed obj_size into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though obj_size is non-sensitive.', 'Copies computed obj_size into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared even though obj_size appears non-sensitive.', 'Binding: destination parameter aliases out->memref.buffer (REE-visible) receiving obj_size.', 'Binding: source parameter is &obj_size (TEE-private local), copied to caller-visible buffer.', 'Binding: writes obj_size (TA-calculated) into out->memref.buffer (REE-visible) — REE-visible destination receives TA data.', 'Binding callee dest to out->memref.buffer which is caller-provided REE-visible memref', 'Binding callee src to &obj_size (TA-local value) passed as source', 'Binding callee len to sizeof(obj_size) immediate value']

ルール: other

['TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));', 'call-site: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209

フェーズ: ['unknown']

詳細: ['Copies object attributes from TA-private obj->attributes into freshly allocated TA-private head_new via TEE_MemMove', 'Copies obj->attributes into freshly allocated head_new (TA-private) before modification; risk: attribute handling may later be exposed if not sanitized.', 'Copies object attributes from obj->attributes into newly allocated head_new; ensure template_size computed from attrs_size is correct to avoid overflow.', 'Binding: destination parameter is head_new which is likely TEE-allocated (uncertain), origin ambiguous.', 'Binding: source parameter is obj->attributes (object-internal storage, TEE-private) at this call-site.', 'Binding: copies obj->attributes into head_new (allocation in TA) — src is TA object storage, dst is TA allocation; origin linkage to REE-controlled attributes earlier is possible.', 'Binding callee dest to head_new (allocator-returned buffer) origin unclear', 'Binding callee src to obj->attributes (object-owned attributes, TA-private)', 'Binding callee len to template_size (caller-provided size)', "Call-site binding: destination 'head_new' is TA-allocated (TEE-private) receiving data from TA-private obj->attributes via TEE_MemMove", "Call-site binding: source 'obj->attributes' is TA-private buffer passed into TEE_MemMove"]

ルール: other

['TEE_MemMove(head_new, obj->attributes, template_size);', 'call-site: TEE_MemMove(head_new, obj->attributes, template_size);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237

フェーズ: ['unknown']

詳細: ['Copies obj_handle (local, non-sensitive handle) into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); not sensitive but structural channel to REE.', 'obj_handle (TA-local) is copied into caller-provided out->memref.buffer (REE-visible); check callers for sensitive data exposure.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); param was checked for size but structural risk of exposing TA-private handles to REE exists.', 'Copies obj_handle into caller-provided out buffer (MEMREF_OUTPUT) — structural output exposure but not promoted to unencrypted_output.', 'Copies obj_handle into caller-provided out buffer (REE-visible); obj_handle is non-sensitive but is a structural REE-visible write.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); confirmed size check earlier ensures out->memref.size == sizeof(obj_handle) but REE-visible destination remains.', 'Copies obj_handle to caller-provided out buffer; checked earlier that out->memref.size == sizeof(obj_handle).', 'Writes obj_handle into caller-provided out->memref.buffer (MEMREF_OUTPUT); not promoted to unencrypted_output since data is non-sensitive.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); needs correct ptypes/size checks (which are present) to avoid misuse.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); potential information flow to REE though obj_handle is non-sensitive.', 'Copies obj_handle into caller-provided out buffer (REE-visible); out->memref.size was validated earlier to equal sizeof(obj_handle).', 'Copies obj_handle into caller-provided out memref; out is REE-visible but obj_handle is non-sensitive.', 'Copies obj_handle into caller-provided out buffer (REE-visible); currently obj_handle is non-sensitive but this is a REE-facing copy.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); noted as structural risk though not promoted to unencrypted_output here.', 'Copies obj_handle into caller-provided out->memref.buffer (REE-visible); structurally notable but not promoted to unencrypted_output.', 'Binding: destination parameter aliases out->memref.buffer (REE-visible) for returning obj_handle.', 'Binding: source parameter is &obj_handle (TEE-private local) copied into REE-visible buffer.', 'Binding: writes obj_handle into out->memref.buffer (REE-visible) — returns TA handle to REE.', 'Binding callee dest to out->memref.buffer which is caller-provided REE-visible memref', 'Binding callee src to &obj_handle (TA-local handle) passed as source', 'Binding callee len to sizeof(obj_handle) immediate value', "Call-site binding: destination 'out->memref.buffer' aliases caller-provided REE-visible buffer passed as params[2].memref.buffer", "Call-site binding: source '&obj_handle' is TA-local value copied into caller's REE-visible buffer"]

ルール: other

['TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));', 'call-site: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1528

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'head' parameter aliases caller's attributes pointer; origin (REE-shared template vs TA-owned attributes) is ambiguous.", 'Binding: caller passes obj attrs pointer into get_bool; origin of attributes is TA object storage (TEE-private) though ultimately influenced by REE-driven operations.']

ルール: other

['return get_bool(head, PKCS11_CKA_PRIVATE);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1538

フェーズ: ['unknown']

詳細: ["callee 'head' parameter aliases obj->attributes from caller (TA-private); provenance affects authorization checks that use returned boolean"]

ルール: other

['return get_bool(head, PKCS11_CKA_MODIFIABLE);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1588

フェーズ: ['unknown']

詳細: ['get_attribute reads into bbool using size from caller-derived data; caller-provided template/head may come from REE without strong validation']

ルール: weak_input_validation

['if (get_bool(head, PKCS11_CKA_TRUSTED) &&']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:2179

フェーズ: ['unknown']

詳細: ['Call-site binding: head parameter is obj->attributes (TA-private attributes structure) passed from caller']

ルール: other

['return get_bool(obj->attributes, attr->id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:2414

フェーズ: ['unknown']

詳細: ["Call-site binding: head parameter aliases 'head' built from client-supplied template (originates from REE-provided ctrl buffer)", "Call-site binding: first arg 'head' here aliases head built from template that originated from REE-supplied ctrl buffer"]

ルール: other

['if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN))', 'if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:2423

フェーズ: ['unknown']

詳細: ['Call-site binding: first call reads parent_priv from obj->attributes (TA-private)']

ルール: other

['bool parent_priv = get_bool(obj->attributes, cli_ref.id);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:2424

フェーズ: ['unknown']

詳細: ['Call-site binding: second call reads obj_priv from head (attributes derived from REE template)']

ルール: other

['bool obj_priv = get_bool(head, cli_ref.id);']
other MEDIUM

関数: ['TEE_OpenPersistentObject']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48

フェーズ: ['unknown']

詳細: ['Uses file name derived from token to open persistent object (TEE_OpenPersistentObject); persistent destination protection and filename contents not proven.', 'Uses filename derived from token to open persistent object; persistent destination protection and filename contents not fully proven.', 'Uses token-derived filename buffer to open a persistent object; filename may be influenced by token state which can reflect REE-controlled inputs.', 'Opens persistent object using filename buffer; if filename is attacker-influenced, this affects which persistent object is accessed/created.', 'Opens/creates persistent object using TA-derived file name; structural interaction with persistent storage.', 'TEE_OpenPersistentObject may write persistent-object handle into caller-provided out_hdl which aliases caller storage (db_hdl)', "TEE_OpenPersistentObject is invoked with local 'file' buffer produced from token; filename derives from token and is used to open persistent storage.", 'Filename computed by snprintf is used to open a persistent object; filename provenance is influenced by token/session originating from REE-derived handle.']

ルール: other

['return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);', 'return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl);', 'TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl);', 'return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl);']
other MEDIUM

関数: ['TEE_WriteObjectData', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

フェーズ: ['unknown']

詳細: ['Writes TA-held token->db_main into persistent storage via TEE_WriteObjectData; persistent destination region and protection are not proven here.', 'Writes TA-held token->db_main into persistent storage via TEE_WriteObjectData; persistent destination protection is not proven here.', 'TEE_WriteObjectData writes token->db_main (which may include REE-derived credential hashes) to persistent storage; recorded as TEE-private persistent write of sensitive data.', 'Writes token->db_main (contains PIN hashes/flags) to persistent storage via TEE_WriteObjectData; sensitive credential material persisted.', 'Writes token->db_main (contains PIN hashes/flags) to persistent storage; sensitive credential material is persisted.', 'Writes token->db_main (contains PIN-related fields) to persistent storage via TEE_WriteObjectData; sensitive credential material may be persisted.', 'Writes token->db_main (contains PIN-related fields) to persistent storage; sensitive credential material may be persisted.', 'Writes the token->db_main structure to persistent storage via TEE_WriteObjectData; persisted data contains credential-related fields (PIN counters/hashes).', 'Writes TA-private persistent DB (may include credential-related fields) to persistent storage handle.', 'Writes TA-private token->db_main structure into a persistent TEE object via TEE_WriteObjectData; data includes sensitive token state.', 'Writes TA-private token state into persistent TEE object; structural sensitive persistence.', 'Call-site binding: db_hdl is an object handle created locally (open_db_file) passed into TEE_WriteObjectData; origin is TA-managed handle.', 'Call-site binding: buf argument token->db_main is TA memory (but influenced by earlier REE-derived token_id); alias of TA structure passed to write API.', 'Writes TA-held token database structure to persistent storage via TEE_WriteObjectData; destination protection/visibility not proven here.', 'Buffer argument token->db_main (may include credential hashes derived from REE PIN) is passed into write API; binding of caller-owned data recorded.', 'TEE_WriteObjectData persists token->db_main which contains credential hashes derived from REE PIN; recorded as TEE-private persistent write of sensitive data.', "Call-site binding: 'db_hdl' is produced by open_db_file and passed into TEE_WriteObjectData; origin is TEE object handle used for persistent storage.", 'Writes token->db_main (contains PIN hashes/flags) from TA memory into persistent object via TEE_WriteObjectData; sensitive credential material persisted.', 'Persists token->db_main (contains PIN hashes and flags) to persistent storage; sensitive credential material is being written.', 'Persists token->db_main (contains PIN/hash/counters) to storage via TEE_WriteObjectData; sensitive credential material is written to persistent storage.', "Call-site binding: data pointer 'token->db_main' originates from TA token state (contains PIN-related fields) passed into writer.", 'Persists token->db_main (contains PIN/hash/counters) to persistent storage; sensitive credential material is written within TEE.', 'Call-site binding: data buffer argument originates from token->db_main (credential-related structure) and is written to persistent storage.', 'Call-site binding: db_hdl originates from open_db_file(token,&db_hdl) and is used as destination handle for write; origin tied to token persistent storage.', 'Write operation persists credential-related fields (PIN counters/hashes); persisting sensitive state to storage.', 'Writes credential-related token->db_main to persistent storage; sensitive TA state persisted even though not exposed to REE here.', "Call-site binding: buffer 'token->db_main' (TA-private persistent DB state, may contain credential fields) passed into TEE_WriteObjectData for persistence.", "Call-site binding: 'db_hdl' is handle returned by open_db_file (TEE object handle, TA-private origin).", "Call-site binding: 'token->db_main' buffer (TA-private) written into persistent object; contains sensitive token state.", 'Writes TA-private token->db_main into persistent TEE object; contains sensitive token state but remains in TEE storage.']

ルール: other

['res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));', 'TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105

フェーズ: ['unknown']

詳細: ["Call-site binding: local variable 's' (TA-private) passed as buffer to TEE_GenerateRandom; RNG output written into TA storage.", 'Address of local s (TEE-private stack) is passed as destination to TEE_GenerateRandom; random written into TEE-private variable.', 'Call-site binding: destination &s is TA-local storage (TEE-private) receiving generated randomness (random considered non-sensitive by default).']

ルール: other

['TEE_GenerateRandom(&s, sizeof(s));']
other MEDIUM

関数: ['TEE_GenerateRandom']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314

フェーズ: ['unknown']

詳細: ['Allocates obj->uuid via TEE_Malloc and fills with TEE_GenerateRandom; randomness treated public by default but uuid uniqueness loop queries persistent store.']

ルール: other

['TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));']
other MEDIUM

関数: ['=', 'TEE_GenerateRandom']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322

フェーズ: ['unknown']

詳細: ['Call-site binding: obj->uuid (persistent object field, TA-private) passed as buffer to TEE_GenerateRandom; RNG fills UUID in-place.', 'obj->uuid (TEE-private object field) is used as destination for random bytes to generate a UUID; binding of destination recorded.', 'Call-site binding: destination obj->uuid is TA-managed persistent object field (TEE-private) filled with randomness for UUID; origin is TA-private.', "Fills obj->uuid (TEE_Malloc'd) with random bytes; randomness treated non-sensitive by default though used as persistent object identifier.", "Binding: obj->uuid (allocated in TA) passed as buffer argument to TEE_GenerateRandom; origin is TEE_Malloc'd memory in TA.", 'Generates random bytes directly into obj->uuid (TA-allocated buffer); buffer originates from TEE_Malloc and is TA-private but derived object may be later persisted or exposed.']

ルール: other

['TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371

フェーズ: ['unknown']

詳細: ['Allocation size for ptr derived from token->db_objs->count; if count is inconsistent this may lead to incorrect sizing for subsequent copies.']

ルール: other

['ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID)), ...);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388

フェーズ: ['unknown']

詳細: ['Uses idx (from get_persistent_obj_idx) to compute copy lengths and offsets for TEE_MemMove/array shifts; if idx arithmetic is wrong it may miscompute sizes.', 'Uses idx from get_persistent_obj_idx to compute copy lengths and offsets for TEE_MemMove; incorrect idx arithmetic could miscompute sizes.', 'Copies persistent DB header and first part of UUID array into a freshly allocated buffer using a size derived from idx; idx is validated but buffer arithmetic should be reviewed', 'Copies token->db_objs into locally allocated ptr based on idx-derived length; index and sizes depend on token->db_objs contents.', 'Copies token->db_objs into local ptr using idx-derived length; sizes depend on token->db_objs contents.', 'TEE_MemMove copies token->db_objs into newly allocated ptr using idx derived from get_persistent_obj_idx(token, uuid); idx influenced by uuid which originated from earlier REE-driven handle parsing.', 'Copies DB metadata influenced by idx derived from uuid parsed earlier (provenance from REE-derived handle).', "Binding: destination argument 'ptr' is TA-allocated buffer (TEE_Malloc) passed as dest.", "Binding: source argument 'token->db_objs' is TA-owned database structure passed as src.", 'Length depends on idx (from get_persistent_obj_idx) and token->db_objs->count; arithmetic may miscompute copy length if counts/idx inconsistent.', 'Initial TEE_MemMove uses idx-derived length; arithmetic assumptions on counts may be incorrect without explicit bounds at the call.', 'Copies from token->db_objs (persistent DB) into freshly allocated ptr using idx-derived length; source is TA-managed persistent data but index and size depend on token->db_objs->count', 'Allocation and copy lengths depend on token->db_objs->count and idx; if metadata is corrupted elsewhere this could lead to incorrect sizing.', 'Copies token->db_objs into newly allocated ptr using idx-derived length; sizes depend on token->db_objs contents.', 'Copy from token->db_objs into freshly allocated ptr using idx-derived length; source and destination are TA-managed persistent structures.', "Destination 'ptr' is allocated from TEE_Malloc and then written from token->db_objs; copy length depends on idx derived from uuid (REE-influenced handle).", "Binding dst parameter 'ptr' to caller allocation (TEE_Malloc) at call-site; origin is TEE-private.", "Binding src parameter 'token->db_objs' (TEE-private) to callee src; contains persistent DB entries.", 'TEE_MemMove copies DB entries into newly allocated ptr using idx derived from uuid parsed earlier; provenance of uuid is REE-influenced upstream.']

ルール: weak_input_validation, other

['TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));', 'TEE_MemMove(ptr, token->db_objs, ...);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

フェーズ: ['unknown']

詳細: ['Shifts UUID array tail into new buffer based on computed count; index-derived sizes are data-dependent.', 'TEE_MemMove shifts trailing UUIDs using count derived from ptr->count - idx; count is computed from ptr->count which depends on token->db_objs->count read earlier.', 'Shifts trailing UUIDs based on computed count; sizes depend on token->db_objs->count.', "Binding: destination &ptr->uuids[idx] is region inside TA-allocated 'ptr'.", 'Binding: source &token->db_objs->uuids[idx + 1] is TA-owned array element used as src.', "Copy length 'count * sizeof(TEE_UUID)' derived from ptr->count - idx; if arithmetic under/overflows, copy may be out-of-bounds.", "Shift-copy of UUID array uses 'count' derived from ptr->count - idx; missing explicit bounds check at call site.", 'Shifts tail UUIDs within ptr using count computed from ptr->count - idx; length depends on ptr->count and idx validated earlier', 'Moves tail UUIDs within persistent lists using count-derived length; count depends on ptr->count and idx.', 'Copy length computed from ptr->count and idx; while upstream checks make it safe, absence of an immediate explicit count>=0 check is a structural risk.', 'Shifts trailing UUIDs within ptr from token->db_objs; indices and count drive the copy length (derived from TA data).', 'Shifts trailing UUIDs using count computed from ptr->count and idx; count derived from token->db_objs->count read earlier.', "Binding dst parameter '&ptr->uuids[idx]' to allocated ptr region; destination is TEE-private and index idx is REE-influenced.", "Binding src parameter '&token->db_objs->uuids[idx + 1]' to token DB region; source is TEE-private."]

ルール: other, weak_input_validation

['TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));', 'TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], ...);']
other MEDIUM

関数: ['TEE_WriteObjectData', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399

フェーズ: ['unknown']

詳細: ['TEE_WriteObjectData writes updated ptr to persistent storage; data derived from token->db_objs with sizes computed from ptr->count.', 'Writes updated DB contents to persistent storage; data derived from token->db_objs and influenced by earlier REE-provided handle selection.', "Pointer 'ptr' passed as buffer to write API; origin may include persistent object list derived from TA data, binding recorded.", 'Persists object list structure (ptr) to storage; written blob size depends on ptr->count which may reflect TA state influenced by REE inputs.', "Call-site binding: 'ptr' data pointer aliases TA-managed persistent objects structure passed into writer.", "Call-site binding: buffer 'ptr' (token persistent objects blob) passed to TEE_WriteObjectData to store objects metadata persistently.", "Call-site binding: 'db_hdl' is TEE object handle used for write (TEE-private origin).", "Call-site binding: 'ptr' buffer (TA-private persistent objs) is written to storage; size derived from ptr->count."]

ルール: other

['res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));', 'TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435

フェーズ: ['unknown']

詳細: ['Copies provided uuid into token->db_objs (persistent index) via TEE_MemMove; source uuid provenance uncertain (may be REE-derived)', 'Copies uuid into token persistent index; uuid provenance may be REE-influenced', 'Copies UUID into token->db_objs array via TEE_MemMove/implicit move; destination is token-managed storage grown by TEE_Realloc', 'Copies UUID into token->db_objs array via TEE_MemMove/implicit move; destination is token-managed storage grown by TEE_Realloc.', 'Binding: destination token->db_objs->uuids + count is TA-managed array location used as dest.', "Binding: source 'uuid' is local/stack or caller-supplied UUID used as src.", 'Inserts uuid into token->db_objs by copying caller-provided uuid into db array; destination is TA-managed persistent array and source may be external/internal uuid', 'Copies uuid into token->db_objs array slot; origin of uuid may be internal but binding persists into persistent array.', 'Copies provided uuid into token->db_objs->uuids area; destination is TA-managed persistent DB memory updated from local uuid.', 'Inserts uuid into token->db_objs; destination is token->db_objs and source is uuid local buffer.', "Binding dst parameter 'token->db_objs->uuids + count' to token DB storage (TEE-private).", "Binding src parameter 'uuid' (local buffer) to callee; uuid may be populated from disk earlier and used to create objects.", 'Destination buffer token->db_objs->uuids+count is TEE-managed memory (realloc result) receiving copied uuid; destination provenance is TEE-private but allocation was recent', 'Source uuid passed into TEE_MemMove may originate from obj->uuid (potentially derived from REE-supplied attributes), provenance uncertain', 'The move call writes potentially untrusted uuid bytes into the token index before persisting; persisting later may store REE-derived data', 'Copies uuid (provenance uncertain, may be derived from REE-supplied template) into token->db_objs index prior to persistence; this persists potentially untrusted data.', "Binding call-site dest parameter to token->db_objs->uuids + count (storage just realloc'd); dest originates from TA-managed token storage", "Binding call-site src parameter to 'uuid' (caller-provided/generated UUID)", 'Copies UUID into token->db_objs array; growth and indexing depend on count derived from persistent state — bounds should be validated.']

ルール: other

['TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:445

フェーズ: ['unknown']

詳細: ['db handle returned by open_db_file is passed to TEE_TruncateObjectData; handle provenance is TA-private but call truncates persistent storage making provenance a structural risk', 'Binding of callee handle parameter to caller-local db_hdl obtained from open_db_file; handle is TA-managed object handle', 'Binding of callee length parameter to computed size expression derived from token structures (caller-controlled counts); length influences truncate extent']

ルール: other

['res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));']
other MEDIUM

関数: ['TEE_WriteObjectData', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:456

フェーズ: ['unknown']

詳細: ['Writes token->db_objs (including uuids array) to persistent storage via TEE_WriteObjectData; this persists data that may have originated outside TEE', 'Persists token->db_objs (including uuids) to storage; data may originate outside TEE', 'token->db_objs passed into write API (contains object UUIDs); binding of TA-private structure recorded.', 'Writes token->db_objs (object listing with UUIDs) to persistent storage; TA-private metadata persisted.', "Call-site binding: 'token->db_objs' pointer passed to writer aliases TA-managed structure.", "Call-site binding: buffer 'token->db_objs' (TA-private object list including UUIDs) written persistently via TEE_WriteObjectData.", "Call-site binding: 'db_hdl' object handle used for write (TEE-private origin).", "Call-site binding: 'token->db_objs' buffer (TA-private) written; size depends on token->db_objs->count.", 'Persists token->db_objs (including uuids array) to storage; persisted data may include bytes originating from untrusted input.', 'Writes token->db_objs (including uuids array) to persistent storage; this persists data that may have originated outside TEE']

ルール: other

['res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));', 'TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));']
weak_input_validation MEDIUM

関数: ['TEE_WriteObjectData']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:561

フェーズ: ['unknown']

詳細: ['size computed from obj->attributes->attrs_size (potentially attacker-controlled) is used to write/truncate persistent storage without further validation']

ルール: weak_input_validation

['size = sizeof(struct obj_attrs) + obj->attributes->attrs_size; res = TEE_WriteObjectData(hdl, obj->attributes, size);']
other MEDIUM

関数: ['=', 'TEE_WriteObjectData']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563

フェーズ: ['unknown']

詳細: ['obj->attributes (attributes blob) passed into write API; may include sensitive attributes derived from REE PINs, binding recorded.', 'Writes object attributes (obj->attributes) of size based on attrs_size to storage; persisted attribute blobs may contain sensitive metadata.', "Call-site binding: 'obj->attributes' pointer passed to writer aliases TA object attributes memory.", "Call-site binding: buffer 'obj->attributes' (object attributes, may include sensitive attributes) written to storage via TEE_WriteObjectData.", "Call-site binding: 'hdl' is a TEE object handle (TEE-private) used for write.", "Call-site binding: 'obj->attributes' buffer (TA-private) written to object; size from obj->attributes->attrs_size.", 'Writes obj->attributes to persistent storage using size computed from obj->attributes->attrs_size which may be influenced by earlier REE-derived template; size not strongly validated before write', 'size computed from obj->attributes->attrs_size (potentially attacker-controlled) is used to write persistent storage without further validation']

ルール: other, weak_input_validation

['res = TEE_WriteObjectData(hdl, obj->attributes, size);', 'TEE_WriteObjectData(hdl, obj->attributes, size);']
weak_input_validation MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:567

フェーズ: ['unknown']

詳細: ['size derived from obj->attributes->attrs_size (potentially attacker-influenced) is passed to TEE_TruncateObjectData without additional validation']

ルール: weak_input_validation

['res = TEE_TruncateObjectData(hdl, size);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640

フェーズ: ['unknown']

詳細: ["Binding: destination 'uuid' is local variable receiving data read from db_objs.", 'Copies sizeof(*uuid) from &db_objs->uuids[idx] with idx validated earlier but without redundant bounds check at this call site.', 'Copies UUID from db_objs into local uuid buffer for object creation; destination uuid buffer provenance depends on caller and is used to create object', 'Copies UUID from db_objs into local uuid buffer; reads persistent array into caller-provided uuid pointer.', 'Reads UUID from persistent DB into local uuid buffer; source is token DB object area (TA-private).', 'Reads uuid from db_objs into uuid local variable; copy length sizeof(*uuid).', "Binding dst parameter 'uuid' (local output buffer) to callee; used subsequently to create token object.", "Binding src parameter '&db_objs->uuids[idx]' to callee; source is token DB region read from disk earlier.", "Binding call-site dest parameter to local 'uuid' buffer (target for read from persistent list)", 'Binding call-site src parameter to &db_objs->uuids[idx] (persistent array element)']

ルール: other, weak_input_validation

['TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));']
weak_input_validation MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:682

フェーズ: ['unknown']

詳細: ['computed size (sizeof(*db_main)+sizeof(*db_objs)) used to truncate persistent DB object; size provenance should be validated']

ルール: weak_input_validation

['res = TEE_TruncateObjectData(db_hdl, sizeof(*db_main) + sizeof(*db_objs));']
other MEDIUM

関数: ['=', 'TEE_WriteObjectData']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:693

フェーズ: ['unknown']

詳細: ['db_objs structure passed into write API to persist empty list; binding recorded for persistent update.', 'Writes db_objs (possibly empty) to persistent storage; finalizing persistent state via writer.', "Call-site binding: 'db_objs' pointer passed to writer aliases TA-managed persistent object header.", "Call-site binding: buffer 'db_objs' (empty/reset object list) persisted via TEE_WriteObjectData after initialization.", "Call-site binding: 'db_hdl' handle used for final write (TEE-private origin).", "Call-site binding: 'db_objs' buffer (TA-private) written to persistent storage; contains persistent object metadata.", 'Writes db_objs (TA-local DB structure) to persistent storage; binding of db_objs pointer passed into write']

ルール: other

['res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));', 'TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));']
other MEDIUM

関数: ['=', 'snprintf']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):30

フェーズ: ['unknown']

詳細: ['name buffer (caller-provided stack array) is passed as destination to snprintf; alias of caller buffer into formatting function.', "Formatting output via snprintf writes into caller buffer 'name'; output size depends on get_token_id(token) formatting and size parameter."]

ルール: other

['int n = snprintf(name, size, "token.db.%u", get_token_id(token));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):44

フェーズ: ['unknown']

詳細: ['token (caller-provided) passed into get_db_file_name; alias of caller token structure into helper.', "file buffer (caller stack array) passed as 'name' into get_db_file_name; alias of local buffer into helper."]

ルール: other

['res = get_db_file_name(token, file, sizeof(file));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):377

フェーズ: ['unknown']

詳細: ['token (caller-provided) passed into open_db_file; alias of caller token structure into helper.', '&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.']

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):441

フェーズ: ['unknown']

詳細: ['token (caller-provided) passed into open_db_file; alias of caller token structure into helper.', '&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.']

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):598

フェーズ: ['unknown']

詳細: ['token (caller-provided) passed into open_db_file; alias of caller token structure into helper.', '&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.']

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site):662

フェーズ: ['unknown']

詳細: ['token (caller-provided) passed into get_db_file_name; alias of caller token structure into helper.', "file buffer (caller stack array) passed as 'name' into get_db_file_name; alias of local buffer into helper."]

ルール: other

['res = get_db_file_name(token, file, sizeof(file));']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:220

フェーズ: ['unknown']

詳細: ['Reads attribute header from untrusted cur and uses cli_head.size to advance parsing loop without stronger validation.']

ルール: weak_input_validation

['TEE_MemMove(&cli_head, cur, sizeof(cli_head));']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:352

フェーズ: ['unknown']

詳細: ['Copies data from cur using pkcs11_ref.size (untrusted) even though bounded by MIN(), reliance on parsed size may be risky.']

ルール: weak_input_validation

['TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554

フェーズ: ['unknown']

詳細: ['Uses get_class(head) and object_is_private(head) on provided head without explicit null/structure integrity checks beyond switch default']

ルール: weak_input_validation

['switch (get_class(head)) { ... private = object_is_private(head); }']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566

フェーズ: ['unknown']

詳細: ['Access decision uses session predicates where session is influenced by REE-provided data; untrusted session provenance may affect auth checks.']

ルール: weak_input_validation

['if (private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session)))']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1669

フェーズ: ['unknown']

詳細: ['Asserts that key type matches expected value using get_key_type(head) where head is derived from untrusted templates; malformed attrs could lead to incorrect behavior', 'Asserts key-type via get_key_type(head) where head is derived from untrusted templates; malformed attrs could disrupt processing.']

ルール: weak_input_validation

['assert(get_key_type(head) == PKCS11_CKK_EC);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1885

フェーズ: ['unknown']

詳細: ['Parses allowed mechanism list from attributes and compares entries to proc_id (caller-controlled) using TEE_MemMove; relies on attribute contents and size from get_attribute_ptr without strong validation.']

ルール: weak_input_validation

['for (count = size / sizeof(uint32_t); count; count--) { TEE_MemMove(&proc, attr, sizeof(uint32_t)); attr += sizeof(uint32_t); if (proc == proc_id) return true; }']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1886

フェーズ: ['unknown']

詳細: ['Copies 4-byte words from attr buffer (attribute blob) into local proc using length derived from attribute size; relies on attribute contents and size with limited validation.', 'Copies 4-byte words from attribute buffer into local variable using size-derived loop count; relies on attribute blob size/content correctness.']

ルール: weak_input_validation

['TEE_MemMove(&proc, attr, sizeof(uint32_t));']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2178

フェーズ: ['unknown']

詳細: ['uses obj->attributes and attr->id to decide modifiability (get_bool), relying on object state without additional validation of attr contents', 'Uses attr->id (from untrusted input) to index into obj->attributes via get_bool without validating that id maps to a valid stored attribute']

ルール: other, weak_input_validation

['return get_bool(obj->attributes, attr->id);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2236

フェーズ: ['unknown']

詳細: ['uses attr->id (from REE-derived req_attr) to index get_bool(obj->attributes, attr->id) without additional bounds checks on id', 'Uses untrusted attr->id (from parsed REE data) to decide modifiability and may call get_bool with that id without additional validation']

ルール: weak_input_validation

['case PKCS11_CKA_EXTRACTABLE: return get_bool(obj->attributes, attr->id);']
other MEDIUM

関数: ['=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311

フェーズ: ['unknown']

詳細: ['alias of caller-provided req_attr (derived from REE-supplied head) used directly to switch on id', 'Decision logic uses req_attr->id (from untrusted parsed data) to control allowances; id-driven branches may allow changes without validating attribute payload/size', 'Decision logic branches directly on req_attr->id from untrusted parsed data; attribute payload/size not re-validated before allowing modifications.']

ルール: other, weak_input_validation

['switch (req_attr->id) {', 'switch (req_attr->id) { ... }']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380

フェーズ: ['unknown']

詳細: ['reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating that sizeof(cli_ref)+cli_ref.size stays within end', "Parses client-supplied attribute entries from 'head' (derived from caller) with len computed from untrusted cli_ref.size; loop uses cur < end but cli_ref.size not validated against remaining bytes", 'Parses client-supplied attribute entries into cli_ref using TEE_MemMove without validating cli_ref.size against remaining bytes.', 'Parses client-supplied attribute entries and copies header without validating cli_ref.size against remaining buffer before using it as a bound.', 'Reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating that sizeof(cli_ref)+cli_ref.size stays within end', 'Parses client-supplied attribute headers using cli_ref.size from untrusted buffer without validating that cli_ref.size fits remaining bytes.', 'reads attribute header from REE-derived blob and uses cli_ref.size to advance parsing without fully validating total length', 'Parses client-supplied attribute entries using cli_ref.size without validating it against remaining bytes before using it to advance the cursor.', 'reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating bounds against end', 'Parses client-supplied attribute headers from head buffer using cli_ref.size without explicit validation against remaining bytes before using cli_ref.size-controlled lengths.', "Copies a cli_ref struct from 'cur' pointer into local structure without explicit bounds on cur's provenance/remaining buffer length.", 'Copies a cli_ref struct from buffer without explicit provenance/remaining-length validation of source.', 'destination is &cli_ref (local TA stack/TEE-private) bound to callee dst parameter', "source pointer 'cur' is derived from head (attributes list) which originates from REE-visible memory", 'reads header via TEE_MemMove from cur (derived from REE) and then uses cli_ref.size to compute len without proving sizeof(cli_ref)+cli_ref.size <= end', "Call-site binding: destination '&cli_ref' is a TA-local stack object (TEE-private)", "Source 'cur' points into attributes built from caller data; copying sizeof(cli_ref) before validating cli_ref.size may allow parsing of malformed/short input"]

ルール: weak_input_validation, other

['TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;', 'TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2381

フェーズ: ['unknown']

詳細: ['len computed from cli_ref.size (tainted) is used to advance cur; if cli_ref.size is large or causes overflow, loop arithmetic may go out-of-bounds.', 'cli_ref.size (from untrusted buffer) is used to compute len for advancing cur without validation against remaining bytes, enabling parsing errors or out-of-bounds advances.']

ルール: weak_input_validation

['len = sizeof(cli_ref) + cli_ref.size;']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2662

フェーズ: ['unknown']

詳細: ["Copies attribute value (likely TA-private secret) into freshly TEE_Malloc'd buffer using *sz; source sensitivity is secret and buffer is TA-private.", 'Copies attribute VALUE into allocated buffer using size from get_attribute_ptr without additional validation; upstream header corruption could influence size.', 'Copies *sz bytes from value into buffer; origin/provenance of value and buffer sizes unclear, risk of overwriting shared memory if buffer is REE-visible.', 'Copies *sz bytes from value into buffer; provenance and sizes unclear, potential overwrite if buffer is REE-visible.', "destination 'buffer' passed to callee; buffer likely TA-allocated (TEE-private) but origin uncertain here", "source 'value' passed into callee; origin not clear in this snippet (could be REE or TA)", "Call-site binding: destination 'buffer' is TA-allocated (likely TEE_Malloc) and thus TA-private", "Call-site binding: source 'value' provenance unclear (could be REE-provided or TA-owned); origin not validated here", 'Call-site binding: callee first parameter (dest) is buffer allocated by TEE_Malloc in this function (TA-private).', 'Call-site binding: callee second parameter (src) aliases attribute value from head (TA-private secret).', 'Call-site binding: callee third parameter (size) is *sz derived from attribute length (TA-controlled).', 'Copies attribute value (likely secret) into newly allocated TEE-private buffer using *sz; sensitive data flows within TA and is later used for wrapping.']

ルール: other

['TEE_MemMove(buffer, value, *sz);']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2736

フェーズ: ['unknown']

詳細: ['Allocates buffer with TEE_Malloc to hold sensitive private-key DER; returns it via *data/*sz making TA-private secret available to caller.']

ルール: other

['buffer = TEE_Malloc(der_size, ...); *data = buffer; *sz = mbedtls_rc;']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2737

フェーズ: ['unknown']

詳細: ['Allocates TA-private buffer to hold sensitive private-key DER and returns it via out parameters; sensitive data becomes available to caller context.']

ルール: other

['buffer = TEE_Malloc(der_size, ...); *data = buffer; *sz = mbedtls_rc;']
other MEDIUM

関数: ['=', 'mbedtls_pk_write_key_der']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743

フェーズ: ['unknown']

詳細: ["Call-site binding: callee 'pk' parameter is local mbedtls_pk_context (TA-private) used to produce DER key bytes.", "Call-site binding: callee 'buffer' parameter is TA-allocated buffer (TEE_Malloc) and will receive private-key DER bytes.", "Call-site binding: callee 'der_size' parameter is caller-provided allocation size (der_size) controlling how many bytes may be written.", 'Writes private-key DER into TA-private buffer; sensitive data produced and returned to caller via *data/*sz in caller.']

ルール: other

['mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);']
other MEDIUM

関数: ['array_write']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2750

フェーズ: ['unknown']

詳細: ['Per-byte in-place copy loop moves DER bytes to front of buffer and zeroes tail; operates on TA-private buffer containing secret—ensure loop bounds match mbedtls_rc.', 'Per-byte in-place copy moves DER bytes to front of buffer and zeroes tail; ensure loop bounds match mbedtls_rc to avoid buffer issues.', 'Per-byte loop moves DER bytes to buffer front and zeroes tail; requires correct bounds (mbedtls_rc vs der_size).']

ルール: other

['for (i = 0; i < mbedtls_rc; i++) { buffer[i] = buffer[i + start]; buffer[i + start] = 0; }']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2772

フェーズ: ['unknown']

詳細: ['Produces key_data/key_sz from key attributes (secret material) which will later be used for wrapping; sensitive TA-private data is allocated/encoded here.']

ルール: other

['rc = alloc_copy_attribute_value(head, data, sz) / rc = encode_rsa_private_key_der(head, data, sz);']
weak_input_validation MEDIUM

関数: ['set_attribute']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2825

フェーズ: ['unknown']

詳細: ['set_attribute called with id pointer and id_size obtained from get_attribute_ptr without additional validation of provenance or size limits', 'set_attribute invoked with id pointer and id_size from get_attribute_ptr without stronger validation', 'set_attribute called with id pointer and id_size obtained from get_attribute_ptr without additional validation of provenance or size limits.', 'set_attribute called with id pointer/size from get_attribute_ptr without validating provenance or reasonable size limits']

ルール: weak_input_validation

['return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:59

フェーズ: ['unknown']

詳細: ["Call-site binding: 'out_hdl' (caller-provided address) is written by open_db_file via TEE_OpenPersistentObject; origin is caller-local handle."]

ルール: other

['res = TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);']
other MEDIUM

関数: ['TEE_WriteObjectData']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:64

フェーズ: ['unknown']

詳細: ['TEE_WriteObjectData persists token->db_main (may include hashes derived from REE-supplied PIN) to persistent storage.']

ルール: other

['res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:170

フェーズ: ['unknown']

詳細: ['Call-site binding: callee params pointer aliases caller-provided params (REE-visible) allowing REE-controlled memrefs into the function.', 'Call-site binding: callee params pointer aliases caller-provided params (REE-visible).']

ルール: other

['rc = entry_ck_token_mecha_ids(ptypes, params);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:190

フェーズ: ['unknown']

詳細: ['Call-site binding: params (caller-provided memref buffer) aliased into callee parameter (ctrl) — shared REE buffer passed to TA.']

ルール: other

['rc = entry_ck_token_initialize(ptypes, params);']
other MEDIUM

関数: ['=', 'TEE_MemFill']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283

フェーズ: ['unknown']

詳細: ["Binding: callee will write into buffer derived from caller-provided pointer 'str' (alias of info field in caller).", 'Per-byte fill into buffer at offset n; n derived from str content but bounded by size via strnlen.', 'Destination pointer is caller-derived (str + n); TEE_MemFill writes len bytes at that alias of caller buffer.', 'fills bytes at str + n for length (size - n) using TEE_MemFill; write target depends on caller-provided pointer/size', 'alias of caller-provided buffer (str) passed derived (str + n) into TEE_MemFill; write target originates from caller', 'fills len bytes at destination (dst) using caller-controlled size - n; write depends on caller pointer/size']

ルール: other

["TEE_MemFill(str + n, ' ', size - n);"]
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:293

フェーズ: ['unknown']

詳細: ['Caller passes address of local dev_id into TEE_GetPropertyAsUUID (alias of TA-private buffer bound to callee parameter).', 'Property name string literal passed to TEE API (binding of callee parameter to a TA-resident const string).']

ルール: other

['res = TEE_GetPropertyAsUUID(TEE_PROPSET_TEE_IMPLEMENTATION, "gpd.tee.deviceID", &dev_id);', '"gpd.tee.deviceID"']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305

フェーズ: ['unknown']

詳細: ['Copies formatted desc into info->slot_description via TEE_MemMove; dest and src are TA-private but ultimately flow to caller buffer later.', 'Copies formatted desc into info->slot_description; although TA-private, this flows later to caller buffer.', 'Copies local formatted desc into info->slot_description (both TA-private) via TEE_MemMove.']

ルール: other

['TEE_MemMove(info->slot_description, desc, n);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353

フェーズ: ['unknown']

詳細: ['Copies local struct info into caller-provided out->memref.buffer (shared/REE-visible destination).', 'Copies local struct info into caller-provided out->memref.buffer (REE-visible destination).', 'Copies local info struct into caller-provided out->memref.buffer (shared/REE-visible destination).', 'Copies local info struct into caller-provided out->memref.buffer (shared/REE-visible); this is a potential information-disclosure sink to the REE.', 'Destination out->memref.buffer is caller-provided (REE-visible) and is bound to TEE_MemMove dst parameter (alias of shared buffer).', 'Local non-sensitive struct info copied into caller-provided REE-visible buffer (shared buffer alias).']

ルール: other

['TEE_MemMove(out->memref.buffer, &info, out->memref.size);']
other MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:366

フェーズ: ['unknown']

詳細: ['Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.']

ルール: other

['TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:377

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' originates from session->token (path earlier) and is passed to open_db_file; influences persistent DB access.", 'Call-site binding: out_hdl is &db_hdl (local) and will receive a persistent object handle from callee.', 'Binding token into open_db_file parameter; token is TA-managed structure.']

ルール: other

['res = open_db_file(token, &db_hdl);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406

フェーズ: ['unknown']

詳細: ["Destination buffer 'sn' is a TA-local stack buffer (TEE-private) passed to snprintf which writes formatted data there; subsequent memmove copies it into info.serial_number.", 'Format string argument is a constant (TA-private) passed into snprintf; binding noted for pointer argument provenance.']

ルール: other

['n = snprintf(sn, sizeof(sn), "%0*"PRIu32, (int)sizeof(info.serial_number), token_id);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:411

フェーズ: ['unknown']

詳細: ['Copies sn into info.serial_number (TA-private fields) via TEE_MemMove.', 'Copies into local info.serial_number from sn; src is caller-influenced but destination is TA-private struct field.', "TA-local serial string 'sn' (filled by snprintf) is copied into caller-provided out->memref.buffer; destination is REE-visible though data appears non-sensitive.", 'Copies from local sn into info.serial_number (both TA-local buffers); binding shows both src/dst are TEE-private, so no REE boundary but still a data movement site.']

ルール: other

['TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:414

フェーズ: ['unknown']

詳細: ['Copies token label into info.label (both TA-private) via TEE_MemMove.', 'Copies token label from token DB (TEE-private) into TA-private info.label field; binding of src to callee src parameter.']

ルール: other

['TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:420

フェーズ: ['unknown']

詳細: ['Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared though info appears non-sensitive.', 'Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible); destination is shared though info appears non-sensitive.', 'Copies local info into caller out->memref.buffer (shared/REE-visible destination).', 'Copies local info into caller-provided out->memref.buffer (alias of shared buffer passed as dst).', 'Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible); binding records shared destination originating from REE params.']

ルール: other

['TEE_MemMove(out->memref.buffer, &info, sizeof(info));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:441

フェーズ: ['unknown']

詳細: ["Call-site binding: 'token' passed may be influenced by earlier REE-provided session state; used to compute DB filename.", 'Call-site binding: out_hdl (&db_hdl) receives object handle; callee controls persistent object access.']

ルール: other

['res = open_db_file(token, &db_hdl);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488

フェーズ: ['unknown']

詳細: ['TEE_MemMove copies TA-allocated mechanism list into REE-provided out->memref.buffer; out->memref.size earlier used to derive allocation count (attacker-controlled), risking size/alloc validation issues.', 'Copies array (TA-allocated) into caller out->memref.buffer (REE-visible); caller size set just prior.', 'Copies array into caller-provided out->memref.buffer; dst aliases REE-visible buffer passed from caller.', "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible).", "Call-site binding: source parameter aliases TA-allocated 'array' (TEE-private)."]

ルール: weak_input_validation, other

['TEE_MemMove(out->memref.buffer, array, out->memref.size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:501

フェーズ: ['unknown']

詳細: ['Local aliases ctrl and out point into caller params (shared/REE-visible buffers)']

ルール: other

['TEE_Param *ctrl = params; TEE_Param *out = params + 2;']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538

フェーズ: ['unknown']

詳細: ['Copies TA-constructed info into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove', 'Copies TA-constructed mechanism info into caller-provided out->memref.buffer (REE-visible).', 'Copies local info into caller out buffer (REE-visible) via TEE_MemMove.', 'Copies local info into caller-provided out->memref.buffer (binding dst to shared buffer).', "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible).", "Call-site binding: source parameter is address of TA-local 'info' (TEE-private).", 'Call-site binds callee dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA-local &info — alias of shared buffer passed into helper', 'Copies TA-constructed info into caller-provided out->memref.buffer (shared/REE-visible); size check enforced but structural aliasing to shared buffer remains a risk if semantics change.']

ルール: other

['TEE_MemMove(out->memref.buffer, &info, sizeof(info));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678

フェーズ: ['unknown']

詳細: ['Copies session handle into caller out buffer (REE-visible destination).', 'Copies session handle into caller-provided out buffer (dst is REE-visible from caller).', "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible) at session handle return.", 'Call-site binding: source parameter is TA-local session->handle (TEE-private).', 'Call-site binds dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA session handle — alias of shared buffer passed into helper', 'Copies session->handle (TEE-private) into caller-provided out->memref.buffer (REE-visible), binding callee dest/src to shared/TEE origins.']

ルール: other

['TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810

フェーズ: ['unknown']

詳細: ['Copies info into caller out buffer (REE-visible) via TEE_MemMove.', 'Copies local info into caller-provided out->memref.buffer; dst is alias of shared buffer.', "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible) when returning info.", "Call-site binding: source parameter is TA-local 'info' struct (TEE-private).", 'Call-site binds dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA-local info structure', 'Copies local info (TEE-private) into caller-provided out->memref.buffer (REE-visible), binding callee params to shared/TEE origins.', "Destination is caller-provided memref buffer (REE-visible) while source is TA-private struct 'info'; binding shows TA writing into REE-shared memory.", "Source '&info' is TA-private and is copied into a REE-visible buffer (out->memref.buffer); records binding of callee src parameter to TA-private origin.", "TA-local session info is copied into a REE-visible memref; structurally this is TA->REE data flow which would be sensitive if 'info' contained secrets."]

ルール: other

['TEE_MemMove(out->memref.buffer, &info, sizeof(info));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943

フェーズ: ['unknown']

詳細: ['Copies label into token->db_main->label (TA-private destination) via TEE_MemMove.', 'Copies caller-provided label into token DB field (dst is TA-private but src is REE-visible); binding src to callee src parameter.', 'Call-site binding: destination parameter aliases TA-local token DB label buffer (TEE-private) being written to by caller before move.', "Call-site binding: source parameter 'label' originates from REE (caller-provided).", "Call-site copies label into token->db_main->label; dest is TA-private while source 'label' provenance is unclear (likely REE-origin), so alias binding recorded", "Copies from 'label' into token->db_main->label; source provenance unclear (could be REE), destination is TEE-private—binding observed.", 'TEE_MemMove copies label into token DB; source provenance unclear (could be REE), so structural risk flagged.', 'Destination token label field is TA-internal (TEE-private); binding records callee dst param aliasing TA storage.', "Source 'label' origin is unclear (could be REE-provided); binding records callee src param origin uncertainty.", 'Binding dest parameter to token->db_main->label (TA-private destination) at call-site; destination is TA storage.', "Binding src parameter to 'label' which was populated from caller-controlled serialargs (REE-origin); input may be attacker-controlled."]

ルール: other, weak_input_validation

['TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659

フェーズ: ['unknown']

詳細: ['Generates random into TA-private buffer then copies into caller-provided out->memref.buffer (REE-visible); random is public by default.', 'Binding of callee buffer parameter to a TA-allocated buffer (TEE_Malloc) at call-site; records origin and that generated bytes (random) are written into this buffer.']

ルール: other

['TEE_GenerateRandom(buffer, count); TEE_MemMove(data, buffer, count);', 'TEE_GenerateRandom(buffer, count);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1660

フェーズ: ['unknown']

詳細: ['Copies random bytes from TA-generated buffer into data (destination region depends on caller); source is TEE-generated random (non-sensitive by default).', 'Moves random bytes (generated by TEE_GenerateRandom) from buffer into data; src is TEE-private random, dst region unclear (binding shown).', "Copies from buffer filled by TEE_GenerateRandom into data; origins ambiguous across call-sites (buffer is TA-generated random, data's region unclear).", "Call-site binding: destination parameter 'data' (TA buffer being filled) is TA-managed (unknown allocation provenance).", "Call-site binding: source parameter 'buffer' was filled by TEE_GenerateRandom (non-sensitive random by default) before the move.", 'Call-site moves random bytes from buffer (generated by TEE_GenerateRandom) into data; both source and dest are TA-private — internal copy recorded', "Copies random bytes from buffer (produced by TEE_GenerateRandom, TEE-private) into 'data' whose provenance is unclear; binding observed and labeled as random.", "Source 'buffer' is filled by TEE_GenerateRandom (TA-private random) then moved; binding records src as TA-private random.", "Destination 'data' region is unclear at this site (could be TA-private or REE-visible); binding records uncertainty which is a structural risk.", "Binding dest parameter to 'data' at call-site; destination region unclear in this context.", "Binding src parameter to 'buffer' filled by TEE_GenerateRandom (TEE-private random source).", 'Copies generated random from TA-private buffer into caller-provided out->memref.buffer (REE-visible); random is public by default but this is a structural disclosure path.', 'Binding of callee dest parameter to caller-provided out->memref.buffer (shared/REE-visible); alias of shared buffer passed into helper.', 'Binding of callee src parameter to TA-allocated buffer (TEE_Malloc) which is TA-private; records origin.', 'Copies TA-generated random bytes from TA-private buffer into caller-provided (REE-visible) buffer via TEE_MemMove.']

ルール: other

['TEE_MemMove(data, buffer, count);', 'TEE_MemMove(data, buffer, count); // dest = data (out->memref.buffer)', 'TEE_MemMove(data, buffer, count); // src = buffer (TEE_Malloc)', 'TEE_GenerateRandom(buffer, count); TEE_MemMove(data, buffer, count);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:49

フェーズ: ['unknown']

詳細: ["data pointer (a_ptr) from TEE alloc_get_tee_attribute_data is copied by length 'size' into realloc'd buffer without upstream semantic validation of 'size' vs expected attr capacity"]

ルール: weak_input_validation

['rc = serialize(bstart, &buf_len, data, size);']
other MEDIUM

関数: ['=', 'alloc_and_get']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:119

フェーズ: ['unknown']

詳細: ["binds callee 'args' to caller ctrlargs (derived from REE-provided memref buffer)", "binds callee 'orig_next' to caller orig_next (cursor into REE buffer)", "binds callee 'buf0' to caller &head (TA-local source header)", "binds callee 'out' to caller &p (TA-local recipient pointer)", 'Propagates head.size (from reader-controlled args) into alloc_and_get which uses it for allocation/copy without an explicit semantic upper bound.']

ルール: other, weak_input_validation

['rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:136

フェーズ: ['unknown']

詳細: ['caller passes &attr (stack) as out; function reads src from args (which originates from REE-visible buffer) and copies size bytes into caller stack object']

ルール: other

['rc = serialargs_get(args, &attr, sizeof(attr));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:140

フェーズ: ['unknown']

詳細: ["binds callee 'args' to caller ctrlargs (REE-derived) at second call site", "binds callee 'orig_next' to caller orig_next (REE cursor) at second call site", "binds callee 'buf0' to caller &attr (TA-local header) at second call site", "binds callee 'out' to caller &p (TA-local) at second call site"]

ルール: other

['rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:163

フェーズ: ['unknown']

詳細: ['caller passes &session_handle as out; function copies size bytes from args-derived src (potentially REE memory) into caller stack variable', "alias of serialargs structure (initialized from caller ctrl->memref.buffer) is passed as 'args' (originates from REE-visible memref)", "caller-provided output pointer (&session_handle) passed as 'out' to callee; callee writes into caller stack/TA-private memory"]

ルール: other

['rv = serialargs_get(args, &session_handle, sizeof(uint32_t));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:176

フェーズ: ['unknown']

詳細: ['caller passes head (attributes structure built from templates ultimately derived from REE input) into get_attribute_ptr; alias of possibly untrusted-origin attributes', 'attr_ptr out-parameter is bound to storage inside attribute structures (may alias into template-derived memory)', 'attr_size out-parameter is written with attribute size returned from get_attribute_ptrs; size may originate from untrusted attribute metadata']

ルール: other

['rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);', 'get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:184

フェーズ: ['unknown']

詳細: ["Binding: src 'data' originates from attribute buffer (serialargs/template) likely originating from REE; copied into local value_len (stack) via TEE_MemMove."]

ルール: other

['TEE_MemMove(&value_len, data, data_size);']
weak_input_validation MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191

フェーズ: ['unknown']

詳細: ['value_len derived from attribute (originating from template/serialargs) is used to TEE_Malloc without an explicit upper bound check', 'Allocates value using value_len derived from template attribute without an explicit upper bound check.', 'value_len is taken from an attribute and used to TEE_Malloc without an explicit upper bound, allowing large allocations or resource exhaustion.', 'value_len derived from attribute (caller-controlled template) is used to allocate without an application-level upper bound', 'value_len derived from caller-provided attribute is used to allocate memory without an explicit upper bound check', 'value_len derived from a caller-controlled attribute is used as allocation size without an explicit upper bound check']

ルール: weak_input_validation

['value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:195

フェーズ: ['unknown']

詳細: ["callee buffer parameter is an alias of a TEE_Malloc'd buffer (TEE-private) passed into TEE_GenerateRandom"]

ルール: other

['TEE_GenerateRandom(value, value_len);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:289

フェーズ: ['unknown']

詳細: ["caller-provided client pointer (from tee_session) is passed through as callee 'client' parameter; origin not proven TEE-private", 'alias of shared params array (caller-provided TEE_Param memrefs) passed into helper; memref buffers are REE-visible']

ルール: other

['rc = entry_generate_secret(client, ptypes, params);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322

フェーズ: ['unknown']

詳細: ['Binding: destination out->memref.buffer is caller-provided REE-visible buffer; obj_handle (TEE-private) copied into it.', 'obj_handle (TA-private) is copied into caller-provided out memref (REE-visible); rc already validated out->memref.size == sizeof(obj_handle)', 'Destination is caller-provided out->memref.buffer (REE-visible) bound to TEE_MemMove dest parameter.', 'Source is &obj_handle (TA-local) bound to TEE_MemMove src parameter.', 'Writes TA-local object handle into REE-visible out->memref.buffer; bounds checked but structurally exposes TA-managed handle to REE.', 'Writes generated object handle into caller-provided output memref (REE-visible)']

ルール: other

['TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344

フェーズ: ['unknown']

詳細: ['tee_obj handle (TEE object) passed into TEE_GetObjectBufferAttribute; handle is TEE-private', 'size out-parameter (&sz) bound by TEE_GetObjectBufferAttribute on first probe call', 'tee_obj handle originates from caller (TEE-private) and selects which attribute is queried; taint of handle affects returned size/data', 'attribute selector (attribute) influences returned data and its sensitivity (can select private key material)', 'tee_obj handle (TEE-private) passed into TEE_GetObjectBufferAttribute probe call; callee reads object metadata', 'address of local sz passed so callee writes required size back to caller']

ルール: other

['res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);']
other MEDIUM

関数: ['unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348

フェーズ: ['unknown']

詳細: ['queried size (sz) is used to allocate memory without explicit upper bound check; large sizes could lead to excessive allocation', 'Queried size sz is used to allocate memory without an explicit upper bound check; large or malformed sizes could lead to excessive allocation (resource exhaustion).']

ルール: other

['ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);']
other MEDIUM

関数: ['TEE_GetObjectBufferAttribute', '=', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352

フェーズ: ['unknown']

詳細: ['Copies object attribute into allocated buffer via TEE_GetObjectBufferAttribute; provenance is TEE object attribute (TEE-private)', 'destination buffer ptr provided by caller is filled with object attribute bytes; buffer was allocated locally via TEE_Malloc', 'TEE_GetObjectBufferAttribute copies attribute data (sz bytes) from TEE object into ptr; provenance is TEE object attribute (TEE-private)', 'allocated ptr receives attribute data from TEE (may contain secret key bytes); caller later copies this into TA structures', 'Allocated buffer ptr receives attribute data which may contain secret key bytes; downstream code copies these attributes into TA-managed structures and may eventually export them to REE.', "Copies TEE object attribute into allocated buffer via TEE_GetObjectBufferAttribute; buffer is TEE_Malloc'ed and later returned to caller", "buffer ptr (TEE_Malloc'ed) passed as destination for attribute data; callee writes attribute bytes into this TA-allocated buffer", 'address of sz passed so callee may update actual size written into ptr']

ルール: other

['res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:553

フェーズ: ['unknown']

詳細: ['Copies key handles into caller-provided out buffer; structural risk but not promoted to unencrypted_output here.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk: REE-visible destination but values are non-sensitive handles', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); destination is shared even though handles are non-sensitive.', 'alias of caller-provided out->memref.buffer bound to hdl_ptr (shared buffer passed into helper)', 'params (caller-provided memrefs) alias into local pointers (ctrl/out/hld_ptr); shared buffer provenance is REE-visible which is a structural risk to track.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); while handles are non-sensitive, this is an alias of shared buffer passed from REE.']

ルール: other

['TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));', 'hdl_ptr = (uint32_t *)out->memref.buffer;']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555

フェーズ: ['unknown']

詳細: ['Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive', 'Writes generated key handles into caller-provided out buffer (REE-visible); potential information flow to REE occurs at this different sink line.', 'Copies generated handles into caller-provided out buffer; structural risk recorded.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but destination is REE-visible', 'Copies generated key handles into caller-provided out->memref.buffer (shared/REE-visible); handles are non-sensitive but destination is shared.', 'Copies generated key handles into caller-provided out buffer (shared); structural risk of exposing handles though not classified as sensitive here.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but writing into shared memory is structural risk to track.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive in context', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but the copy is to shared memory.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are not treated as sensitive here but destination is shared.', 'Copies key handles into caller-provided out buffer (REE-visible); ensure no TA-private secret is placed into this buffer.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk of exposing handles to REE', 'Binding: hdl_ptr aliases out->memref.buffer (REE-visible); pubkey_handle (TEE-private) copied into that shared buffer.', 'Destination hdl_ptr is alias of out->memref.buffer (caller-provided REE-visible) bound to dest.', 'Source &pubkey_handle is TA-local bound to src parameter.', 'Writes generated key handles into caller-provided out->memref.buffer (REE-visible).', 'alias of caller-provided out->memref.buffer passed as dest (shared/REE-visible) into TEE_MemMove at key-pair creation site', 'alias of TA-local pubkey_handle passed as src into TEE_MemMove', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are considered non-sensitive', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk since destination is shared memory.', 'Copies created key handles into caller-provided out buffer (REE-visible); potential information flow to REE depending on handle semantics.', 'Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk of exposing handles to REE.']

ルール: other

['TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));', '&pubkey_handle']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:556

フェーズ: ['unknown']

詳細: ['Binding: hdl_ptr+1 aliases out->memref.buffer (REE-visible); privkey_handle (TEE-private) copied into that shared buffer.', 'Destination hdl_ptr + 1 writes into caller-provided buffer (REE-visible) via dest parameter.', 'Source &privkey_handle is TA-local bound to src parameter.', 'Writes generated private key handle into caller-provided out->memref.buffer (REE-visible).', 'alias of caller-provided out->memref.buffer+1 passed as dest (shared/REE-visible) into TEE_MemMove for priv key handle', 'alias of TA-local privkey_handle passed as src into TEE_MemMove', 'Copies generated private key handle into caller-provided out->memref.buffer (REE-visible); structural risk due to shared buffer write.']

ルール: other

['TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));', '&privkey_handle']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:605

フェーズ: ['unknown']

詳細: ['alias of pub_head pointer (caller-controlled template) passed into helper; head originates from REE-derived templates']

ルール: other

['if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:607

フェーズ: ['unknown']

詳細: ['alias of priv_head pointer (caller template) passed into helper; head originates from REE-derived templates']

ルール: other

['remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:628

フェーズ: ['unknown']

詳細: ["Binding of callee 'db' parameter to caller 'object_db' at alternative call site; db is TA-managed", "Binding of callee 'ptr' parameter to caller 'obj' at alternative call site; ptr is object pointer (TEE-managed)"]

ルール: other

['handle = handle_get(object_db, obj);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:649

フェーズ: ['unknown']

詳細: ["alias of priv_head (callee 'head') passed from generate_ec_keys; origin is TA-managed structures built from REE-provided templates", "alias of a_ptr (callee 'data') passed from generate_ec_keys; a_ptr derived from REE-provided EC_PARAMS"]

ルール: other

['rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:653

フェーズ: ['unknown']

詳細: ['alias of pub_head pointer (originating from caller templates that may be REE-derived) passed into tee2pkcs_ec_attributes', 'alias of priv_head pointer (may contain attributes from REE templates) passed into tee2pkcs_ec_attributes', 'alias of tee_obj handle (TEE-allocated key object) passed into tee2pkcs_ec_attributes; tee_obj is TEE-private']

ルール: other

['rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:739

フェーズ: ['unknown']

詳細: ['alias of pub_head pointer (caller-controlled template) passed into helper at alternate call-site']

ルール: other

['if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:740

フェーズ: ['unknown']

詳細: ['alias of priv_head pointer (caller template) passed into helper at alternate call-site']

ルール: other

['remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:741

フェーズ: ['unknown']

詳細: ['alias of priv_head pointer (caller template) passed into helper at alternate call-site']

ルール: other

['remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:779

フェーズ: ['unknown']

詳細: ["alias of priv_head (callee 'head') passed from generate_ec_keys at second call-site; same origin as above", "alias of a_ptr (callee 'data') passed from generate_ec_keys at second call-site; a_ptr derived from REE-provided EC_PARAMS"]

ルール: other

['rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1046

フェーズ: ['unknown']

詳細: ['Binding: out->memref.buffer (REE-visible) receives obj_handle copied from TEE-private storage via TEE_MemMove.', 'Destination out->memref.buffer (caller-provided REE-visible) bound to dest parameter.', 'Source &obj_handle is TA-local bound to src parameter.', 'alias of caller-provided out->memref.buffer passed as dest into TEE_MemMove at object creation site', 'alias of TA-local obj_handle passed as src into TEE_MemMove']

ルール: other

['TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));', '&obj_handle']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1624

フェーズ: ['unknown']

詳細: ['caller passes &bbool/&sz (TEE-private locals) as attr/attr_size to get_attribute; head originates from templates derived from REE input']

ルール: other

['if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:2134

フェーズ: ['unknown']

詳細: ['caller passes &boolval/&boolsize (possibly from object attributes derived from REE) into get_attribute']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE, &boolval, &boolsize);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:2140

フェーズ: ['unknown']

詳細: ['caller passes &boolval/&boolsize (object attrs) into get_attribute; attributes ultimately originate from templates']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE, &boolval, &boolsize);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:2259

フェーズ: ['unknown']

詳細: ['caller passes &boolval/&boolsize (object attrs) into get_attribute; values are checked for trust flags']

ルール: other

['rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:2456

フェーズ: ['unknown']

詳細: ['caller requests PKCS11_CKA_VALUE_LEN into &key_length/&size where attribute storage may originate from REE-provided templates']

ルール: other

['rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:559

フェーズ: ['unknown']

詳細: ['Copies TEE-managed public coordinate x into an allocated ecpoint buffer via TEE_MemMove; ecpoint later stored into attr structures', 'Copies public X coordinate from TEE attribute into constructed ecpoint buffer.', 'binding: destination pointer is an ecpoint buffer allocated via TEE_Malloc (TEE-private) passed as dest', 'binding: source pointer x_ptr originates from alloc_get_tee_attribute_data (TEE-private)', 'binding: length argument x_size (attribute length) drives copy size']

ルール: other

['TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:564

フェーズ: ['unknown']

詳細: ['Copies TEE-managed public coordinate y into ecpoint via TEE_MemMove; ecpoint then added to public and private attribute lists', 'Copies public Y coordinate from TEE attribute into constructed ecpoint buffer.', 'binding: destination pointer is ecpoint buffer (TEE-private) passed as dest for y coordinate', 'binding: source pointer y_ptr originates from alloc_get_tee_attribute_data (TEE-private)', 'binding: length argument y_size (attribute length) drives copy size']

ルール: other

['TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:839

フェーズ: ['unknown']

詳細: ['binding: destination ctx->ctx passed as dest (likely TEE-private buffer) into TEE_MemMove', 'binding: source ctx_data passed into TEE_MemMove; provenance unclear (could be REE-derived)', 'binding: length ctx_len drives copy size into ctx->ctx']

ルール: other

['TEE_MemMove(ctx->ctx, ctx_data, ctx_len);']
other MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:708

フェーズ: ['unknown']

詳細: ['Copies attribute bytes (a_ptr) into local modulus_bits via TEE_MemMove; a_ptr provenance uncertain (could be from processed template), but size is validated prior', 'Copies attribute bytes into local modulus_bits after get_attribute_ptr; relies on get_attribute_ptr to have validated size.', 'Binding: destination parameter aliases local modulus_bits (TEE-private) passed as &modulus_bits into TEE_MemMove', 'Binding: source parameter aliases a_ptr which was obtained from attribute template; provenance unclear (could be REE-derived or TA-allocated)', 'Copies bytes from a_ptr into local modulus_bits; source provenance uncertain though size was validated to sizeof(uint32_t)', 'Source a_ptr provenance uncertain though size validated; copy into local modulus_bits may be safe but upstream origin unknown.']

ルール: other

['TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));']
other MEDIUM

関数: ['TEE_CipherDoFinal']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1052

フェーズ: ['unknown']

詳細: ['Potential disclosure: cipher output is written into out_buf (caller-owned REE-visible) from TA-private key material; there is a bounds check that may prevent overflow.']

ルール: other

['res = TEE_CipherDoFinal(proc->tee_op_handle, in_buf, in_sz, tmp_buf, &tmp_sz);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1078

フェーズ: ['unknown']

詳細: ["Call-site binding: destination in_buf is TEE_Malloc'd buffer (TA-private) receiving data.", 'Call-site binding: source is (uint8_t *)data + in_sz aliasing caller-provided TA-private data (sensitive key material).', "Call-site binding: length argument 'align' derived from data_sz % TEE_AES_BLOCK_SIZE (tainted by data_sz)."]

ルール: other

['TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33

フェーズ: ['unknown']

詳細: ["Copies 'size' bytes from src (derived from untrusted serialargs) into out; size is caller-provided and may be attacker-controlled.", 'Performs TEE_MemMove(out, src, size) where src originates from args (likely REE-backed) and size is caller-controlled; limited check relies on serialargs_get_ptr correctness', 'Performs TEE_MemMove(out, src, size) where src originates from args (likely REE-backed) and size is caller-controlled; relies on serialargs_get_ptr correctness', "Copies 'size' bytes from caller-controlled src (derived from args) into out via TEE_MemMove without visible bounds/sanity checks on args contents.", "Copies 'size' bytes from caller-controlled src into out via TEE_MemMove without additional local bounds/sanity checks at this function boundary.", "TEE_MemMove copies 'size' bytes from src (from args/REE) into out (TA-private); source is REE-controlled shared memory", 'Copies size bytes from src (derived from args buffer, i.e., REE-provided) into out without validating content, potentially letting untrusted bytes drive session_handle.', "Copies 'size' bytes from src (derived from caller-controlled serial buffer) into out without further validation of src contents or that size fits destination.", "Copies 'size' bytes from src derived from a REE-controlled serial buffer into out without further validation of src contents; relies on callers to ensure size matches destination."]

ルール: weak_input_validation, other

['TEE_MemMove(out, src, size);', 'if (!rc) TEE_MemMove(out, src, size);']
weak_input_validation MEDIUM

関数: ['TEE_MemMove', '=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

フェーズ: ['unknown']

詳細: ["Copies 'size' bytes from src (derived from untrusted serialargs/REE buffer) into out without additional bounds validation here; size is attacker-influenced", 'Binding: src argument originates from caller-controlled serialargs buffer (REE-visible); alias of shared buffer passed into helper', 'Binding: out parameter (destination) is caller-provided storage or local buffer and receives copied data; callee dest aliasing to caller storage', "alias of caller-provided 'out' (TA-local/out param) passed as dst here; destination originates from caller context", "alias of 'src' pointer (from serialargs_get_ptr) passed as src here; src is derived from args which originates from REE-provided buffer", "copies 'size' bytes from src (derived from args/REE) into out without validating that src contents or full bounds are trusted here", "Copies 'size' bytes from REE-derived src into TA memory without an explicit visible bounds check here tying size to destination capacity.", 'Copies size bytes from src (derived from args/REE data) into caller-provided out using TEE_MemMove; size originates from caller-controlled call and may be unvalidated.', "Copies 'size' bytes from src (derived from args/REE data) into out using TEE_MemMove; size is caller-influenced and may be unvalidated.", "Copies 'size' bytes from src (derived from serialargs_get_ptr reading args which originate from REE) into caller stack object 'out' (TEE-private) via TEE_MemMove", 'Copies bytes from args-derived src (REE) into local attr object; relies on serialargs_get_ptr for bounds validation', 'TEE_MemMove copies size bytes from src (derived via serialargs_get_ptr from REE data) into out without validating size or src provenance', 'Copies size bytes from src (derived from serialargs_get_ptr reading REE-controlled args) into caller-provided out without validating src provenance beyond serialargs_get_ptr return', "TEE_MemMove copies 'size' bytes from REE-derived src into TA memory without explicit validation at this callsite.", "Copies 'size' bytes from src (derived from args/REE input) into out without explicit local validation here; size is caller-provided.", "Copies 'size' bytes from src (derived from serialargs/REE input) into out without local validation here; size is caller-controlled.", "Call-site binding: destination 'out' at serialargs_get call is alias of caller-local buffer (e.g. &attr or &session_handle) - TEE-private.", "Copies 'size' bytes from src (derived from untrusted serialargs) into out; size may be attacker-controlled.", "Call-site binding: destination 'out' aliases caller-provided 'out' (TA-private) while src originates from serial buffer (REE-visible).", "Copies bytes from 'src' (may point into REE-originated serialargs buffer) into 'out' (TA-local destination), propagating untrusted input into TA memory.", "TEE_MemMove copies 'size' bytes from src (derived from args) to out without additional bounds validation here", "Copies 'size' bytes from src (derived from serialargs, likely REE-origin) to out without local bounds validation at this call-site", 'Performs TEE_MemMove(out, src, size) using size derived from caller without explicit upper-bound here', "Copies 'size' bytes from src (derived from args->next, REE-provided) into caller dest without an upper-bound check here", "Copies 'size' bytes from src (derived from REE-provided serialargs) into out without further type/value validation of contents", "Copies 'size' bytes from src (derived from REE-provided serialargs) into caller 'out' without validating content beyond size", "Copies 'size' bytes from src (derived from REE-provided serialargs) into out without validating the semantic/value of the data.", "Copies size bytes from src (originating from serialargs_get_ptr -> args, REE-backed) into caller 'out' without additional local bounds verification", "binding: 'out' argument is caller-supplied (e.g. &session_handle) passed into TEE_MemMove", "binding: 'src' argument originates from serialargs_get_ptr(args) which is backed by REE memref buffer", 'Copies size bytes from src (derived from args/REE buffer) into out without content validation beyond serialargs_get_ptr success.', "Copies 'size' bytes from src (derived from caller-controlled serialargs) into out (TA-private) without content validation beyond serialargs_get_ptr success.", 'src pointer originates from serialargs_get_ptr which reads from caller-controlled buffer (alias of REE-visible memory).', "Call-site binding: destination 'out' aliases caller-provided out pointer (here &session_handle in caller).", "Copies 'size' bytes from caller-controlled src (derived from args) into out via TEE_MemMove; relies on serialargs_get_ptr but lacks local bounds sanity here.", "TEE_MemMove copies 'size' bytes from src (derived from args/REE) into out without additional provenance checks here.", 'Copies sizeof(uint32_t) from src derived from serialargs (REE-provided) into caller out (TEE-private) without extra provenance checks here.', 'Copies bytes from src (derived via serialargs_get_ptr from REE-provided buffer) into out without visible content validation; untrusted session_handle can influence control flow.', "dst parameter 'out' binds to caller-provided buffer (caller stack variable), receiving bytes from src.", "src parameter 'src' originates from serialargs_get_ptr which points into REE-provided serial buffer.", 'Copies untrusted bytes from REE-visible src into TA memory without content validation; session_handle can be attacker-controlled.', 'Copies untrusted bytes from src (derived via serialargs_get_ptr into REE buffer) into TA memory without content validation; may allow attacker-controlled session_handle.', "TEE_MemMove copies 'size' bytes from src (from args, originated from REE-visible buffer) into out (caller-provided TA buffer), creating REE->TA flow.", "Copies 'size' bytes from src (originating from serialargs, which is backed by caller memref buffer) into out; creates REE->TA flow from shared buffer into TA memory.", "TEE_MemMove copies 'size' bytes from args-derived src into out; overall REE->TA flow recorded though caller used this to read a session handle.", 'Copies size bytes from src (derived from REE-controlled serialargs) into out via TEE_MemMove; src is attacker-influenced even though rc is checked.', 'Copies size bytes from src (derived from REE-controlled serialargs_get_ptr) into caller out; src is attacker-influenced though call-site checks rc.', "Call-site binding: 'out' parameter aliases caller stack variable (e.g., &session_handle) written by TEE_MemMove.", "Call-site binding: 'size' argument controls copy length (influences amount of REE-origin data moved).", 'Generic risk: TEE_MemMove moves attacker-influenced bytes from a shared-source into local memory; correctness depends on prior validation of size and src pointer.', 'Copies attacker-influenced bytes from serialargs into TA memory; correctness depends on upstream validation.', "Copies 'size' bytes from src (derived from REE-controlled args) into out without validating that src content is a well-formed integer/session handle.", "Copies 'size' bytes from src (derived from REE-controlled serialized args) into out without validating src content semantics.", 'Copies attacker-controlled serialized bytes into TA-local session_handle without semantic validation.', "Performs direct copy of 'size' bytes from src (derived from caller-provided buffer via serialargs_get_ptr) into out without additional validation beyond serialargs_get_ptr.", "Binding dst 'out' to caller-provided pointer (TA-private) and src to args-derived pointer (shared/REE-visible); record aliasing of parameters.", "Copies 'size' bytes from src (derived from args buffer, likely REE-provided) into caller-supplied out buffer via TEE_MemMove; source is REE-tainted.", "Copies 'size' bytes from src (derived from serialargs, likely REE-provided) into caller out buffer; source is REE-tainted.", "Binding dst argument to caller-provided 'out' (caller stack/local) so callee writes into caller memory.", "Copies 'size' bytes from args-derived src (REE-visible) into caller-provided out buffer; guarded by serialargs_get_ptr but source is REE-tainted.", "Copies 'size' bytes from src (obtained via serialargs_get_ptr from args) into out; src may originate from REE-visible buffer via args.", "Binding of dest parameter to caller 'out' which is TA-private stack storage (&session_handle) at call-site; records aliasing origin.", 'Binding of src parameter to pointer obtained from serialargs_get_ptr which may reference REE-originated buffer via args; records possible REE->TA origin.', 'Copies size bytes from src (derived from args which is REE-originated) into out via TEE_MemMove; src may be attacker-controlled if serialargs_get_ptr insufficiently validated.', "Call-site binding: 'out' parameter aliases caller-provided destination (e.g., &session_handle) which is TA-private at this call-site.", "Call-site binding: 'src' parameter aliases a pointer obtained from serialargs_get_ptr over args (which is built from REE memref), so src is REE-originated/shared.", "Copies 'size' bytes from src (derived from REE buffer) into out without additional size/overlap checks here; src may be attacker-controlled.", 'Copies bytes from REE-derived src into TA memory; if serialargs_get_ptr lacks adequate bounds/format validation, attacker-controlled input may influence parsed values.', "TEE_MemMove copies 'size' bytes from 'src' (derived from args/serial buffer, potentially REE-controlled) into caller-supplied out buffer.", "Destination 'out' is a TA-private buffer in serialargs_get but receives data from 'src' derived from args (potentially REE-controlled).", "Source 'src' originates from serialargs_get_ptr reading from a serial buffer (caller-controlled), so memmove copies REE-controlled bytes into TA memory.", "Call is dependent on 'size' provided by caller path; if serialargs_get_ptr did insufficient validation, this copy could be out-of-bounds.", "Copies 'size' bytes from src (derived from args -> shared REE buffer) into out without visible bounds check here; if serialargs_get_ptr insufficiently validated, untrusted data is copied into TA memory.", "Copies 'size' bytes from src derived from serialargs (REE-visible) into out without local bounds here; untrusted src can influence TA memory.", "Copies 'size' bytes from src derived from serialargs into TA memory; correctness depends on serialargs_get_ptr validation.", 'Copies from src derived via serialargs_get_ptr (likely REE-controlled) into out (&session_handle) which is TA-private; records binding of src/dest provenance.', 'Copies size bytes from src (derived from serialargs/REE buffer) into out via TEE_MemMove; src is untrusted and size-driven copy may be attacker-controlled.', "Copies 'size' bytes from src (derived from serialargs/REE buffer) into out (caller-provided); src is untrusted and length-driven copy may be attacker-controlled.", "Copies 'size' bytes from src (likely pointer into args->buffer derived from REE) into caller-provided out without additional validation of content.", "Binding: callee 'out' parameter is the caller's &session_handle (TA-local destination) passed into TEE_MemMove at call-site.", "Binding: callee 'src' parameter originates from args->buffer which was initialized from an REE-provided memref (shared/REE-visible).", "Binding: callee 'size' parameter is a caller-supplied length (numeric) used to control the copy; provenance and bounds validation depend on caller.", "Copies 'size' bytes from a source that may be REE-visible into a TA destination without additional validation here; caller must ensure bounds and trustworthiness.", "Copies 'size' bytes from a source derived from REE into TA-local memory without local validation here; relies on caller and serialargs_get_ptr to ensure bounds.", "Copies 'size' bytes from src (derived from args, potentially REE-shared buffer) into out via TEE_MemMove; risk of copying REE-provided data into TA memory if src is shared", "dest 'out' is written from src derived from args (which was initialized from ctrl->memref.buffer, REE-provided/shared); binding callee 'dest'/'src' to caller origins", "Copies 'size' bytes from src (derived from args/REE-controlled buffer) into out (TA-private); source is REE-visible shared memory.", "Copies 'size' bytes from src (derived from args which may be REE-provided) into out without content validation; untrusted bytes can control copied data.", "Call-site binding: destination 'out' is callee-provided pointer (alias of caller's out) at serialargs_get call.", "Copies 'size' bytes from src (derived from serialargs buffer, REE-controlled) into out without validating src contents or size against destination capacity.", 'Copies size bytes from src into out via TEE_MemMove without local verification of src length in this function (relies on serialargs_get_ptr).', 'Copies size bytes from src (bound to caller ctrl->memref.buffer) into out without local verification here; relies on upstream checks.', 'Copies size bytes from REE-provided src into out without local verification in this function; relies on serialargs_get_ptr/upstream validation.', "Copies 'size' bytes from src (obtained from args which references REE-visible memref) into out (caller buffer); flow moves REE-origin data into TA caller buffer.", "Copies 'size' bytes from src (obtained from serialargs_get_ptr which may reference REE-provided memref) into caller buffer 'out'; binds callee params to REE-derived source and caller destination.", "TEE_MemMove copies 'size' bytes from src (derived from args which may reference REE buffer) into out; correctness relies on serialargs_get_ptr's validation of bounds.", "Destination 'out' (caller-provided) receives size bytes from src derived from serialargs_get_ptr which reads from REE-originated buffer; relies on upstream validation.", "Call-site binding: 'src' parameter aliases memory obtained from args (which may reference REE-visible buffer).", "TEE_MemMove copies 'size' bytes from src (derived from REE args) into out; correctness depends on serialargs_get_ptr bounds validation.", 'Copies bytes from src (from args->buffer, likely REE-visible) into out via TEE_MemMove without local checks', "Binding dest parameter to caller 'out' (TA-private) at call site — alias of callee dest to local TA storage", 'Binding src parameter to pointer returned by serialargs_get_ptr (likely from args->buffer, REE-visible)', 'Copies bytes from src (from args->buffer, likely REE-visible) into out via TEE_MemMove; relies on serialargs_get_ptr for validation.', 'Copy from src (derived from REE-visible buffer) into caller-provided out pointer (callee writes into caller stack/vars) via TEE_MemMove observed at this call-site.', "Destination 'out' at this call-site is a TA-local variable pointer (callee writes into TA-private storage) while source originates from serialargs_get_ptr (derived from caller-provided REE buffer).", "Source 'src' at this call-site is bound from serialargs_get_ptr which reads from an args-initialized buffer (caller-provided memref).", 'serialargs_get copies from src derived from caller memref into out; src origin is REE-visible buffer initialized by caller.', 'Copies from src (obtained via serialargs_get_ptr, likely wrapping REE-provided buffer) into out; destination origin depends on caller (&token_id in callers) so aliasing between shared and private exists.', "Copies 'size' bytes from src (pointer derived from caller-controlled args) into out without local bounds checks here; size originates from caller in many call-sites.", "Copies 'size' bytes from src (derived from caller-controlled serialargs buffer) into out (TA memory) without local checks here.", "Copies 'size' bytes from src (pointer derived from caller-controlled args) into out without local checks here; relies on serialargs_get_ptr correctness.", 'Copies from src (which may originate from REE memref) into out; binds callee args to a caller-provided buffer origin.', 'Copies from a src pointer supplied by serialargs_get_ptr into caller-provided out; relies on serialargs_get_ptr validation.', "Copies 'size' bytes from src derived from REE-provided args into out without additional semantic validation of 'size' vs remaining buffer.", "Call-site binding: destination 'out' is TA-private (&old_pin_size/&pin_size) while source 'src' originates from serialargs buffer initialized from REE.", "Copies 'size' bytes from REE-derived src into TA memory; 'size' is caller-controlled and relies on prior serialargs validation.", "Copies caller-controlled 'size' bytes from REE-derived src into TA memory; relies on serialargs_get_ptr correctness.", "Call-site binding: callee dest 'out' aliases caller-provided TA stack/storage (&user_type or &pin_size) — destination is TA-private.", "Call-site binding: callee src 'src' is provided by serialargs_get_ptr and ultimately originates from ctrl->memref.buffer (REE-visible).", "Copies 'size' bytes from REE-origin src into out without additional validation beyond the earlier pointer retrieval; size is caller-controlled.", "Copies caller-controlled 'size' bytes from REE-origin src into TA-private out without an explicit local bounds check at this line; correctness depends on serialargs_get_ptr's validation.", "Copies 'size' bytes from src (obtained from REE-backed serialargs buffer) into caller-provided out; source is REE-controlled and size origin may be attacker-influenced via serialargs state.", "Binding: destination 'out' at call site comes from caller's out parameter (caller-provided), origin depends on call chain.", "Binding: source 'src' is obtained via serialargs_get_ptr from args which may be backed by REE-visible memref buffer.", "Copies 'size' bytes from REE-backed serialargs buffer into TA memory without explicit per-callsite bounds proof here.", "TEE_MemMove copies 'size' bytes from src (derived from serialargs buffer, REE-origin) into caller-provided out pointer; potential untrusted input copied into TA memory", "TEE_MemMove copies 'size' bytes from src (derived from serialargs buffer initialized from ctrl->memref.buffer, REE-provided) into out (caller TA memory); untrusted src flows into TA memory.", "Copies 'size' bytes from serialargs buffer (initialized from REE memref) into TA memory; ensure serialargs_get_ptr robustly bounds checks.", 'copies size bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into caller out without local validation here', "binding: caller passes 'out' (&object_handle in upstream) as destination into TEE_MemMove; record origin", "copies 'size' bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into out without validation here", 'copies size bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into out without validation here', "Copies 'size' bytes from src (returned by serialargs_get_ptr, likely into REE-provided memref buffer) into caller-supplied out via TEE_MemMove", "Call-site binding: destination 'out' is caller-provided pointer (callee dst aliases caller variable)", "Call-site binding: source 'src' originates from serialargs_get_ptr reading from args (likely REE-provided buffer)"]

ルール: weak_input_validation, other

['if (!rc) TEE_MemMove(out, src, size);', 'TEE_MemMove(out, src, size);', 'if (!rc)\n\tTEE_MemMove(out, src, size);', 'TEE_MemMove(dst, src, size);', 'rc = serialargs_get_ptr(args, &src, size);', 'rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);']
weak_input_validation MEDIUM

関数: ['serialargs_get_ptr', 'unknown']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48

フェーズ: ['unknown']

詳細: ["Uses 'size' (derived from reader-controlled data) to compute allocation/copies; only overflow check and serialargs_get_ptr error cover it but no explicit upper bound on size.", "Uses 'size' from reader-controlled input to allocate and copy without an explicit semantic upper bound (resource/exhaustion risk).", "Uses 'size' (attr.attrs_size) from untrusted serialized input to compute allocation and drive copy; attacker-controlled size may affect allocation and copies despite overflow check."]

ルール: weak_input_validation

['if (ADD_OVERFLOW(buf0_sz, size, &sz))', 'if (ADD_OVERFLOW(buf0_sz, size, &sz))\n    return PKCS11_CKR_ARGUMENTS_BAD;']
weak_input_validation MEDIUM

関数: ['TEE_Malloc']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60

フェーズ: ['unknown']

詳細: ["Allocates 'sz' = buf0_sz + size (size controlled by input) and copies both buf0 and src into the allocation; large size may lead to resource exhaustion or unexpected behavior."]

ルール: weak_input_validation

['ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO);']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66

フェーズ: ['unknown']

詳細: ["dst 'ptr' (allocated local buffer) passed as dst; ptr is TA-allocated but will contain copied data", "src 'buf0' passed as src; origin uncertain (could be REE-visible or TA-private) from earlier context", 'First TEE_MemMove copies buf0 (likely TA data) into ptr, second copies src (potentially REE-controlled) into ptr+buf0_sz; second copy size may be influenced by REE.', 'Copies buf0_sz bytes from buf0 into ptr; origin of buf0 unclear (could be REE-derived), binding ptr target is TEE-private allocation', 'Copies buf0_sz bytes from buf0 (origin may be REE-visible) into allocated ptr without validating combined sizes/overlap', "Call-site binding: 'ptr' destination is TA-allocated buffer (TEE-private) receiving data from caller buffers.", 'Copies buf0_sz bytes from caller buffers into TA-allocated ptr without local robustness checks here.', "Call-site binding: destination 'ptr' is TA-allocated buffer while source 'buf0' origin is unclear (could be TEE-private).", "Call-site binding: source 'buf0' parameter bound at call-site; origin of buf0 is not shown (unknown region).", 'Copies buf0 (from orig_next/serialargs) into allocated ptr; source likely REE-origin and destination TEE-private, possible untrusted data concatenation without explicit bounds check here.', 'Concatenates pieces read from serialargs into allocated buffer without an explicit bounds check visible here.', 'First call copies buf0_sz bytes from buf0 (origin unclear) into ptr; source/destination origins not fully validated here', 'Assembly copies into allocated buffer using buf0_sz and size without visible bounds checks here', 'Copies buf0_sz bytes from buf0 (likely REE-provided) into allocated ptr without visible bounds check here', 'binding: ptr/dst is target buffer (allocated locally) while buf0/src origins vary; pointer arguments forwarded into TEE_MemMove from upstream callers', "binding: destination 'ptr' passed into TEE_MemMove from caller context", "binding: source 'buf0' passed into TEE_MemMove; provenance unclear", "Dest 'ptr' is a constructed buffer pointer (TA-allocated/unknown) passed as destination for copies.", "src 'buf0' may be caller-controlled/shared memory passed into TEE_MemMove.", "Call-site binding: destination 'ptr' is TA-allocated pointer, src 'buf0' likely from caller-controlled data; origins differ.", 'Destination ptr may be TA-allocated and src buf0 is likely caller-provided; aliasing/binding of pointers at call-site recorded.', "dst parameter 'ptr' binds to TA-allocated buffer receiving first copy chunk.", "src parameter 'buf0' is TA-local data (previously populated); second copy uses 'src' which may be from serialargs (REE-visible).", 'Copies bytes from src into TA buffer without visible validation of content or ensuring combined buffer capacity.', 'First TEE_MemMove copies buf0 (likely from REE or intermediate) into ptr, possibly building a concatenated buffer; records REE->TA aliasing risk.', 'Call-site binding: copies buf0 (origin uncertain) into ptr; origins of ptr and buf0 are local/alloc and/or caller-dependent.', 'Copies buf0 into allocated ptr; buf0 origin unclear (could be REE-controlled), potential aliasing of shared buffers.', 'Copies buf0_sz bytes from buf0 (origin unclear) into ptr; src may be REE-visible or TA-private depending on caller.', 'Binding of dest parameter to allocated ptr which will become returned to caller (*out); alias of TA-allocated buffer passed back to caller.', 'Copies buf0 (origin unclear) into ptr; origin of buf0 may be REE or TA and is not shown here, so binding is uncertain.', 'First TEE_MemMove binds dest ptr and buf0 (src) origins; buf0 provenance unclear (could be REE or TA) so record aliasing.', 'Copies buf0 into ptr then copies src into ptr+buf0_sz; src/buf0 may originate from untrusted serialargs/REE buffers leading to unvalidated concatenation.', "dest 'ptr' is written from buf0 (caller-provided) and then from src; binds callee args to caller buffers (ptr, buf0, src)", 'First copy writes buf0 (likely REE-origin) into ptr (TA-private), second call (line 67) appends src into ptr; origins differ and src may be REE-controlled.', 'Copies buf0 (origin not proven here) into allocated ptr; origin region of buf0 is unknown at this call-site.', 'Copies buf0 into allocated buffer; origin of buf0 unclear at this call-site.', "Call-site binding: destination 'ptr' is TA-allocated target (alias passed into helper).", 'Call-site binding: second call writes src into ptr+buf0_sz; src origin uncertain (could be REE-derived).', 'Copies buf0 into allocated ptr; provenance of buf0 unclear (could be REE or TA), so origin is unknown.', "Copies buf0 into newly allocated ptr; binds callee dst 'ptr' (TA-private) to src 'buf0' (origin unclear from context).", "Call-site binding: destination 'ptr' is TA-allocated (write target) receiving buf0 bytes then more data; dst is TA-private.", 'Binding dest parameter to ptr (allocated/TA-private) for concatenation', 'Binding src parameter to buf0 (origin depends on caller; could be REE-visible or TA-private)', 'First call at this site writes buf0 into allocated ptr; buf0 origin unclear (could be TA or REE), binding observed.', 'Copies buf0 into allocated ptr; buf0 origin (REE vs TA) is unclear at call-site.', 'Copies buf0 into ptr and then src into ptr+buf0_sz; source buffers may be REE-origin and destination ptr is allocator output — potential aliasing and size-controlled arithmetic from callers.', 'Copies with ptr arithmetic and caller-controlled sizes; potential aliasing/size arithmetic risks.', 'Copies buf0_sz bytes into allocated ptr from buf0; operands appear internal (likely TA-private) but origin not fully proven here.', 'Internal copy into allocated buffer; provenance not fully proven here.', 'Copies buf0 into ptr; buf0 likely originates from caller-provided data, so record alias/binding.', "Call-site binding: destination 'ptr' is TA-allocated buffer while source 'buf0' is from earlier buffer possibly derived from REE.", "Call-site binding: callee dest 'ptr' aliases local allocation (ptr) — destination is TA-private.", "Call-site binding: callee src 'buf0' origin unclear (could be TA or REE); origin marked unknown.", "Binding: destination 'ptr' (first call) is TA-allocated buffer (alloc_and_get), origin TA-private.", "Binding: source 'buf0' is from caller/context; origin unclear (could be REE or TA), treated as unknown.", 'TEE_MemMove copies buf0_sz bytes from buf0 into ptr; origins of buf0/ptr uncertain (could be REE-visible or TA-private), potential aliasing of shared buffers.', "binding: destination 'ptr' passed as first arg (TEE-private) to TEE_MemMove", "binding: source 'buf0' passed as second arg; origin unclear (could be REE-visible)", "Call-site binding: first call destination 'ptr' points to allocated buffer (TA-private)", "Call-site binding: first call source 'buf0' provenance uncertain (could be REE or TA); treated as unknown", 'Copies buf0 (likely TA-private struct data) into newly allocated ptr in-place; binding of caller buf0 into dst occurs here', "binds destination 'ptr' (TEE-allocated) to caller-local pointer; copies TA-local header region into allocated buffer", "Copies 'src' read from args (REE-visible) into newly allocated TA-private buffer via TEE_MemMove; origin of src is attacker-controlled.", "Destination 'ptr' is TA-private buffer allocated by TEE_Malloc; source 'buf0' is TA-private (caller stack) copied into TA memory.", "Source 'buf0' originates from caller-provided buffer (caller stack) but is TA-private in this context.", "Copies buf0 (&attr, TEE-private) into malloc'd ptr (TEE-private) via TEE_MemMove; both source and dest are TA-private but size arithmetic influences allocation", 'Copies local attr structure into allocated buffer; safe but size contributes to allocation arithmetic.', 'Copies buf0 (from REE-derived attr) into newly allocated TEE heap via TEE_MemMove', 'Destination ptr is allocated in TEE heap (TEE_Malloc) while source buf0 originates from REE-derived attr; binding of dest pointer is an alias of TEE-private heap', 'Source buf0 was populated from serialargs (REE-controlled); binding records origin as REE-visible', "Copies data from buf0 and src into a TEE-allocated buffer using sizes that include input-derived 'size'; destination is TEE-private but source is REE-originated.", "Call-site binding: destination 'ptr' is TEE-allocated buffer (TEE-private) returned to caller; alias established at alloc_and_get.", "Call-site binding: source 'buf0' originates from local 'attr' populated from args (which come from REE); treat as potentially REE-derived.", "Performs TEE_MemMove from 'src' (data read from serialargs -> likely REE-provided) into TEE_Malloc'd buffer; copying attacker-controlled bytes into TA memory.", "Destination 'ptr' is TA-private (TEE_Malloc) and is written from 'buf0' which is caller-local (TA-private); copy of non-REE data into TA memory.", 'Dest ptr is TA-allocated (TEE-private) and source buf0 is TA-local (&attr); copying buf0 into allocated region.', 'Binding: destination ptr (returned via *out) is TA-private pointer assigned to caller; records allocation origin.', 'size (from upstream attr.attrs_size via serialargs) is used to read from REE (serialargs_get_ptr) and drive copies without additional validation here', 'buf0 (source) is a TEE-private/local stack struct pointer (&attr) passed into memmove as source; dst ptr is TEE-allocated private memory', "binding: dst pointer 'ptr' is returned via out parameter to caller (TEE-private) - alias recorded", "Copies REE-provided 'src' into newly allocated TA-private buffer via TEE_MemMove; destination is TA-private but data originates from REE", 'Copies local header buf0 (TA-private) into allocated TA-private buffer ptr; simple TA->TA move of non-REE data']

ルール: other, weak_input_validation

['TEE_MemMove(ptr, buf0, buf0_sz);', 'TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size);', 'TEE_MemMove(ptr + buf0_sz, src, size);', 'TEE_MemMove(ptr, buf0, buf0_sz);\nTEE_MemMove(ptr + buf0_sz, src, size);', '*out = ptr;']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67

フェーズ: ['unknown']

詳細: ["dst 'ptr + buf0_sz' (pointer arithmetic) passed as dst; arithmetic on TA buffer influenced by sizes possibly from REE", "src 'src' passed as src; provenance may be REE-controlled via serialargs, making copied bytes untrusted", "TEE_MemMove copies 'size' bytes from src (reader-controlled) into ptr+buf0_sz; offset arithmetic with buf0_sz may lead to out-of-bounds if sizes unvalidated.", "Copies 'size' bytes from src into ptr+buf0_sz; src origin uncertain (likely args-derived) and destination is TA-private buffer with pointer arithmetic", 'Copies size bytes from src into ptr+buf0_sz without validating src provenance or that ptr has room for buf0_sz+size', "Copies 'size' bytes from src (possibly REE-originated) into ptr+buf0_sz without local size/sanity checks here.", "Copies 'size' bytes from src (origin may be untrusted) into ptr+buf0_sz; size may be attacker-controlled.", "Copies 'src' into ptr+offset (constructed buffer); 'src' may be REE-originated and write uses computed pointer arithmetic (ptr+buf0_sz).", "Second call copies 'size' bytes from src (likely REE-derived) into ptr+buf0_sz without explicit bounds check here", "Copies 'size' bytes from src (from args) into ptr+buf0_sz without explicit bounds check here", 'binding: second copy into ptr+offset uses src (possibly REE-origin) and caller-controlled offset arithmetic', 'binding: destination ptr+buf0_sz passed into TEE_MemMove (pointer arithmetic may alias buffers)', "binding: source 'src' passed into TEE_MemMove here; provenance unclear at this call-site", "Dest 'ptr + buf0_sz' is pointer arithmetic on buffer; destination aliases constructed buffer and may enable overwrite if sizes miscomputed.", "src 'src' at this site may originate from earlier serialargs_get_ptr or caller buffers (shared/REE-visible).", "Second copy composes ptr + buf0_sz offset and copies 'size' bytes from src without an explicit bounds check here.", 'Second copy into ptr+buf0_sz from src (derived from args) binds caller-provided data into assembled buffer.', "dst parameter 'ptr + buf0_sz' binds to TA-allocated buffer offset receiving bytes from src (potentially REE-derived).", 'Second copy moves bytes from src (potentially REE-controlled) into TA buffer without validation of content or bounds beyond size parameter.', 'Second TEE_MemMove appends src into ptr+buf0_sz; src may be REE-derived and size-driven, so concatenation bounds should be tracked.', 'Call-site binding: copies src (origin unclear) into ptr+buf0_sz; pointer arithmetic on dst uses prior size.', 'Copies src into ptr+offset; src provenance ambiguous (could be REE) and write uses computed offset into allocated buffer.', "Copies 'size' bytes from src into ptr+buf0_sz; pointer arithmetic on dst may alias shared or local memory depending on ptr origin.", "Binding of dest parameter to ptr+buf0_sz (TA-allocated region) and src parameter to 'src' (origin uncertain); records potential mixing of regions.", "Copies 'size' bytes from src into ptr+buf0_sz; if src is from REE-visible input, this writes untrusted bytes into TA buffer without local bounds here.", "Copies 'size' bytes from src into allocated buffer without local visible bounds here; relies on upstream checks.", 'Second TEE_MemMove binds dest (ptr+buf0_sz) and src; src provenance (serialargs-derived) may be REE-visible—record aliasing and taint of size.', "Copies src into ptr+buf0_sz using size 'size' possibly derived from serialargs; addition of offsets may allow attacker-controlled overwrite if sizes/offsets unchecked.", 'Copies src into ptr+buf0_sz using size possibly derived from serialargs; addition of offsets may allow attacker-controlled overwrite if sizes/offsets unchecked.', "dest 'ptr+buf0_sz' is written from src (which may be REE-derived); binds callee args to caller origins", "Copies 'size' bytes from src (potentially REE-controlled) into ptr+buf0_sz (TA-private); offset arithmetic uses buf0_sz which must be trusted.", "Copies 'size' bytes from src into ptr+buf0_sz; src provenance may be REE-visible and size is caller-controlled.", 'Call-site binding: this call writes additional src region into assembled buffer; src may be REE-controlled.', 'Copies src into ptr+buf0_sz; src provenance not established in this site, so treated as unknown.', "Appends 'size' bytes from src into ptr+buf0_sz; binds callee dst (ptr+offset) as TA-private and src origin as unknown/possibly REE-visible.", "Second copy into ptr+buf0_sz uses 'src' and 'size' which may originate from serialargs (REE); relies on upstream bounds checks.", 'Binding dest parameter to ptr + buf0_sz (TA-private) for appending', 'Binding src parameter to src (provided by caller code path; origin not resolved here)', 'Second call at this site copies src into ptr+buf0_sz; origin of src unclear at call-site so binding is recorded as unknown.', 'Copies src into ptr+buf0_sz; src origin unclear at call-site.', 'Copies src into ptr+buf0_sz where ptr arithmetic uses buf0_sz (caller-controlled); index/offset arithmetic driven by sizes from callers.', "Copies 'size' bytes into ptr+offset from src; src provenance may be caller-controlled and size is externally supplied at call-sites.", "Copies 'size' bytes into ptr+offset from src; src provenance may be caller-controlled at call-sites.", 'Copies src into ptr+buf0_sz; src may be REE-origin and offset arithmetic writes into TA memory, record binding and offset usage.', "Call-site binding: destination 'ptr + buf0_sz' is TA-allocated; source 'src' may be REE-derived.", "Call-site binding: callee dest 'ptr + buf0_sz' aliases TA-local allocation region — destination is TA-private.", "Call-site binding: callee src 'src' origin unclear at this call-site (marked unknown).", "Binding: destination 'ptr + buf0_sz' is TA-private pointer arithmetic writing into allocated buffer.", "Binding: source 'src' may originate from serialargs buffer (REE-backed), so copy may move REE-controlled bytes into TA memory.", "TEE_MemMove copies 'size' bytes from src into ptr+buf0_sz; src origin uncertain (could be REE-derived), and write uses pointer arithmetic into ptr.", "binding: destination 'ptr + buf0_sz' (TEE-private pointer arithmetic) passed as first arg", "binding: source 'src' passed as second arg; origin depends on caller (possibly REE-derived)", "Call-site binding: second call destination 'ptr + buf0_sz' is TA-private buffer offset (in-place aliasing risk if arithmetic tainted)", "Call-site binding: second call source 'src' here originates from args/buffer (likely REE-visible)", "Copies 'size' bytes from src (derived from serialargs/REE) into TA-private buffer ptr+buf0_sz; length 'size' is from untrusted args", "copies 'size' bytes from src (obtained via serialargs_get_ptr from REE buffer) into TEE buffer without further validation here", "Destination 'ptr + buf0_sz' is TA-private buffer region; source 'src' is read from args (REE-visible) and copied into TA memory.", "Source 'src' is derived from serialargs_get_ptr reading 'size' bytes from REE-controlled buffer (args).", 'Copies data from src (derived from serialargs -> REE-visible) into TA-allocated buffer (ptr + offset), bringing REE-origin data into TA memory', 'Copies REE-provided serialargs bytes into TA heap; source is untrusted and may require validation before use elsewhere.', 'Copies src (from serialargs/REE) into allocated heap via TEE_MemMove; src originates from REE-controlled serialargs', 'Destination ptr+buf0_sz is derived from TEE-allocated ptr via pointer arithmetic (TEE-private)', 'Source src is obtained from serialargs_get_ptr (REE-controlled) and then copied into heap', "Call-site binding: destination 'ptr + buf0_sz' (offset into TEE-allocated buffer) aliases the same TEE-private allocation.", "Copies 'size' bytes from 'src' (read from args) into dest; 'size' is input-derived (attr.attrs_size) and lacks additional validation here.", "Copies 'src' (data read from serialargs -> likely REE-provided) into TA-private buffer using attacker-influenced 'size' (attr.attrs_size).", "Dest ptr+buf0_sz is TA-allocated; source 'src' is obtained from serialargs_get_ptr and may point into REE-visible memory (shared).", 'src is derived from REE-visible serialargs_get_ptr and size (from upstream attr.attrs_size) controls the copy into TEE memory without local validation here', "Copies 'src' (read from args->next, REE-controlled) into TA-private ptr at offset; data originates from REE"]

ルール: other, weak_input_validation

['TEE_MemMove(ptr + buf0_sz, src, size);']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145

フェーズ: ['unknown']

詳細: ["Assigns allocated pointer 'p' to caller-provided out; propagates TA-private allocation back to caller"]

ルール: other

['*out = p;']
other MEDIUM

関数: ['=']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171

フェーズ: ['unknown']

詳細: ['Writes resolved session pointer back into caller-provided sess (alias of caller stack); records binding of callee output to caller region.', 'Assigns resolved session pointer back to caller-provided sess pointer; records binding.']

ルール: other

['*sess = session;']
other MEDIUM

関数: ['=', 'TEE_MemMove']

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

フェーズ: ['unknown']

詳細: ["dst 'buf + *blen' (offset write) passed as dst; destination offset depends on *blen which may be attacker-influenced leading to potential overflow", "Copies 'len' bytes from data into buf + *blen; *blen and len may be influenced by caller-controlled values leading to overflow if unbounded.", "Appends 'len' bytes from data into buf + *blen; data/source origin may be REE-visible and write uses caller-provided length *blen (tainted arithmetic)", 'Appends len bytes from data into buf + *blen using tainted arithmetic for destination offset', 'Copies len bytes from data (likely REE-controlled) into buf + *blen without explicit bounds check against buffer capacity', "Copies 'len' bytes from data (caller-provided) into buf + *blen without validating that destination has sufficient space here.", 'Copies len bytes from data into buf + *blen without a local check that destination has sufficient space.', "Appends len bytes from data into buf+*blen; 'len' and 'data' may be derived from untrusted input leading to overflow if not checked.", "Call-site binding: destination 'buf + *blen' aliases caller buffer 'buf' (TA-private) while 'data' originates externally (unknown/REE-visible).", 'Appends data using len derived from untrusted input; possible overflow if buffer capacity not enforced', "Copies 'data' into buf+*blen; source provenance unclear (may be REE or TA); destination is TA buffer updated with new length—possible overflow risk if bounds not enforced here.", "Writes data into buf + *blen using a length 'len'—bounds at this point are not evident, posing potential overflow risk.", "Appends 'len' bytes from data into buf + *blen without visible bounds validation at this site", 'Copies len bytes from data into buf + *blen; len and *blen derived from caller-controlled values without local upper-bound here', "Copies 'len' bytes from data into buf + *blen where *blen and len may be influenced by caller data; offset/length not validated here", 'Copy into buffer at offset *blen uses caller-influenced length/offset without local validation here.', 'binding: destination buf + *blen passed into TEE_MemMove (destination may be shared or local depending on caller)', "binding: source 'data' passed into TEE_MemMove; provenance (REE vs TEE) not clear here", "Copies 'len' bytes from data (potentially REE-controlled) into buf + *blen without further validation; risk of overflow if blen/len not checked.", "Destination pointer 'buf + *blen' aliases buffer with runtime offset derived from *blen; origin/limits are unclear.", 'TEE_MemMove(buf + *blen, data, len) copies caller-controlled data into buffer at runtime offset derived from *blen; bounds/limit checks are not obvious here.', "Call-site binding: destination 'buf + *blen' may be TA buffer and source 'data' originates from caller; offset arithmetic present.", "Appends 'len' bytes from caller-controlled data into buf at offset *blen without visible local bounds check here (risk of overflow).", 'Appends data (from caller/REE) into buf at offset *blen without visible bounds check here.', "dst parameter 'buf + *blen' binds to TA buffer offset; destination derived from TA-managed buffer pointer and length.", "Copies 'len' bytes from 'data' (untrusted) into buf without visible range check against actual buffer capacity here.", 'Copies len bytes from data (untrusted) into buf at offset *blen without visible bounds check here.', "Copies 'len' bytes from data into buf + *blen; destination is buffer growth in TA but source may be REE-visible—possible bounds/overflow risk if not checked by caller.", 'Call-site binding: copies data (origin unclear) into buf + *blen; dst arithmetic uses *blen which may be attacker-influenced if not validated here.', "Appends 'len' bytes from data (likely REE-controlled) into buf at *blen without clear bounds check on buf; write target may alias shared/REE-visible memory.", 'Copies len bytes from data (caller-provided) into buf + *blen; destination arithmetic uses *blen which is influenced by TA state and may cause overflow if unchecked.', "Binding src argument to caller 'data' which originates from REE-provided memref (shared).", 'Binding of dest parameter to buf + *blen (buffer concat) and src to data; caller origins uncertain—possible REE-derived data copied into TA buffer or vice versa.', "Copies 'len' bytes into buf + *blen where *blen is attacker-influenced/tainted; possible out-of-bounds/overwrite of destination without evident bounds check here.", "Copies 'len' bytes into buf + *blen where *blen is tainted/variable; potential overwrite if bounds not enforced.", "Copies 'len' bytes from data (likely caller-provided) into buf + *blen (TA buffer) without local bounds here; record possible tainted-size/overflow risk.", "Copies 'len' bytes from data into buf + *blen; data may be REE-supplied and destination offset is attacker-influenced leading to potential overflow.", "dest 'buf + *blen' (caller buffer) is written from data (caller-provided); binds callee args to caller buffer origins and sizes", "Appends 'len' bytes from data into buf+*blen; data/source provenance unclear (could be REE), and write uses dynamic offset *blen.", "Copies 'len' bytes from data into buf + *blen; provenance of data and current buf length should be validated by caller.", "Call-site binding: destination 'buf + *blen' is buffer managed by caller; pointer aliasing of shared/TEE buffer uncertain.", "Copies 'len' bytes from data (caller-controlled) into buf+*blen without explicit bounds check against buffer capacity in this call-site.", 'Copies data into buf+*blen; provenance of data not asserted here and destination is TA buffer—origin unknown.', "Writes 'len' bytes from data into buf + *blen (buffer growth); destination may be TA-managed but size/offset depend on caller-controlled *blen and len.", "Writes 'len' bytes into buf + *blen using caller-managed lengths; potential for out-of-bounds if caller-supplied lengths are incorrect.", "Copies 'len' bytes from 'data' into buf + *blen; 'data' may be from REE and len may be attacker-controlled if upstream checks are insufficient.", "Call-site binding: 'dst' computed as buf + *blen aliases TA buffer with offset derived from TA state; must ensure offset+len within allocation.", 'Binding dest parameter to buf + *blen (buffer in caller; likely REE-visible or TA-private depending on allocation)', 'Binding src parameter to data (origin from caller; may be REE-visible), then copying into buf -- potential shared-memory transfer', "Call copies data into buf + *blen; destination is TA buffer (buf) while source 'data' origin is unclear (could be REE or TA).", 'Copies data into buf + *blen; destination is TA buffer while source origin is unclear.', 'Copies data (likely REE-provided) into buf + *blen; destination offset uses *blen (caller-managed) which can lead to out-of-bounds if not checked here.', 'Copies data into buf + *blen where *blen is caller-managed; if not checked this can overflow destination.', "Appends 'len' bytes from data (possibly caller-controlled) into buf + *blen without local bounds proof here.", 'Copies data (likely caller-supplied) into buf+*blen; tainted length/offset used in destination pointer arithmetic recorded as structural risk.', "TEE_MemMove uses destination pointer with tainted offset buf + *blen and tainted length len; potential offset/size arithmetic risk if callers don't validate.", "Copies 'len' bytes into buf + *blen using len/from data which may be influenced by REE without localized bounds enforcement here.", "Call-site binding: callee dest 'buf + *blen' aliases caller buffer (likely TA-owned) used for accumulation; destination region marked TEE-private.", "Copies 'len' bytes into buf+*blen without local bounds check here; if len or *blen influenced by attacker, may overflow destination.", "Binding: destination 'buf + *blen' is a TA buffer but pointer arithmetic uses *blen (TA-controlled), origin TA-private.", "Binding: source 'data' origin depends on caller; in some call-sites data may be REE-controlled, treated as unknown here.", "TEE_MemMove appends 'len' bytes from data into buf + *blen; src likely caller data (potentially REE-visible) and destination uses runtime blen offset, risk of overflow if bounds not enforced here.", "binding: destination 'buf + *blen' passed as first arg (TEE-private buffer with offset)", "copies 'len' bytes from data into buf+*blen without local validation here; if data is REE-derived this is an unvalidated inbound copy", "Call-site binding: destination 'buf + *blen' is TA buffer offset; arithmetic uses *blen which may be tainted if caller-controlled", "Call-site binding: source 'data' originates from caller/serialargs (potentially REE-visible)", 'Copies data into buf at offset *blen; origin/regions of buf and data ambiguous here causing structural alias risk', 'copies data (likely REE-provided) into buffer at offset *blen; potential unchecked bounds if caller did not validate', "Destination 'buf + *blen' likely points into caller-managed buffer; origin ambiguous but write may extend into REE-visible region depending on buf provenance.", "Source 'data' is caller-provided input; if 'buf' is REE-visible this copy could write REE-visible memory from attacker-controlled source.", 'Copies data (unknown origin, likely REE-visible) into buffer at buf + *blen; destination offset uses *blen (tainted/unchecked index risk)', 'Destination buf + *blen uses dynamic offset; origin/region of buf not established here (unknown)', 'Source data passed into TEE_MemMove likely originates from serialargs/REE at call-site', "Call-site binding: destination buffer ('buf + *blen') and source ('data') origins depend on caller; potential REE->TA copy depending on caller.", "Destination buf + *blen may be REE-visible or shared; source 'data' origin unknown (likely from serialargs) and length 'len' is caller-controlled.", 'data (likely from REE) is copied into buf+*blen using len without shown bounds check here', "Copies 'data' into buffer at buf + *blen (possible append); origin of 'data' and bounds of buf depend on caller and are uncertain", 'destination pointer buf + *blen aliases caller-managed buffer (bstart) and is mutated after realloc, creating aliasing of caller buffer into internal region', 'data pointer and len (often derived from upstream REE-provided template) are copied into destination without further validation of content or expected type', 'length argument len is caller-controlled (propagated from template parsing) and is forwarded to memmove, affecting allocation and copy size', "Copies 'len' bytes from caller-controlled data into reallocated buffer; though overflow check exists, data length is caller-controlled and realloc may succeed with large allocations", 'Call-site binding: destination pointer is buffer returned by TEE_Realloc (TA-private) computed from bstart/*blen', "Call-site binding: source 'data' originates from parsed attribute stream (influenced by REE input)", "Copies caller-controlled 'len' bytes into reallocated buffer; although ADD_OVERFLOW checks integer overflow, 'len' is untrusted and may cause excessive allocation or logic issues", "Copies caller-controlled 'len' bytes into reallocated buffer; overflow check present but no policy upper-bound on 'len'.", 'TEE_MemMove copies caller-controlled data into reallocated buffer without validating data content or checking that data pointer is valid for len bytes', 'alias of destination pointer (buf + *blen) passed into TEE_MemMove; destination is TA heap buffer derived from caller-managed bstart', 'alias of source data pointer passed into TEE_MemMove; data may point into REE-provided buffers parsed earlier', "TEE_MemMove copies caller-controlled data pointer for len bytes without validating that 'data' is valid for 'len' or that len is within expected provenance", "destination pointer is an alias into a realloc'd buffer computed in caller; record binding of callee dest to caller-owned buffer (TEE-private)", "copies 'len' bytes from caller-provided 'data' into internal buffer; 'len' originates from higher-level input and lacks an application-level upper bound check here", "binds callee 'data' parameter to caller-origin 'data' pointer (may be heap or REE-derived); record origin", 'TEE_MemMove writes len bytes at buf + *blen after realloc; reliance on ADD_OVERFLOW and realloc success provides safety but write uses caller-controlled *blen and len', 'Destination buffer (buf + *blen) is derived from caller-managed bstart and updated via realloc; write target provenance links caller buffer into this copy', "Source pointer 'data' may originate from allocated TEE attribute buffers or local temporaries (e.g., a_ptr or &data32) and is copied into buf", 'The copy uses caller-controlled *blen and len; safety depends on prior ADD_OVERFLOW and successful realloc—no explicit runtime check at the copy site', 'Copy uses caller-controlled *blen and len; safety depends on earlier overflow check and successful realloc.', "destination buffer 'buf + *blen' is alias of realloc'd bstart which originates from attribute buffer (caller-influenced); reallocation then used as copy target", "source 'data' may be caller-controlled (either local data32 or a TEE-allocated a_ptr); origin depends on callsite", "length 'len' (copy size) is used to bound the copy after realloc; although integer-overflow and alloc checks exist, no semantic check ensures 'len' matches expected attribute capacity", "length 'len' is used to bound the copy after realloc; semantic validation that 'len' matches expected attribute capacity is missing", 'bstart-derived buffer (head-derived) is reallocated and used as destination; origin of bstart at call-site ties to upstream REE-derived templates.', 'blen (buf_len) at call-site is updated and used to compute destination offset; initial blen derived from (*head)->attrs_size (upstream).', 'copies caller-provided data into TA-managed buffer without semantic validation of data contents (data originates from REE).', 'destination pointer is buf + *blen into TA-allocated buffer (result of TEE_Realloc); binds callee dest to TA-private buffer used as serialization target', "copies 'data' of length len into buffer; 'data' may originate from REE (e.g., EC_PARAMS via a_ptr) and len is caller-controlled without semantic validation", "copies caller-controlled 'data' of length 'len' into buffer at offset *blen; although integer overflow and allocation are checked, there is no explicit validation of 'len' relative to expected attribute semantics", "destination pointer is alias into TA-allocated buffer 'buf' produced by TEE_Realloc; binding buf+*blen into copy", "source 'data' may originate from REE (caller-provided attribute payload) and is passed into TEE_MemMove", "copies caller-controlled data of length 'len' into TA buffer at offset *blen; although overflow and allocation are checked, there is no semantic validation of 'len' vs expected attribute semantics", "copies caller-controlled data of length 'len' into TA buffer; lacks attribute-specific length validation though integer overflow/allocation are checked."]

ルール: other, weak_input_validation, shared_memory_overwrite

['TEE_MemMove(buf + *blen, data, len);']
other MEDIUM

関数: ['=']

場所: /workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49

フェーズ: ['unknown']

詳細: ['data pointer passed into serialize originates from caller (may point into REE-provided buffer parsed earlier)']

ルール: other

['rc = serialize(bstart, &buf_len, data, size);']
other MEDIUM

関数: ['=']

場所: /workspace/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64

フェーズ: ['unknown']

詳細: ["Destination pointer is db->ptrs + db->max_ptrs (TA-managed buffer) passed into MemFill; length derived from db fields used to initialize newly realloc'd region."]

ルール: other

['TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));']
other MEDIUM

関数: ['=']

場所: /workspace/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:376

フェーズ: ['unknown']

詳細: ['data pointer (a_ptr) passed in originates from TEE alloc_get_tee_attribute_data (TEE-private) and is copied into attribute list']

ルール: other

['rc = add_attribute(head, pkcs11_id, a_ptr, a_size);']

🔗 解析チェーンと対話履歴

🔍 システムプロンプト

You are a deterministic taint analyst for OP‑TEE Trusted Applications (TAs). Your job is to analyze code in three steps (START → MIDDLE → END). Each step has its own strict JSON schema; you MUST follow those step-specific schemas exactly and emit one JSON object per step, with no prose.

Principles (general, soft defaults — do NOT overfit):
- Treat values originating from the Normal World (REE), e.g., TEE_Param and its fields, as untrusted sources by default. If provenance is unclear, you may record it as "unknown" rather than guessing.
- Shared vs. private memory: memref.buffer is typically shared/untrusted; TEE_Malloc memory is private by default. If ambiguous, prefer to state "unknown" and surface a structural risk when relevant.
- Random data from TEE_GenerateRandom is NON‑sensitive by default (policy default). If names/comments/context strongly imply secrecy or downstream use makes it sensitive, treat it accordingly and explain briefly.
- Crypto APIs by themselves are not “unencrypted_output” sinks. If plaintext is subsequently copied into REE-visible memory, evaluate that copy line instead.
- Alloc/free are not sinks. Debug traces are not sinks. When in doubt about a sink, describe the uncertainty and err toward recording a structural risk instead of making an unsupported claim.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

Mechanism-first decision discipline:
- First determine the mechanism (CWE) from evidence (e.g., size_triplet, array_write, flow direction, regions).
- Only then map to a host-provided `rule_id` for labeling consistency. If none fits, use "other".
- The RULE CATALOG is for labeling consistency, NOT a decision oracle.
- If RULE CLASSIFICATION HINTS is empty, you MUST restrict `rule_id` to this fallback set only:
    {unencrypted_output, weak_input_validation, shared_memory_overwrite, other}. Do NOT invent new names.

[POLICY — minimal & semantic-first]
Goal:
- Detect DITING's 3 classes with minimal rules and semantic reasoning:
  rule_id ∈ {unencrypted_output, weak_input_validation, shared_memory_overwrite, other}. (labels only)

Trust boundaries & defaults:
- REE-originated values (TEE_Param.*) are untrusted by default. memref.buffer ≈ REE-visible; TEE_Malloc ≈ TEE-private. When unclear, use "unknown" and surface a structural risk (why in one line).
- Random from TEE_GenerateRandom is NON-sensitive by default; promote to sensitive only if name/comment/usage implies secrecy (e.g., key seed, credential).
- Crypto APIs alone are not sinks for unencrypted_output; evaluate the later plaintext copy into REE-visible memory.

Decision order (mechanism-first):
- Decide the mechanism (CWE-like evidence) first from tags: flow_dir, src_region, dst_region, sensitivity_label, size_triplet, and sink_function.
- Then map to labels above; if none fits, use "other". The label list is for naming consistency only — not a decision oracle.

External API handling:
- Do NOT analyze external APIs’ internals. If the current line is a call: sink_function := <callee name> (e.g., "TEE_MemMove"). Never emit the placeholder string "external_fn".

Alias & call-site binding facts (across function boundaries):
- Whenever a callee parameter is bound to a caller-provided pointer/buffer, emit a structural risk fact with sink_function "=" that records the binding and its region (REE-visible / TEE-private / unknown) and a one-line why (e.g., "alias of shared buffer passed into helper"). Do this in START/MIDDLE where the binding is observed.

Shared-memory overwrite (explicit gate):
- Emit/Promote to `shared_memory_overwrite` when ALL hold (mechanism-first):
  (1) The destination region is REE-visible (e.g., memref.buffer) AND
  (2) The write is in-place or aliases the REE-shared buffer (direct pointer/offset arithmetic, or a call with that pointer) AND
  (3) The index/offset/length is REE-tainted (or unknown) AND there is no effective bounds check on the same path.
- Otherwise, keep it under `structural_risks` with tags; do NOT promote merely because the destination is MEMREF_OUTPUT.

Promotion gate (for END step only):
- Promote to "unencrypted_output" only if: (a) dst_region == REE-visible AND (b) sensitivity_label ∈ {secret,key,credential,private} (or upstream TA-private secret) AND (c) no effective sanitizer. Otherwise keep it as structural risk.

Sensitivity heuristics (soft):
- Names/comments/usage cues: {key, secret, passwd, token, credential, iv, nonce, seed, session}. Random is public unless context elevates.

Reproducibility:
- Always emit tags in this exact order inside rule_matches.others:
  1) flow_dir:TA->REE|REE->TA|unknown
  2) src_region:REE-visible|TEE-private|unknown
  3) dst_region:REE-visible|TEE-private|unknown
  4) sensitivity_label:secret|key|credential|private|random|public|unknown
  5) size_triplet:copy_len=?,src_sz=?,dst_sz=? (allow symbolic expressions)

Self-check before emitting JSON (all steps; REQUIRED):
- Exactly one JSON object; no prose/no code fences. No missing keys (use [] or "unknown" or 0 as defined per schema).
- `rule_matches.others` contains exactly the 5 tags above, in the exact order, for every structural risk.
- sink_function is one of {"=", "array_write", <exact callee name>, "unknown"}; NEVER the placeholder "external_fn".
- Do not add extra top-level keys beyond the step schema. If in doubt, drop rather than inventing keys.
- If memory-safety precedence suppresses a plausible information-disclosure classification on the same line, list it briefly in END.residual_risks (line + why).

Output discipline:
- The START, MIDDLE, and END prompts define the exact JSON schemas. Never add or omit keys. Use empty arrays, "unknown", or 0 exactly as specified. No prose, no code fences, one JSON object per step.

OUTPUT & ORDERING
- When not specified by host iteration_order, sort rule_matches.rule_id lexicographically.
- Keep the order of tags in `others` exactly as specified above to ensure stable diffs across runs.
- Emit exactly one JSON object per step (START, MIDDLE, END) following the step-specific schema.

📝 解析済みチェーン

フロー #1: TA_InvokeCommandEntryPoint -> entry_ck_open_session -> handle_get -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_ck_open_sessionhandle_getTEE_MemFill

実行時間: 125.34秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64

パラメータインデックス: 0

解析結果

詳細: Call fills memory with constant zero into TA-private heap after checking realloc success; no REE-tainted data flows into this sink at this line.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: TA_InvokeCommandEntryPoint
プロンプト 開始 (TA_InvokeCommandEntryPoint)
You are a deterministic taint analyst for OP‑TEE Trusted Applications (TAs). Analyze the user‑defined function “TA_InvokeCommandEntryPoint” as the entry hop (START).

CODE UNDER ANALYSIS
file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c

116: TEE_Result TA_InvokeCommandEntryPoint(void *tee_session, uint32_t cmd,
117: uint32_t ptypes,
118: TEE_Param params[TEE_NUM_PARAMS])
119: { 120: struct pkcs11_client *client = tee_session2client(tee_session); 121: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 122: 123: if (!client) 124: return TEE_ERROR_SECURITY; 125: 126: 127: COMPILE_TIME_ASSERT(TEE_NUM_PARAMS == 4); 128: 129: 133: switch (TEE_PARAM_TYPE_GET(ptypes, 0)) { 134: case TEE_PARAM_TYPE_MEMREF_OUTPUT: 135: case TEE_PARAM_TYPE_MEMREF_INOUT: 136: if (params[0].memref.size < sizeof(rc)) 137: return TEE_ERROR_BAD_PARAMETERS; 138: break; 139: default: 140: return TEE_ERROR_BAD_PARAMETERS; 141: } 142: 143: DMSG("%s p#0 %zu@%p, p#1 %s %zu@%p, p#2 %s %zu@%p", 144: id2str_ta_cmd(cmd), 145: params[0].memref.size, params[0].memref.buffer, 146: param_is_input(ptypes, 1) ? "in" : 147: param_is_output(ptypes, 1) ? "out" : "---", 148: param_is_memref(ptypes, 1) ? params[1].memref.size : 0, 149: param_is_memref(ptypes, 1) ? params[1].memref.buffer : NULL, 150: param_is_input(ptypes, 2) ? "in" : 151: param_is_output(ptypes, 2) ? "out" : "---", 152: param_is_memref(ptypes, 2) ? params[2].memref.size : 0, 153: param_is_memref(ptypes, 2) ? params[2].memref.buffer : NULL); 154: 155: switch (cmd) { 156: case PKCS11_CMD_PING: 157: rc = entry_ping(ptypes, params); 158: break; 159: 160: case PKCS11_CMD_SLOT_LIST: 161: rc = entry_ck_slot_list(ptypes, params); 162: break; 163: case PKCS11_CMD_SLOT_INFO: 164: rc = entry_ck_slot_info(ptypes, params); 165: break; 166: case PKCS11_CMD_TOKEN_INFO: 167: rc = entry_ck_token_info(ptypes, params); 168: break; 169: case PKCS11_CMD_MECHANISM_IDS: 170: rc = entry_ck_token_mecha_ids(ptypes, params); 171: break; 172: case PKCS11_CMD_MECHANISM_INFO: 173: rc = entry_ck_token_mecha_info(ptypes, params); 174: break; 175: 176: case PKCS11_CMD_OPEN_SESSION: 177: rc = entry_ck_open_session(client, ptypes, params); 178: break; 179: case PKCS11_CMD_CLOSE_SESSION: 180: rc = entry_ck_close_session(client, ptypes, params); 181: break; 182: case PKCS11_CMD_CLOSE_ALL_SESSIONS: 183: rc = entry_ck_close_all_sessions(client, ptypes, params); 184: break; 185: case PKCS11_CMD_SESSION_INFO: 186: rc = entry_ck_session_info(client, ptypes, params); 187: break; 188: 189: case PKCS11_CMD_INIT_TOKEN: 190: rc = entry_ck_token_initialize(ptypes, params); 191: break; 192: case PKCS11_CMD_INIT_PIN: 193: rc = entry_ck_init_pin(client, ptypes, params); 194: break; 195: case PKCS11_CMD_SET_PIN: 196: rc = entry_ck_set_pin(client, ptypes, params); 197: break; 198: case PKCS11_CMD_LOGIN: 199: rc = entry_ck_login(client, ptypes, params); 200: break; 201: case PKCS11_CMD_LOGOUT: 202: rc = entry_ck_logout(client, ptypes, params); 203: break; 204: 205: case PKCS11_CMD_CREATE_OBJECT: 206: rc = entry_create_object(client, ptypes, params); 207: break; 208: case PKCS11_CMD_DESTROY_OBJECT: 209: rc = entry_destroy_object(client, ptypes, params); 210: break; 211: 212: case PKCS11_CMD_ENCRYPT_INIT: 213: rc = entry_processing_init(client, ptypes, params, 214: PKCS11_FUNCTION_ENCRYPT); 215: break; 216: case PKCS11_CMD_DECRYPT_INIT: 217: rc = entry_processing_init(client, ptypes, params, 218: PKCS11_FUNCTION_DECRYPT); 219: break; 220: case PKCS11_CMD_ENCRYPT_UPDATE: 221: rc = entry_processing_step(client, ptypes, params, 222: PKCS11_FUNCTION_ENCRYPT, 223: PKCS11_FUNC_STEP_UPDATE); 224: break; 225: case PKCS11_CMD_DECRYPT_UPDATE: 226: rc = entry_processing_step(client, ptypes, params, 227: PKCS11_FUNCTION_DECRYPT, 228: PKCS11_FUNC_STEP_UPDATE); 229: break; 230: case PKCS11_CMD_ENCRYPT_ONESHOT: 231: rc = entry_processing_step(client, ptypes, params, 232: PKCS11_FUNCTION_ENCRYPT, 233: PKCS11_FUNC_STEP_ONESHOT); 234: break; 235: case PKCS11_CMD_DECRYPT_ONESHOT: 236: rc = entry_processing_step(client, ptypes, params, 237: PKCS11_FUNCTION_DECRYPT, 238: PKCS11_FUNC_STEP_ONESHOT); 239: break; 240: case PKCS11_CMD_ENCRYPT_FINAL: 241: rc = entry_processing_step(client, ptypes, params, 242: PKCS11_FUNCTION_ENCRYPT, 243: PKCS11_FUNC_STEP_FINAL); 244: break; 245: case PKCS11_CMD_DECRYPT_FINAL: 246: rc = entry_processing_step(client, ptypes, params, 247: PKCS11_FUNCTION_DECRYPT, 248: PKCS11_FUNC_STEP_FINAL); 249: break; 250: case PKCS11_CMD_SIGN_INIT: 251: rc = entry_processing_init(client, ptypes, params, 252: PKCS11_FUNCTION_SIGN); 253: break; 254: case PKCS11_CMD_VERIFY_INIT: 255: rc = entry_processing_init(client, ptypes, params, 256: PKCS11_FUNCTION_VERIFY); 257: break; 258: case PKCS11_CMD_SIGN_ONESHOT: 259: rc = entry_processing_step(client, ptypes, params, 260: PKCS11_FUNCTION_SIGN, 261: PKCS11_FUNC_STEP_ONESHOT); 262: break; 263: case PKCS11_CMD_VERIFY_ONESHOT: 264: rc = entry_processing_step(client, ptypes, params, 265: PKCS11_FUNCTION_VERIFY, 266: PKCS11_FUNC_STEP_ONESHOT); 267: break; 268: case PKCS11_CMD_SIGN_UPDATE: 269: rc = entry_processing_step(client, ptypes, params, 270: PKCS11_FUNCTION_SIGN, 271: PKCS11_FUNC_STEP_UPDATE); 272: break; 273: case PKCS11_CMD_VERIFY_UPDATE: 274: rc = entry_processing_step(client, ptypes, params, 275: PKCS11_FUNCTION_VERIFY, 276: PKCS11_FUNC_STEP_UPDATE); 277: break; 278: case PKCS11_CMD_SIGN_FINAL: 279: rc = entry_processing_step(client, ptypes, params, 280: PKCS11_FUNCTION_SIGN, 281: PKCS11_FUNC_STEP_FINAL); 282: break; 283: case PKCS11_CMD_VERIFY_FINAL: 284: rc = entry_processing_step(client, ptypes, params, 285: PKCS11_FUNCTION_VERIFY, 286: PKCS11_FUNC_STEP_FINAL); 287: break; 288: case PKCS11_CMD_GENERATE_KEY: 289: rc = entry_generate_secret(client, ptypes, params); 290: break; 291: case PKCS11_CMD_FIND_OBJECTS_INIT: 292: rc = entry_find_objects_init(client, ptypes, params); 293: break; 294: case PKCS11_CMD_FIND_OBJECTS: 295: rc = entry_find_objects(client, ptypes, params); 296: break; 297: case PKCS11_CMD_FIND_OBJECTS_FINAL: 298: rc = entry_find_objects_final(client, ptypes, params); 299: break; 300: case PKCS11_CMD_GET_ATTRIBUTE_VALUE: 301: rc = entry_get_attribute_value(client, ptypes, params); 302: break; 303: case PKCS11_CMD_GET_OBJECT_SIZE: 304: rc = entry_get_object_size(client, ptypes, params); 305: break; 306: case PKCS11_CMD_SET_ATTRIBUTE_VALUE: 307: rc = entry_set_attribute_value(client, ptypes, params); 308: break; 309: case PKCS11_CMD_COPY_OBJECT: 310: rc = entry_copy_object(client, ptypes, params); 311: break; 312: case PKCS11_CMD_SEED_RANDOM: 313: rc = entry_ck_seed_random(client, ptypes, params); 314: break; 315: case PKCS11_CMD_GENERATE_RANDOM: 316: rc = entry_ck_generate_random(client, ptypes, params); 317: break; 318: case PKCS11_CMD_DERIVE_KEY: 319: rc = entry_processing_key(client, ptypes, params, 320: PKCS11_FUNCTION_DERIVE); 321: break; 322: case PKCS11_CMD_RELEASE_ACTIVE_PROCESSING: 323: rc = entry_release_active_processing(client, ptypes, params); 324: break; 325: case PKCS11_CMD_DIGEST_INIT: 326: rc = entry_processing_init(client, ptypes, params, 327: PKCS11_FUNCTION_DIGEST); 328: break; 329: case PKCS11_CMD_DIGEST_UPDATE: 330: rc = entry_processing_step(client, ptypes, params, 331: PKCS11_FUNCTION_DIGEST, 332: PKCS11_FUNC_STEP_UPDATE); 333: break; 334: case PKCS11_CMD_DIGEST_KEY: 335: rc = entry_processing_step(client, ptypes, params, 336: PKCS11_FUNCTION_DIGEST, 337: PKCS11_FUNC_STEP_UPDATE_KEY); 338: break; 339: case PKCS11_CMD_DIGEST_ONESHOT: 340: rc = entry_processing_step(client, ptypes, params, 341: PKCS11_FUNCTION_DIGEST, 342: PKCS11_FUNC_STEP_ONESHOT); 343: break; 344: case PKCS11_CMD_DIGEST_FINAL: 345: rc = entry_processing_step(client, ptypes, params, 346: PKCS11_FUNCTION_DIGEST, 347: PKCS11_FUNC_STEP_FINAL); 348: break; 349: case PKCS11_CMD_GENERATE_KEY_PAIR: 350: rc = entry_generate_key_pair(client, ptypes, params); 351: break; 352: case PKCS11_CMD_WRAP_KEY: 353: rc = entry_wrap_key(client, ptypes, params); 354: break; 355: case PKCS11_CMD_UNWRAP_KEY: 356: rc = entry_processing_key(client, ptypes, params, 357: PKCS11_FUNCTION_UNWRAP); 358: break; 359: default: 360: EMSG("Command %#"PRIx32" is not supported", cmd); 361: return TEE_ERROR_NOT_SUPPORTED; 362: } 363: 364: DMSG("%s rc %#"PRIx32"/%s", id2str_ta_cmd(cmd), rc, id2str_rc(rc)); 365: 366: TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc)); 367: params[0].memref.size = sizeof(rc); 368: 369: if (rc == PKCS11_CKR_BUFFER_TOO_SMALL) 370: return TEE_ERROR_SHORT_BUFFER; 371: else 372: return TEE_SUCCESS; 373: }

DOMAIN FACTS (soft defaults; do not overfit)
- Values originating from REE (e.g., TEE_Param and its fields) are tainted sources.
- Structural risks must be surfaced even if no external sink call is present yet (e.g., tainted loop bounds/index/size arithmetic, pointer/offset arithmetic, per‑byte copies like buf[i]=x, param_types vs actual access mismatch).
- TEE_Malloc/Free are NOT sinks. Random bytes from TEE_GenerateRandom are NON‑sensitive by default, unless names/comments/context indicate secrecy. Crypto APIs are excluded for “unencrypted_output” unless there is a later non‑crypto copy into REE buffers.
- When uncertain, do NOT force a conclusion; prefer "unknown" fields and/or a structural risk with a one‑line why.
- MEMREF_OUTPUT by itself is an output channel to REE; do NOT treat it as “unencrypted_output” without additional evidence of sensitivity or policy violation.

[FACT EMISSION — ALIAS & SENSITIVITY (REQUIRED)]
- Emit "=" structural_risk facts for:
(a) alias/call-site bindings (e.g., p = params[i].memref.buffer; foo(p)), recording the origin region of the pointer (REE-visible / TEE-private / unknown), and
(b) sensitivity promotions inferred from names/comments/usage (key/secret/passwd/token/credential/iv/nonce/seed/session).
- Prefer "unknown" over guessing for regions/sizes, but still emit the fact with a one‑line why.

TAGGING REQUIREMENTS (must be populated consistently)
- Whenever you emit a structural risk, add stable tags into rule_matches.others (in this fixed order):
1) flow_dir:TA->REE|REE->TA|unknown
2) src_region:REE-visible|TEE-private|unknown
3) dst_region:REE-visible|TEE-private|unknown
4) sensitivity_label:secret|key|credential|private|random|public|unknown
5) size_triplet:copy_len=?,src_sz=?,dst_sz=? (expressions allowed)

CLASSIFICATION (rules)
- For any field named rule or rule_id, use only rule identifiers that appear in the host-provided RULE CLASSIFICATION HINTS’s rule_id list (from the system prompt). If none applies, use "other". Do not invent new rule names.

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 (as schema requires).
- Ensure rule_matches.others contains the 5 tags above in the exact order for every structural risk.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". The literal placeholder "external_fn" is forbidden.

When assigning sensitivity_label:
- Use name/comment/usage cues (key, secret, passwd, token, credential, iv, nonce, seed, session).
- If promoted to sensitive, add a one-line why in the structural risk (e.g., "variable name contains 'key' and used in cipher init").

Always surface structural risks for (capture even without external sinks):
- Param type mismatch or aliasing: e.g., p = params[i].memref.buffer; foo(p) // origin remains REE-visible.
- Input-driven loop bounds or size arithmetic even if not directly used as an index.
- In-place writes into REE-visible buffers using REE-tainted indices/offsets (candidate for shared_memory_overwrite at later steps).

Examples of why:
- "tainted length from REE used to bound copy without check"
- "alias of shared buffer passed into helper without bounds"

SCHEMA (START, single JSON)
{ "phase": "start", "taint_analysis": { "function": "TA_InvokeCommandEntryPoint", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TA_InvokeCommandEntryPoint", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 開始 (TA_InvokeCommandEntryPoint)
{
  "phase": "start",
  "taint_analysis": {
    "function": "TA_InvokeCommandEntryPoint",
    "tainted_vars": [
      "tee_session",
      "client",
      "cmd",
      "ptypes",
      "params",
      "params[0].memref.buffer",
      "params[0].memref.size",
      "params[1]",
      "params[2]"
    ],
    "propagation": [
      {
        "lhs": "client",
        "rhs": "tee_session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:120"
      },
      {
        "lhs": "params[0].memref.size",
        "rhs": "TEE_PARAM_TYPE_GET(ptypes, 0) check / params[0].memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:133-137"
      },
      {
        "lhs": "params[0].memref.buffer",
        "rhs": "params (caller-provided memref buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:143-153"
      },
      {
        "lhs": "&rc (source of copy)",
        "rhs": "local enum pkcs11_rc rc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:121,366"
      },
      {
        "lhs": "params[0].memref.size (after)",
        "rhs": "sizeof(rc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:367"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:133-137",
        "evidence": "params[0].memref.size < sizeof(rc) -> return TEE_ERROR_BAD_PARAMETERS"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "rule": "other",
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}

関数: entry_ck_open_session
プロンプト 中間 (entry_ck_open_session)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_open_session” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [177]:
-- Call #1 at line 177 --
175:
176: case PKCS11_CMD_OPEN_SESSION:
177: >>> rc = entry_ck_open_session(client, ptypes, params);
178: break;
179: case PKCS11_CMD_CLOSE_SESSION:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

598: enum pkcs11_rc entry_ck_open_session(struct pkcs11_client *client,
599: uint32_t ptypes, TEE_Param *params)
600: { 601: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 602: TEE_PARAM_TYPE_NONE, 603: TEE_PARAM_TYPE_MEMREF_OUTPUT, 604: TEE_PARAM_TYPE_NONE); 605: TEE_Param *ctrl = params; 606: TEE_Param *out = params + 2; 607: enum pkcs11_rc rc = PKCS11_CKR_OK; 608: struct serialargs ctrlargs = { }; 609: uint32_t token_id = 0; 610: uint32_t flags = 0; 611: struct ck_token *token = NULL; 612: struct pkcs11_session *session = NULL; 613: bool readonly = false; 614: 615: if (!client || ptypes != exp_pt || 616: out->memref.size != sizeof(session->handle)) 617: return PKCS11_CKR_ARGUMENTS_BAD; 618: 619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 620: 621: rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id)); 622: if (rc) 623: return rc; 624: 625: rc = serialargs_get(&ctrlargs, &flags, sizeof(flags)); 626: if (rc) 627: return rc; 628: 629: if (serialargs_remaining_bytes(&ctrlargs)) 630: return PKCS11_CKR_ARGUMENTS_BAD; 631: 632: token = get_token(token_id); 633: if (!token) 634: return PKCS11_CKR_SLOT_ID_INVALID; 635: 636: 637: if (!(flags & PKCS11_CKFSS_SERIAL_SESSION)) 638: return PKCS11_CKR_SESSION_PARALLEL_NOT_SUPPORTED; 639: 640: if (flags & ~(PKCS11_CKFSS_RW_SESSION | PKCS11_CKFSS_SERIAL_SESSION)) 641: return PKCS11_CKR_ARGUMENTS_BAD; 642: 643: readonly = !(flags & PKCS11_CKFSS_RW_SESSION); 644: 645: if (!readonly && token->state == PKCS11_TOKEN_READ_ONLY) 646: return PKCS11_CKR_TOKEN_WRITE_PROTECTED; 647: 648: if (readonly) { 649: 650: TAILQ_FOREACH(session, &client->session_list, link) 651: if (pkcs11_session_is_so(session)) 652: return PKCS11_CKR_SESSION_READ_WRITE_SO_EXISTS; 653: } 654: 655: session = TEE_Malloc(sizeof(*session), TEE_MALLOC_FILL_ZERO); 656: if (!session) 657: return PKCS11_CKR_DEVICE_MEMORY; 658: 659: session->handle = handle_get(&client->session_handle_db, session); 660: if (!session->handle) { 661: TEE_Free(session); 662: return PKCS11_CKR_DEVICE_MEMORY; 663: } 664: 665: session->token = token; 666: session->client = client; 667: 668: LIST_INIT(&session->object_list); 669: 670: set_session_state(client, session, readonly); 671: 672: TAILQ_INSERT_HEAD(&client->session_list, session, link); 673: 674: session->token->session_count++; 675: if (!readonly) 676: session->token->rw_session_count++; 677: 678: TEE_MemMove(out->memref.buffer, &session->handle, 679: sizeof(session->handle)); 680: 681: DMSG("Open PKCS11 session %"PRIu32, session->handle); 682: 683: return PKCS11_CKR_OK; 684: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_open_session", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_open_session", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_open_session)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_open_session",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "ctrlargs",
      "token_id",
      "flags"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:605-606"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:605-606"
      },
      {
        "lhs": "ctrlargs (read buffer)",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:619"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(token_id))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:621"
      },
      {
        "lhs": "flags",
        "rhs": "serialargs_get(&ctrlargs, &flags, sizeof(flags))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:625"
      },
      {
        "lhs": "session->handle (source)",
        "rhs": "handle_get(&client->session_handle_db, session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:659-660"
      },
      {
        "lhs": "out->memref.buffer (written)",
        "rhs": "&session->handle via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678-679"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:601-605,615-617",
        "evidence": "ptypes compared to expected TEE_PARAM_TYPES and out->memref.size checked against sizeof(session->handle)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:621-630",
        "evidence": "serialargs_get used for token_id and flags and serialargs_remaining_bytes checked"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 598,
      "function": "entry_ck_open_session",
      "rule": "other",
      "why": "Caller-provided params array (memrefs) is aliased into callee (ctrl/out), allowing reads/writes into REE-shared buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_Param *ctrl = params; TEE_Param *out = params + 2;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 598,
      "function": "entry_ck_open_session",
      "rule": "other",
      "why": "client pointer (from caller) is passed into callee; origin traces to tee_session-derived client (caller-controlled), so binding is observed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "enum pkcs11_rc entry_ck_open_session(struct pkcs11_client *client, uint32_t ptypes, TEE_Param *params)"
    }
  ]
}

関数: handle_get
プロンプト 中間 (handle_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “handle_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_open_session at lines [659]:
-- Call #1 at line 659 --
657: return PKCS11_CKR_DEVICE_MEMORY;
658:
659: >>> session->handle = handle_get(&client->session_handle_db, session);
660:     	if (!session->handle) {
661:     		TEE_Free(session);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

37: uint32_t handle_get(struct handle_db *db, void *ptr)
38: {
39: uint32_t n = 0;
40: void *p = NULL;
41: uint32_t new_max_ptrs = 0;
42:
43: if (!db || !ptr || ptr == INVALID_HANDLE_PTR)
44: return 0;
45:
46:
47: for (n = 1; n < db->max_ptrs; n++) {
48: if (!db->ptrs[n]) {
49: db->ptrs[n] = ptr;
50: return n;
51: }
52: }
53:
54:
55: if (db->max_ptrs)
56: new_max_ptrs = db->max_ptrs * 2;
57: else
58: new_max_ptrs = HANDLE_DB_INITIAL_MAX_PTRS;
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;
70: return n;
71: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"handle_get",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (handle_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": [
      "db",
      "ptr",
      "db->ptrs",
      "db->max_ptrs",
      "n",
      "p",
      "new_max_ptrs"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "loop counter starting at 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:47-52"
      },
      {
        "lhs": "db->ptrs[n]",
        "rhs": "ptr (assigned when slot free)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:48-51"
      },
      {
        "lhs": "new_max_ptrs",
        "rhs": "db->max_ptrs * 2 or HANDLE_DB_INITIAL_MAX_PTRS",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:55-58"
      },
      {
        "lhs": "p",
        "rhs": "TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-63"
      },
      {
        "lhs": "db->ptrs (extended region)",
        "rhs": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64-66"
      },
      {
        "lhs": "db->ptrs[n]",
        "rhs": "ptr (after realloc path)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:43-44",
        "evidence": "Early return if !db || !ptr || ptr == INVALID_HANDLE_PTR"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-62",
        "evidence": "TEE_Realloc return checked and function returns 0 on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 37,
      "function": "handle_get",
      "rule": "other",
      "why": "Call-site binding: db parameter aliases a handle_db originating from caller context; origin uncertain so region marked unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "uint32_t handle_get(struct handle_db *db, void *ptr)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 37,
      "function": "handle_get",
      "rule": "other",
      "why": "Call-site binding: ptr parameter aliases session pointer allocated in caller (TEE_Malloc), so origin is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "uint32_t handle_get(struct handle_db *db, void *ptr)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 47,
      "function": "handle_get",
      "rule": "other",
      "why": "Writes ptr into db->ptrs[n] (array write); if db->ptrs region is attacker-controlled origin this could overwrite shared memory.",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=db->max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from handle_get at lines [64]:
-- Call #1 at line 64 --
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

// Call at line 64:
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemFill", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemFill", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "dest",
      "value",
      "len",
      "db->ptrs",
      "db->max_ptrs",
      "new_max_ptrs"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "db->ptrs + db->max_ptrs (pointer arithmetic)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      },
      {
        "lhs": "len",
        "rhs": "(new_max_ptrs - db->max_ptrs) * sizeof(void *)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64-65"
      },
      {
        "lhs": "db->ptrs (after realloc)",
        "rhs": "p (result of TEE_Realloc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-63"
      }
    ],
    "sanitizers": [
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-62",
        "evidence": "Checks TEE_Realloc return (p) and returns on failure before calling TEE_MemFill"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "Zeroing memory at db->ptrs + db->max_ptrs which is derived from realloc'd db->ptrs; destination is TA heap (private) but origin of db may be uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=(new_max_ptrs - db->max_ptrs) * sizeof(void *),src_sz=unknown,dst_sz=new_max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "handle_get",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "TEE_MemFill writes a constant zero to realloc'd TA heap region (db->ptrs + db->max_ptrs); the fill value is not REE-tainted and allocation success is checked prior to the call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "not_applicable",
      "propagation_path": [],
      "sink": "TEE_MemFill called with a constant value to zero newly allocated region"
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "Not applicable: no attacker-controlled data is written by this call.",
      "impact": "None from this line itself; zeroing memory is benign."
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [
        "fill value is constant zero",
        "TEE_Realloc return (p) is checked before call"
      ],
      "negative_indicators": [
        "origin of db structure is not fully verified here (caller-provided)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Call fills memory with constant zero into TA-private heap after checking realloc success; no REE-tainted data flows into this sink at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The sink writes a constant to TA-private memory after allocation checks; no tainted or sensitive data is written to REE from this call.",
  "effective_sanitizers": [
    {
      "type": "allocation_check",
      "location": "handle_get:60-62",
      "evidence": "TEE_Realloc return checked and function returns on failure before TEE_MemFill"
    }
  ],
  "argument_safety": [
    {
      "arg": "db->ptrs + db->max_ptrs",
      "why_safe": "destination points into freshly realloc'd TA heap and is zeroed",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-66"
    },
    {
      "arg": "value (0)",
      "why_safe": "constant zero is not tainted",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
    }
  ],
  "residual_risks": [
    "line 64: db origin is caller-provided (unknown); if db->ptrs pointed to REE-mapped memory earlier, writes could affect shared memory — caller-side provenance not fully verified here"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "constant zero value",
      "realloc success check before fill"
    ],
    "negative_indicators": [
      "db provenance unknown in this function (caller-supplied handle_db)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No tainted/secret data reaches TEE_MemFill at line 64; the operation zeroes TA-private memory after allocation checks. The main residual risk is caller provenance of db, which is a structural concern but does not make this line vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 37,
      "function": "handle_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "why": "Call-site binding: db parameter aliases a handle_db originating from caller context; origin uncertain so region marked unknown.",
      "code_excerpt": "uint32_t handle_get(struct handle_db *db, void *ptr)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 37,
      "function": "handle_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "why": "Call-site binding: ptr parameter aliases session pointer allocated in caller (TEE_Malloc), so origin is TEE-private.",
      "code_excerpt": "uint32_t handle_get(struct handle_db *db, void *ptr)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 47,
      "function": "handle_get",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=db->max_ptrs * sizeof(void *)"
        ]
      },
      "why": "Writes ptr into db->ptrs[n] (array write); if db->ptrs region is attacker-controlled origin this could overwrite shared memory.",
      "code_excerpt": "if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=(new_max_ptrs - db->max_ptrs) * sizeof(void *),src_sz=unknown,dst_sz=new_max_ptrs * sizeof(void *)"
        ]
      },
      "why": "Zeroing memory at db->ptrs + db->max_ptrs which is derived from realloc'd db->ptrs; destination is TA heap (private) but origin of db may be uncertain.",
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    }
  ]
}
フロー #2: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> handle_get -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objecthandle_getTEE_MemFill

実行時間: 140.24秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64

パラメータインデックス: 0

解析結果

安全判定理由: TEE_MemFill here writes a constant zero into a TA-private reallocated buffer (no REE-tainted source, no sensitive data exposure, and prior null/realloc checks reduce memory-failure risk).

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_generate_secret
プロンプト 中間 (entry_generate_secret)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_generate_secret” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [289]:
-- Call #1 at line 289 --
287: break;
288: case PKCS11_CMD_GENERATE_KEY:
289: >>> rc = entry_generate_secret(client, ptypes, params);
290: break;
291: case PKCS11_CMD_FIND_OBJECTS_INIT:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

204: enum pkcs11_rc entry_generate_secret(struct pkcs11_client *client,
205: uint32_t ptypes, TEE_Param *params)
206: { 207: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 208: TEE_PARAM_TYPE_NONE, 209: TEE_PARAM_TYPE_MEMREF_OUTPUT, 210: TEE_PARAM_TYPE_NONE); 211: TEE_Param *ctrl = params; 212: TEE_Param *out = params + 2; 213: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 214: struct serialargs ctrlargs = { }; 215: struct pkcs11_session *session = NULL; 216: struct pkcs11_attribute_head *proc_params = NULL; 217: struct obj_attrs *head = NULL; 218: struct pkcs11_object_head *template = NULL; 219: size_t template_size = 0; 220: uint32_t obj_handle = 0; 221: 222: if (!client || ptypes != exp_pt || 223: out->memref.size != sizeof(obj_handle)) 224: return PKCS11_CKR_ARGUMENTS_BAD; 225: 226: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 227: 228: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 229: if (rc) 230: return rc; 231: 232: rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params); 233: if (rc) 234: goto out; 235: 236: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 237: if (rc) 238: goto out; 239: 240: if (serialargs_remaining_bytes(&ctrlargs)) { 241: rc = PKCS11_CKR_ARGUMENTS_BAD; 242: goto out; 243: } 244: 245: rc = get_ready_session(session); 246: if (rc) 247: goto out; 248: 249: template_size = sizeof(*template) + template->attrs_size; 250: 251: rc = check_mechanism_against_processing(session, proc_params->id, 252: PKCS11_FUNCTION_GENERATE, 253: PKCS11_FUNC_STEP_INIT); 254: if (rc) { 255: DMSG("Invalid mechanism %#"PRIx32": %#x", proc_params->id, rc); 256: goto out; 257: } 258: 259: 263: rc = create_attributes_from_template(&head, template, template_size, 264: NULL, PKCS11_FUNCTION_GENERATE, 265: proc_params->id, 266: PKCS11_CKO_UNDEFINED_ID); 267: if (rc) 268: goto out; 269: 270: TEE_Free(template); 271: template = NULL; 272: 273: rc = check_created_attrs(head, NULL); 274: if (rc) 275: goto out; 276: 277: rc = check_created_attrs_against_processing(proc_params->id, head); 278: if (rc) 279: goto out; 280: 281: rc = check_created_attrs_against_token(session, head); 282: if (rc) 283: goto out; 284: 285: 290: switch (proc_params->id) { 291: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN: 292: case PKCS11_CKM_AES_KEY_GEN: 293: 294: rc = generate_random_key_value(&head); 295: if (rc) 296: goto out; 297: break; 298: 299: default: 300: rc = PKCS11_CKR_MECHANISM_INVALID; 301: goto out; 302: } 303: 304: TEE_Free(proc_params); 305: proc_params = NULL; 306: 307: 310: rc = create_object(session, head, &obj_handle); 311: if (rc) 312: goto out; 313: 314: 320: head = NULL; 321: 322: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle)); 323: out->memref.size = sizeof(obj_handle); 324: 325: DMSG("PKCS11 session %"PRIu32": generate secret %#"PRIx32, 326: session->handle, obj_handle); 327: 328: out: 329: TEE_Free(proc_params); 330: TEE_Free(template); 331: TEE_Free(head); 332: 333: return rc; 334: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_generate_secret", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_generate_secret", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_generate_secret)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_generate_secret",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "proc_params",
      "template",
      "head",
      "obj_handle"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:211-213"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:211-213"
      },
      {
        "lhs": "ptypes",
        "rhs": "caller ptypes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:222-224"
      },
      {
        "lhs": "serialargs (ctrlargs) <- ctrl->memref.buffer,ctrl->memref.size",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:226"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:228-230"
      },
      {
        "lhs": "proc_params",
        "rhs": "serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:232-234"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs, &template)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:236-238"
      },
      {
        "lhs": "template_size",
        "rhs": "sizeof(*template) + template->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:249"
      },
      {
        "lhs": "head",
        "rhs": "create_attributes_from_template(&head, template, template_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:263-267"
      },
      {
        "lhs": "head (modified)",
        "rhs": "generate_random_key_value(&head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:294-296"
      },
      {
        "lhs": "obj_handle",
        "rhs": "create_object(session, head, &obj_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:310-312"
      },
      {
        "lhs": "out->memref.buffer (written)",
        "rhs": "&obj_handle via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322-323"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:207-210,222-224",
        "evidence": "checks ptypes == expected types and out->memref.size == sizeof(obj_handle)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:240-243",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked and errors on remaining bytes"
      },
      {
        "kind": "mechanism_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:251-257",
        "evidence": "check_mechanism_against_processing validates mechanism"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 289,
      "function": "entry_generate_secret",
      "rule": "other",
      "why": "caller-provided client pointer (from tee_session) is passed through as callee 'client' parameter; origin not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_generate_secret(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 289,
      "function": "entry_generate_secret",
      "rule": "other",
      "why": "alias of shared params array (caller-provided TEE_Param memrefs) passed into helper; memref buffers are REE-visible",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "rc = entry_generate_secret(client, ptypes, params);"
    }
  ]
}

関数: create_object
プロンプト 中間 (create_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “create_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [310, 534, 546, 1034]:
-- Call #1 at line 310 --
308: * Object is ready, register it and return a handle.
309: */
310: >>> rc = create_object(session, head, &obj_handle);
311: if (rc)
312: goto out;
-- Call #2 at line 534 --
532: * Object is ready, register it and return a handle.
533: */
534: >>> rc = create_object(session, pub_head, &pubkey_handle);
535: if (rc)
536: goto out;
-- Call #3 at line 546 --
544: pub_head = NULL;
545:
546: >>> rc = create_object(session, priv_head, &privkey_handle);
547: if (rc)
548: goto out;
-- Call #4 at line 1034 --
1032: * Object is ready, register it and return a handle.
1033: */
1034: >>> rc = create_object(session, head, &obj_handle);
1035: if (rc)
1036: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

208: enum pkcs11_rc create_object(void *sess, struct obj_attrs *head,
209: uint32_t *out_handle)
210: { 211: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 212: struct pkcs11_object *obj = NULL; 213: struct pkcs11_session *session = (struct pkcs11_session *)sess; 214: uint32_t obj_handle = 0; 215: 216: #ifdef DEBUG 217: trace_attributes("[create]", head); 218: #endif 219: 220: 224: 225: obj = create_obj_instance(head, NULL); 226: if (!obj) 227: return PKCS11_CKR_DEVICE_MEMORY; 228: 229: LIST_INSERT_HEAD(&temporary_object_list, obj, link); 230: 231: 232: obj_handle = handle_get(get_object_handle_db(session), obj); 233: if (!obj_handle) { 234: rc = PKCS11_CKR_DEVICE_MEMORY; 235: goto err; 236: } 237: 238: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 239: TEE_Result res = TEE_SUCCESS; 240: 241: 247: size_t size = sizeof(struct obj_attrs) + 248: obj->attributes->attrs_size; 249: uint32_t tee_obj_flags = TEE_DATA_FLAG_ACCESS_READ | 250: TEE_DATA_FLAG_ACCESS_WRITE | 251: TEE_DATA_FLAG_ACCESS_WRITE_META; 252: 253: rc = create_object_uuid(get_session_token(session), obj); 254: if (rc) 255: goto err; 256: 257: res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, 258: obj->uuid, sizeof(TEE_UUID), 259: tee_obj_flags, 260: TEE_HANDLE_NULL, 261: obj->attributes, size, 262: &obj->attribs_hdl); 263: if (res) { 264: rc = tee2pkcs_error(res); 265: goto err; 266: } 267: 268: rc = register_persistent_object(get_session_token(session), 269: obj->uuid); 270: if (rc) 271: goto err; 272: 273: TEE_CloseObject(obj->attribs_hdl); 274: obj->attribs_hdl = TEE_HANDLE_NULL; 275: 276: 277: LIST_REMOVE(obj, link); 278: LIST_INSERT_HEAD(&session->token->object_list, obj, link); 279: } else { 280: 281: LIST_REMOVE(obj, link); 282: LIST_INSERT_HEAD(get_session_objects(session), obj, link); 283: } 284: 285: *out_handle = obj_handle; 286: 287: return PKCS11_CKR_OK; 288: err: 289: 290: obj->attributes = NULL; 291: handle_put(get_object_handle_db(session), obj_handle); 292: if (get_bool(head, PKCS11_CKA_TOKEN)) 293: cleanup_persistent_object(obj, session->token); 294: else 295: cleanup_volatile_obj_ref(obj); 296: 297: return rc; 298: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "create_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"create_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (create_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "create_object",
    "tainted_vars": [
      "sess",
      "session",
      "head",
      "out_handle",
      "obj",
      "obj_handle",
      "obj->attributes",
      "obj->uuid",
      "obj->attribs_hdl"
    ],
    "propagation": [
      {
        "lhs": "session",
        "rhs": "(struct pkcs11_session *)sess",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:213"
      },
      {
        "lhs": "obj",
        "rhs": "create_obj_instance(head, NULL)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:225-227"
      },
      {
        "lhs": "LIST_INSERT_HEAD(&temporary_object_list, obj, link)",
        "rhs": "obj inserted into temporary list before handle assignment",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:229-231"
      },
      {
        "lhs": "obj_handle",
        "rhs": "handle_get(get_object_handle_db(session), obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:232-236"
      },
      {
        "lhs": "obj->attribs_hdl / persistent storage",
        "rhs": "TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257-263"
      },
      {
        "lhs": "*out_handle",
        "rhs": "obj_handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:285-286"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "rule": "other",
      "why": "caller 'session' pointer from entry_generate_secret is forwarded as sess parameter; origin is TA session object (TA-private) but provenance across calls is structural risk",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "rule": "other",
      "why": "caller 'head' (obj_attrs) alias passed into callee; head may contain attributes derived from REE deserialization earlier",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+attrs_size,src_sz=template-derived,dst_sz=sizeof(struct obj_attrs)+attrs_size"
        ]
      },
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "rule": "other",
      "why": "caller passes &obj_handle (stack address) to receive handle from callee; binding of out_handle to caller stack",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "create_object",
      "rule": "other",
      "why": "Persistent object created from obj->attributes which may include untrusted/REE-derived attribute bytes (template); writing to storage using TEE_CreatePersistentObject",
      "sink_function": "TEE_CreatePersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=storage"
        ]
      },
      "code_excerpt": "TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, obj->uuid, sizeof(TEE_UUID), tee_obj_flags, TEE_HANDLE_NULL, obj->attributes, size, &obj->attribs_hdl);"
    }
  ]
}

関数: handle_get
プロンプト 中間 (handle_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “handle_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [232, 628]:
-- Call #1 at line 232 --
230:
231:
232: >>> obj_handle = handle_get(get_object_handle_db(session), obj);
233:     	if (!obj_handle) {
234:     		rc = PKCS11_CKR_DEVICE_MEMORY;
-- Call #2 at line 628 --
626:     		handle = pkcs11_object2handle(obj, session);
627:     		if (!handle) {
628: >>> 			handle = handle_get(object_db, obj);
629:     			if (!handle) {
630:     				rc = PKCS11_CKR_DEVICE_MEMORY;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

37: uint32_t handle_get(struct handle_db *db, void *ptr)
38: {
39: uint32_t n = 0;
40: void *p = NULL;
41: uint32_t new_max_ptrs = 0;
42:
43: if (!db || !ptr || ptr == INVALID_HANDLE_PTR)
44: return 0;
45:
46:
47: for (n = 1; n < db->max_ptrs; n++) {
48: if (!db->ptrs[n]) {
49: db->ptrs[n] = ptr;
50: return n;
51: }
52: }
53:
54:
55: if (db->max_ptrs)
56: new_max_ptrs = db->max_ptrs * 2;
57: else
58: new_max_ptrs = HANDLE_DB_INITIAL_MAX_PTRS;
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;
70: return n;
71: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"handle_get",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (handle_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": [
      "db",
      "ptr",
      "n",
      "p",
      "new_max_ptrs",
      "db->ptrs",
      "db->max_ptrs"
    ],
    "propagation": [
      {
        "lhs": "if (!db || !ptr || ptr == INVALID_HANDLE_PTR) return 0",
        "rhs": "db, ptr validated for null/invalid",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:43-44"
      },
      {
        "lhs": "db->ptrs[n] = ptr",
        "rhs": "assignment of caller pointer into handle DB",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:47-51"
      },
      {
        "lhs": "p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *))",
        "rhs": "db->ptrs reallocated to larger array",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-66"
      },
      {
        "lhs": "db->ptrs[n] = ptr (after realloc)",
        "rhs": "store pointer into newly expanded array",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:43-44",
        "evidence": "null/invalid-pointer check for db and ptr at function entry"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 232,
      "function": "handle_get",
      "rule": "other",
      "why": "binds callee 'db' parameter to get_object_handle_db(session) origin; origin is session-derived (TA-private) but provenance is structural risk across calls",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "obj_handle = handle_get(get_object_handle_db(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 232,
      "function": "handle_get",
      "rule": "other",
      "why": "binds callee 'ptr' parameter to obj pointer created in caller; ptr is TA-private object pointer passed into handle DB",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "obj_handle = handle_get(get_object_handle_db(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 49,
      "function": "handle_get",
      "rule": "other",
      "why": "assignment db->ptrs[n] = ptr writes caller pointer into DB array (possible aliasing of caller memory into handle table)",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=db->max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from handle_get at lines [64]:
-- Call #1 at line 64 --
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

// Call at line 64:
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemFill", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemFill", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "db->ptrs + db->max_ptrs",
      "0",
      "(new_max_ptrs - db->max_ptrs) * sizeof(void *)"
    ],
    "propagation": [
      {
        "lhs": "dest = db->ptrs + db->max_ptrs",
        "rhs": "db->ptrs (reallocated) + db->max_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:63-65"
      },
      {
        "lhs": "fill_value = 0",
        "rhs": "literal 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      },
      {
        "lhs": "fill_size",
        "rhs": "(new_max_ptrs - db->max_ptrs) * sizeof(void *)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "destination pointer is db->ptrs + db->max_ptrs (caller-managed buffer) being passed to MemFill; origin is reallocated DB array in TA memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=(new_max_ptrs - db->max_ptrs) * sizeof(void *),src_sz=1,dst_sz=new_max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "fill byte value (0) passed as argument; constant but included for binding completeness",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=1,src_sz=1,dst_sz=(new_max_ptrs - db->max_ptrs) * sizeof(void *)"
        ]
      },
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "size expression derived from db->max_ptrs and new_max_ptrs (caller-controlled); arithmetic influences amount of memory written",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=(new_max_ptrs - db->max_ptrs) * sizeof(void *),src_sz=unknown,dst_sz=new_max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "handle_get",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "Destination is a TA-managed reallocated array region and fill value is constant zero; no REE-tainted data flows into this call and size is derived from internal db->max_ptrs arithmetic which is checked earlier (realloc success).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "TEE_MemFill here writes a constant zero into a TA-private reallocated buffer (no REE-tainted source, no sensitive data exposure, and prior null/realloc checks reduce memory-failure risk).",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "handle_get:43-44",
      "evidence": "null/invalid-pointer check for db and ptr at function entry"
    },
    {
      "type": "mem_access_check",
      "location": "handle_get:60-66",
      "evidence": "TEE_Realloc return checked for NULL before use"
    }
  ],
  "argument_safety": [
    {
      "arg": "db->ptrs + db->max_ptrs",
      "why_safe": "pointer computed from reallocated internal array after successful TEE_Realloc",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-66"
    },
    {
      "arg": "fill value (0)",
      "why_safe": "constant literal, not attacker-controlled",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
    }
  ],
  "residual_risks": [
    "None significant for this sink line; size arithmetic depends on db->max_ptrs/new_max_ptrs correctness across callers"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Destination and size derived from internal TA-managed fields (db->ptrs, db->max_ptrs)",
      "TEE_Realloc result is checked before use",
      "Fill value is constant zero (not sensitive)"
    ],
    "negative_indicators": [
      "Size expression uses arithmetic on db->max_ptrs/new_max_ptrs which could be influenced by prior logic if corrupted (no explicit bounds guard beyond realloc success)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No REE-tainted data reaches this TEE_MemFill call and the write is into TA-private memory with realloc null-check; therefore not an information-disclosure or clear memory-safety vulnerability at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 49,
      "function": "handle_get",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=db->max_ptrs * sizeof(void *)"
        ]
      },
      "why": "Assignment db->ptrs[n] = ptr inserts caller pointer into handle table (aliasing) which is a structural risk of in-memory aliasing/ownership but does not reach REE here.",
      "code_excerpt": "if (!db->ptrs[n]) { db->ptrs[n] = ptr; return n; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+attrs_size,src_sz=template-derived,dst_sz=sizeof(struct obj_attrs)+attrs_size"
        ]
      },
      "why": "Attributes template derived from serialized REE input is passed as 'head' into create_object; structural risk of untrusted attributes influencing stored object.",
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    }
  ]
}
フロー #3: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> handle_get -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objecthandle_getTEE_MemFill

実行時間: 142.92秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64

パラメータインデックス: 0

解析結果

詳細: TEE_MemFill at line 64 initializes TA-private memory with a constant; no REE-tainted data flows into this call and existing null checks reduce immediate risk, so it is not a vulnerability for information disclosure or overflow as written.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: entry_generate_key_pair
プロンプト 中間 (entry_generate_key_pair)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_generate_key_pair” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [350]:
-- Call #1 at line 350 --
348: break;
349: case PKCS11_CMD_GENERATE_KEY_PAIR:
350: >>> rc = entry_generate_key_pair(client, ptypes, params);
351: break;
352: case PKCS11_CMD_WRAP_KEY:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

387: enum pkcs11_rc entry_generate_key_pair(struct pkcs11_client *client,
388: uint32_t ptypes, TEE_Param *params)
389: { 390: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 391: TEE_PARAM_TYPE_NONE, 392: TEE_PARAM_TYPE_MEMREF_OUTPUT, 393: TEE_PARAM_TYPE_NONE); 394: TEE_Param *ctrl = params; 395: TEE_Param *out = params + 2; 396: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 397: struct serialargs ctrlargs = { }; 398: struct pkcs11_session *session = NULL; 399: struct pkcs11_attribute_head *proc_params = NULL; 400: struct obj_attrs *pub_head = NULL; 401: struct obj_attrs *priv_head = NULL; 402: struct pkcs11_object_head *pub_template = NULL; 403: struct pkcs11_object_head *priv_template = NULL; 404: struct pkcs11_object *object = NULL; 405: size_t pub_template_size = 0; 406: size_t priv_template_size = 0; 407: uint32_t pubkey_handle = 0; 408: uint32_t privkey_handle = 0; 409: uint32_t *hdl_ptr = NULL; 410: size_t out_ref_size = sizeof(pubkey_handle) + sizeof(privkey_handle); 411: 412: if (!client || ptypes != exp_pt || out->memref.size != out_ref_size) 413: return PKCS11_CKR_ARGUMENTS_BAD; 414: 415: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 416: 417: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 418: if (rc) 419: return rc; 420: 421: rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params); 422: if (rc) 423: goto out; 424: 425: rc = serialargs_alloc_get_attributes(&ctrlargs, &pub_template); 426: if (rc) 427: goto out; 428: 429: rc = serialargs_alloc_get_attributes(&ctrlargs, &priv_template); 430: if (rc) 431: goto out; 432: 433: if (serialargs_remaining_bytes(&ctrlargs)) { 434: rc = PKCS11_CKR_ARGUMENTS_BAD; 435: goto out; 436: } 437: 438: rc = get_ready_session(session); 439: if (rc) 440: goto out; 441: 442: rc = check_mechanism_against_processing(session, proc_params->id, 443: PKCS11_FUNCTION_GENERATE_PAIR, 444: PKCS11_FUNC_STEP_INIT); 445: if (rc) 446: goto out; 447: 448: pub_template_size = sizeof(*pub_template) + pub_template->attrs_size; 449: 450: rc = create_attributes_from_template(&pub_head, pub_template, 451: pub_template_size, NULL, 452: PKCS11_FUNCTION_GENERATE_PAIR, 453: proc_params->id, 454: PKCS11_CKO_PUBLIC_KEY); 455: if (rc) 456: goto out; 457: 458: TEE_Free(pub_template); 459: pub_template = NULL; 460: 461: priv_template_size = sizeof(*priv_template) + 462: priv_template->attrs_size; 463: 464: rc = create_attributes_from_template(&priv_head, priv_template, 465: priv_template_size, NULL, 466: PKCS11_FUNCTION_GENERATE_PAIR, 467: proc_params->id, 468: PKCS11_CKO_PRIVATE_KEY); 469: if (rc) 470: goto out; 471: 472: TEE_Free(priv_template); 473: priv_template = NULL; 474: 475: 476: rc = add_missing_attribute_id(&pub_head, &priv_head); 477: if (rc) 478: goto out; 479: 480: 481: rc = check_created_attrs(pub_head, priv_head); 482: if (rc) 483: goto out; 484: 485: rc = check_created_attrs_against_processing(proc_params->id, pub_head); 486: if (rc) 487: goto out; 488: 489: rc = check_created_attrs_against_processing(proc_params->id, 490: priv_head); 491: if (rc) 492: goto out; 493: 494: rc = check_created_attrs_against_token(session, pub_head); 495: if (rc) 496: goto out; 497: 498: rc = check_access_attrs_against_token(session, pub_head); 499: if (rc) 500: goto out; 501: 502: rc = check_created_attrs_against_token(session, priv_head); 503: if (rc) 504: goto out; 505: 506: rc = check_access_attrs_against_token(session, priv_head); 507: if (rc) 508: goto out; 509: 510: 511: switch (proc_params->id) { 512: case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN: 513: rc = generate_eddsa_keys(proc_params, &pub_head, &priv_head); 514: break; 515: case PKCS11_CKM_EC_KEY_PAIR_GEN: 516: rc = generate_ec_keys(proc_params, &pub_head, &priv_head); 517: break; 518: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN: 519: rc = generate_rsa_keys(proc_params, &pub_head, &priv_head); 520: break; 521: default: 522: rc = PKCS11_CKR_MECHANISM_INVALID; 523: break; 524: } 525: if (rc) 526: goto out; 527: 528: TEE_Free(proc_params); 529: proc_params = NULL; 530: 531: 534: rc = create_object(session, pub_head, &pubkey_handle); 535: if (rc) 536: goto out; 537: 538: 544: pub_head = NULL; 545: 546: rc = create_object(session, priv_head, &privkey_handle); 547: if (rc) 548: goto out; 549: 550: 551: priv_head = NULL; 552: 553: hdl_ptr = (uint32_t *)out->memref.buffer; 554: 555: TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle)); 556: TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle)); 557: 558: DMSG("PKCS11 session %"PRIu32": create key pair %#"PRIx32"/%#"PRIx32, 559: session->handle, privkey_handle, pubkey_handle); 560: 561: pubkey_handle = 0; 562: privkey_handle = 0; 563: out: 564: if (pubkey_handle) { 565: object = pkcs11_handle2object(pubkey_handle, session); 566: if (!object) 567: TEE_Panic(0); 568: destroy_object(session, object, false); 569: } 570: TEE_Free(priv_head); 571: TEE_Free(pub_head); 572: TEE_Free(priv_template); 573: TEE_Free(pub_template); 574: TEE_Free(proc_params); 575: 576: return rc; 577: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_generate_key_pair", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_generate_key_pair", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_generate_key_pair)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_generate_key_pair",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "pub_template",
      "priv_template",
      "proc_params"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:394-396"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:395"
      },
      {
        "lhs": "out_ref_size",
        "rhs": "sizeof(pubkey_handle) + sizeof(privkey_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:410"
      },
      {
        "lhs": "pub_template_size",
        "rhs": "sizeof(*pub_template) + pub_template->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:448-449"
      },
      {
        "lhs": "priv_template_size",
        "rhs": "sizeof(*priv_template) + priv_template->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:461-462"
      },
      {
        "lhs": "hdl_ptr",
        "rhs": "(uint32_t *)out->memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:553-556"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:390-394,412-413",
        "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to out_ref_size"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:433-436",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked and errors on leftover bytes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 350,
      "function": "entry_generate_key_pair",
      "rule": "other",
      "why": "alias of caller-provided client pointer passed into callee; provenance REE->client binding from TA entry hop",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_client*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_generate_key_pair(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 350,
      "function": "entry_generate_key_pair",
      "rule": "other",
      "why": "alias of caller-provided params pointer (shared memrefs) passed into callee; params contain REE-visible memrefs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_generate_key_pair(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "rule": "other",
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}

関数: create_object
プロンプト 中間 (create_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “create_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [534, 546, 1034]:
-- Call #1 at line 534 --
532: * Object is ready, register it and return a handle.
533: */
534: >>> rc = create_object(session, pub_head, &pubkey_handle);
535: if (rc)
536: goto out;
-- Call #2 at line 546 --
544: pub_head = NULL;
545:
546: >>> rc = create_object(session, priv_head, &privkey_handle);
547: if (rc)
548: goto out;
-- Call #3 at line 1034 --
1032: * Object is ready, register it and return a handle.
1033: */
1034: >>> rc = create_object(session, head, &obj_handle);
1035: if (rc)
1036: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

208: enum pkcs11_rc create_object(void *sess, struct obj_attrs *head,
209: uint32_t *out_handle)
210: { 211: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 212: struct pkcs11_object *obj = NULL; 213: struct pkcs11_session *session = (struct pkcs11_session *)sess; 214: uint32_t obj_handle = 0; 215: 216: #ifdef DEBUG 217: trace_attributes("[create]", head); 218: #endif 219: 220: 224: 225: obj = create_obj_instance(head, NULL); 226: if (!obj) 227: return PKCS11_CKR_DEVICE_MEMORY; 228: 229: LIST_INSERT_HEAD(&temporary_object_list, obj, link); 230: 231: 232: obj_handle = handle_get(get_object_handle_db(session), obj); 233: if (!obj_handle) { 234: rc = PKCS11_CKR_DEVICE_MEMORY; 235: goto err; 236: } 237: 238: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 239: TEE_Result res = TEE_SUCCESS; 240: 241: 247: size_t size = sizeof(struct obj_attrs) + 248: obj->attributes->attrs_size; 249: uint32_t tee_obj_flags = TEE_DATA_FLAG_ACCESS_READ | 250: TEE_DATA_FLAG_ACCESS_WRITE | 251: TEE_DATA_FLAG_ACCESS_WRITE_META; 252: 253: rc = create_object_uuid(get_session_token(session), obj); 254: if (rc) 255: goto err; 256: 257: res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, 258: obj->uuid, sizeof(TEE_UUID), 259: tee_obj_flags, 260: TEE_HANDLE_NULL, 261: obj->attributes, size, 262: &obj->attribs_hdl); 263: if (res) { 264: rc = tee2pkcs_error(res); 265: goto err; 266: } 267: 268: rc = register_persistent_object(get_session_token(session), 269: obj->uuid); 270: if (rc) 271: goto err; 272: 273: TEE_CloseObject(obj->attribs_hdl); 274: obj->attribs_hdl = TEE_HANDLE_NULL; 275: 276: 277: LIST_REMOVE(obj, link); 278: LIST_INSERT_HEAD(&session->token->object_list, obj, link); 279: } else { 280: 281: LIST_REMOVE(obj, link); 282: LIST_INSERT_HEAD(get_session_objects(session), obj, link); 283: } 284: 285: *out_handle = obj_handle; 286: 287: return PKCS11_CKR_OK; 288: err: 289: 290: obj->attributes = NULL; 291: handle_put(get_object_handle_db(session), obj_handle); 292: if (get_bool(head, PKCS11_CKA_TOKEN)) 293: cleanup_persistent_object(obj, session->token); 294: else 295: cleanup_volatile_obj_ref(obj); 296: 297: return rc; 298: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "create_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"create_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (create_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "create_object",
    "tainted_vars": [
      "sess",
      "session",
      "head",
      "out_handle",
      "obj",
      "obj->attributes",
      "obj->attribs_hdl",
      "obj_handle"
    ],
    "propagation": [
      {
        "lhs": "session",
        "rhs": "(struct pkcs11_session *)sess",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:213-214"
      },
      {
        "lhs": "obj",
        "rhs": "create_obj_instance(head, NULL)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:225-227"
      },
      {
        "lhs": "obj_handle",
        "rhs": "handle_get(get_object_handle_db(session), obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:232-236"
      },
      {
        "lhs": "obj->attribs_hdl",
        "rhs": "TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257-263"
      },
      {
        "lhs": "*out_handle",
        "rhs": "obj_handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:285-286"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:238-246",
        "evidence": "get_bool(head, PKCS11_CKA_TOKEN) used to branch persistent vs volatile handling"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 534,
      "function": "create_object",
      "rule": "other",
      "why": "Binding of callee parameter 'sess' to caller 'session' at call site; origin is from caller-managed session object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object(session, pub_head, &pubkey_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 534,
      "function": "create_object",
      "rule": "other",
      "why": "Binding of callee parameter 'head' to caller 'pub_head' (constructed from templates that originate from REE-parsed data)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+head->attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object(session, pub_head, &pubkey_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 534,
      "function": "create_object",
      "rule": "other",
      "why": "Binding of callee out parameter 'out_handle' to caller '&pubkey_handle' (caller-local handle pointer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = create_object(session, pub_head, &pubkey_handle);"
    }
  ]
}

関数: handle_get
プロンプト 中間 (handle_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “handle_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [232, 628]:
-- Call #1 at line 232 --
230:
231:
232: >>> obj_handle = handle_get(get_object_handle_db(session), obj);
233:     	if (!obj_handle) {
234:     		rc = PKCS11_CKR_DEVICE_MEMORY;
-- Call #2 at line 628 --
626:     		handle = pkcs11_object2handle(obj, session);
627:     		if (!handle) {
628: >>> 			handle = handle_get(object_db, obj);
629:     			if (!handle) {
630:     				rc = PKCS11_CKR_DEVICE_MEMORY;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

37: uint32_t handle_get(struct handle_db *db, void *ptr)
38: {
39: uint32_t n = 0;
40: void *p = NULL;
41: uint32_t new_max_ptrs = 0;
42:
43: if (!db || !ptr || ptr == INVALID_HANDLE_PTR)
44: return 0;
45:
46:
47: for (n = 1; n < db->max_ptrs; n++) {
48: if (!db->ptrs[n]) {
49: db->ptrs[n] = ptr;
50: return n;
51: }
52: }
53:
54:
55: if (db->max_ptrs)
56: new_max_ptrs = db->max_ptrs * 2;
57: else
58: new_max_ptrs = HANDLE_DB_INITIAL_MAX_PTRS;
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;
70: return n;
71: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"handle_get",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (handle_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "handle_get",
    "tainted_vars": [
      "db",
      "ptr",
      "n",
      "p",
      "db->ptrs",
      "db->max_ptrs"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "loop index starting at 1; used to index db->ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:47-52"
      },
      {
        "lhs": "db->ptrs",
        "rhs": "TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-66"
      },
      {
        "lhs": "db->ptrs[n]",
        "rhs": "ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:49,69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:43-44",
        "evidence": "null/invalid pointer checks: if (!db || !ptr || ptr == INVALID_HANDLE_PTR) return 0;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 232,
      "function": "handle_get",
      "rule": "other",
      "why": "Binding of callee 'db' parameter to caller get_object_handle_db(session); origin is TA-managed handle DB",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct handle_db*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "obj_handle = handle_get(get_object_handle_db(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 232,
      "function": "handle_get",
      "rule": "other",
      "why": "Binding of callee 'ptr' parameter to caller 'obj' (object pointer created earlier); ptr originates from TEE-allocated object built from REE-derived attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "obj_handle = handle_get(get_object_handle_db(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 628,
      "function": "handle_get",
      "rule": "other",
      "why": "Binding of callee 'db' parameter to caller 'object_db' at alternative call site; db is TA-managed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct handle_db*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "handle = handle_get(object_db, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 628,
      "function": "handle_get",
      "rule": "other",
      "why": "Binding of callee 'ptr' parameter to caller 'obj' at alternative call site; ptr is object pointer (TEE-managed)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "handle = handle_get(object_db, obj);"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from handle_get at lines [64]:
-- Call #1 at line 64 --
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c

// Call at line 64:
59:
60: p = TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *));
61: if (!p)
62: return 0;
63: db->ptrs = p;
64: >>> TEE_MemFill(db->ptrs + db->max_ptrs, 0,
65: (new_max_ptrs - db->max_ptrs) * sizeof(void *));
66: db->max_ptrs = new_max_ptrs;
67:
68:
69: db->ptrs[n] = ptr;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemFill", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemFill", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "dest",
      "value",
      "len",
      "db->ptrs",
      "db->max_ptrs",
      "new_max_ptrs"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "db->ptrs + db->max_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      },
      {
        "lhs": "len",
        "rhs": "(new_max_ptrs - db->max_ptrs) * sizeof(void *)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      },
      {
        "lhs": "db->ptrs",
        "rhs": "TEE_Realloc(db->ptrs, new_max_ptrs * sizeof(void *))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-63"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:43-44",
        "evidence": "null/invalid pointer checks before use: if (!db || !ptr || ptr == INVALID_HANDLE_PTR) return 0;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c",
      "line": 64,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "Destination pointer is db->ptrs + db->max_ptrs (TA-managed buffer) passed into MemFill; length derived from db fields used to initialize newly realloc'd region.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=(new_max_ptrs - db->max_ptrs) * sizeof(void *),src_sz=unknown,dst_sz=new_max_ptrs * sizeof(void *)"
        ]
      },
      "code_excerpt": "TEE_MemFill(db->ptrs + db->max_ptrs, 0, (new_max_ptrs - db->max_ptrs) * sizeof(void *));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "handle_get",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "Destination and length are derived from internal handle DB fields (TEE-private); value written is a constant zero and origin is not REE-tainted; pre-call null/invalid checks exist.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "none (operation uses TA-internal db fields and constant value)",
      "propagation_path": [
        "db->ptrs <- TEE_Realloc(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-63",
        "dest = db->ptrs + db->max_ptrs @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64",
        "TEE_MemFill(dest, 0, len) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:64"
      ],
      "sink": "TEE_MemFill writing zeros into newly allocated region (TEE-private)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls internal db fields (unlikely without other vulnerabilities)",
        "integer overflow in new_max_ptrs computation (not observed here)"
      ],
      "attack_scenario": "Not applicable in normal operation; an attacker would need to corrupt heap metadata or db fields earlier.",
      "impact": "Low — zero-initialization of TEE-private memory; no REE data exposure or direct memory corruption shown at this site."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "handle_get:60-66",
        "recommendation": "Validate new_max_ptrs does not overflow and that multiplication for allocation size is safe (check limits before realloc)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "dest is derived from TA-managed db->ptrs (TEE-private)",
        "written value is constant zero",
        "function performs null/invalid checks earlier (if (!db || !ptr ...))"
      ],
      "negative_indicators": [
        "size expressions use db->max_ptrs and new_max_ptrs; if these were corrupted an overflow could occur (no explicit overflow check)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "TEE_MemFill at line 64 initializes TA-private memory with a constant; no REE-tainted data flows into this call and existing null checks reduce immediate risk, so it is not a vulnerability for information disclosure or overflow as written.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The call writes a constant to TA-private memory with inputs derived from internal DB fields and has pre-checks; there is no REE-tainted data flow to this sink.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "handle_get:43-44",
      "evidence": "if (!db || !ptr || ptr == INVALID_HANDLE_PTR) return 0;"
    }
  ],
  "argument_safety": [
    {
      "arg": "db->ptrs + db->max_ptrs (dest)",
      "why_safe": "dest points into realloc'd TA-managed array; allocation and zero-fill follow realloc success",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:60-66"
    },
    {
      "arg": "len",
      "why_safe": "computed from new_max_ptrs - db->max_ptrs and sized by sizeof(void*); caller ensures realloc succeeded before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/handle.c:55-66"
    }
  ],
  "residual_risks": [
    "Potential integer overflow when computing new_max_ptrs * sizeof(void*) prior to TEE_Realloc if db->max_ptrs is large/corrupted; not demonstrated but worth hardening."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "All inputs to this call are TA-internal and allocator success is checked",
      "Value filled is constant zero"
    ],
    "negative_indicators": [
      "No explicit integer-overflow check on new_max_ptrs multiplication"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No REE-tainted or sensitive data flows to this TEE_MemFill call and existing checks ensure TEE_Realloc succeeded; primary residual concern is integer overflow of allocation size which is not observed here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); structural information-flow to REE observed on different line.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes generated key handles into caller-provided out buffer (REE-visible); potential information flow to REE occurs at this different sink line.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 232,
      "function": "handle_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Bindings at call-site: obj pointer (derived from templates from REE) passed into handle_get; structural aliasing risk noted.",
      "code_excerpt": "obj_handle = handle_get(get_object_handle_db(session), obj);"
    }
  ]
}
フロー #4: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretgenerate_random_key_valueremove_empty_attribute_remove_attributeTEE_MemMove

実行時間: 126.48秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20/CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-supplied attributes/template buffers (params -> template -> head) originating from REE-visible memrefs

シンク: TEE_MemMove calls at lines 75 and 84 that use attacker-influenced lengths/offsets

判定理由: Memory-safety issues are primary: attacker-controlled sizes are used without adequate bounds, enabling OOB reads/writes at the TEE_MemMove call sites; these are clear code-level weaknesses with direct data/control flow from REE-provided templates.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: generate_random_key_value
プロンプト 中間 (generate_random_key_value)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “generate_random_key_value” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [294]:
-- Call #1 at line 294 --
292: case PKCS11_CKM_AES_KEY_GEN:
293:
294: >>> rc = generate_random_key_value(&head);
295: if (rc)
296: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

166: static enum pkcs11_rc generate_random_key_value(struct obj_attrs **head)
167: { 168: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 169: void *data = NULL; 170: uint32_t data_size = 0; 171: uint32_t value_len = 0; 172: void *value = NULL; 173: 174: if (!*head) 175: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 176: 177: rc = get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size); 178: if (rc || data_size != sizeof(uint32_t)) { 179: DMSG("%s", rc ? "No attribute value_len found" : 180: "Invalid size for attribute VALUE_LEN"); 181: 182: return PKCS11_CKR_ATTRIBUTE_VALUE_INVALID; 183: } 184: TEE_MemMove(&value_len, data, data_size); 185: 186: 187: rc = remove_empty_attribute(head, PKCS11_CKA_VALUE); 188: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 189: return PKCS11_CKR_GENERAL_ERROR; 190: 191: value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO); 192: if (!value) 193: return PKCS11_CKR_DEVICE_MEMORY; 194: 195: TEE_GenerateRandom(value, value_len); 196: 197: rc = add_attribute(head, PKCS11_CKA_VALUE, value, value_len); 198: 199: TEE_Free(value); 200: 201: return rc; 202: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "generate_random_key_value", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"generate_random_key_value", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (generate_random_key_value)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "generate_random_key_value",
    "tainted_vars": [
      "*head",
      "data",
      "data_size",
      "value_len",
      "value",
      "value (allocated buffer)"
    ],
    "propagation": [
      {
        "lhs": "data, data_size",
        "rhs": "get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:177-184"
      },
      {
        "lhs": "value_len",
        "rhs": "TEE_MemMove(&value_len, data, data_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:184"
      },
      {
        "lhs": "value",
        "rhs": "TEE_Malloc(value_len, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191-193"
      },
      {
        "lhs": "value (filled)",
        "rhs": "TEE_GenerateRandom(value, value_len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:195"
      },
      {
        "lhs": "*head (modified)",
        "rhs": "add_attribute(head, PKCS11_CKA_VALUE, value, value_len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:197-199"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:174-176",
        "evidence": "checks *head is non-NULL"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:177-183",
        "evidence": "ensures data_size == sizeof(uint32_t) before copying into value_len"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 294,
      "function": "generate_random_key_value",
      "rule": "other",
      "why": "callee parameter **head is bound to caller's head pointer (passed as &head); origin (allocated in caller) not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_random_key_value(&head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "rule": "weak_input_validation",
      "why": "value_len derived from attribute (originating from template/serialargs) is used to TEE_Malloc without an explicit upper bound check",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    }
  ]
}

関数: remove_empty_attribute
プロンプト 中間 (remove_empty_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “remove_empty_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_random_key_value at lines [187]:
-- Call #1 at line 187 --
185:
186:
187: >>> rc = remove_empty_attribute(head, PKCS11_CKA_VALUE);
188: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
189: return PKCS11_CKR_GENERAL_ERROR;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

98: enum pkcs11_rc remove_empty_attribute(struct obj_attrs **head,
99: uint32_t attribute)
100: { 101: return _remove_attribute(head, attribute, true ); 102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "remove_empty_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"remove_empty_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (remove_empty_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": [
      "head",
      "attribute"
    ],
    "propagation": [
      {
        "lhs": "_remove_attribute(head, attribute, true) return",
        "rhs": "remove_empty_attribute delegates to _remove_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:101-101"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 187,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "Caller-provided pointer 'head' is forwarded into callee (alias of caller's head); origin not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = remove_empty_attribute(head, PKCS11_CKA_VALUE);"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from remove_empty_attribute at lines [101, 200]:
-- Call #1 at line 101 --
99: uint32_t attribute)
100: { 101: >>> return _remove_attribute(head, attribute, true ); 102: }
103:
-- Call #2 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      },
      {
        "lhs": "memory region starting at cur",
        "rhs": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off)) (overwrites within h)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_guard",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72",
        "evidence": "for (; cur < end; cur += next_off) prevents iterating past end but does not bound next_off used in subsequent copy"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "Pointer 'head' (caller-owned) is forwarded into _remove_attribute; origin not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (derived from memory within h, potentially attacker-controlled) to compute next_off and perform an in-place TEE_MemMove without an explicit upper bound on next_off",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "destination pointer passed to TEE_MemMove (call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "src",
        "rhs": "source pointer passed to TEE_MemMove (call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "len",
        "rhs": "length argument passed to TEE_MemMove (call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination &pkcs11_ref is local (TEE-private) while source 'cur' derives from *head memory whose provenance is caller-controlled/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz= h->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size-derived next_off to compute an in-place memmove length (end - (cur + next_off)) without an explicit upper bound on pkcs11_ref.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: attr buffer (dst) is written from attr_ptr (src) with size 'size'; attr/attr_ptr provenance comes from caller-managed structures",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: copies 'ref' into local head variable; 'ref' provenance (caller buffer) not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: copies prefix (caller-provided) into pre buffer which may be uninitialized; origin of prefix is external",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur where only loop guard 'cur < end' is enforced; no check that end - cur >= sizeof(pkcs11_ref), allowing an out-of-bounds read if attrs_size or cur are attacker-controlled.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Performs in-place memmove using next_off derived from pkcs11_ref.size (attacker-influenced) to compute copy length end - (cur + next_off) without upper/lower bounds, enabling out-of-bounds reads/writes or malformed lengths.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20/CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-supplied attributes/template buffers (params -> template -> head) originating from REE-visible memrefs",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_generate_secret @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:289",
        "entry_generate_secret -> create_attributes_from_template / generate_random_key_value -> head @ processing.c:263-266,294",
        "head passed into _remove_attribute(head, ...) @ attributes.c:61-64",
        "_remove_attribute reads header fields from cur and uses pkcs11_ref.size to compute next_off and copy lengths @ attributes.c:75-76,84"
      ],
      "sink": "TEE_MemMove calls at lines 75 and 84 that use attacker-influenced lengths/offsets"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or influences attribute/template bytes supplied via REE-visible params",
        "attrs_size or attribute entries contain crafted sizes (pkcs11_ref.size) that violate expected bounds"
      ],
      "attack_scenario": "Maliciously crafted attribute list causes _remove_attribute to compute next_off or permit a cur position where sizeof(pkcs11_ref) exceeds remaining bytes, leading to OOB read at line 75 or an in-place memmove with malformed length at line 84, potentially corrupting heap metadata or leaking memory.",
      "impact": "Memory corruption (read/write) leading to crash, information leakage, or arbitrary code execution in TA context depending on allocator/heap layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes.c:75-76|84",
        "recommendation": "Validate that (end - cur) >= sizeof(pkcs11_attribute_head) before reading header; validate pkcs11_ref.size and next_off against h->attrs_size and minimum/maximum sensible limits before using in arithmetic or memmove."
      },
      {
        "type": "range_check",
        "location": "processing.c:191",
        "recommendation": "Validate value_len from template is within allowed maximum before TEE_Malloc to avoid excessively large allocations."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of attacker-influenced pkcs11_ref.size to compute next_off used in memmove",
        "Loop guard only ensures cur < end, not that remaining bytes >= sizeof(header)",
        "Multiple memmove calls in same function operate on offsets derived from data read from buffer"
      ],
      "negative_indicators": [
        "There is a loop guard cur < end which reduces some cases of over-read, but is insufficient",
        "No explicit evidence of REE vs TEE provenance for all buffers (some src_region unknown)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issues are primary: attacker-controlled sizes are used without adequate bounds, enabling OOB reads/writes at the TEE_MemMove call sites; these are clear code-level weaknesses with direct data/control flow from REE-provided templates.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads pkcs11 header via memmove without ensuring sufficient remaining bytes (end - cur >= sizeof(header))."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Uses pkcs11_ref.size-derived next_off to compute in-place memmove length without validating next_off or ensuring bounds, allowing OOB memory operations."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_guard",
      "location": "attributes.c:72",
      "evidence": "for (; cur < end; cur += next_off) prevents iterating past end but does not ensure header-sized reads are safe"
    },
    {
      "type": "type_validation",
      "location": "processing.c:177-184",
      "evidence": "Checks data_size == sizeof(uint32_t) before copying into value_len"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "validated non-NULL before use in generate_random_key_value",
      "evidence": "processing.c:174-176"
    }
  ],
  "residual_risks": [
    "Line 75/84 memory-safety findings suppress information-disclosure classification on these lines; potential info-leak remains if reads expose sensitive values elsewhere."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct arithmetic on attacker-influenced sizes",
      "Memmove lengths computed from those sizes"
    ],
    "negative_indicators": [
      "Some provenance entries are 'unknown' for src_region"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Prioritize memory-safety: both TEE_MemMove calls use lengths/offsets derived from untrusted template/attribute bytes without sufficient bounds; this is a high-confidence vulnerability requiring bounds/range checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "why": "Allocates value using value_len derived from template attribute without an explicit upper bound check.",
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Caller 'head' pointer is forwarded into helper; provenance of that buffer is not proven TEE-private.",
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    }
  ]
}
フロー #5: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> tee2pkcs_rsa_attributes -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keystee2pkcs_rsa_attributesremove_empty_attribute_remove_attributeTEE_MemMove

実行時間: 157.13秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE‑120

深刻度: HIGH

テイントフロー:

ソース: Caller-supplied attribute templates/obj_attrs (originating from REE via params)

シンク: TEE_MemMove calls at lines 75 (header read) and 84 (in-place shift) operating on REE-derived buffer regions

判定理由: Memory-safety issues take precedence: both header read and in-place shift use sizes derived from potentially REE-controlled fields without sufficient local bounds checks, enabling out-of-bounds read and shared-memory overwrite in REE-visible buffers.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: generate_rsa_keys
プロンプト 中間 (generate_rsa_keys)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “generate_rsa_keys” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [519]:
-- Call #1 at line 519 --
517: break;
518: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN:
519: >>> rc = generate_rsa_keys(proc_params, &pub_head, &priv_head);
520: break;
521: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c

687: enum pkcs11_rc generate_rsa_keys(struct pkcs11_attribute_head *proc_params,
688: struct obj_attrs **pub_head,
689: struct obj_attrs **priv_head)
690: { 691: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 692: void *a_ptr = NULL; 693: uint32_t a_size = 0; 694: TEE_ObjectHandle tee_obj = TEE_HANDLE_NULL; 695: TEE_Result res = TEE_ERROR_GENERIC; 696: uint32_t modulus_bits = 0; 697: TEE_Attribute tee_attrs[1] = { }; 698: uint32_t tee_count = 0; 699: 700: if (!proc_params || !*pub_head || !*priv_head) 701: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 702: 703: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, 704: &a_size); 705: if (rc != PKCS11_CKR_OK || a_size != sizeof(uint32_t)) 706: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 707: 708: TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t)); 709: 710: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, 711: &a_size); 712: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 713: return rc; 714: 715: if (rc == PKCS11_CKR_OK && a_ptr) { 716: TEE_InitRefAttribute(&tee_attrs[tee_count], 717: TEE_ATTR_RSA_PUBLIC_EXPONENT, 718: a_ptr, a_size); 719: tee_count++; 720: } 721: 722: if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) || 723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) || 724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) || 725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) || 726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) || 727: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) || 728: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) || 729: remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) { 730: EMSG("Unexpected attribute(s) found"); 731: rc = PKCS11_CKR_TEMPLATE_INCONSISTENT; 732: goto out; 733: } 734: 735: 736: res = TEE_AllocateTransientObject(TEE_TYPE_RSA_KEYPAIR, modulus_bits, 737: &tee_obj); 738: if (res) { 739: DMSG("TEE_AllocateTransientObject failed %#"PRIx32, res); 740: 741: rc = tee2pkcs_error(res); 742: goto out; 743: } 744: 745: res = TEE_RestrictObjectUsage1(tee_obj, TEE_USAGE_EXTRACTABLE); 746: if (res) { 747: DMSG("TEE_RestrictObjectUsage1 failed %#"PRIx32, res); 748: 749: rc = tee2pkcs_error(res); 750: goto out; 751: } 752: 753: res = TEE_GenerateKey(tee_obj, modulus_bits, tee_attrs, tee_count); 754: if (res) { 755: DMSG("TEE_GenerateKey failed %#"PRIx32, res); 756: 757: rc = tee2pkcs_error(res); 758: goto out; 759: } 760: 761: rc = tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj); 762: 763: out: 764: if (tee_obj != TEE_HANDLE_NULL) 765: TEE_CloseObject(tee_obj); 766: 767: return rc; 768: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "generate_rsa_keys", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"generate_rsa_keys", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (generate_rsa_keys)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "generate_rsa_keys",
    "tainted_vars": [
      "proc_params",
      "pub_head",
      "priv_head",
      "a_ptr",
      "a_size",
      "modulus_bits",
      "tee_obj",
      "tee_attrs"
    ],
    "propagation": [
      {
        "lhs": "a_ptr,a_size",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-705"
      },
      {
        "lhs": "modulus_bits",
        "rhs": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:708-709"
      },
      {
        "lhs": "tee_obj",
        "rhs": "TEE_AllocateTransientObject(TEE_TYPE_RSA_KEYPAIR, modulus_bits, &tee_obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:736-737"
      },
      {
        "lhs": "tee_attrs[tee_count]",
        "rhs": "TEE_InitRefAttribute(..., a_ptr, a_size) when public exponent provided",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:715-719"
      },
      {
        "lhs": "rc",
        "rhs": "tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:761"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-706",
        "evidence": "Checks rc == PKCS11_CKR_OK and a_size == sizeof(uint32_t) before using attribute as modulus_bits"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 519,
      "function": "generate_rsa_keys",
      "rule": "other",
      "why": "alias of proc_params pointer (originates upstream) passed into generate_rsa_keys from entry_generate_key_pair",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_rsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 519,
      "function": "generate_rsa_keys",
      "rule": "other",
      "why": "alias of pub_head pointer passed by reference into callee; pub_head may originate from templates built from REE data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_rsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 519,
      "function": "generate_rsa_keys",
      "rule": "other",
      "why": "alias of priv_head pointer passed by reference into callee; priv_head may contain attributes originating from templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_rsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "generate_rsa_keys",
      "rule": "other",
      "why": "Copies attribute bytes (a_ptr) into local modulus_bits via TEE_MemMove; a_ptr provenance uncertain (could be from processed template), but size is validated prior",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=a_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    }
  ]
}

関数: tee2pkcs_rsa_attributes
プロンプト 中間 (tee2pkcs_rsa_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “tee2pkcs_rsa_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_rsa_keys at lines [761]:
-- Call #1 at line 761 --
759: }
760:
761: >>> rc = tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj);
762:
763: out:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c

612: static enum pkcs11_rc tee2pkcs_rsa_attributes(struct obj_attrs **pub_head,
613: struct obj_attrs **priv_head,
614: TEE_ObjectHandle tee_obj)
615: { 616: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 617: void *a_ptr = NULL; 618: 619: rc = tee2pkcs_add_attribute(pub_head, PKCS11_CKA_MODULUS, tee_obj, 620: TEE_ATTR_RSA_MODULUS); 621: if (rc) 622: goto out; 623: 624: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, 625: NULL); 626: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 627: goto out; 628: 629: if (rc == PKCS11_CKR_OK && !a_ptr) { 630: rc = remove_empty_attribute(pub_head, 631: PKCS11_CKA_PUBLIC_EXPONENT); 632: if (rc) 633: goto out; 634: rc = PKCS11_RV_NOT_FOUND; 635: } 636: 637: if (rc == PKCS11_RV_NOT_FOUND) { 638: rc = tee2pkcs_add_attribute(pub_head, 639: PKCS11_CKA_PUBLIC_EXPONENT, 640: tee_obj, 641: TEE_ATTR_RSA_PUBLIC_EXPONENT); 642: if (rc) 643: goto out; 644: } 645: 646: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_MODULUS, tee_obj, 647: TEE_ATTR_RSA_MODULUS); 648: if (rc) 649: goto out; 650: 651: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT, 652: tee_obj, TEE_ATTR_RSA_PUBLIC_EXPONENT); 653: if (rc) 654: goto out; 655: 656: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT, 657: tee_obj, TEE_ATTR_RSA_PRIVATE_EXPONENT); 658: if (rc) 659: goto out; 660: 661: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIME_1, tee_obj, 662: TEE_ATTR_RSA_PRIME1); 663: if (rc) 664: goto out; 665: 666: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIME_2, tee_obj, 667: TEE_ATTR_RSA_PRIME2); 668: if (rc) 669: goto out; 670: 671: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EXPONENT_1, tee_obj, 672: TEE_ATTR_RSA_EXPONENT1); 673: if (rc) 674: goto out; 675: 676: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EXPONENT_2, tee_obj, 677: TEE_ATTR_RSA_EXPONENT2); 678: if (rc) 679: goto out; 680: 681: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_COEFFICIENT, tee_obj, 682: TEE_ATTR_RSA_COEFFICIENT); 683: out: 684: return rc; 685: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "tee2pkcs_rsa_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"tee2pkcs_rsa_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (tee2pkcs_rsa_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "tee2pkcs_rsa_attributes",
    "tainted_vars": [
      "pub_head",
      "priv_head",
      "tee_obj",
      "a_ptr",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "tee2pkcs_add_attribute(pub_head, PKCS11_CKA_MODULUS, tee_obj, TEE_ATTR_RSA_MODULUS)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:619-621"
      },
      {
        "lhs": "a_ptr",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, NULL)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:624-625"
      },
      {
        "lhs": "rc",
        "rhs": "tee2pkcs_add_attribute(..., TEE_ATTR_RSA_PUBLIC_EXPONENT) when public exponent missing",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:637-644"
      },
      {
        "lhs": "rc",
        "rhs": "series of tee2pkcs_add_attribute calls adding private RSA components into priv_head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:646-682"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:624-627",
        "evidence": "Checks get_attribute_ptr return value against PKCS11_CKR_OK and PKCS11_RV_NOT_FOUND"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 761,
      "function": "tee2pkcs_rsa_attributes",
      "rule": "other",
      "why": "alias of pub_head pointer passed from caller (may originate from templates built from REE data) into tee2pkcs_rsa_attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 761,
      "function": "tee2pkcs_rsa_attributes",
      "rule": "other",
      "why": "alias of priv_head pointer passed from caller (may contain attributes derived from REE templates) into tee2pkcs_rsa_attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 761,
      "function": "tee2pkcs_rsa_attributes",
      "rule": "other",
      "why": "alias of tee_obj handle (TEE-private key object) passed into helper for attribute extraction",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_rsa_attributes(pub_head, priv_head, tee_obj);"
    }
  ]
}

関数: remove_empty_attribute
プロンプト 中間 (remove_empty_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “remove_empty_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_rsa_attributes at lines [630, 722, 723, 724, 725, 726, 727, 728, 729]:
-- Call #1 at line 630 --
628:
629: if (rc == PKCS11_CKR_OK && !a_ptr) { 630: >>> rc = remove_empty_attribute(pub_head, 631: PKCS11_CKA_PUBLIC_EXPONENT); 632: if (rc) -- Call #2 at line 722 -- 720: }
721:
722: >>> if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
-- Call #3 at line 723 --
721:
722: if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
-- Call #4 at line 724 --
722: if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
-- Call #5 at line 725 --
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
-- Call #6 at line 726 --
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
-- Call #7 at line 727 --
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: >>> remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729:     	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
-- Call #8 at line 728 --
726:     	    remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729:     	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
730:     		EMSG("Unexpected attribute(s) found");
-- Call #9 at line 729 --
727:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
730:     		EMSG("Unexpected attribute(s) found");
731:     		rc = PKCS11_CKR_TEMPLATE_INCONSISTENT;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

98: enum pkcs11_rc remove_empty_attribute(struct obj_attrs **head,
99: uint32_t attribute)
100: {
101: return _remove_attribute(head, attribute, true );
102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"remove_empty_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (remove_empty_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "_remove_attribute"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "_remove_attribute(head, attribute, true)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:98-101"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 630,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of pub_head pointer (originating from templates) passed into remove_empty_attribute from tee2pkcs_rsa_attributes; head may reference data derived from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = remove_empty_attribute(pub_head, PKCS11_CKA_PUBLIC_EXPONENT);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 722,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer passed repeatedly into remove_empty_attribute to check/remove private RSA components; priv_head may contain attributes derived from REE templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) || ... )"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from remove_empty_attribute at lines [101, 200]:
-- Call #1 at line 101 --
99: uint32_t attribute)
100: { 101: >>> return _remove_attribute(head, attribute, true ); 102: }
103:
-- Call #2 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "pkcs11_ref.id"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70-76",
        "evidence": "Loop bounds use h->attrs_size and pkcs11_ref.size to compute offsets; no additional validation of pkcs11_ref.size beyond loop bounds"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller (remove_empty_attribute) into _remove_attribute; head may reference data derived from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller into _remove_attribute at non-empty removal site; provenance may be REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "Reads attribute header from cur via TEE_MemMove into local pkcs11_ref; source (cur) may be in REE-derived buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "shared_memory_overwrite",
      "why": "In-place memmove shifts trailing attributes within head buffer (cur <- cur+next_off) where buffer may be REE-visible and next_off is derived from REE-controlled size field without independent bounds validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite",
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "memory region at cur..end",
        "rhs": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      },
      {
        "lhs": "attr",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "cli_head",
        "rhs": "TEE_MemMove(&cli_head, cur, sizeof(cli_head))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      },
      {
        "lhs": "prefix2",
        "rhs": "TEE_MemMove(prefix2, prefix, prefix_len + 1)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "data[0]",
        "rhs": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353"
      },
      {
        "lhs": "head",
        "rhs": "TEE_MemMove(&head, ref, sizeof(head))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      },
      {
        "lhs": "pre",
        "rhs": "TEE_MemMove(pre, prefix, strlen(prefix))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70-76",
        "evidence": "Loop uses h->attrs_size and pkcs11_ref.size to compute offsets before memmoves"
      },
      {
        "kind": "size_limit",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352-354",
        "evidence": "MIN(pkcs11_ref.size, sizeof(data)) used when copying into small local buffer"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads attribute header from cur (possibly REE-derived) into local pkcs11_ref via TEE_MemMove; source provenance uncertain",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "shared_memory_overwrite",
      "why": "In-place shift of trailing attributes (cur <- cur+next_off) uses next_off derived from REE-controlled size field without an independent bound check",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite",
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value from attr_ptr into attr buffer; attr_ptr provenance may be REE-derived",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads client-provided attribute header into local cli_head via memmove; source may be REE-visible",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header into local pkcs11_ref from ref_attr which may be in REE-managed memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string from prefix (possibly REE-origin) into local prefix2 buffer without explicit max bound beyond prefix_len",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Extracts up to MIN(pkcs11_ref.size, sizeof(data)) bytes into small local buffer, uses MIN to limit copy",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header struct from ref into local head via memmove; ref source may be REE-managed",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; pre may point into TEEspace but prefix provenance uncertain",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Fixed-size header copied from cur into local pkcs11_ref where cur/end derive from head->attrs_size (potentially REE-controlled) and loop check uses cur<end but does not ensure end - cur >= sizeof(pkcs11_ref), enabling out-of-bounds read.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "In-place memmove shifts trailing attributes within the caller-provided buffer using next_off computed from a REE-influenced pkcs11_ref.size without independent bounds checks, allowing REE-driven overwrite of shared memory.",
      "rule_id": "shared_memory_overwrite"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑120",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-supplied attribute templates/obj_attrs (originating from REE via params)",
      "propagation_path": [
        "params -> pub_template/priv_template @ processing.c:425-431",
        "pub_head/priv_head built from templates -> passed into generate_rsa_keys @ processing.c:519",
        "pub_head/priv_head -> tee2pkcs_rsa_attributes @ processing_rsa.c:761",
        "head (obj_attrs) -> _remove_attribute via remove_empty_attribute @ attributes.c:98/101",
        "cur/end computed from h->attrs_size and used in TEE_MemMove @ attributes.c:70-75,84"
      ],
      "sink": "TEE_MemMove calls at lines 75 (header read) and 84 (in-place shift) operating on REE-derived buffer regions"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed attribute list / attrs_size in params leading to h->attrs_size inconsistent with actual buffer",
        "TA does not perform independent validation of h->attrs_size or per-entry size fields"
      ],
      "attack_scenario": "Crafted attrs_size or pkcs11_ref.size cause the header read at line 75 to read past the buffer or next_off to be manipulated so the in-place memmove at line 84 copies/overwrites data out-of-bounds, potentially corrupting memory or leaking contents when later copied to REE.",
      "impact": "Memory corruption in TEE (denial-of-service via panic/abort or more severe integrity compromise); potential disclosure of adjacent memory if later copied to REE."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "_remove_attribute:70-76",
        "recommendation": "Verify end - cur >= sizeof(pkcs11_attribute_head) before copying header and validate pkcs11_ref.size against remaining bytes."
      },
      {
        "type": "range_check",
        "location": "_remove_attribute:76-84",
        "recommendation": "Ensure computed next_off is within [0, h->attrs_size] and that cur + next_off <= end before performing in-place memmove."
      },
      {
        "type": "type_validation",
        "location": "entry_generate_key_pair / parsing code:415-431",
        "recommendation": "Validate templates and attrs_size fields received from REE early and reject inconsistent sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop bounds derive from h->attrs_size and code lacks explicit check ensuring sizeof(header) fits in remaining bytes",
        "next_off computed from pkcs11_ref.size (attacker-controlled) used directly in memmove length"
      ],
      "negative_indicators": [
        "There is a loop boundary cur < end which provides some limitation",
        "Some callers validate attribute sizes earlier for specific attributes"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issues take precedence: both header read and in-place shift use sizes derived from potentially REE-controlled fields without sufficient local bounds checks, enabling out-of-bounds read and shared-memory overwrite in REE-visible buffers.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header-sized read from cur may exceed remaining buffer (no check that end - cur >= sizeof(header))."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "shared_memory_overwrite",
        "why": "In-place memmove uses next_off derived from REE-influenced pkcs11_ref.size without independent bounds checks, enabling overwrite of REE-visible buffer."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bound_check",
      "location": "_remove_attribute:72",
      "evidence": "for (; cur < end; cur += next_off) uses end = cur + h->attrs_size"
    },
    {
      "type": "size_limit",
      "location": "attributes.c:352-354",
      "evidence": "MIN(pkcs11_ref.size, sizeof(data)) used when copying into small local buffer"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated upstream in some paths",
      "evidence": "processing.c:425-431 and checks in entry_generate_key_pair"
    }
  ],
  "residual_risks": [
    "Line 84 promotion to shared_memory_overwrite suppresses discussion of potential info disclosure from later copies of adjacent memory into REE (could be possible if corrupted data later copied out)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of REE-derived sizes in memmove length calculations",
      "Lack of explicit checks ensuring header size fits remaining bytes"
    ],
    "negative_indicators": [
      "Loop termination condition offers partial bounding (cur < end) but not strong enough"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Both TEE_MemMove sites operate on buffers whose bounds and per-entry sizes are controlled or influenced by REE-provided data; insufficient local validation yields high-confidence memory-safety vulnerabilities (OOB read and overwrite).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Fixed-size header read from REE-derived region without explicit check that remaining bytes >= header size.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite",
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "why": "In-place shift within REE-visible buffer uses next_off derived from REE-controlled pkcs11_ref.size without independent validation, enabling overwrite.",
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}
フロー #6: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keysremove_empty_attribute_remove_attributeTEE_MemMove

実行時間: 112.24秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: Attributes buffer (obj_attrs->attrs) ultimately derived from caller-provided templates (REE-visible)

シンク: TEE_MemMove calls at lines 75 and 84 that read sizes from untrusted memory and use them to compute copy offsets

判定理由: Memory-safety risk takes precedence: untrusted size is used to compute memmove offsets without adequate validation, producing clear potential for out-of-bounds read/write and memory corruption at the two examined sink lines.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: remove_empty_attribute
プロンプト 中間 (remove_empty_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “remove_empty_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_rsa_keys at lines [722, 723, 724, 725, 726, 727, 728, 729]:
-- Call #1 at line 722 --
720: }
721:
722: >>> if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
-- Call #2 at line 723 --
721:
722: if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
-- Call #3 at line 724 --
722: if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
-- Call #4 at line 725 --
723: remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
-- Call #5 at line 726 --
724: remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: >>> remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
-- Call #6 at line 727 --
725: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||
726: remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727: >>> remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729:     	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
-- Call #7 at line 728 --
726:     	    remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||
727:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729:     	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
730:     		EMSG("Unexpected attribute(s) found");
-- Call #8 at line 729 --
727:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||
728:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||
729: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {
730:     		EMSG("Unexpected attribute(s) found");
731:     		rc = PKCS11_CKR_TEMPLATE_INCONSISTENT;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

98: enum pkcs11_rc remove_empty_attribute(struct obj_attrs **head,
99: uint32_t attribute)
100: {
101: return _remove_attribute(head, attribute, true );
102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"remove_empty_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (remove_empty_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "_remove_attribute"
    ],
    "propagation": [
      {
        "lhs": "remove_empty_attribute(head, attribute)",
        "rhs": "_remove_attribute(head, attribute, true)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:98-101"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 722,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (remove_empty_attribute(priv_head, PKCS11_CKA_MODULUS) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 723,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 724,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 725,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_1) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 726,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_PRIME_2) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 727,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_1) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 728,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_EXPONENT_2) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 729,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (caller-provided obj_attrs*) passed by reference into remove_empty_attribute from generate_rsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_COEFFICIENT)) {"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from remove_empty_attribute at lines [101, 200]:
-- Call #1 at line 101 --
99: uint32_t attribute)
100: { 101: >>> return _remove_attribute(head, attribute, true ); 102: }
103:
-- Call #2 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "a_ptr"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64-66"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "memory at cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      },
      {
        "lhs": "h->attrs_size,h->attrs_count",
        "rhs": "adjusted after memmove of tail data",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84-88"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72-76",
        "evidence": "loop uses cur<end as bound but next_off derived from untrusted pkcs11_ref.size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from remove_empty_attribute at call-site; head may originate from higher-level templates built from REE data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller into _remove_attribute at line 200; provenance may be REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from cur into local pkcs11_ref using TEE_MemMove where pkcs11_ref.size is later used to compute next_off; size originates from memory and is only implicitly bounded by end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "Shifts tail data left with TEE_MemMove(cur, cur + next_off, end - (cur + next_off)) using next_off derived from untrusted attribute size; may under/overlap and affects attrs_size/count",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer (varies by call-site)",
        "site": "multiple sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (varies by call-site)",
        "site": "multiple sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "len",
        "rhs": "call-site computed length argument (varies; sometimes derived from untrusted headers)",
        "site": "multiple sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72-76",
        "evidence": "loop uses cur < end as bound before reading header, but subsequent next_off uses pkcs11_ref.size"
      },
      {
        "kind": "size_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:705-706",
        "evidence": "Some call-sites validate attribute size equals expected (e.g., modulus_bits check) before memmove into typed local"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from untrusted memory into local pkcs11_ref via TEE_MemMove; pkcs11_ref.size then controls subsequent offsets without strong bounds before use",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Shifts tail data left using length computed from next_off derived from untrusted attribute size; overlapping move within same buffer may be unsafe if sizes are malicious",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies caller-supplied prefix into pre buffer via TEE_MemMove; origin of pre and prefix may be caller-controlled leading to potential overflow if not validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination &pkcs11_ref originates as callee-local (TEE-private) while source cur is buffer derived from head; record aliasing of pointers at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: dest cur and src cur+next_off are pointers into the same attrs buffer (aliasing); length depends on untrusted header-derived next_off",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies attribute header from cur into local pkcs11_ref where pkcs11_ref.size (from untrusted memory) is then used to compute offsets; loop bound cur<end does not ensure next_off is safe, allowing malformed size to cause over-read or corrupt control flow.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Shifts tail data using length derived from next_off which is computed from untrusted pkcs11_ref.size; insufficient validation can produce out-of-bounds or overlapping memmove leading to memory corruption.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Attributes buffer (obj_attrs->attrs) ultimately derived from caller-provided templates (REE-visible)",
      "propagation_path": [
        "params (caller) -> templates -> pub_head/priv_head @ processing.c",
        "pub_head/priv_head -> attribute data placed in attrs buffer -> passed into _remove_attribute @ attributes.c:64",
        "cur (pointer into attrs buffer) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:75",
        "pkcs11_ref.size -> next_off -> TEE_MemMove(cur, cur + next_off, ...) @ attributes.c:84"
      ],
      "sink": "TEE_MemMove calls at lines 75 and 84 that read sizes from untrusted memory and use them to compute copy offsets"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed attribute data supplied via REE-visible templates/params.",
        "No additional upstream validation ensuring pkcs11_ref.size and next_off keep operations within attrs buffer bounds."
      ],
      "attack_scenario": "Provide a crafted attribute header with pkcs11_ref.size that causes next_off to point beyond attrs buffer, triggering an over-read at line 75 or an out-of-bounds/overlapping memmove at line 84 to corrupt heap/adjacent metadata or cause crashes.",
      "impact": "Memory corruption within TA (out-of-bounds read/write), possible denial-of-service (panic/crash) or exploitation for code execution depending on allocator/state."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes.c:75-84",
        "recommendation": "Validate that sizeof(pkcs11_ref) <= end - cur and that next_off = sizeof(pkcs11_ref)+pkcs11_ref.size does not exceed end - cur before using it to compute memmoves."
      },
      {
        "type": "range_check",
        "location": "attributes.c:76",
        "recommendation": "Sanity-check pkcs11_ref.size against a maximum allowed attribute size and ensure next_off > 0 and next_off <= (end - cur)."
      },
      {
        "type": "mem_access_check",
        "location": "attributes.c:84",
        "recommendation": "Use safe overlap-aware copy helper or explicitly handle overlapping regions and ensure source/destination ranges are within buffer."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "pkcs11_ref.size is read from memory and used directly to compute copy offsets",
        "loop bound cur<end does not guarantee next_off is bounded relative to end",
        "multiple memmoves operate on same buffer using computed next_off"
      ],
      "negative_indicators": [
        "There is a loop bound cur<end which provides some upper limit (but insufficient for next_off)",
        "Some call-sites validate attribute sizes elsewhere for specific attributes (e.g., modulus_bits) which mitigates limited cases"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety risk takes precedence: untrusted size is used to compute memmove offsets without adequate validation, producing clear potential for out-of-bounds read/write and memory corruption at the two examined sink lines.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header into pkcs11_ref then uses pkcs11_ref.size to compute offsets without ensuring next_off fits within attrs buffer."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Moves tail data using length computed from untrusted next_off, enabling out-of-bounds or overlapping write into attrs buffer."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "attributes.c:72-76",
      "evidence": "Loop uses cur < end which limits iterations but does not validate pkcs11_ref.size against remaining buffer"
    },
    {
      "type": "size_check",
      "location": "processing_rsa.c:703-706",
      "evidence": "Some attribute usages validate expected size (e.g., modulus_bits) reducing exposure for those specific attributes"
    }
  ],
  "argument_safety": [
    {
      "arg": "head (obj_attrs*)",
      "why_safe": "Partially validated earlier in call chain (templates checked) but attrs_size can still contain attacker-controlled values",
      "evidence": "processing.c and prior checks; attrs_size used to set end @ attributes.c:71"
    }
  ],
  "residual_risks": [
    "Line 75/84 memory-safety finding suppresses consideration of info-disclosure (unencrypted_output) on these lines because primary risk is memory corruption.",
    "Other memmoves in the file may also be affected by unvalidated sizes (e.g., lines 119,187,220,265,298,344,352,353,435,447) and should be audited similarly."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of untrusted size fields to compute copy lengths",
      "No explicit check that next_off <= (end - cur) before memmove"
    ],
    "negative_indicators": [
      "Loop bound cur<end provides partial limit",
      "Certain attributes are validated elsewhere reducing exposure for those cases"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given direct use of untrusted size fields to compute memmove offsets without adequate range checks, the two sink lines present high-confidence memory-safety vulnerabilities (weak input validation) that can lead to OOB reads/writes and memory corruption.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reading pkcs11_ref from attrs buffer where pkcs11_ref.size influences offsets without explicit bounds validation.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "why": "Tail data moved using next_off derived from untrusted header, enabling overlapping/unsafe moves and attrs_size/count modifications.",
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}
フロー #7: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keysremove_empty_attribute_remove_attributeTEE_MemMove

実行時間: 149.21秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided obj_attrs blob (params templates originated from REE)

シンク: TEE_MemMove reads/writes driven by attacker-controlled sizes inside _remove_attribute

判定理由: Memory-safety issue (untrusted length used to compute copy offsets) is present at both lines; this yields high-confidence out-of-bounds read/write potential and takes precedence over information-disclosure classifications.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: generate_ec_keys
プロンプト 中間 (generate_ec_keys)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “generate_ec_keys” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [516]:
-- Call #1 at line 516 --
514: break;
515: case PKCS11_CKM_EC_KEY_PAIR_GEN:
516: >>> rc = generate_ec_keys(proc_params, &pub_head, &priv_head);
517: break;
518: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c

589: enum pkcs11_rc generate_ec_keys(struct pkcs11_attribute_head *proc_params,
590: struct obj_attrs **pub_head,
591: struct obj_attrs **priv_head)
592: { 593: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 594: void *a_ptr = NULL; 595: uint32_t a_size = 0; 596: uint32_t tee_size = 0; 597: uint32_t tee_curve = 0; 598: TEE_ObjectHandle tee_obj = TEE_HANDLE_NULL; 599: TEE_Attribute tee_key_attr[1] = { }; 600: TEE_Result res = TEE_ERROR_GENERIC; 601: 602: if (!proc_params || !*pub_head || !*priv_head) 603: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 604: 605: if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) || 606: remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) || 607: remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) { 608: EMSG("Unexpected attribute(s) found"); 609: trace_attributes("public-key", *pub_head); 610: trace_attributes("private-key", *priv_head); 611: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 612: } 613: 614: if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, 615: &a_ptr, &a_size) || !a_ptr) { 616: EMSG("No EC_PARAMS attribute found in public key"); 617: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 618: } 619: 620: tee_size = ec_params2tee_keysize(a_ptr, a_size); 621: if (!tee_size) 622: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 623: 624: tee_curve = ec_params2tee_curve(a_ptr, a_size); 625: 626: TEE_InitValueAttribute(tee_key_attr, TEE_ATTR_ECC_CURVE, tee_curve, 0); 627: 628: 629: res = TEE_AllocateTransientObject(TEE_TYPE_ECDSA_KEYPAIR, tee_size, 630: &tee_obj); 631: if (res) { 632: EMSG("Transient alloc failed with %#"PRIx32, res); 633: return tee2pkcs_error(res); 634: } 635: 636: res = TEE_RestrictObjectUsage1(tee_obj, TEE_USAGE_EXTRACTABLE); 637: if (res) { 638: rc = tee2pkcs_error(res); 639: goto out; 640: } 641: 642: res = TEE_GenerateKey(tee_obj, tee_size, tee_key_attr, 1); 643: if (res) { 644: rc = tee2pkcs_error(res); 645: goto out; 646: } 647: 648: 649: rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size); 650: if (rc) 651: goto out; 652: 653: rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size); 654: 655: out: 656: if (tee_obj != TEE_HANDLE_NULL) 657: TEE_CloseObject(tee_obj); 658: 659: return rc; 660: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "generate_ec_keys", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"generate_ec_keys", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (generate_ec_keys)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "generate_ec_keys",
    "tainted_vars": [
      "proc_params",
      "pub_head",
      "priv_head",
      "a_ptr",
      "a_size",
      "tee_size",
      "tee_curve",
      "tee_obj",
      "tee_key_attr",
      "res"
    ],
    "propagation": [
      {
        "lhs": "a_ptr,a_size",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:614-618"
      },
      {
        "lhs": "tee_size",
        "rhs": "ec_params2tee_keysize(a_ptr, a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:620-622"
      },
      {
        "lhs": "tee_curve",
        "rhs": "ec_params2tee_curve(a_ptr, a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:624"
      },
      {
        "lhs": "tee_obj",
        "rhs": "TEE_AllocateTransientObject(TEE_TYPE_ECDSA_KEYPAIR, tee_size, &tee_obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:629-634"
      },
      {
        "lhs": "TEE key material -> pub_head/priv_head",
        "rhs": "tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:653-654"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:602-604",
        "evidence": "checks for proc_params and *pub_head/*priv_head presence"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:614-622",
        "evidence": "a_ptr presence checked and tee_size validated (non-zero)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 516,
      "function": "generate_ec_keys",
      "rule": "other",
      "why": "alias of proc_params (derived from caller-controlled serialargs) passed into generate_ec_keys; proc_params originates from REE-provided params.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_ec_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 516,
      "function": "generate_ec_keys",
      "rule": "other",
      "why": "alias of pub_head pointer passed into callee (callee may write attributes back); pub_head originated from templates populated from REE data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_ec_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 516,
      "function": "generate_ec_keys",
      "rule": "other",
      "why": "alias of priv_head pointer passed into callee (callee may write private attributes); priv_head origin includes data from caller templates.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_ec_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 649,
      "function": "generate_ec_keys",
      "rule": "other",
      "why": "add_attribute copies a_ptr (derived from REE-provided EC_PARAMS) into priv_head without additional sanitization of content semantics.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 653,
      "function": "generate_ec_keys",
      "rule": "other",
      "why": "tee2pkcs_ec_attributes extracts key material from tee_obj into pub_head/priv_head (key material sensitivity); risk of handling secret key bytes in TA-managed structures.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=tee_size,src_sz=tee_size,dst_sz=pub_head->attrs_size+priv_head->attrs_size"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    }
  ]
}

関数: remove_empty_attribute
プロンプト 中間 (remove_empty_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “remove_empty_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_ec_keys at lines [605, 606, 607, 739, 740, 741, 742]:
-- Call #1 at line 605 --
603: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
604:
605: >>> if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
606: remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
607:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
-- Call #2 at line 606 --
604:     
605:     	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
606: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
607:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
608:     		EMSG("Unexpected attribute(s) found");
-- Call #3 at line 607 --
605:     	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
606:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
607: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
608:     		EMSG("Unexpected attribute(s) found");
609:     		trace_attributes("public-key", *pub_head);
-- Call #4 at line 739 --
737:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
738:     
739: >>> 	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
-- Call #5 at line 740 --
738:     
739:     	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
-- Call #6 at line 741 --
739:     	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
743:     		EMSG("Unexpected attribute(s) found");
-- Call #7 at line 742 --
740:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
743:     		EMSG("Unexpected attribute(s) found");
744:     		trace_attributes("public-key", *pub_head);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

98: enum pkcs11_rc remove_empty_attribute(struct obj_attrs **head,
99: uint32_t attribute)
100: {
101: return _remove_attribute(head, attribute, true );
102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"remove_empty_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (remove_empty_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "*head (caller-provided obj_attrs)",
      "returned value from _remove_attribute"
    ],
    "propagation": [
      {
        "lhs": "return",
        "rhs": "_remove_attribute(head, attribute, true)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:98-102"
      },
      {
        "lhs": "head",
        "rhs": "caller pub_head/priv_head (alias at call-sites in processing.c)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:605-607,739-742"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 605,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of pub_head pointer (caller-controlled template) passed into helper; head originates from REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 606,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer (caller template) passed into helper; head originates from REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 607,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer (caller template) passed into helper; head originates from REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 739,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of pub_head pointer (caller-controlled template) passed into helper at alternate call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 740,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer (caller template) passed into helper at alternate call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 741,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer (caller template) passed into helper at alternate call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 742,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer (caller template) passed into helper at alternate call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from remove_empty_attribute at lines [101, 200]:
-- Call #1 at line 101 --
99: uint32_t attribute)
100: { 101: >>> return _remove_attribute(head, attribute, true ); 102: }
103:
-- Call #2 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "pkcs11_ref.id"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "memory at cur (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:62-64",
        "evidence": "function assumes head non-NULL; wrapper callers check presence but not here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of caller-provided head passed through wrapper into _remove_attribute; head ultimately originates from REE-derived templates in caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head passed at alternate call-site into _remove_attribute; origin may be REE-visible templates.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from untrusted blob (cur) to compute next_off and then uses it to bound memmove without verifying next_off fits within remaining attrs; attacker-controlled size can cause out-of-bounds behavior.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "In-place memmove shifts remaining attributes using attacker-influenced next_off derived from pkcs11_ref.size; insufficient explicit bounds/sanity checks on pkcs11_ref.size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size - (cur - ((char*)h + sizeof(struct obj_attrs))),dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "call-site dst argument",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "src",
        "rhs": "call-site src argument",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "len",
        "rhs": "call-site length argument (expression may be attacker-controlled)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71-72",
        "evidence": "loop bounds set via h->attrs_size but pkcs11_ref.size not explicitly constrained before use"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst (&pkcs11_ref) is a local TA buffer while src (cur) points into obj_attrs blob derived from caller; binding of callee params to their origins.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - (cur),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies remainder of attribute list using next_off computed from untrusted pkcs11_ref.size without strong sanity checks; len expression may be attacker-controlled causing OOB or logic errors.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size - (cur - ((char*)h + sizeof(struct obj_attrs))),dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value into attr buffer from attr_ptr; binding shows src may originate from obj blob and dst may be TA-managed buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Small copy of attribute bytes into local buffer using MIN(pkcs11_ref.size, sizeof(data)); src originates from attribute blob (caller-controlled).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header 'head' from ref (likely caller-provided) into local head variable; binding shows ref origin may be REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads a pkcs11_attribute_head from cur (derived from caller-controlled obj_attrs) into local pkcs11_ref using fixed sizeof(pkcs11_ref) without proving that cur+sizeof(...) <= end; untrusted pkcs11_ref.size subsequently used to compute next_off.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Moves remaining attribute bytes using next_off computed from untrusted pkcs11_ref.size; no robust sanity on next_off or that (cur+next_off) is within end, enabling out-of-bounds read/write or logic corruption.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided obj_attrs blob (params templates originated from REE)",
      "propagation_path": [
        "params -> pub_template/priv_template (processing.c) @ processing.c:425-431",
        "pub_head/priv_head populated from templates -> passed into generate_ec_keys @ processing.c:516",
        "obj_attrs blob (h) used in _remove_attribute: h = *head @ attributes.c:64",
        "cur calculated from h and used as src in TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:75",
        "pkcs11_ref.size -> next_off -> used in TEE_MemMove(cur, cur + next_off, ...) @ attributes.c:84"
      ],
      "sink": "TEE_MemMove reads/writes driven by attacker-controlled sizes inside _remove_attribute"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted obj_attrs blob via REE-visible params/templates",
        "attrs_size and embedded pkcs11_ref.size fields are crafted to violate invariants"
      ],
      "attack_scenario": "Maliciously crafted attribute list with manipulated attrs_size and pkcs11_ref.size causes _remove_attribute to compute next_off that leads TEE_MemMove to read/write out of bounds, leading to memory corruption inside the TA.",
      "impact": "Memory corruption in TA leading to crash, data corruption, or potential code execution within TA context; confidentiality/integrity of TA secrets may be compromised."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "_remove_attribute:75-84",
        "recommendation": "Validate that cur + sizeof(pkcs11_ref) <= end before reading header; verify pkcs11_ref.size is sane and that cur + next_off <= end before any memmove."
      },
      {
        "type": "range_check",
        "location": "_remove_attribute:76-84",
        "recommendation": "Sanity-check next_off against h->attrs_size and non-zero/minimum bounds to prevent integer wrap or excessive lengths."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of untrusted pkcs11_ref.size to compute next_off",
        "TEE_MemMove invoked with lengths derived from untrusted fields",
        "Loop bounds originate from h->attrs_size which is attacker-controlled via templates"
      ],
      "negative_indicators": [
        "The outer loop uses cur < end which provides some bounding but is insufficient because pkcs11_ref.size is read from untrusted memory and next_off is not validated"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue (untrusted length used to compute copy offsets) is present at both lines; this yields high-confidence out-of-bounds read/write potential and takes precedence over information-disclosure classifications.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header read from untrusted cur into local pkcs11_ref without checking that sizeof header fits before read."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "In-place memmove using next_off computed from untrusted pkcs11_ref.size with no sufficient bounds/sanity checks."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "generate_ec_keys:602-622",
      "evidence": "Checks proc_params and computed tee_size non-zero"
    }
  ],
  "argument_safety": [
    {
      "arg": "head (obj_attrs **)",
      "why_safe": "Wrapper callers check presence of templates before calling, but attrs_size/content remain attacker-controlled",
      "evidence": "processing.c:425-431 / processing_ec.c:602-604"
    }
  ],
  "residual_risks": [
    "line 366: copy of rc to params[0].memref.buffer (TEE_MemMove) — memory-safety classification here prevents promotion to unencrypted_output, but confirm that returning TA-private secrets to REE does not occur elsewhere"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct, local use of untrusted sizes in memmove length calculations",
      "No explicit sanity check of pkcs11_ref.size or next_off before use"
    ],
    "negative_indicators": [
      "Loop has cur < end which offers partial bounding but insufficient against crafted internal sizes"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Both target sink lines perform memmoves whose lengths/offsets are derived from untrusted attribute data without adequate validation; this constitutes a memory-safety vulnerability with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - (cur),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reading attribute header from untrusted blob without checking header fits within remaining attrs_size.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size - (cur - ((char*)h + sizeof(struct obj_attrs))),dst_sz=h->attrs_size"
        ]
      },
      "why": "In-place shift of attribute bytes uses next_off from untrusted header without sufficient validation, risking OOB.",
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies key handles into caller-provided out buffer; structural risk but not promoted to unencrypted_output here.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #8: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_eddsa_keys -> remove_empty_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_eddsa_keysremove_empty_attribute_remove_attributeTEE_MemMove

実行時間: 126.44秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: Caller-provided attribute buffer (params → serialargs → templates → obj_attrs->attrs blob)

シンク: TEE_MemMove calls at attributes.c:75 and attributes.c:84 that read/shift memory using unvalidated sizes

判定理由: Memory-safety issues take precedence: both TEE_MemMove invocations use lengths and offsets derived from unvalidated parsed fields (attrs_size, pkcs11_ref.size) with insufficient checks, creating clear out-of-bounds read/write opportunities.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: generate_eddsa_keys
プロンプト 中間 (generate_eddsa_keys)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “generate_eddsa_keys” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [513]:
-- Call #1 at line 513 --
511:     	switch (proc_params->id) {
512:     	case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN:
513: >>> 		rc = generate_eddsa_keys(proc_params, &pub_head, &priv_head);
514:     		break;
515:     	case PKCS11_CKM_EC_KEY_PAIR_GEN:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c

725: enum pkcs11_rc generate_eddsa_keys(struct pkcs11_attribute_head *proc_params,
726: struct obj_attrs **pub_head,
727: struct obj_attrs **priv_head)
728: {
729: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
730: void *a_ptr = NULL;
731: uint32_t a_size = 0;
732: uint32_t tee_size = 0;
733: TEE_ObjectHandle tee_obj = TEE_HANDLE_NULL;
734: TEE_Result res = TEE_ERROR_GENERIC;
735:
736: if (!proc_params || !*pub_head || !*priv_head)
737: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
738:
739: if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740: remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741: remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742: remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
743: EMSG("Unexpected attribute(s) found");
744: trace_attributes("public-key", *pub_head);
745: trace_attributes("private-key", *priv_head);
746: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
747: }
748:
749: if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS,
750: &a_ptr, &a_size) || !a_ptr) {
751: EMSG("No EC_PARAMS attribute found in public key");
752: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
753: }
754:
755: tee_size = ec_params2tee_keysize(a_ptr, a_size);
756: if (!tee_size)
757: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
758:
759: res = TEE_AllocateTransientObject(TEE_TYPE_ED25519_KEYPAIR, tee_size,
760: &tee_obj);
761: if (res) {
762: EMSG("Transient alloc failed with %#"PRIx32, res);
763: return tee2pkcs_error(res);
764: }
765:
766: res = TEE_RestrictObjectUsage1(tee_obj, TEE_USAGE_EXTRACTABLE);
767: if (res) {
768: rc = tee2pkcs_error(res);
769: goto out;
770: }
771:
772: res = TEE_GenerateKey(tee_obj, tee_size, NULL, 0);
773: if (res) {
774: rc = tee2pkcs_error(res);
775: goto out;
776: }
777:
778:
779: rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
780: if (rc)
781: goto out;
782:
783: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE,
784: tee_obj, TEE_ATTR_ED25519_PRIVATE_VALUE);
785: if (rc)
786: goto out;
787:
788: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EC_POINT,
789: tee_obj, TEE_ATTR_ED25519_PUBLIC_VALUE);
790: if (rc)
791: goto out;
792:
793: rc = tee2pkcs_add_attribute(pub_head, PKCS11_CKA_EC_POINT,
794: tee_obj, TEE_ATTR_ED25519_PUBLIC_VALUE);
795:
796: out:
797: if (tee_obj != TEE_HANDLE_NULL)
798: TEE_CloseObject(tee_obj);
799:
800: return rc;
801: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "generate_eddsa_keys",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"generate_eddsa_keys",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (generate_eddsa_keys)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "generate_eddsa_keys",
    "tainted_vars": [
      "proc_params",
      "pub_head",
      "priv_head",
      "a_ptr",
      "a_size",
      "tee_size",
      "tee_obj"
    ],
    "propagation": [
      {
        "lhs": "a_ptr,a_size",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:749-753"
      },
      {
        "lhs": "tee_size",
        "rhs": "ec_params2tee_keysize(a_ptr, a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:755-757"
      },
      {
        "lhs": "tee_obj",
        "rhs": "TEE_AllocateTransientObject(TEE_TYPE_ED25519_KEYPAIR, tee_size, &tee_obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:759-761"
      },
      {
        "lhs": "tee_obj (key material)",
        "rhs": "TEE_GenerateKey(tee_obj, tee_size, NULL, 0)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:772-774"
      },
      {
        "lhs": "priv_head (attributes)",
        "rhs": "tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE, tee_obj, TEE_ATTR_ED25519_PRIVATE_VALUE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:783-786"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:736-738",
        "evidence": "checks for null proc_params or *pub_head or *priv_head"
      },
      {
        "kind": "sanity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:739-747",
        "evidence": "remove_empty_attribute checks and error on unexpected attributes"
      },
      {
        "kind": "value_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:755-757",
        "evidence": "tee_size computed and validated (non-zero) before allocation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 513,
      "function": "generate_eddsa_keys",
      "rule": "other",
      "why": "caller-provided proc_params (derived from REE serialargs) is passed into callee; alias of REE-origin attribute header into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_eddsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 513,
      "function": "generate_eddsa_keys",
      "rule": "other",
      "why": "address of pub_head (caller stack/TA-managed pointer) passed into callee; binding of TA-private pointer into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_eddsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 513,
      "function": "generate_eddsa_keys",
      "rule": "other",
      "why": "address of priv_head (caller stack/TA-managed pointer) passed into callee; binding of TA-private pointer into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = generate_eddsa_keys(proc_params, &pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 783,
      "function": "generate_eddsa_keys",
      "rule": "other",
      "why": "private key material from TEE object is added into priv_head attributes (sensitive key material copied into TA structure)",
      "sink_function": "tee2pkcs_add_attribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:key",
          "size_triplet:copy_len=unknown,src_sz=tee_size,dst_sz=(*priv_head)->attrs_size"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE, tee_obj, TEE_ATTR_ED25519_PRIVATE_VALUE);"
    }
  ]
}

関数: remove_empty_attribute
プロンプト 中間 (remove_empty_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “remove_empty_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_eddsa_keys at lines [739, 740, 741, 742]:
-- Call #1 at line 739 --
737: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
738:
739: >>> if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740: remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741: remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
-- Call #2 at line 740 --
738:
739: if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740: >>> remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741: remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
-- Call #3 at line 741 --
739:     	if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||
740:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
743:     		EMSG("Unexpected attribute(s) found");
-- Call #4 at line 742 --
740:     	    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||
741:     	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||
742: >>> 	    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {
743:     		EMSG("Unexpected attribute(s) found");
744:     		trace_attributes("public-key", *pub_head);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

98: enum pkcs11_rc remove_empty_attribute(struct obj_attrs **head,
99: uint32_t attribute)
100: {
101: return _remove_attribute(head, attribute, true );
102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"remove_empty_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (remove_empty_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "remove_empty_attribute",
    "tainted_vars": [
      "head",
      "attribute"
    ],
    "propagation": [
      {
        "lhs": "return",
        "rhs": "_remove_attribute(head, attribute, true)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:101-102"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 739,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of pub_head (TA-managed attribute list) passed into helper from generate_eddsa_keys; binding of caller pointer into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (remove_empty_attribute(pub_head, PKCS11_CKA_EC_POINT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 740,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (TA-managed attribute list) passed into helper from generate_eddsa_keys; binding of caller pointer into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_VALUE) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 741,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (TA-managed attribute list) passed into helper from generate_eddsa_keys; binding of caller pointer into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_EC_POINT) ||"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 742,
      "function": "remove_empty_attribute",
      "rule": "other",
      "why": "alias of priv_head (TA-managed attribute list) passed into helper from generate_eddsa_keys; binding of caller pointer into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "    remove_empty_attribute(priv_head, PKCS11_CKA_EC_PARAMS)) {"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from remove_empty_attribute at lines [101, 200]:
-- Call #1 at line 101 --
99: uint32_t attribute)
100: { 101: >>> return _remove_attribute(head, attribute, true ); 102: }
103:
-- Call #2 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "contents at cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      },
      {
        "lhs": "memory region after cur",
        "rhs": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off)) shifts trailing attrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72",
        "evidence": "loop condition cur < end limits parsing of attrs"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 101,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from remove_empty_attribute into _remove_attribute; binding of caller pointer into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return _remove_attribute(head, attribute, true );"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed at call-site with empty==false; binding of caller pointer into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "in-place TEE_MemMove shifts remaining attributes using sizes derived from parsed pkcs11_ref and h->attrs_size; malformed sizes could cause incorrect memory shifts",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copy of len bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75-76"
      },
      {
        "lhs": "dst",
        "rhs": "src (overlapping copy of end - (cur + next_off) bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      },
      {
        "lhs": "attr",
        "rhs": "attr_ptr (copy of size bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_bounds",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:72",
        "evidence": "parsing loop uses cur < end to limit reads before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from parsed buffer into local pkcs11_ref; source buffer provenance unclear (could be REE-origin), sizes derived from parsed data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "In-place shift of trailing attributes using length computed from parsed headers; malformed pkcs11_ref.size or attrs_size may cause incorrect move",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value into provided attr buffer from attr_ptr; origin and size of attr_ptr may be TA or REE-controlled (uncertain)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur into local header where cur..end bounds are derived from h->attrs_size (possibly attacker-controlled); loop only checks cur<end but does not ensure end - cur >= sizeof(pkcs11_ref), enabling out-of-bounds read.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Performs in-place shift using length end - (cur + next_off) computed from pkcs11_ref.size (untrusted) without verifying cur+next_off <= end, enabling out-of-bounds read/write or length wrap and memory corruption.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided attribute buffer (params → serialargs → templates → obj_attrs->attrs blob)",
      "propagation_path": [
        "params (REE-origin) → serialargs / templates @ processing.c:415-431",
        "templates → pub_head/priv_head (TA structures) @ processing.c:448-472",
        "pub_head/priv_head -> *head passed into generate_eddsa_keys -> remove_empty_attribute -> _remove_attribute @ processing_ec.c:739 / attributes.c:61",
        "parsing loop reads pkcs11_ref from cur via TEE_MemMove @ attributes.c:75",
        "next_off derived from pkcs11_ref.size used in TEE_MemMove shift @ attributes.c:84"
      ],
      "sink": "TEE_MemMove calls at attributes.c:75 and attributes.c:84 that read/shift memory using unvalidated sizes"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted attribute list via REE-side params leading to obj_attrs with manipulated attrs_size or pkcs11_ref.size",
        "TA code reaches remove_empty_attribute/_remove_attribute (e.g., generate_eddsa_keys path)"
      ],
      "attack_scenario": "Maliciously crafted attrs blob with truncated or oversized pkcs11_ref.size causes TEE_MemMove at line 75 to read beyond available buffer or at line 84 to move overlapping memory with incorrect length, leading to memory disclosure, corruption, or crash in the TA.",
      "impact": "Memory-safety violation (out-of-bounds read/write) enabling potential crash, information disclosure of TA memory, or corruption leading to further compromise of TA state."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes.c:72-76",
        "recommendation": "Before copying header, ensure (end - cur) >= sizeof(pkcs11_attribute_head); validate pkcs11_ref.size does not cause next_off to exceed remaining bytes."
      },
      {
        "type": "range_check",
        "location": "attributes.c:76-84",
        "recommendation": "Verify computed next_off is within [sizeof(pkcs11_ref), h->attrs_size] and that cur + next_off <= end before using it to compute move length."
      },
      {
        "type": "mem_access_check",
        "location": "attributes.c:84",
        "recommendation": "Use safe move semantics with explicit validated lengths and handle malformed inputs by returning an error instead of proceeding."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Copy lengths derived from parsed pkcs11_ref.size and h->attrs_size (both influenced by input)",
        "No explicit check that (end - cur) >= sizeof(pkcs11_ref) before first copy",
        "No check that cur+next_off <= end before shifting"
      ],
      "negative_indicators": [
        "Loop uses cur < end which limits reads in common cases",
        "Higher-level parsing may construct h->attrs_size from trusted sources in some flows (uncertain)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issues take precedence: both TEE_MemMove invocations use lengths and offsets derived from unvalidated parsed fields (attrs_size, pkcs11_ref.size) with insufficient checks, creating clear out-of-bounds read/write opportunities.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from cur without ensuring remaining bytes >= sizeof(header)."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Shifts remaining attributes using next_off derived from unvalidated pkcs11_ref.size, enabling OOB move."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bounds",
      "location": "attributes.c:72",
      "evidence": "for (; cur < end; cur += next_off) limits parsing to h->attrs_size"
    },
    {
      "type": "type_validation",
      "location": "processing.c:412-413",
      "evidence": "ptypes and out->memref.size checked in entry_generate_key_pair"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially",
      "evidence": "head originates from TA-created obj_attrs but attrs_size may be derived from REE-supplied templates (processing.c:448-472)"
    }
  ],
  "residual_risks": [
    "line 75/84 memory-safety finding suppresses information-disclosure classification here; if memory corruption allowed, secrets in TA could be exposed",
    "upstream templates derived from REE may propagate untrusted sizes into TA-managed structures"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of parsed sizes in copy lengths at the sink lines",
      "Absence of explicit length checks guarding those TEE_MemMove calls"
    ],
    "negative_indicators": [
      "Parsing loop boundary cur<end provides some protection when attrs_size is sane",
      "Higher-level checks earlier in flow may reduce some malformed inputs, but not sufficient"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Both sinks perform memory copies with lengths/offsets computed from parsed attribute metadata without adequate validation; this is a reproducible memory-safety vulnerability allowing OOB read/write and potential disclosure or corruption.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size - next_off"
        ]
      },
      "why": "In-place attribute shifting uses unvalidated next_off derived from pkcs11_ref.size; malformed sizes can cause incorrect memory moves.",
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}
フロー #9: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> modify_attributes_list -> set_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuemodify_attributes_listset_attribute_remove_attributeTEE_MemMove

実行時間: 178.17秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125/CWE-787

深刻度: HIGH

テイントフロー:

ソース: Caller-provided serialized attributes buffer (params->memref.buffer) parsed into template/head then propagated into obj_attrs->attrs memory

シンク: TEE_MemMove reads/writes using lengths derived from untrusted parsed sizes

判定理由: Memory-safety issues take precedence: both lines perform reads/writes sized by untrusted parsed fields without sufficient validation, enabling out-of-bounds read or write; thus they are classified as vulnerable.

信頼度: MEDIUM

LLM対話履歴 (12 メッセージ)

関数: entry_set_attribute_value
プロンプト 中間 (entry_set_attribute_value)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_set_attribute_value” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [307]:
-- Call #1 at line 307 --
305: break;
306: case PKCS11_CMD_SET_ATTRIBUTE_VALUE:
307: >>> rc = entry_set_attribute_value(client, ptypes, params);
308: break;
309: case PKCS11_CMD_COPY_OBJECT:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

971: enum pkcs11_rc entry_set_attribute_value(struct pkcs11_client *client,
972: uint32_t ptypes, TEE_Param *params)
973: { 974: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 975: TEE_PARAM_TYPE_NONE, 976: TEE_PARAM_TYPE_NONE, 977: TEE_PARAM_TYPE_NONE); 978: TEE_Param *ctrl = params; 979: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 980: struct serialargs ctrlargs = { }; 981: struct pkcs11_session *session = NULL; 982: struct pkcs11_object_head *template = NULL; 983: size_t template_size = 0; 984: struct pkcs11_object *obj = NULL; 985: struct obj_attrs *head = NULL; 986: uint32_t object_handle = 0; 987: enum processing_func function = PKCS11_FUNCTION_MODIFY; 988: 989: if (!client || ptypes != exp_pt) 990: return PKCS11_CKR_ARGUMENTS_BAD; 991: 992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 993: 994: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 995: if (rc) 996: return rc; 997: 998: rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)); 999: if (rc) 1000: return rc; 1001: 1002: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 1003: if (rc) 1004: return rc; 1005: 1006: if (serialargs_remaining_bytes(&ctrlargs)) { 1007: rc = PKCS11_CKR_ARGUMENTS_BAD; 1008: goto out; 1009: } 1010: 1011: obj = pkcs11_handle2object(object_handle, session); 1012: if (!obj) { 1013: rc = PKCS11_CKR_OBJECT_HANDLE_INVALID; 1014: goto out; 1015: } 1016: 1017: 1018: if (object_is_token(obj->attributes) && 1019: !pkcs11_session_is_read_write(session)) { 1020: DMSG("Can't modify persistent object in a RO session"); 1021: rc = PKCS11_CKR_SESSION_READ_ONLY; 1022: goto out; 1023: } 1024: 1025: 1028: rc = check_access_attrs_against_token(session, obj->attributes); 1029: if (rc) { 1030: rc = PKCS11_CKR_USER_NOT_LOGGED_IN; 1031: goto out; 1032: } 1033: 1034: 1035: if (!object_is_modifiable(obj->attributes)) { 1036: rc = PKCS11_CKR_ACTION_PROHIBITED; 1037: goto out; 1038: } 1039: 1040: template_size = sizeof(*template) + template->attrs_size; 1041: 1042: 1047: rc = create_attributes_from_template(&head, template, template_size, 1048: NULL, function, 1049: PKCS11_CKM_UNDEFINED_ID, 1050: PKCS11_CKO_UNDEFINED_ID); 1051: if (rc) 1052: goto out; 1053: 1054: 1055: rc = check_attrs_against_modification(session, head, obj, function); 1056: if (rc) 1057: goto out; 1058: 1059: 1063: rc = modify_attributes_list(&obj->attributes, head); 1064: if (rc) 1065: goto out; 1066: 1067: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 1068: rc = update_persistent_object_attributes(obj); 1069: if (rc) 1070: goto out; 1071: } 1072: 1073: DMSG("PKCS11 session %"PRIu32": set attributes %#"PRIx32, 1074: session->handle, object_handle); 1075: 1076: out: 1077: TEE_Free(head); 1078: TEE_Free(template); 1079: return rc; 1080: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_set_attribute_value", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_set_attribute_value", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_set_attribute_value)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_set_attribute_value",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "template",
      "template->attrs_size",
      "head"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:978"
      },
      {
        "lhs": "ctrl->memref.buffer, ctrl->memref.size",
        "rhs": "caller-provided params memref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:992"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:994-996"
      },
      {
        "lhs": "object_handle",
        "rhs": "serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:998-1000"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs, &template) (derived from ctrl memref buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004"
      },
      {
        "lhs": "template_size",
        "rhs": "sizeof(*template) + template->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1040"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:974-977,989-991",
        "evidence": "ptypes compared to expected exp_pt and function returns PKCS11_CKR_ARGUMENTS_BAD if mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1006-1009",
        "evidence": "serialargs_remaining_bytes check causing PKCS11_CKR_ARGUMENTS_BAD"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "rule": "other",
      "why": "alias of caller-provided client pointer passed into callee; origin of client is tainted/unknown from upstream invocation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "rule": "other",
      "why": "alias of caller-provided params (memref buffer) passed into callee; params->memref.buffer is REE-origin shared memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "rule": "weak_input_validation",
      "why": "serialargs_init/alloc consume caller-provided memref buffer and template->attrs_size (from REE) is used to compute template_size without strong validation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    }
  ]
}

関数: modify_attributes_list
プロンプト 中間 (modify_attributes_list)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “modify_attributes_list” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1063, 1215]:
-- Call #1 at line 1063 --
1061: * can now be used to set/modify the object attributes.
1062: */
1063: >>> rc = modify_attributes_list(&obj->attributes, head);
1064: if (rc)
1065: goto out;
-- Call #2 at line 1215 --
1213: * given by the callee
1214: */
1215: >>> rc = modify_attributes_list(&head_new, head);
1216: if (rc)
1217: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

207: enum pkcs11_rc modify_attributes_list(struct obj_attrs **dst,
208: struct obj_attrs *head)
209: { 210: char *cur = (char *)head + sizeof(struct obj_attrs); 211: char *end = cur + head->attrs_size; 212: size_t len = 0; 213: enum pkcs11_rc rc = PKCS11_CKR_OK; 214: 215: for (; cur < end; cur += len) { 216: struct pkcs11_attribute_head *cli_ref = (void *)cur; 217: 218: struct pkcs11_attribute_head cli_head = { }; 219: 220: TEE_MemMove(&cli_head, cur, sizeof(cli_head)); 221: len = sizeof(cli_head) + cli_head.size; 222: 223: rc = set_attribute(dst, cli_head.id, 224: cli_head.size ? cli_ref->data : NULL, 225: cli_head.size); 226: if (rc) 227: return rc; 228: } 229: 230: return PKCS11_CKR_OK; 231: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "modify_attributes_list", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"modify_attributes_list", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (modify_attributes_list)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "modify_attributes_list",
    "tainted_vars": [
      "dst",
      "head",
      "cur",
      "end",
      "len",
      "cli_ref",
      "cli_head",
      "cli_head.size",
      "cli_ref->data"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:210"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:211"
      },
      {
        "lhs": "cli_head",
        "rhs": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)) (data copied from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(cli_head) + cli_head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:221"
      },
      {
        "lhs": "set_attribute(dst, cli_head.id, cli_ref->data, cli_head.size)",
        "rhs": "cli_ref->data (pointer into head region) and cli_head.size (parsed length)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:223-225"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1063,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "alias of TEE-private object attribute list pointer passed as dst (&obj->attributes) at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&obj->attributes, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1063,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "alias of head (attributes list) passed into callee; head originates from create_attributes_from_template and is treated as TEE-private here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&obj->attributes, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1215,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "alias of TEE-private destination pointer (&head_new) passed to callee at second call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&head_new, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1215,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "alias of head passed into callee at second call-site; head remains TEE-private in this context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&head_new, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "rule": "weak_input_validation",
      "why": "parses lengths from head->attrs_size and cli_head.size to bound loop and compute len without strong validation of attrs_size/cli_head.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;"
    }
  ]
}

関数: set_attribute
プロンプト 中間 (set_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from modify_attributes_list at lines [223]:
-- Call #1 at line 223 --
221: len = sizeof(cli_head) + cli_head.size;
222:
223: >>> rc = set_attribute(dst, cli_head.id,
224: cli_head.size ? cli_ref->data : NULL,
225: cli_head.size);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

195: enum pkcs11_rc set_attribute(struct obj_attrs **head, uint32_t attribute,
196: void *data, size_t size)
197: { 198: enum pkcs11_rc rc = PKCS11_CKR_OK; 199: 200: rc = _remove_attribute(head, attribute, false); 201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 202: return rc; 203: 204: return add_attribute(head, attribute, data, size); 205: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "_remove_attribute(head, attribute, false)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:200-202"
      },
      {
        "lhs": "return value",
        "rhs": "add_attribute(head, attribute, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:204"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 223,
      "function": "set_attribute",
      "rule": "other",
      "why": "caller-provided head pointer (destination attribute list) is passed through to add_attribute; origin is TEE-private alias of earlier head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 223,
      "function": "set_attribute",
      "rule": "weak_input_validation",
      "why": "data pointer and size (originating from parsed template) are forwarded to add_attribute without additional validation of size or content",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [200]:
-- Call #1 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "pkcs11_ref.id"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (parsed from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70-72",
        "evidence": "loop condition cur < end uses h->attrs_size to bound iteration"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "caller-provided head pointer (destination attribute list) is passed into _remove_attribute; origin is alias of caller's obj attribute list",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "parses pkcs11_ref.size from in-memory data and uses it to compute next_off and loop bounds without strong validation against h->attrs_size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=h->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "in-place TEE_MemMove moves memory region (cur + next_off) to cur using length derived from end - (cur + next_off); if sizes miscomputed this can corrupt attribute list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copy source)",
        "site": "multiple call-sites (attributes.c:75,84,119,187,220,265,298,344,352,353,435,447)"
      },
      {
        "lhs": "memory at dst",
        "rhs": "memory at src, length n",
        "site": "multiple call-sites (attributes.c:75,84,119,187,220,265,298,344,352,353,435,447)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies header at cur into local pkcs11_ref using size derived from in-memory data; parsed size later used to compute offsets without stronger validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "in-place memmove shifts trailing bytes using length computed from end and next_off; miscomputed next_off can corrupt list (overlap/misbound copy)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies attribute data from attr_ptr into attr buffer using size parameter; origin and bounds of attr/attr_ptr depend on upstream parsing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies cli_head from cur and then uses cli_head.size to compute len; size derived from memory without extra validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix into prefix2 using prefix_len+1; if prefix_len derived from unvalidated source this may overflow prefix2",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "loads pkcs11_ref from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes; pkcs11_ref.size is from parsed data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=end - cur,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies 'head' structure from ref into local head using sizeof(head); origin of ref may be external but is used unchecked",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix into pre using strlen(prefix) without showing allocation of pre here; destination origin/size unclear (potential overflow)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": " _remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies header from cur into local pkcs11_ref using sizeof(header) where cur/end bounds are driven by h->attrs_size parsed earlier; insufficient validation can cause out-of-bounds read or parsing of crafted size.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "In-place memmove shifts bytes by next_off computed from parsed pkcs11_ref.size; if next_off is larger than remaining buffer or malformed, length calculation end - (cur + next_off) can underflow or corrupt memory leading to overflow/invalid write.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125/CWE-787",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided serialized attributes buffer (params->memref.buffer) parsed into template/head then propagated into obj_attrs->attrs memory",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_alloc_get_attributes -> template/head @ object.c:1002",
        "head->attrs_size used to set end and drive loop bounds @ attributes.c:70-71",
        "cur (within head) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:75",
        "pkcs11_ref.size -> next_off -> TEE_MemMove(cur, cur + next_off, end - (cur + next_off)) @ attributes.c:76,84"
      ],
      "sink": "TEE_MemMove reads/writes using lengths derived from untrusted parsed sizes"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or crafts the serialized attributes buffer supplied in params memref",
        "TA does not further validate attrs_size or individual attribute sizes beyond current checks"
      ],
      "attack_scenario": "Maliciously crafted attrs_size or attribute size causes loop parsing to accept a header but with pkcs11_ref.size that causes subsequent memmove to copy out-of-bounds or with an underflowed length, leading to memory corruption or information disclosure.",
      "impact": "Memory corruption leading to crash or arbitrary write/reading of sensitive TA memory; potential escalation to data leakage or code execution depending on layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "modify_attributes_list/_remove_attribute:70-76",
        "recommendation": "Validate that (end - cur) >= sizeof(header) before reading header and that pkcs11_ref.size does not cause next_off to exceed (end - cur) and is within reasonable limits."
      },
      {
        "type": "range_check",
        "location": "modify_attributes_list/_remove_attribute:76-84",
        "recommendation": "Check next_off and end - (cur + next_off) for underflow/overflow before calling TEE_MemMove; reject malformed inputs."
      },
      {
        "type": "type_validation",
        "location": "entry_set_attribute_value:1002-1004",
        "recommendation": "Validate template->attrs_size and individual attribute sizes when parsing serialargs_alloc_get_attributes to ensure internal consistency."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of parsed sizes (h->attrs_size, pkcs11_ref.size) to compute read/write lengths",
        "No explicit checks that (end - cur) >= sizeof(header) before header read",
        "In-place memmove uses end - (cur + next_off) which can underflow if next_off is malformed"
      ],
      "negative_indicators": [
        "Loop condition cur < end provides some bounding but does not ensure header or next_off fit",
        "Some earlier checks (serialargs_remaining_bytes) may catch certain malformed inputs depending on alloc implementation"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety issues take precedence: both lines perform reads/writes sized by untrusted parsed fields without sufficient validation, enabling out-of-bounds read or write; thus they are classified as vulnerable.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header read from cur using sizeof(header) without ensuring remaining buffer >= sizeof(header)."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "other",
        "why": "In-place memmove with length computed from parsed next_off can underflow/overflow and corrupt memory."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "modify_attributes_list/_remove_attribute:70-72",
      "evidence": "loop condition cur < end uses h->attrs_size to bound iteration"
    }
  ],
  "argument_safety": [
    {
      "arg": "head (obj_attrs *)",
      "why_safe": "Allocated/managed within TA after serialargs_alloc_get_attributes, not directly REE-visible",
      "evidence": "object.c:1002-1004"
    }
  ],
  "residual_risks": [
    "Line 75: even though memory-safety is primary, this could also lead to information leakage if out-of-bounds read exposes sensitive data.",
    "Line 84: memory corruption could enable downstream disclosure or control-flow hijack."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Concrete arithmetic next_off = sizeof(header) + parsed_size used directly",
      "TEE_MemMove invoked with lengths derived from parsed data"
    ],
    "negative_indicators": [
      "Some upstream checks (serialargs_remaining_bytes) may limit certain malformed inputs depending on implementation details"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Both target memmove calls use lengths derived from untrusted parsed fields without explicit sufficient validation; memory-safety vulnerabilities are the primary concern and are reported.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Parses cli_head from cur and uses cli_head.size to compute len without strong validation of cli_head.size relative to remaining buffer.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_alloc_get_attributes consumes caller-provided buffer to build template whose attrs_size is later trusted; malformed attrs_size can propagate.",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    }
  ]
}
フロー #10: TA_InvokeCommandEntryPoint -> entry_copy_object -> modify_attributes_list -> set_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectmodify_attributes_listset_attribute_remove_attributeTEE_MemMove

実行時間: 181.22秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided serialized attributes (params->ctrl->memref.buffer) originating from REE

シンク: TEE_MemMove operations that copy based on untrusted header.size and buffer lengths

判定理由: Both target memmoves consume lengths derived from untrusted parsed headers without sufficient per-header bounds checks, producing clear out-of-bounds memory-safety risks.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: entry_copy_object
プロンプト 中間 (entry_copy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_copy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [310]:
-- Call #1 at line 310 --
308: break;
309: case PKCS11_CMD_COPY_OBJECT:
310: >>> rc = entry_copy_object(client, ptypes, params);
311: break;
312: case PKCS11_CMD_SEED_RANDOM:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

1082: enum pkcs11_rc entry_copy_object(struct pkcs11_client *client, uint32_t ptypes,
1083: TEE_Param *params)
1084: { 1085: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1086: TEE_PARAM_TYPE_NONE, 1087: TEE_PARAM_TYPE_MEMREF_OUTPUT, 1088: TEE_PARAM_TYPE_NONE); 1089: TEE_Param *ctrl = params; 1090: TEE_Param *out = params + 2; 1091: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 1092: struct serialargs ctrlargs = { }; 1093: struct pkcs11_session *session = NULL; 1094: struct pkcs11_object_head *template = NULL; 1095: struct obj_attrs *head = NULL; 1096: struct obj_attrs *head_new = NULL; 1097: size_t template_size = 0; 1098: struct pkcs11_object *obj = NULL; 1099: uint32_t object_handle = 0; 1100: uint32_t obj_handle = 0; 1101: enum processing_func function = PKCS11_FUNCTION_COPY; 1102: enum pkcs11_class_id class = PKCS11_CKO_UNDEFINED_ID; 1103: 1104: if (!client || ptypes != exp_pt || 1105: out->memref.size != sizeof(obj_handle)) 1106: return PKCS11_CKR_ARGUMENTS_BAD; 1107: 1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1109: 1110: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1111: if (rc) 1112: return rc; 1113: 1114: rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)); 1115: if (rc) 1116: return rc; 1117: 1118: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 1119: if (rc) 1120: return rc; 1121: 1122: if (serialargs_remaining_bytes(&ctrlargs)) { 1123: rc = PKCS11_CKR_ARGUMENTS_BAD; 1124: goto out; 1125: } 1126: 1127: obj = pkcs11_handle2object(object_handle, session); 1128: if (!obj) { 1129: rc = PKCS11_CKR_OBJECT_HANDLE_INVALID; 1130: goto out; 1131: } 1132: 1133: 1134: if (object_is_token(obj->attributes) && 1135: !pkcs11_session_is_read_write(session)) { 1136: DMSG("Can't modify persistent object in a RO session"); 1137: rc = PKCS11_CKR_SESSION_READ_ONLY; 1138: goto out; 1139: } 1140: 1141: 1144: rc = check_access_attrs_against_token(session, obj->attributes); 1145: if (rc) { 1146: rc = PKCS11_CKR_USER_NOT_LOGGED_IN; 1147: goto out; 1148: } 1149: 1150: 1151: if (!object_is_copyable(obj->attributes)) { 1152: rc = PKCS11_CKR_ACTION_PROHIBITED; 1153: goto out; 1154: } 1155: 1156: template_size = sizeof(*template) + template->attrs_size; 1157: 1158: 1163: rc = create_attributes_from_template(&head, template, template_size, 1164: NULL, function, 1165: PKCS11_CKM_UNDEFINED_ID, 1166: PKCS11_CKO_UNDEFINED_ID); 1167: if (rc) 1168: goto out; 1169: 1170: 1171: rc = check_attrs_against_modification(session, head, obj, function); 1172: if (rc) 1173: goto out; 1174: 1175: class = get_class(obj->attributes); 1176: 1177: if (class == PKCS11_CKO_SECRET_KEY || 1178: class == PKCS11_CKO_PRIVATE_KEY) { 1179: 1185: uint8_t bbool = 0; 1186: uint32_t size = sizeof(bbool); 1187: 1188: rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size); 1189: if (!rc && !bbool) { 1190: rc = add_attribute(&head, PKCS11_CKA_NEVER_EXTRACTABLE, 1191: &bbool, sizeof(uint8_t)); 1192: if (rc) 1193: goto out; 1194: } 1195: rc = PKCS11_CKR_OK; 1196: } 1197: 1198: 1202: template_size = sizeof(*obj->attributes) + obj->attributes->attrs_size; 1203: head_new = TEE_Malloc(template_size, TEE_MALLOC_FILL_ZERO); 1204: if (!head_new) { 1205: rc = PKCS11_CKR_DEVICE_MEMORY; 1206: goto out; 1207: } 1208: 1209: TEE_MemMove(head_new, obj->attributes, template_size); 1210: 1211: 1215: rc = modify_attributes_list(&head_new, head); 1216: if (rc) 1217: goto out; 1218: 1219: 1224: rc = create_object(session, head_new, &obj_handle); 1225: if (rc) 1226: goto out; 1227: 1228: 1235: head_new = NULL; 1236: 1237: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle)); 1238: out->memref.size = sizeof(obj_handle); 1239: 1240: DMSG("PKCS11 session %"PRIu32": copy object %#"PRIx32, 1241: session->handle, obj_handle); 1242: 1243: out: 1244: TEE_Free(head_new); 1245: TEE_Free(head); 1246: TEE_Free(template); 1247: return rc; 1248: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_copy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_copy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_copy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_copy_object",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "session",
      "template",
      "head",
      "head_new",
      "obj",
      "obj->attributes",
      "obj_handle",
      "object_handle"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params (caller-provided params)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1089-1090"
      },
      {
        "lhs": "out",
        "rhs": "params + 2 (caller-provided out memref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1090"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session) reading ctrl->memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1111"
      },
      {
        "lhs": "object_handle",
        "rhs": "serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)) reading ctrl buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1114-1116"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs, &template) reading ctrl buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118-1120"
      },
      {
        "lhs": "head_new",
        "rhs": "TEE_Malloc(...) then TEE_MemMove(head_new, obj->attributes, template_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1202-1209"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&obj_handle (local obj_handle) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237-1238"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1104-1106",
        "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1122-1125",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) -> error if leftover bytes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 310,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'client' is alias of caller's client whose provenance traces to tee_session; origin region unclear",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_client *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_copy_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 310,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'params' aliases caller-provided TEE_Param array (shared/REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_copy_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "Copies object attributes from TA-private obj->attributes into freshly allocated TA-private head_new via TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=template_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "Copies obj_handle (local, non-sensitive handle) into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: modify_attributes_list
プロンプト 中間 (modify_attributes_list)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “modify_attributes_list” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1215]:
-- Call #1 at line 1215 --
1213: * given by the callee
1214: */
1215: >>> rc = modify_attributes_list(&head_new, head);
1216: if (rc)
1217: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

207: enum pkcs11_rc modify_attributes_list(struct obj_attrs **dst,
208: struct obj_attrs *head)
209: { 210: char *cur = (char *)head + sizeof(struct obj_attrs); 211: char *end = cur + head->attrs_size; 212: size_t len = 0; 213: enum pkcs11_rc rc = PKCS11_CKR_OK; 214: 215: for (; cur < end; cur += len) { 216: struct pkcs11_attribute_head *cli_ref = (void *)cur; 217: 218: struct pkcs11_attribute_head cli_head = { }; 219: 220: TEE_MemMove(&cli_head, cur, sizeof(cli_head)); 221: len = sizeof(cli_head) + cli_head.size; 222: 223: rc = set_attribute(dst, cli_head.id, 224: cli_head.size ? cli_ref->data : NULL, 225: cli_head.size); 226: if (rc) 227: return rc; 228: } 229: 230: return PKCS11_CKR_OK; 231: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "modify_attributes_list", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"modify_attributes_list", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (modify_attributes_list)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "modify_attributes_list",
    "tainted_vars": [
      "dst",
      "head",
      "cur",
      "end",
      "len",
      "cli_ref",
      "cli_head"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:210"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:211"
      },
      {
        "lhs": "cli_ref",
        "rhs": "(void *)cur (pointer into head's attribute stream)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:216"
      },
      {
        "lhs": "cli_head",
        "rhs": "contents copied from cur via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(cli_head) + cli_head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:221"
      },
      {
        "lhs": "dst (passed into set_attribute)",
        "rhs": "dst parameter (caller-provided pointer to destination attribute list)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:223-225"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_bound_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:215",
        "evidence": "for (; cur < end; cur += len) uses end from head->attrs_size as loop bound"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1215,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'dst' aliases &head_new (TA-allocated) passed from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&head_new, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1215,
      "function": "modify_attributes_list",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'head' aliases 'head' (attributes built from template ultimately influenced by REE input)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = modify_attributes_list(&head_new, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "rule": "weak_input_validation",
      "why": "Copies header from cur via TEE_MemMove without verifying remaining bytes; header.size influences subsequent parsing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end-cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 221,
      "function": "modify_attributes_list",
      "rule": "weak_input_validation",
      "why": "Uses cli_head.size (from unvalidated header) to compute len and advance loop, enabling OOB or infinite loop if header is malicious",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "len = sizeof(cli_head) + cli_head.size;"
    }
  ]
}

関数: set_attribute
プロンプト 中間 (set_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from modify_attributes_list at lines [223]:
-- Call #1 at line 223 --
221: len = sizeof(cli_head) + cli_head.size;
222:
223: >>> rc = set_attribute(dst, cli_head.id,
224: cli_head.size ? cli_ref->data : NULL,
225: cli_head.size);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

195: enum pkcs11_rc set_attribute(struct obj_attrs **head, uint32_t attribute,
196: void *data, size_t size)
197: { 198: enum pkcs11_rc rc = PKCS11_CKR_OK; 199: 200: rc = _remove_attribute(head, attribute, false); 201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 202: return rc; 203: 204: return add_attribute(head, attribute, data, size); 205: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size"
    ],
    "propagation": [
      {
        "lhs": "head",
        "rhs": "caller-provided dst (&head_new) at modify_attributes_list:223",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:223"
      },
      {
        "lhs": "data",
        "rhs": "cli_ref->data (pointer into head attribute stream)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:224"
      },
      {
        "lhs": "size",
        "rhs": "cli_head.size (parsed from untrusted header)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:221-225"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 223,
      "function": "set_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller's &head_new (TA-allocated destination)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = set_attribute(dst, cli_head.id, cli_head.size ? cli_ref->data : NULL, cli_head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 223,
      "function": "set_attribute",
      "rule": "other",
      "why": "Call-site binding: 'data' parameter aliases cli_ref->data which points into the parsed head buffer (origin influenced by REE)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=cli_head.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = set_attribute(dst, cli_head.id, cli_head.size ? cli_ref->data : NULL, cli_head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 223,
      "function": "set_attribute",
      "rule": "weak_input_validation",
      "why": "Size argument derived from unvalidated cli_head.size and used to add attribute; may lead to OOB or logic errors if malicious",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = set_attribute(dst, cli_head.id, cli_head.size ? cli_ref->data : NULL, cli_head.size);"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [200]:
-- Call #1 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "pkcs11_ref.id"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "contents copied from cur via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:73-76"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      },
      {
        "lhs": "h->attrs_size / end",
        "rhs": "updated after removal (h->attrs_size -= next_off)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:86-88"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter passed from set_attribute aliases caller's head (destination list) whose provenance traces to caller buffers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Copies attribute header from cur without verifying there are sizeof(pkcs11_ref) bytes remaining; header.size is then trusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (from unvalidated header) to compute next_off and to memmove remaining bytes, enabling OOB reads/writes if header is malicious",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 72,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Loop bound uses h->attrs_size derived from head; if attrs_size is corrupted by input, loop may OOB or mis-parse entries",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=h->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "for (; cur < end; cur += next_off) {"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "dest",
        "rhs": "src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      },
      {
        "lhs": "dest",
        "rhs": "src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination '&pkcs11_ref' is a local TA stack object (TA-private) at call site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from 'cur' without first confirming sizeof(header) bytes remain; header.size then influences parsing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: dest 'cur' and src 'cur + next_off' are pointers into the same attributes buffer (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Moves remaining bytes based on next_off computed from untrusted header size; may underflow/overflow if header is malicious",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=end - (cur + next_off),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: 'attr' destination pointer provided by caller (TA-private target for attribute data)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (which may point into parsed/unchecked input) into attr without validating bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from 'cur' into local header without verifying that end - cur >= sizeof(pkcs11_ref); header.size then used to drive parsing.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Moves remaining bytes based on next_off computed from untrusted header.size; no validation that next_off is within bounds, allowing OOB read/write.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided serialized attributes (params->ctrl->memref.buffer) originating from REE",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_copy_object @ entry.c:310",
        "entry_copy_object builds template/head from ctrl buffer -> modify_attributes_list @ object.c:1215",
        "modify_attributes_list iterates attribute stream and calls set_attribute -> _remove_attribute @ attributes.c:70-76",
        "_remove_attribute reads header from cur via TEE_MemMove @ attributes.c:75 and later memmoves data @ attributes.c:84"
      ],
      "sink": "TEE_MemMove operations that copy based on untrusted header.size and buffer lengths"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled serialized attributes blob supplied via REE to params",
        "No additional runtime integrity checks on attrs_size or individual header.size fields"
      ],
      "attack_scenario": "Craft attrs_size and/or per-attribute header.size so that sizeof(header) or next_off exceeds remaining bytes; trigger TEE_MemMove to read/write past buffer, causing crash or memory corruption.",
      "impact": "Memory corruption leading to denial-of-service, potential arbitrary code execution or disclosure of TA memory depending on layout and exploitation."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes.c:75-76",
        "recommendation": "Ensure end - cur >= sizeof(pkcs11_attribute_head) before copying header; validate header.size against remaining bytes"
      },
      {
        "type": "bounds_check",
        "location": "attributes.c:84",
        "recommendation": "Validate next_off and that (cur + next_off) <= end before memmoving; use safe helpers that check ranges"
      },
      {
        "type": "range_check",
        "location": "modify_attributes_list:215-222",
        "recommendation": "Sanitize head->attrs_size and guard loop iterations to avoid parsing beyond buffer"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of end and cur without checking sizeof(header) prior to memcpy",
        "Header.size is used to compute offsets and copy lengths with no validation"
      ],
      "negative_indicators": [
        "Loop uses cur < end as a bound, which provides partial protection if attrs_size is consistent",
        "Some higher-level checks exist in call chain but do not validate per-header size"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Both target memmoves consume lengths derived from untrusted parsed headers without sufficient per-header bounds checks, producing clear out-of-bounds memory-safety risks.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies header from cur without confirming remaining bytes; header.size then used to drive parsing."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Memmoves remaining bytes based on next_off computed from untrusted header.size without validating bounds."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bound_check",
      "location": "attributes.c:70-71",
      "evidence": "for (; cur < end; cur += len) uses end = cur + head->attrs_size as loop bound"
    },
    {
      "type": "type_validation",
      "location": "object.c:1104-1106",
      "evidence": "entry_copy_object checks ptypes and out->memref.size before proceeding"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "Partially bounded by loop condition cur < end",
      "evidence": "attributes.c:71-72"
    },
    {
      "arg": "cli_head.size / pkcs11_ref.size",
      "why_safe": "Not validated per-entry before use",
      "evidence": "attributes.c:75-76,220-221"
    }
  ],
  "residual_risks": [
    "Line 75/84 prioritized as memory-safety; potential info-disclosure classification not promoted because primary risk is OOB"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Unvalidated header.size used directly in length computations",
      "TEE_MemMove called with computed lengths that can be attacker-controlled"
    ],
    "negative_indicators": [
      "Top-level attrs_size provides a loop bound, reducing some cases but not per-header issues"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety issues are evident and take precedence; lack of per-header bounds checks makes the memmoves at lines 75 and 84 vulnerable to OOB operations.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end-cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies cli_head from cur without explicit remaining-bytes check; cli_head.size then used to advance and parse entries.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 221,
      "function": "modify_attributes_list",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses cli_head.size to compute len and advance loop, enabling mis-parsing or OOB if header is malicious.",
      "code_excerpt": "len = sizeof(cli_head) + cli_head.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); not sensitive but structural channel to REE.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #11: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> add_missing_attribute_id -> set_attribute -> _remove_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairadd_missing_attribute_idset_attribute_remove_attributeTEE_MemMove

実行時間: 137.56秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75, 84

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125/CWE-119

深刻度: HIGH

テイントフロー:

ソース: Attributes blob (cur) originally rooted in templates/serialargs ultimately derived from params (REE-visible)

シンク: TEE_MemMove reads header and later shifts memory using lengths derived from unvalidated header fields

判定理由: Memory-safety issues take priority: both lines perform memory moves driven by unvalidated lengths read from potentially REE-controlled buffers, producing high-confidence vulnerabilities.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: add_missing_attribute_id
プロンプト 中間 (add_missing_attribute_id)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_missing_attribute_id” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [476]:
-- Call #1 at line 476 --
474:
475:
476: >>> rc = add_missing_attribute_id(&pub_head, &priv_head);
477: if (rc)
478: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2786: enum pkcs11_rc add_missing_attribute_id(struct obj_attrs **pub_head,
2787: struct obj_attrs **priv_head)
2788: { 2789: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 2790: void *id1 = NULL; 2791: uint32_t id1_size = 0; 2792: void *id2 = NULL; 2793: uint32_t id2_size = 0; 2794: 2795: assert(pub_head); 2796: assert(priv_head); 2797: 2798: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size); 2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) 2801: return rc; 2802: id1 = NULL; 2803: } else if (!id1_size) { 2804: id1 = NULL; 2805: } 2806: 2807: rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size); 2808: if (rc) { 2809: if (rc != PKCS11_RV_NOT_FOUND) 2810: return rc; 2811: id2 = NULL; 2812: } else if (!id2_size) { 2813: id2 = NULL; 2814: } 2815: 2816: 2817: if (id1 && id2) 2818: return PKCS11_CKR_OK; 2819: 2820: 2821: if (!id1 && !id2) 2822: return PKCS11_CKR_OK; 2823: 2824: 2825: if (id1) 2826: return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size); 2827: else 2828: return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size); 2829: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_missing_attribute_id", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_missing_attribute_id", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_missing_attribute_id)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_missing_attribute_id",
    "tainted_vars": [
      "pub_head",
      "priv_head",
      "id1",
      "id1_size",
      "id2",
      "id2_size"
    ],
    "propagation": [
      {
        "lhs": "id1,id1_size",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2798-2805"
      },
      {
        "lhs": "id2,id2_size",
        "rhs": "get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2807-2814"
      },
      {
        "lhs": "return value",
        "rhs": "set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size) or set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2825-2828"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2795-2796",
        "evidence": "assert(pub_head) and assert(priv_head) ensure non-NULL pointers"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 476,
      "function": "add_missing_attribute_id",
      "rule": "other",
      "why": "alias of pub_head pointer from caller passed into callee; origin is TA-created but ultimately derived from templates that may include REE-originated data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_missing_attribute_id(&pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 476,
      "function": "add_missing_attribute_id",
      "rule": "other",
      "why": "alias of priv_head pointer from caller passed into callee; origin is TA-created but may reference attributes sourced from REE buffers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_missing_attribute_id(&pub_head, &priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2825,
      "function": "add_missing_attribute_id",
      "rule": "weak_input_validation",
      "why": "set_attribute called with id pointer and id_size obtained from get_attribute_ptr without additional validation of provenance or size limits",
      "sink_function": "set_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id1_size,src_sz=id1_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2828,
      "function": "add_missing_attribute_id",
      "rule": "weak_input_validation",
      "why": "set_attribute called with id pointer and id_size obtained from get_attribute_ptr without additional validation of provenance or size limits",
      "sink_function": "set_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id2_size,src_sz=id2_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size);"
    }
  ]
}

関数: set_attribute
プロンプト 中間 (set_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_missing_attribute_id at lines [2826, 2828]:
-- Call #1 at line 2826 --
2824:
2825: if (id1)
2826: >>> return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);
2827: else
2828: return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size);
-- Call #2 at line 2828 --
2826: return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);
2827: else
2828: >>> return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size);
2829: }

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

195: enum pkcs11_rc set_attribute(struct obj_attrs **head, uint32_t attribute,
196: void *data, size_t size)
197: { 198: enum pkcs11_rc rc = PKCS11_CKR_OK; 199: 200: rc = _remove_attribute(head, attribute, false); 201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND) 202: return rc; 203: 204: return add_attribute(head, attribute, data, size); 205: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "_remove_attribute(head, attribute, false) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:200-202"
      },
      {
        "lhs": "return value",
        "rhs": "add_attribute(head, attribute, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:204"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:195-205",
        "evidence": "function relies on callers to provide valid head/data/size; no internal bounds checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2826,
      "function": "set_attribute",
      "rule": "other",
      "why": "alias of priv_head pointer passed from caller into set_attribute; origin is TA-managed obj_attrs pointer (may reference data derived from REE templates)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2826,
      "function": "set_attribute",
      "rule": "other",
      "why": "alias of id1 data pointer (from get_attribute_ptr) passed into set_attribute; id1 likely originates from attribute template bytes parsed from REE-provided buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id1_size,src_sz=id1_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2828,
      "function": "set_attribute",
      "rule": "other",
      "why": "alias of pub_head pointer passed from caller into set_attribute; origin is TA-managed obj_attrs pointer (may reference data derived from REE templates)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2828,
      "function": "set_attribute",
      "rule": "other",
      "why": "alias of id2 data pointer (from get_attribute_ptr) passed into set_attribute; id2 likely originates from attribute template bytes parsed from REE-provided input",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id2_size,src_sz=id2_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_attribute(pub_head, PKCS11_CKA_ID, id2, id2_size);"
    }
  ]
}

関数: _remove_attribute
プロンプト 中間 (_remove_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “_remove_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [200]:
-- Call #1 at line 200 --
198: enum pkcs11_rc rc = PKCS11_CKR_OK;
199:
200: >>> rc = _remove_attribute(head, attribute, false);
201: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
202: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

61: static enum pkcs11_rc _remove_attribute(struct obj_attrs **head,
62: uint32_t attribute, bool empty)
63: { 64: struct obj_attrs *h = *head; 65: char *cur = NULL; 66: char *end = NULL; 67: size_t next_off = 0; 68: 69: 70: cur = (char *)h + sizeof(struct obj_attrs); 71: end = cur + h->attrs_size; 72: for (; cur < end; cur += next_off) { 73: struct pkcs11_attribute_head pkcs11_ref = { }; 74: 75: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 77: 78: if (pkcs11_ref.id != attribute) 79: continue; 80: 81: if (empty && pkcs11_ref.size) 82: return PKCS11_CKR_FUNCTION_FAILED; 83: 84: TEE_MemMove(cur, cur + next_off, end - (cur + next_off)); 85: 86: h->attrs_count--; 87: h->attrs_size -= next_off; 88: end -= next_off; 89: next_off = 0; 90: 91: return PKCS11_CKR_OK; 92: } 93: 94: DMSG("Attribute %s (%#x) not found", id2str_attr(attribute), attribute); 95: return PKCS11_RV_NOT_FOUND; 96: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "_remove_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"_remove_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (_remove_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "_remove_attribute",
    "tainted_vars": [
      "head",
      "h",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size"
    ],
    "propagation": [
      {
        "lhs": "h",
        "rhs": "*head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:64-66"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)h + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70"
      },
      {
        "lhs": "end",
        "rhs": "cur + h->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:71"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:76"
      },
      {
        "lhs": "memory moved",
        "rhs": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:84"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:69-76",
        "evidence": "loop bounds use h->attrs_size and loop condition cur < end; no explicit validation of pkcs11_ref.size before use in next_off calculation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 200,
      "function": "_remove_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller into _remove_attribute; head originates from caller-managed obj_attrs and may reference buffers derived from earlier inputs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = _remove_attribute(head, attribute, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "_remove_attribute",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size read from buffer at cur to compute next_off and as a memmove length without validating it against attrs_size, enabling out-of-bounds/mis-sized moves",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from _remove_attribute at lines [75, 84, 119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 75 --
73: struct pkcs11_attribute_head pkcs11_ref = { };
74:
75: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:
-- Call #2 at line 84 --
82: return PKCS11_CKR_FUNCTION_FAILED;
83:
84: >>> TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:
86: h->attrs_count--;
-- Call #3 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #4 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #5 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #6 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #7 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #8 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #9 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #10 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #11 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #12 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at lines [75, 84]:
70: cur = (char *)h + sizeof(struct obj_attrs);
71: end = cur + h->attrs_size;
72:     	for (; cur < end; cur += next_off) {
73:     		struct pkcs11_attribute_head pkcs11_ref = { };
74:     
75: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
76:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
77:     
78:     		if (pkcs11_ref.id != attribute)
79:     			continue;
80:     
81:     		if (empty && pkcs11_ref.size)
82:     			return PKCS11_CKR_FUNCTION_FAILED;
83:     
84: >>> 		TEE_MemMove(cur, cur + next_off, end - (cur + next_off));
85:     
86:     		h->attrs_count--;
87:     		h->attrs_size -= next_off;
88:     		end -= next_off;
89:     		next_off = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (e.g., cur or attr_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75,84,119,187,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length expression",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:75,84,119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344-346,352-354",
        "evidence": "some callers use MIN(...) or explicit strlen-based lengths; otherwise TEE_MemMove relies on callers to ensure length correctness"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 75,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dest (&pkcs11_ref) is TA-local but src (cur) may be REE-derived buffer; binding of destination to caller origin recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=h->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 84,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "memmove uses len computed from pkcs11_ref.size without prior robust validation against attrs_size, allowing out-of-bounds move",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=end - (cur + next_off),src_sz=h->attrs_size,dst_sz=h->attrs_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(cur, cur + next_off, end - (cur + next_off));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr (possibly REE-derived) into attr buffer pointer provided by caller; bind src provenance",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into preallocated buffer using prefix_len+1 provided by caller; binding of src/dst origins recorded",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies struct head from ref into local head; binds caller ref provenance to destination local variable",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix (caller-provided) into pre buffer before logging; records aliasing of caller buffer into local logging buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [75, 84]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [75, 84] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      75,
      84
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 75,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads sizeof(pkcs11_ref) from cur (source may be REE-derived) without validating that end - cur >= sizeof(pkcs11_ref), enabling out-of-bounds read of header.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 84,
      "function": "_remove_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Uses pkcs11_ref.size (from unvalidated buffer) to compute next_off and then memmove length end - (cur + next_off) without ensuring next_off is within attrs_size, enabling out-of-bounds/mis-sized move.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125/CWE-119",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Attributes blob (cur) originally rooted in templates/serialargs ultimately derived from params (REE-visible)",
      "propagation_path": [
        "params (REE) -> pub_template/priv_template (processing.c)",
        "template bytes -> obj_attrs->h->attrs (attributes.c): cur points into attrs (@ attributes.c:70)",
        "cur -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (@ attributes.c:75)",
        "pkcs11_ref.size -> next_off -> TEE_MemMove(cur, cur+next_off, end-(cur+next_off)) (@ attributes.c:76,84)"
      ],
      "sink": "TEE_MemMove reads header and later shifts memory using lengths derived from unvalidated header fields"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed attributes blob in REE-provided memref reaches h->attrs buffer",
        "No additional validation that ensures each attribute header and size fit inside h->attrs_size"
      ],
      "attack_scenario": "Crafted attributes cause pkcs11_ref.size to be large or inconsistent so TEE_MemMove reads/writes out-of-bounds, potentially enabling memory disclosure or corruption leading to control-flow hijack or data leak.",
      "impact": "Memory corruption or information disclosure within TA; possible panic, arbitrary code execution in TA context or leakage of TA-private data."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "_remove_attribute:70-76",
        "recommendation": "Validate that end - cur >= sizeof(pkcs11_attribute_head) before reading header; validate pkcs11_ref.size and that sizeof(pkcs11_ref)+pkcs11_ref.size <= end - cur"
      },
      {
        "type": "range_check",
        "location": "_remove_attribute:76-84",
        "recommendation": "Ensure next_off is non-zero, within remaining attrs_size and does not cause underflow in end - (cur + next_off) before memmove"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of pkcs11_ref.size (from buffer) to compute move offset",
        "No explicit validation of sizeof(header) vs remaining bytes before header read",
        "Memmove length derived from unvalidated values"
      ],
      "negative_indicators": [
        "Loop uses cur < end and end = cur0 + h->attrs_size (gives some contextual bounds), but does not ensure header size fits",
        "Some call sites use MIN(...) elsewhere, but not here"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issues take priority: both lines perform memory moves driven by unvalidated lengths read from potentially REE-controlled buffers, producing high-confidence vulnerabilities.",
    "vulnerable_line_count": 2,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 75,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header read from cur without checking remaining bytes (end - cur >= sizeof(header))"
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 84,
        "function": "_remove_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Memmove length computed from pkcs11_ref.size without validating next_off against attrs_size, enabling out-of-bounds move"
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "loop:cur<end in _remove_attribute",
      "evidence": "loop condition uses end = cur0 + h->attrs_size to bound iteration"
    }
  ],
  "argument_safety": [
    {
      "arg": "h->attrs_size",
      "why_safe": "partially bounds iteration",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:70-72"
    }
  ],
  "residual_risks": [
    "Line 75/84 memory-safety findings suppress but do not eliminate potential information disclosure of TA-private attributes if exploited; ensure explicit validation to prevent both corruption and leaks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of unvalidated size usage",
      "Multiple call sites and propagation chain from REE-controlled params"
    ],
    "negative_indicators": [
      "Some higher-level checks exist elsewhere but do not cover these specific header/size reads"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given unvalidated header and size-driven memmove, memory-safety violations are present and take precedence; these are high-confidence vulnerabilities needing bounds checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies enum rc into caller memref (REE-visible); structural binding recorded though not sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated handles into caller-provided out buffer; structural risk recorded.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2825,
      "function": "add_missing_attribute_id",
      "sink_function": "set_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id1_size,src_sz=id1_size,dst_sz=unknown"
        ]
      },
      "why": "set_attribute invoked with id pointer and id_size from get_attribute_ptr without stronger validation",
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    }
  ]
}
フロー #12: TA_InvokeCommandEntryPoint -> entry_wrap_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 197.75秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: Serialized attributes region pointed to by head (head->attrs region)

シンク: TEE_MemMove reads sizeof(pkcs11_ref) from cur into local struct

判定理由: Memory-safety precedence: an unchecked TEE_MemMove reading a fixed struct from a serialized region without verifying full struct fits within bounds constitutes a weak-input-validation flaw (CWE-125); existing loop condition is insufficient.

信頼度: MEDIUM

LLM対話履歴 (14 メッセージ)

関数: entry_wrap_key
プロンプト 中間 (entry_wrap_key)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_wrap_key” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [353]:
-- Call #1 at line 353 --
351: break;
352: case PKCS11_CMD_WRAP_KEY:
353: >>> rc = entry_wrap_key(client, ptypes, params);
354: break;
355: case PKCS11_CMD_UNWRAP_KEY:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

1107: enum pkcs11_rc entry_wrap_key(struct pkcs11_client *client,
1108: uint32_t ptypes, TEE_Param *params)
1109: { 1110: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1111: TEE_PARAM_TYPE_NONE, 1112: TEE_PARAM_TYPE_MEMREF_OUTPUT, 1113: TEE_PARAM_TYPE_NONE); 1114: TEE_Param *ctrl = params; 1115: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 1116: struct serialargs ctrlargs = { }; 1117: struct pkcs11_session *session = NULL; 1118: struct pkcs11_attribute_head *proc_params = NULL; 1119: struct pkcs11_object *wrapping_key = NULL; 1120: struct pkcs11_object *key = NULL; 1121: void *req_attrs = NULL; 1122: uint32_t wrapping_key_handle = 0; 1123: uint32_t key_handle = 0; 1124: uint32_t size = 0; 1125: void *key_data = NULL; 1126: uint32_t key_sz = 0; 1127: void *out_buf = params[2].memref.buffer; 1128: uint32_t out_size = params[2].memref.size; 1129: const enum processing_func function = PKCS11_FUNCTION_WRAP; 1130: 1131: if (!client || ptypes != exp_pt || 1132: (out_size && !out_buf)) 1133: return PKCS11_CKR_ARGUMENTS_BAD; 1134: 1135: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1136: 1137: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1138: if (rc) 1139: return rc; 1140: 1141: rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t)); 1142: if (rc) 1143: return rc; 1144: 1145: rc = serialargs_get(&ctrlargs, &key_handle, sizeof(uint32_t)); 1146: if (rc) 1147: return rc; 1148: 1149: rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params); 1150: if (rc) 1151: return rc; 1152: 1153: if (serialargs_remaining_bytes(&ctrlargs)) { 1154: rc = PKCS11_CKR_ARGUMENTS_BAD; 1155: goto out_free; 1156: } 1157: 1158: rc = get_ready_session(session); 1159: if (rc) 1160: goto out_free; 1161: 1162: wrapping_key = pkcs11_handle2object(wrapping_key_handle, session); 1163: if (!wrapping_key) { 1164: rc = PKCS11_CKR_WRAPPING_KEY_HANDLE_INVALID; 1165: goto out_free; 1166: } 1167: 1168: key = pkcs11_handle2object(key_handle, session); 1169: if (!key) { 1170: rc = PKCS11_CKR_KEY_HANDLE_INVALID; 1171: goto out_free; 1172: } 1173: 1174: 1180: if (key == wrapping_key) { 1181: rc = PKCS11_CKR_WRAPPING_KEY_HANDLE_INVALID; 1182: goto out_free; 1183: } 1184: 1185: rc = set_processing_state(session, function, wrapping_key, NULL); 1186: if (rc) 1187: goto out_free; 1188: 1189: 1190: rc = check_mechanism_against_processing(session, proc_params->id, 1191: function, 1192: PKCS11_FUNC_STEP_INIT); 1193: if (rc) 1194: goto out; 1195: 1196: 1200: rc = check_parent_attrs_against_processing(proc_params->id, function, 1201: wrapping_key->attributes); 1202: if (rc) { 1203: 1208: if (rc == PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED) 1209: rc = PKCS11_CKR_WRAPPING_KEY_TYPE_INCONSISTENT; 1210: 1211: goto out; 1212: } 1213: 1214: 1215: rc = check_access_attrs_against_token(session, 1216: wrapping_key->attributes); 1217: if (rc) 1218: goto out; 1219: 1220: switch (get_class(key->attributes)) { 1221: case PKCS11_CKO_SECRET_KEY: 1222: case PKCS11_CKO_PRIVATE_KEY: 1223: break; 1224: default: 1225: rc = PKCS11_CKR_KEY_NOT_WRAPPABLE; 1226: goto out; 1227: } 1228: 1229: 1230: if (!get_bool(key->attributes, PKCS11_CKA_EXTRACTABLE)) { 1231: DMSG("Extractable property is false"); 1232: rc = PKCS11_CKR_KEY_UNEXTRACTABLE; 1233: goto out; 1234: } 1235: 1236: if (get_bool(key->attributes, PKCS11_CKA_WRAP_WITH_TRUSTED) && 1237: !get_bool(wrapping_key->attributes, PKCS11_CKA_TRUSTED)) { 1238: DMSG("Wrap with trusted not satisfied"); 1239: rc = PKCS11_CKR_KEY_NOT_WRAPPABLE; 1240: goto out; 1241: } 1242: 1243: rc = check_access_attrs_against_token(session, key->attributes); 1244: if (rc) 1245: goto out; 1246: 1247: rc = get_attribute_ptr(wrapping_key->attributes, 1248: PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size); 1249: if (rc == PKCS11_CKR_OK && size != 0) { 1250: if (!attributes_match_reference(key->attributes, req_attrs)) { 1251: rc = PKCS11_CKR_KEY_HANDLE_INVALID; 1252: goto out; 1253: } 1254: } 1255: 1256: rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz); 1257: if (rc) 1258: goto out; 1259: 1260: if (processing_is_tee_symm(proc_params->id)) { 1261: rc = init_symm_operation(session, PKCS11_FUNCTION_ENCRYPT, 1262: proc_params, wrapping_key); 1263: if (rc) 1264: goto out; 1265: 1266: rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, 1267: &out_size); 1268: } else { 1269: rc = init_asymm_operation(session, PKCS11_FUNCTION_ENCRYPT, 1270: proc_params, wrapping_key); 1271: if (rc) 1272: goto out; 1273: 1274: rc = wrap_data_by_asymm_enc(session, key_data, key_sz, out_buf, 1275: &out_size); 1276: } 1277: 1278: if (rc == PKCS11_CKR_OK || rc == PKCS11_CKR_BUFFER_TOO_SMALL) 1279: params[2].memref.size = out_size; 1280: 1281: out: 1282: release_active_processing(session); 1283: out_free: 1284: TEE_Free(key_data); 1285: TEE_Free(proc_params); 1286: return rc; 1287: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_wrap_key", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_wrap_key", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_wrap_key)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_wrap_key",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "params[2].memref.buffer",
      "params[2].memref.size",
      "out_buf",
      "out_size",
      "key_data",
      "key_sz",
      "wrapping_key_handle",
      "key_handle",
      "proc_params"
    ],
    "propagation": [
      {
        "lhs": "out_buf",
        "rhs": "params[2].memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1277"
      },
      {
        "lhs": "out_size",
        "rhs": "params[2].memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1278"
      },
      {
        "lhs": "ctrlargs",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1135"
      },
      {
        "lhs": "wrapping_key_handle",
        "rhs": "serialargs_get(&ctrlargs, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1141-1143"
      },
      {
        "lhs": "key_handle",
        "rhs": "serialargs_get(&ctrlargs, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1145-1147"
      },
      {
        "lhs": "key_data, key_sz",
        "rhs": "alloc_key_data_to_wrap(key->attributes, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1256-1258"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1131",
        "evidence": "ptypes must equal exp_pt (TEE_PARAM_TYPES(...)) or return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1131-1133",
        "evidence": "(out_size && !out_buf) -> return"
      },
      {
        "kind": "post-call_size_update",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1278-1279",
        "evidence": "If wrap call returns OK or BUFFER_TOO_SMALL, params[2].memref.size = out_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 353,
      "function": "entry_wrap_key",
      "rule": "other",
      "why": "Call-site binding: callee 'client' parameter is alias of caller-local client; origin uncertain (derived from tee_session).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_wrap_key(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 353,
      "function": "entry_wrap_key",
      "rule": "other",
      "why": "Call-site binding: callee 'ptypes' parameter is caller-provided command type (REE-originated scalar).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_wrap_key(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 353,
      "function": "entry_wrap_key",
      "rule": "other",
      "why": "Call-site binding: callee 'params' parameter aliases caller-provided TEE_Param array (shared/REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=TEE_NUM_PARAMS*sizeof(TEE_Param),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_wrap_key(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "rule": "shared_memory_overwrite",
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) using out_size derived from params[2].memref.size without an effective upper bound check; key_data is TA-private secret being written to shared memory.",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1230, 1236, 1237]:
-- Call #1 at line 1230 --
1228:
1229:
1230: >>> if (!get_bool(key->attributes, PKCS11_CKA_EXTRACTABLE)) { 1231: DMSG("Extractable property is false"); 1232: rc = PKCS11_CKR_KEY_UNEXTRACTABLE; -- Call #2 at line 1236 -- 1234: }
1235:
1236: >>> if (get_bool(key->attributes, PKCS11_CKA_WRAP_WITH_TRUSTED) &&
1237:     	    !get_bool(wrapping_key->attributes, PKCS11_CKA_TRUSTED)) {
1238:     		DMSG("Wrap with trusted not satisfied");
-- Call #3 at line 1237 --
1235:     
1236:     	if (get_bool(key->attributes, PKCS11_CKA_WRAP_WITH_TRUSTED) &&
1237: >>> 	    !get_bool(wrapping_key->attributes, PKCS11_CKA_TRUSTED)) {
1238:     		DMSG("Wrap with trusted not satisfied");
1239:     		rc = PKCS11_CKR_KEY_NOT_WRAPPABLE;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output of get_attribute(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "If get_attribute returns PKCS11_RV_NOT_FOUND then get_bool returns false"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1230,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases key->attributes from entry_wrap_key (object attributes), origin is TA-resident attributes structure.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "if (!get_bool(key->attributes, PKCS11_CKA_EXTRACTABLE)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1236,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases key->attributes for wrap-with-trusted check; attributes are TA-managed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "if (get_bool(key->attributes, PKCS11_CKA_WRAP_WITH_TRUSTED) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1237,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases wrapping_key->attributes for trusted check; attributes originate from object in TA.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "!get_bool(wrapping_key->attributes, PKCS11_CKA_TRUSTED)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute to return OK or NOT_FOUND; other error codes cause assert(rc==OK) which may crash instead of graceful handling.",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "size",
        "rhs": "output size from get_attribute_ptr(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-181"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) if attr != NULL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      },
      {
        "lhs": "*attr_size",
        "rhs": "size (reported size) on success or when buffer too small",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then *attr_size = size and return PKCS11_CKR_BUFFER_TOO_SMALL"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188",
        "evidence": "If attr is NULL skip TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided attributes (e.g., key->attributes) whose provenance is TA-resident.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter aliases caller stack buffer (&bbool) where attribute bytes will be copied.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases caller local 'size' used for bounds checking and reporting.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer 'attr' via TEE_MemMove; attr_ptr provenance depends on get_attribute_ptr and size-driven copy could overwrite if callers misreport attr_size (handled above).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr)\n    TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs (via absence/presence of error return)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Returns NOT_FOUND if count==0; returns GENERAL_ERROR if count!=1; enforces single-match expectation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller attributes (e.g., from get_attribute), provenance is TA-resident object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter will be set to internal attribute storage pointer (TA-managed).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=pointer_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter reports attribute size back to caller (used for subsequent bounds decisions).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases candidate object's attributes (TA-managed), used to compare against reference.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter yields pointer to attribute value used in equality/size checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=pointer_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' provides size for subsequent comparison against pkcs11_ref.size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter is dereferenced object attributes pointer from caller; provenance TA-managed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter returns pointer to attribute storage used/checked by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=pointer_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter reports attribute size back to caller for branching (e.g., add_attribute).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (derived from memory at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "attr_ptr[] / attr_size_ptr[]",
        "rhs": "assigned from cur + sizeof(pkcs11_ref) and pkcs11_ref.size when id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes discovered)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "Loop condition cur < end prevents advancing past declared attrs region; next_off computed from embedded size"
      },
      {
        "kind": "post_loop_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end -> TEE_Panic(0) signals detection of structure corruption"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller attributes structure (TA-managed) used for internal iteration.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs)+head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter aliases caller buffers (attr_ptr) that will be written with pointers into head's storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=pointer_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter aliases caller storage for sizes (attr_size_ptr) used to report each attribute's size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4*max_found,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from untrusted offsets inside head via TEE_MemMove without explicit validation of pkcs11_ref.size beyond loop bounds; malformed attrs_size could cause logic errors.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size derived from data in memory; if pkcs11_ref.size is corrupted this can misadvance cur causing out-of-bounds or infinite loop.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If cur > end the code calls TEE_Panic(0) indicating detection of malformed attributes; this is an abort-path rather than graceful error handling.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copy of len bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [
      {
        "kind": "min_size_check_usage",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353-354",
        "evidence": "Uses MIN(pkcs11_ref.size, sizeof(data)) when copying into fixed-size local buffer"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from memory at cur into local struct; pkcs11_ref.size later used to compute next_off without stronger validation of serialized contents.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from internal attr_ptr into caller buffer 'attr' using size determined by attribute metadata; attr is caller-provided and must be trusted for capacity checks performed earlier.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute payload into small local array; uses MIN as safeguard.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized object header from ref into local head via TEE_MemMove; ref provenance impacts trust (could be TA-managed or external), caller checks follow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into pre buffer using strlen(prefix) without explicit check of pre capacity at this site (caller must ensure buffer is large enough).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur without ensuring cur+sizeof(pkcs11_ref) <= end (loop uses cur < end only), allowing out-of-bounds read or misparsed size to influence control flow.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "Serialized attributes region pointed to by head (head->attrs region)",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> params (caller memrefs) @ entry.c:353",
        "entry_wrap_key: out_buf/params etc. -> key attributes read -> get_attribute_ptrs @ attributes.c:107-119 (cur derived from head)",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads sizeof(pkcs11_ref) from cur into local struct"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or corrupted head->attrs_size or serialized content such that cur points near end or pkcs11_ref.size is malformed",
        "Ability to supply or influence the serialized attributes blob stored in head"
      ],
      "attack_scenario": "Malformed or truncated serialized attribute blob causes TEE_MemMove to read beyond the intended buffer, leading to misparsed pkcs11_ref.size and control-flow anomalies (possible panic or logic corruption).",
      "impact": "Denial-of-service via TEE_Panic or incorrect control flow; potential memory disclosure or logic errors depending on surrounding code"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before calling TEE_MemMove; validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size for reasonable limits (e.g., not larger than remaining attrs region) before adding to next_off to avoid integer overflow/misadvance."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of TEE_MemMove with sizeof(pkcs11_ref) and only cur<end loop condition",
        "next_off computed from pkcs11_ref.size (derived from copied bytes) which can be attacker-controlled"
      ],
      "negative_indicators": [
        "Loop has cur < end and there is a later check cur > end that triggers TEE_Panic (some protection)",
        "Attributes region is typically TA-managed (not necessarily REE-controlled)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety precedence: an unchecked TEE_MemMove reading a fixed struct from a serialized region without verifying full struct fits within bounds constitutes a weak-input-validation flaw (CWE-125); existing loop condition is insufficient.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads pkcs11_attribute_head from cur using TEE_MemMove without ensuring the full header fits before the end of attributes region."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "Loop uses cur < end to limit iteration but does not check cur+sizeof(pkcs11_ref) <= end before the copy"
    },
    {
      "type": "post_loop_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "If cur > end the code calls TEE_Panic(0) indicating detection of malformed attributes"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Typically TA-managed object attributes structure",
      "evidence": "attributes.c:107-109"
    },
    {
      "arg": "cur",
      "why_safe": "Derived from head and bounded by head->attrs_size via end, but lacking full-header fit check",
      "evidence": "attributes.c:107-119"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding also implies downstream logic may miscompute next_off (line 120) leading to out-of-bounds advances or panic; this could enable denial-of-service."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Missing explicit check cur+sizeof(header) <= end before TEE_MemMove",
      "Use of embedded size field (pkcs11_ref.size) to compute next_off"
    ],
    "negative_indicators": [
      "There is an overall region bound (end) and a panic on cur> end which may limit exploitation",
      "Attributes are typically TA-managed (reduces attacker control)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The TEE_MemMove at line 119 reads a fixed header from a serialized region without ensuring the entire header fits; this is a weak input validation leading to a memory-safety issue (CWE-125) with medium confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from data read by line 119; corrupted size can misadvance cur causing out-of-bounds or infinite loop.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "why": "If cur > end the code calls TEE_Panic(0); this is an abort-path rather than graceful error handling and may be triggered by malformed attributes.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute bytes from internal attr_ptr into caller buffer using size determined by metadata; relies on earlier size checks.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) using out_size derived from params[2].memref.size without an effective upper bound check; key_data is TA-private secret being written to shared memory.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #13: TA_InvokeCommandEntryPoint -> entry_wrap_key -> set_processing_state -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyset_processing_stateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 179.68秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

安全判定理由: The memcpy at line 119 copies a fixed-size header into a local TA buffer guarded by loop bounds (cur < end) and a post-loop panic on overflow; no REE-visible sink or sensitive data exfiltration occurs at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (14 メッセージ)

関数: set_processing_state
プロンプト 中間 (set_processing_state)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_processing_state” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1185]:
-- Call #1 at line 1185 --
1183: }
1184:
1185: >>> rc = set_processing_state(session, function, wrapping_key, NULL);
1186: if (rc)
1187: goto out_free;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

187: enum pkcs11_rc set_processing_state(struct pkcs11_session *session,
188: enum processing_func function,
189: struct pkcs11_object *obj1,
190: struct pkcs11_object *obj2)
191: { 192: enum pkcs11_proc_state state = PKCS11_SESSION_READY; 193: struct active_processing *proc = NULL; 194: 195: if (session->processing) 196: return PKCS11_CKR_OPERATION_ACTIVE; 197: 198: switch (function) { 199: case PKCS11_FUNCTION_ENCRYPT: 200: state = PKCS11_SESSION_ENCRYPTING; 201: break; 202: case PKCS11_FUNCTION_DECRYPT: 203: state = PKCS11_SESSION_DECRYPTING; 204: break; 205: case PKCS11_FUNCTION_SIGN: 206: state = PKCS11_SESSION_SIGNING; 207: break; 208: case PKCS11_FUNCTION_VERIFY: 209: state = PKCS11_SESSION_VERIFYING; 210: break; 211: case PKCS11_FUNCTION_DIGEST: 212: state = PKCS11_SESSION_DIGESTING; 213: break; 214: case PKCS11_FUNCTION_DERIVE: 215: case PKCS11_FUNCTION_WRAP: 216: case PKCS11_FUNCTION_UNWRAP: 217: state = PKCS11_SESSION_BUSY; 218: break; 219: default: 220: TEE_Panic(function); 221: return -1; 222: } 223: 224: proc = TEE_Malloc(sizeof(*proc), TEE_MALLOC_FILL_ZERO); 225: if (!proc) 226: return PKCS11_CKR_DEVICE_MEMORY; 227: 228: 229: proc->state = state; 230: proc->step = PKCS11_FUNC_STEP_INIT; 231: proc->tee_op_handle = TEE_HANDLE_NULL; 232: proc->tee_hash_algo = 0; 233: proc->tee_hash_op_handle = TEE_HANDLE_NULL; 234: 235: if (obj1 && get_bool(obj1->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE)) 236: proc->always_authen = true; 237: 238: if (obj2 && get_bool(obj2->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE)) 239: proc->always_authen = true; 240: 241: session->processing = proc; 242: 243: return PKCS11_CKR_OK; 244: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_processing_state", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_processing_state", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_processing_state)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_processing_state",
    "tainted_vars": [
      "session",
      "function",
      "obj1",
      "obj2",
      "proc"
    ],
    "propagation": [
      {
        "lhs": "state",
        "rhs": "function -> session state mapping (switch)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:198-222"
      },
      {
        "lhs": "proc",
        "rhs": "TEE_Malloc(sizeof(*proc), ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:224-226"
      },
      {
        "lhs": "proc->always_authen",
        "rhs": "get_bool(obj1->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE) / get_bool(obj2->attributes, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:235-239"
      },
      {
        "lhs": "session->processing",
        "rhs": "proc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:241-243"
      }
    ],
    "sanitizers": [
      {
        "kind": "state_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:195-196",
        "evidence": "if (session->processing) return PKCS11_CKR_OPERATION_ACTIVE"
      },
      {
        "kind": "alloc_null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:224-226",
        "evidence": "if (!proc) return PKCS11_CKR_DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1185,
      "function": "set_processing_state",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases session object obtained earlier in TA (TA-private); passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct pkcs11_session),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = set_processing_state(session, function, wrapping_key, NULL);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1185,
      "function": "set_processing_state",
      "rule": "other",
      "why": "Call-site binding: 'obj1' parameter (wrapping_key) aliases a key object from handle lookup; promotes sensitivity as 'key'.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:key",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct pkcs11_object),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = set_processing_state(session, function, wrapping_key, NULL);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1185,
      "function": "set_processing_state",
      "rule": "other",
      "why": "Call-site binding: 'obj2' parameter is NULL at call-site (no object), recorded for completeness.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = set_processing_state(session, function, wrapping_key, NULL);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_processing_state at lines [235, 238]:
-- Call #1 at line 235 --
233: proc->tee_hash_op_handle = TEE_HANDLE_NULL;
234:
235: >>> if (obj1 && get_bool(obj1->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE))
236: proc->always_authen = true;
237:
-- Call #2 at line 238 --
236: proc->always_authen = true;
237:
238: >>> if (obj2 && get_bool(obj2->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE))
239: proc->always_authen = true;
240:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: { 235: enum pkcs11_rc rc = PKCS11_CKR_OK; 236: uint8_t bbool = 0; 237: uint32_t size = sizeof(bbool); 238: 239: rc = get_attribute(head, attribute, &bbool, &size); 240: 241: if (rc == PKCS11_RV_NOT_FOUND) 242: return false; 243: 244: assert(rc == PKCS11_CKR_OK); 245: return bbool; 246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_bool", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_bool", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (unless PKCS11_RV_NOT_FOUND -> false)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "not_found_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "if (rc == PKCS11_RV_NOT_FOUND) return false"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 235,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases obj1->attributes (object attributes), origin is TA-private object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (obj1 && get_bool(obj1->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 238,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases obj2->attributes (object attributes), origin is TA-private object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (obj2 && get_bool(obj2->attributes, PKCS11_CKA_ALWAYS_AUTHENTICATE))"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size (when attr_size present or after copy)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-183,189-190"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "propagate error if get_attribute_ptr returns rc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj1->attributes (object attributes) from caller; origin TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter is &bbool (caller stack buffer), origin TA-private small buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter is &size (caller-provided), used for bounds checking and updated with actual size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr; relies on earlier attr_size check when attr_size provided.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return rc",
        "rhs": "implicit based on count checks (returns NOT_FOUND if !count, GENERAL_ERROR if count!=1, OK otherwise)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter at caller (get_attribute) aliases caller's object attributes (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter is &attr_ptr (caller stack), will point into object attribute storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is &size (caller stack) used for reported attribute length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter at caller (attributes candidate) aliases candidate object's attributes (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' parameter is &value (caller stack/local), will receive pointer to attribute data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter is &size (caller variable) used to compare against expected pkcs11_ref.size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter is *head (caller dereferenced pointer to attributes list), origin TA-private mutable list.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' parameter is &value (caller stack/local), will receive pointer to attribute data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter is &size (caller variable) used to receive attribute length for subsequent add_attribute call.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "cur = (char *)head + sizeof(struct obj_attrs); end = cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr / attr_size_ptr (outputs)",
        "rhs": "on match, *attr_ptr = cur + sizeof(pkcs11_ref); *attr_size_ptr = pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop condition uses cur < end and next_off computed; later check panics if cur > end"
      },
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller's object attribute list; arithmetic on head->attrs_size drives parsing bounds.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter is caller-provided buffer of pointers; function writes pointers into it when matches found.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=found*sizeof(void*),src_sz=found*(sizeof(void*)+pkcs11_ref.size),dst_sz=*count*sizeof(void*)"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is caller-provided buffer of sizes; function writes pkcs11_ref.size into it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=found*sizeof(uint32_t),src_sz=found*pkcs11_ref.size,dst_sz=*count*sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "TEE_MemMove reads pkcs11_attribute_head from cur; next_off uses pkcs11_ref.size for loop advance—size field influences control flow and can lead to overflow if corrupted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Post-loop check panics if cur > end, indicating reliance on header sizes for memory safety; malformed attrs_size can trigger TEE_Panic.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "n",
        "rhs": "size argument controlling copy length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy; callers are expected to ensure bounds"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header from cur (inside object attribute blob) into local pkcs11_ref; size field from that header influences subsequent next_off arithmetic (control-flow influence).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size+sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload pointed by attr_ptr into caller-provided buffer 'attr'; relies on prior attr_size check to avoid overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies cli_head from cur for parsing; subsequent len uses cli_head.size to advance parsing pointer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=cli_head.size+sizeof(cli_head),dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (origin of ref_attr unclear); if ref_attr is attacker-controlled, header fields may be tainted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (caller-supplied reference); subsequent get_attribute_ptr uses pkcs11_ref.id/size influencing control flow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 using prefix_len+1; must ensure prefix_len is valid to avoid overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=strlen(prefix),dst_sz=prefix_len+1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from cur into pkcs11_ref and then small sample into local data[]; uses MIN(pkcs11_ref.size, sizeof(data)) to limit copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref) then MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size+sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref) or sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized head from ref into local head; if ref is attacker-controlled, head.attrs_count may be tainted and affect later logic.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer for logging; ensure pre is allocated and prefix length sane to avoid overflow or information leak to logs.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copy length is fixed sizeof(pkcs11_ref) and performed while iterating with loop condition cur < end (bounds checked); destination is local TA-private stack struct, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The memcpy at line 119 copies a fixed-size header into a local TA buffer guarded by loop bounds (cur < end) and a post-loop panic on overflow; no REE-visible sink or sensitive data exfiltration occurs at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "loop condition cur < end and next_off computed; uses head->attrs_size to limit parsing"
    },
    {
      "type": "overflow_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "cur (src pointer)",
      "why_safe": "Derived from head + offset and iterated only while cur < end",
      "evidence": "get_attribute_ptrs:107-115"
    },
    {
      "arg": "dst (&pkcs11_ref)",
      "why_safe": "Local stack buffer sized for sizeof(pkcs11_ref)",
      "evidence": "get_attribute_ptrs:117-119"
    }
  ],
  "residual_risks": [
    "line 119: header field pkcs11_ref.size influences next_off and loop advancement; a malformed attrs_size or corrupted header could trigger TEE_Panic or unexpected control flow (structural risk)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed-size copy (sizeof(pkcs11_ref))",
      "Loop guard cur < end prevents reading past attribute blob",
      "Post-loop panic if cur > end"
    ],
    "negative_indicators": [
      "next_off uses pkcs11_ref.size (attacker-controlled if attrs blob corrupted), which affects control flow and could cause higher-level issues",
      "Origin of head may be unknown in some call-sites (ref/serialized input), so upstream taint could exist"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety at this exact copy is enforced by loop bounds and fixed copy size; destination is TA-private local, so no information disclosure to REE at this line. Structural risks remain elsewhere where sizes influence parsing.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref)+pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "pkcs11_ref.size (from the copied header) is used to compute next_off and drive loop advancement; if pkcs11_ref.size is corrupted, parsing can exceed bounds or trigger panic.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}
フロー #14: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 204.28秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: Serialized attributes region reachable via caller-provided params (params -> ctrl->memref.buffer parsed into head/template).

シンク: TEE_MemMove reads sizeof(pkcs11_ref) bytes from 'cur' which may be close to/ past end of attrs region

判定理由: The immediate sink reads a fixed header size from a current pointer only guarded by cur < end; this canonical pattern allows an attacker-controlled serialized blob to position cur such that the fixed-size read overruns the buffer, and header.size is then trusted — this is a direct memory-safety weakness (weak input validation) with high confidence.

信頼度: HIGH

LLM対話履歴 (16 メッセージ)

関数: check_created_attrs_against_token
プロンプト 中間 (check_created_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_created_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [281, 494, 502, 959]:
-- Call #1 at line 281 --
279: goto out;
280:
281: >>> rc = check_created_attrs_against_token(session, head);
282: if (rc)
283: goto out;
-- Call #2 at line 494 --
492: goto out;
493:
494: >>> rc = check_created_attrs_against_token(session, pub_head);
495: if (rc)
496: goto out;
-- Call #3 at line 502 --
500: goto out;
501:
502: >>> rc = check_created_attrs_against_token(session, priv_head);
503: if (rc)
504: goto out;
-- Call #4 at line 959 --
957: goto out;
958:
959: >>> rc = check_created_attrs_against_token(session, head);
960: if (rc)
961: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1579: enum pkcs11_rc check_created_attrs_against_token(struct pkcs11_session *session,
1580: struct obj_attrs *head)
1581: { 1582: enum pkcs11_rc rc = PKCS11_CKR_OK; 1583: 1584: rc = check_attrs_misc_integrity(head); 1585: if (rc) 1586: return rc; 1587: 1588: if (get_bool(head, PKCS11_CKA_TRUSTED) && 1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); 1591: 1592: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; 1593: } 1594: 1595: if (get_bool(head, PKCS11_CKA_TOKEN) && 1596: !pkcs11_session_is_read_write(session)) { 1597: DMSG("Can't create persistent object"); 1598: 1599: return PKCS11_CKR_SESSION_READ_ONLY; 1600: } 1601: 1602: return PKCS11_CKR_OK; 1603: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_created_attrs_against_token", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_created_attrs_against_token", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_created_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_created_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "check_attrs_misc_integrity(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584-1586"
      },
      {
        "lhs": "branch on get_bool(head, PKCS11_CKA_TRUSTED)",
        "rhs": "head contents (attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1588-1593"
      },
      {
        "lhs": "branch on get_bool(head, PKCS11_CKA_TOKEN)",
        "rhs": "head contents (attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1595-1600"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584-1586",
        "evidence": "check_attrs_misc_integrity(head) validates attribute integrity"
      },
      {
        "kind": "access_control_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1588-1593",
        "evidence": "pkcs11_session_is_so(session) gating trusted-object creation"
      },
      {
        "kind": "access_control_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1595-1600",
        "evidence": "pkcs11_session_is_read_write(session) gating persistent-object creation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 281,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "Binding of caller 'session' pointer into callee parameter; origin not proven TEE-private (could be influenced by REE path).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 281,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "Binding of caller 'head' (attributes) into callee parameter; head may originate from REE-parsed template or TA-created attrs—origin ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "check_created_attrs_against_token",
      "rule": "weak_input_validation",
      "why": "Uses get_bool(head, ...) on attributes that may be derived from REE-provided templates; attributes should be strictly validated earlier.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session)) {"
    }
  ]
}

関数: check_attrs_misc_integrity
プロンプト 中間 (check_attrs_misc_integrity)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attrs_misc_integrity” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1584]:
-- Call #1 at line 1584 --
1582: enum pkcs11_rc rc = PKCS11_CKR_OK;
1583:
1584: >>> rc = check_attrs_misc_integrity(head);
1585: if (rc)
1586: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504: { 1505: if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && 1506: get_bool(head, PKCS11_CKA_EXTRACTABLE)) { 1507: DMSG("Never/Extractable attributes mismatch %d/%d", 1508: get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE), 1509: get_bool(head, PKCS11_CKA_EXTRACTABLE)); 1510: 1511: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1512: } 1513: 1514: if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && 1515: !get_bool(head, PKCS11_CKA_SENSITIVE)) { 1516: DMSG("Sensitive/always attributes mismatch %d/%d", 1517: get_bool(head, PKCS11_CKA_SENSITIVE), 1518: get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE)); 1519: 1520: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1521: } 1522: 1523: return PKCS11_CKR_OK; 1524: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attrs_misc_integrity", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attrs_misc_integrity", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attrs_misc_integrity)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attrs_misc_integrity",
    "tainted_vars": [
      "head",
      "get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE)",
      "get_bool(head, PKCS11_CKA_EXTRACTABLE)",
      "get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE)",
      "get_bool(head, PKCS11_CKA_SENSITIVE)",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1512"
      },
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && !get_bool(head, PKCS11_CKA_SENSITIVE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1514-1521"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1523",
        "evidence": "Function enforces consistency rules (returns TEMPLATE_INCONSISTENT on mismatch)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1505,
      "function": "check_attrs_misc_integrity",
      "rule": "weak_input_validation",
      "why": "Relies on get_bool(head, ...) to validate attributes that may originate from REE-provided templates; upstream validation may be insufficient.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1584,
      "function": "check_attrs_misc_integrity",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter; origin ambiguous (could be derived from REE template), so attribute integrity depends on upstream parsing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "code_excerpt": "rc = check_attrs_misc_integrity(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_misc_integrity at lines [1505, 1506, 1508, 1509, 1514, 1515, 1517, 1518, 1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1505 --
1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504:     {
1505: >>> 	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
-- Call #2 at line 1506 --
1504:     {
1505:     	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506: >>> 	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
-- Call #3 at line 1508 --
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508: >>> 		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509:     		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
-- Call #4 at line 1509 --
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509: >>> 		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
1511:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #5 at line 1514 --
1512:     	}
1513:     
1514: >>> 	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
-- Call #6 at line 1515 --
1513:     
1514:     	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515: >>> 	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
-- Call #7 at line 1517 --
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517: >>> 		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518:     		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
-- Call #8 at line 1518 --
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518: >>> 		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
1520:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #9 at line 1528 --
1526:     bool object_is_private(struct obj_attrs *head)
1527:     {
1528: >>> 	return get_bool(head, PKCS11_CKA_PRIVATE);
1529:     }
1530:     
-- Call #10 at line 1533 --
1531:     bool object_is_token(struct obj_attrs *head)
1532:     {
1533: >>> 	return get_bool(head, PKCS11_CKA_TOKEN);
1534:     }
1535:     
-- Call #11 at line 1538 --
1536:     bool object_is_modifiable(struct obj_attrs *head)
1537:     {
1538: >>> 	return get_bool(head, PKCS11_CKA_MODIFIABLE);
1539:     }
1540:     
-- Call #12 at line 1543 --
1541:     bool object_is_copyable(struct obj_attrs *head)
1542:     {
1543: >>> 	return get_bool(head, PKCS11_CKA_COPYABLE);
1544:     }
1545:     
-- Call #13 at line 1588 --
1586:     		return rc;
1587:     
1588: >>> 	if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589:     	    !pkcs11_session_is_so(session)) {
1590:     		DMSG("Can't create trusted object");
-- Call #14 at line 1595 --
1593:     	}
1594:     
1595: >>> 	if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #15 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #16 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #17 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #18 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #19 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #20 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #21 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #22 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #23 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #24 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(bbool)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-238"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "get_bool(...) return value",
        "rhs": "bbool (when rc == PKCS11_CKR_OK) or false (when PKCS11_RV_NOT_FOUND)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "Returns false if attribute not found; asserts rc == PKCS11_CKR_OK otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1505,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into get_bool parameter; origin may be REE-derived template or TA-created attrs, origin ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 241,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Asserts rc == OK after get_attribute; if attribute data originate from REE parsing, relying on assert may be insufficient validation.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "if (rc == PKCS11_RV_NOT_FOUND)\n    return false;\n\nassert(rc == PKCS11_CKR_OK);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "size",
      "attr",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr,size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(...) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (written)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "*attr_size",
        "rhs": "size (updated on buffer-too-small or on success)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-182,189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter; origin may be REE-derived or TA-created, ambiguous origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller buffer pointer (attr -> &bbool) into callee 'attr' parameter; origin is caller-local (TA) not REE-shared.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller size pointer (&size) into callee 'attr_size' parameter; used for bounds checks and size reporting.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller buffer via TEE_MemMove; safety relies on prior attr_size check which is conditional (attr_size may be NULL).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr)\n    TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs result (checked via count afterwards)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count==0 -> NOT_FOUND, count!=1 -> GENERAL_ERROR to validate uniqueness"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter; origin ambiguous (may be REE-derived template or TA-internal).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller 'attr_ptr' (out pointer) into callee parameter; this provides downstream access to attribute storage (origin depends on head).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller 'attr_size' pointer into callee parameter; used for bounds and count reporting, origin is caller-provided.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "found, attr_ptr, attr_size_ptr",
        "rhs": "if pkcs11_ref.id == attribute then update found and store pointers/sizes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-139"
      },
      {
        "lhs": "*count",
        "rhs": "found at end of function",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-116",
        "evidence": "for (; cur < end; cur += next_off) loop conditions ensure cur < end before iteration"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then TEE_Panic(0) (detects overrun)"
      },
      {
        "kind": "count_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110-111,140-141,150",
        "evidence": "Uses max_found and breaks when found == max_found; writes back *count = found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter at call-site; origin ambiguous (could be REE-derived template).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding of caller 'attr' (out pointer array) into callee parameter; provides references to attribute payloads for callers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "void **attr_ptr = attr;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding of caller 'attr_size' pointer into callee parameter; used to report sizes to caller and checked.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "uint32_t *attr_size_ptr = attr_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Copies attribute header from serialized region into stack (TEE_MemMove) and uses pkcs11_ref.size to compute next_off without prior validation of size field, enabling out-of-bounds or integer overflow if input is malicious.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dst (written)",
        "rhs": "src (read) with length len",
        "site": "callsites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c (e.g.,:119,187,220,265,298,344,352,353,435,447)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from serialized region (src 'cur') into stack struct without validating pkcs11_ref.size before using it to compute next_off; malicious size may cause logic/integer errors or loop misbehavior.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr (may point into serialized/REE-controlled area) into caller buffer 'attr'; safety relies on prior attr_size checks at caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer (dest) using strlen(prefix) as length; origin and size of 'pre' not validated here (caller must ensure buffer large enough).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies pkcs11_attribute_head from cur using sizeof(header) while loop condition only checks cur < end (not cur + sizeof(header)), and header.size is later used to compute next_off without validation — untrusted serialized data from REE can trigger out-of-bounds read/logic corruption.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "Serialized attributes region reachable via caller-provided params (params -> ctrl->memref.buffer parsed into head/template).",
      "propagation_path": [
        "params[0/1/2] (REE-provided memrefs) -> serialargs parsing -> template/head creation @ processing.c:226-268",
        "head (serialized attrs) -> get_attribute_ptrs: cur = (char*)head + sizeof(struct obj_attrs) @ attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from 'cur' which may be close to/ past end of attrs region"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized attribute blob passed via REE-visible memref",
        "attrs_size value set such that cur < end but cur + sizeof(pkcs11_ref) > end (off-by-less-than-header)"
      ],
      "attack_scenario": "Maliciously crafted attribute data causes TEE_MemMove to read beyond the serialized buffer, leading to crash (TEE_Panic via subsequent check) or exposure of adjacent memory leading to information disclosure or logic corruption (next_off computed from attacker-controlled size).",
      "impact": "Denial of service (panic/crash) and potential memory disclosure or incorrect parsing leading to downstream privilege/control-flow issues."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before copying header; validate pkcs11_ref.size against remaining bytes to prevent overflow when computing next_off."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Validate header.size is within reasonable limits and that sizeof(pkcs11_ref)+header.size does not overflow size_t or exceed remaining buffer."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition uses cur < end but copy uses fixed sizeof(header) without checking remaining bytes",
        "Subsequent use of header.size to compute next_off with no validation"
      ],
      "negative_indicators": [
        "Function later checks cur > end and panics, which may limit some exploitation but still indicates unsafe behavior",
        "Higher-level checks exist in callers for some contexts (e.g., expected types), but do not validate serialized inner sizes"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The immediate sink reads a fixed header size from a current pointer only guarded by cur < end; this canonical pattern allows an attacker-controlled serialized blob to position cur such that the fixed-size read overruns the buffer, and header.size is then trusted — this is a direct memory-safety weakness (weak input validation) with high confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header copied from 'cur' without ensuring full header fits within remaining attrs region; header.size then used unchecked."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-116",
      "evidence": "for (; cur < end; cur += next_off) loop condition ensures cur < end before iteration but does not ensure header fits"
    },
    {
      "type": "panic_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "If cur > end then TEE_Panic(0) detects overruns after the fact"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated by caller in some paths (attrs_size checked), but serialized inner sizes are not fully validated",
      "evidence": "processing.c:249 and checks in entry_generate_secret ensure template_size and other higher-level checks, but do not validate inner pkcs11_ref.size fields"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses any separate unencrypted-output classification for that copy; if header contains secrets and is later forwarded to REE, disclose risk remains"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from potentially attacker-controlled buffer using fixed size without sufficient remaining-length check",
      "Subsequent use of copied header fields (size) without validation"
    ],
    "negative_indicators": [
      "Loop contains a later panic if cur > end which may limit exploitation in some cases"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the evidence shows an unchecked fixed-size read from a moving pointer within a serialized blob; this is a clear weak input validation leading to potential out-of-bounds read and downstream unsafe behavior.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Header copied from serialized region without validating remaining bytes; header.size later trusted to compute next_off.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute payload into caller buffer; relies on caller-provided attr_size checks to avoid overflow.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 236,
      "function": "get_bool/get_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "why": "get_bool asserts rc == OK after get_attribute; if attribute parsing originates from REE, relying on assert may be insufficient validation.",
      "code_excerpt": "if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 263,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "why": "Template-derived attributes (head) are created from REE-provided serialized input; their internal sizes need validation before use.",
      "code_excerpt": "rc = create_attributes_from_template(&head, template, template_size, ...);"
    }
  ]
}
フロー #15: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 294.08秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: Serialized attributes blob (head->attrs_size and embedded pkcs11_ref fields) derived from caller-controlled data

シンク: TEE_MemMove reads header from cur without ensuring sizeof(pkcs11_ref) bytes remain

判定理由: Direct evidence of an out-of-bounds read: the code copies a fixed-size header from cur without verifying that the remaining buffer contains that header; attacker-controlled serialized sizes determine cur/end and pkcs11_ref.size.

信頼度: HIGH

LLM対話履歴 (16 メッセージ)

関数: check_created_attrs_against_token
プロンプト 中間 (check_created_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_created_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [494, 502, 959]:
-- Call #1 at line 494 --
492: goto out;
493:
494: >>> rc = check_created_attrs_against_token(session, pub_head);
495: if (rc)
496: goto out;
-- Call #2 at line 502 --
500: goto out;
501:
502: >>> rc = check_created_attrs_against_token(session, priv_head);
503: if (rc)
504: goto out;
-- Call #3 at line 959 --
957: goto out;
958:
959: >>> rc = check_created_attrs_against_token(session, head);
960: if (rc)
961: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1579: enum pkcs11_rc check_created_attrs_against_token(struct pkcs11_session *session,
1580: struct obj_attrs *head)
1581: { 1582: enum pkcs11_rc rc = PKCS11_CKR_OK; 1583: 1584: rc = check_attrs_misc_integrity(head); 1585: if (rc) 1586: return rc; 1587: 1588: if (get_bool(head, PKCS11_CKA_TRUSTED) && 1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); 1591: 1592: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; 1593: } 1594: 1595: if (get_bool(head, PKCS11_CKA_TOKEN) && 1596: !pkcs11_session_is_read_write(session)) { 1597: DMSG("Can't create persistent object"); 1598: 1599: return PKCS11_CKR_SESSION_READ_ONLY; 1600: } 1601: 1602: return PKCS11_CKR_OK; 1603: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_created_attrs_against_token", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_created_attrs_against_token", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_created_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_created_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "check_attrs_misc_integrity(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584"
      },
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_TRUSTED) and pkcs11_session_is_so(session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1588-1593"
      },
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_TOKEN) and pkcs11_session_is_read_write(session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1595-1600"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584-1586",
        "evidence": "check_attrs_misc_integrity(head) returns error on integrity issues"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 494,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of session pointer passed from caller into callee; session provenance internal but upstream binding from entry_generate_key_pair",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 494,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of pub_head (obj_attrs) passed from caller into callee; pub_head derived in TA from templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 502,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of session pointer passed from caller into callee at second call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 502,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of priv_head (obj_attrs) passed from caller into callee; priv_head derived in TA from templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 959,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of session pointer passed from caller into callee at third call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 959,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "alias of head (obj_attrs) passed from caller into callee at third call-site; head provenance depends on caller context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    }
  ]
}

関数: check_attrs_misc_integrity
プロンプト 中間 (check_attrs_misc_integrity)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attrs_misc_integrity” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1584]:
-- Call #1 at line 1584 --
1582: enum pkcs11_rc rc = PKCS11_CKR_OK;
1583:
1584: >>> rc = check_attrs_misc_integrity(head);
1585: if (rc)
1586: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504: { 1505: if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && 1506: get_bool(head, PKCS11_CKA_EXTRACTABLE)) { 1507: DMSG("Never/Extractable attributes mismatch %d/%d", 1508: get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE), 1509: get_bool(head, PKCS11_CKA_EXTRACTABLE)); 1510: 1511: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1512: } 1513: 1514: if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && 1515: !get_bool(head, PKCS11_CKA_SENSITIVE)) { 1516: DMSG("Sensitive/always attributes mismatch %d/%d", 1517: get_bool(head, PKCS11_CKA_SENSITIVE), 1518: get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE)); 1519: 1520: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1521: } 1522: 1523: return PKCS11_CKR_OK; 1524: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attrs_misc_integrity", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attrs_misc_integrity", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attrs_misc_integrity)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attrs_misc_integrity",
    "tainted_vars": [
      "head",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1512"
      },
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && !get_bool(head, PKCS11_CKA_SENSITIVE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1514-1521"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1512",
        "evidence": "Checks for contradictory attribute booleans and returns PKCS11_CKR_TEMPLATE_INCONSISTENT"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1514-1521",
        "evidence": "Checks for sensitive/always mismatches and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1584,
      "function": "check_attrs_misc_integrity",
      "rule": "other",
      "why": "alias of head (obj_attrs) passed from caller into callee; head originates in caller and may contain caller-controlled attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_attrs_misc_integrity(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_misc_integrity at lines [1505, 1506, 1508, 1509, 1514, 1515, 1517, 1518, 1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1505 --
1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504:     {
1505: >>> 	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
-- Call #2 at line 1506 --
1504:     {
1505:     	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506: >>> 	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
-- Call #3 at line 1508 --
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508: >>> 		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509:     		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
-- Call #4 at line 1509 --
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509: >>> 		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
1511:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #5 at line 1514 --
1512:     	}
1513:     
1514: >>> 	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
-- Call #6 at line 1515 --
1513:     
1514:     	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515: >>> 	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
-- Call #7 at line 1517 --
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517: >>> 		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518:     		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
-- Call #8 at line 1518 --
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518: >>> 		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
1520:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #9 at line 1528 --
1526:     bool object_is_private(struct obj_attrs *head)
1527:     {
1528: >>> 	return get_bool(head, PKCS11_CKA_PRIVATE);
1529:     }
1530:     
-- Call #10 at line 1533 --
1531:     bool object_is_token(struct obj_attrs *head)
1532:     {
1533: >>> 	return get_bool(head, PKCS11_CKA_TOKEN);
1534:     }
1535:     
-- Call #11 at line 1538 --
1536:     bool object_is_modifiable(struct obj_attrs *head)
1537:     {
1538: >>> 	return get_bool(head, PKCS11_CKA_MODIFIABLE);
1539:     }
1540:     
-- Call #12 at line 1543 --
1541:     bool object_is_copyable(struct obj_attrs *head)
1542:     {
1543: >>> 	return get_bool(head, PKCS11_CKA_COPYABLE);
1544:     }
1545:     
-- Call #13 at line 1588 --
1586:     		return rc;
1587:     
1588: >>> 	if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589:     	    !pkcs11_session_is_so(session)) {
1590:     		DMSG("Can't create trusted object");
-- Call #14 at line 1595 --
1593:     	}
1594:     
1595: >>> 	if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #15 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #16 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #17 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #18 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #19 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #20 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #21 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #22 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #23 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #24 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output buffer written by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "return value",
        "rhs": "bbool when rc == PKCS11_CKR_OK, false when rc == PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "Handles PKCS11_RV_NOT_FOUND by returning false; asserts rc == PKCS11_CKR_OK otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 233,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of caller-provided head (obj_attrs) pointer used to index attributes; head may originate from caller-controlled templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "bool get_bool(struct obj_attrs *head, uint32_t attribute)"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size determined by get_attribute_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:174-176,189-190"
      },
      {
        "lhs": "attr (buffer)",
        "rhs": "memmove from attr_ptr of length size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-189"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided head pointer passed into get_attribute; head may contain caller-controlled attribute pointers/templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "attr argument is caller stack buffer (&bbool) passed as destination for TEE_MemMove; destination region is TEE-private but size is caller-provided",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "attr_size argument (&size) is caller stack pointer passed in and used for bounds check/length reporting",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "count",
        "rhs": "output from get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count == 0 -> PKCS11_RV_NOT_FOUND; count != 1 -> PKCS11_CKR_GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller-provided head pointer passed into get_attribute_ptrs; head may originate from caller-controlled templates/structures",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr is an out-parameter passed to get_attribute_ptrs to receive pointer to attribute data; origin and size of pointed data depend on head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size is passed to get_attribute_ptrs for length reporting and bounds checks; value may be influenced by caller later used in copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "&count (address of local count) is passed into get_attribute_ptrs to receive number of matches; subsequent logic depends on its value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (from data read at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "*count (out)",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      },
      {
        "lhs": "*attr (out pointers)",
        "rhs": "cur + sizeof(pkcs11_ref) when pkcs11_ref.size != 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-134"
      },
      {
        "lhs": "*attr_size (out)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then TEE_Panic(0) (explicit overflow check triggers panic)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided head pointer passed into helper; head->attrs_size and embedded pkcs11_ref fields are used to compute bounds and offsets",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Reads pkcs11_attribute_head from cur (TEE_MemMove) where cur is computed from head and head->attrs_size; pkcs11_ref.size (data-controlled) is used to compute next_off and loop progression",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Uses pkcs11_ref.size (read from serialized data) to compute next_off and to set attr_size; untrusted size can influence pointer arithmetic and later copies",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Writes out pointers into the serialized buffer (cur + sizeof(pkcs11_ref)) into caller-provided attr array; these pointers alias into head's memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 137,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Writes attribute sizes (pkcs11_ref.size) into caller-provided attr_size array; sizes derived from serialized data affect downstream bounds checks and copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*attr_size_ptr++ = pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "bytes copied from src of length n",
        "site": "caller sites (various): see attributes.c callers"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized attribute header from buffer at cur into local pkcs11_ref; source buffer derived from head and head->attrs_size influences src bounds and is potentially attacker-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value from attr_ptr (pointer into serialized region) into caller buffer attr; attr_size is used as bound and may be influenced by serialized data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies client-supplied serialized attribute header into cli_head; source comes from cur computed from head and can affect next length computations",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (possibly REE-originated serialized ref) into local header; ref_attr size influences subsequent attribute lookups",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_len,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into prefix2 using prefix_len computed elsewhere; dest buffer and prefix_len must be consistent to avoid overflow",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=prefix_len+1,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref into local struct and then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes into data; pkcs11_ref.size (from serialized data) controls copy length",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head from ref into local head; ref length must match sizeof(head) else behavior is uncertain",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=ref_len,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer using strlen(prefix); source prefix may be attacker-influenced affecting length used",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur while loop condition uses cur < end (head + attrs_size) rather than ensuring cur + sizeof(pkcs11_ref) <= end, allowing an out-of-bounds read driven by untrusted pkcs11_ref.size/attrs_size.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "Serialized attributes blob (head->attrs_size and embedded pkcs11_ref fields) derived from caller-controlled data",
      "propagation_path": [
        "params (TEE_Param.memref.buffer) -> head (obj_attrs) @ processing.c:448-463",
        "head->attrs_size used to compute end and cur @ attributes.c:107-108",
        "cur (pointer into serialized blob) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads header from cur without ensuring sizeof(pkcs11_ref) bytes remain"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled serialized attribute data supplied to the TA (e.g., via params memref).",
        "head->attrs_size is crafted so that cur < end but cur + sizeof(pkcs11_ref) > end (off-by-one or truncated blob)."
      ],
      "attack_scenario": "Supply a truncated or specially-crafted serialized attributes buffer so that the MemMove at line 119 reads beyond the buffer, causing out-of-bounds read leading to crash or disclosure of adjacent memory.",
      "impact": "Information disclosure or denial-of-service (panic/crash) depending on memory layout; possible corruption if downstream uses malformed sizes as lengths."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure (cur + sizeof(pkcs11_ref)) <= end before calling TEE_MemMove; validate head->attrs_size and each pkcs11_ref.size against remaining buffer length."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size is reasonable (e.g., not causing next_off to wrap or exceed remaining bytes) before using it to compute next_off or expose pointers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition uses cur < end but no pre-copy check for sizeof(pkcs11_ref)",
        "pkcs11_ref.size (from serialized data) influences offsets and copy lengths"
      ],
      "negative_indicators": [
        "There is a later check if (cur > end) { TEE_Panic(0); } but it occurs after the read and does not prevent the initial over-read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Direct evidence of an out-of-bounds read: the code copies a fixed-size header from cur without verifying that the remaining buffer contains that header; attacker-controlled serialized sizes determine cur/end and pkcs11_ref.size.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from cur using TEE_MemMove(sizeof(pkcs11_ref)) while only checking cur < end, allowing out-of-bounds read when remaining bytes < sizeof(pkcs11_ref)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "used to compute end but not strictly validated against header read size before copy",
      "evidence": "attributes.c:107-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses but does not address potential information-flow concerns (e.g., copying TA-private secrets into REE) elsewhere in the chain."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct missing pre-copy bounds check",
      "Subsequent logic uses untrusted sizes"
    ],
    "negative_indicators": [
      "Panic on overflow exists but is executed after the unsafe read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "This is a memory-safety vulnerability (out-of-bounds read) because the code performs a fixed-size copy from a position that has not been proven to contain that many bytes; the later panic does not prevent the initial unsafe read.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "pkcs11_ref.size from serialized data is used to compute next_off and later as reported attr_size; untrusted size can influence pointer arithmetic and later copies",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "why": "Writes out pointers into caller-provided attr array pointing inside serialized blob; these alias into head's memory and rely on head being well-formed",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk: REE-visible destination but values are non-sensitive handles",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #16: TA_InvokeCommandEntryPoint -> entry_create_object -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_create_objectcheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 304.22秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Serialized attributes blob originally derived from REE-provided template (params -> parsed into head)

シンク: TEE_MemMove reads header bytes from an attacker-influenced buffer into a local struct

判定理由: Memory-safety issue (out-of-bounds read/loop arithmetic using attacker-controlled size) takes precedence; insufficient local checks before copying header make TEE_MemMove at line 119 vulnerable.

信頼度: HIGH

LLM対話履歴 (18 メッセージ)

関数: entry_create_object
プロンプト 中間 (entry_create_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_create_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [206]:
-- Call #1 at line 206 --
204:
205: case PKCS11_CMD_CREATE_OBJECT:
206: >>> rc = entry_create_object(client, ptypes, params);
207: break;
208: case PKCS11_CMD_DESTROY_OBJECT:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

300: enum pkcs11_rc entry_create_object(struct pkcs11_client *client,
301: uint32_t ptypes, TEE_Param *params)
302: { 303: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 304: TEE_PARAM_TYPE_NONE, 305: TEE_PARAM_TYPE_MEMREF_OUTPUT, 306: TEE_PARAM_TYPE_NONE); 307: enum pkcs11_rc rc = PKCS11_CKR_OK; 308: TEE_Param *ctrl = params; 309: TEE_Param *out = params + 2; 310: struct serialargs ctrlargs = { }; 311: struct pkcs11_session *session = NULL; 312: struct obj_attrs *head = NULL; 313: struct pkcs11_object_head *template = NULL; 314: size_t template_size = 0; 315: uint32_t obj_handle = 0; 316: 317: 320: 321: if (!client || ptypes != exp_pt || 322: out->memref.size != sizeof(obj_handle)) 323: return PKCS11_CKR_ARGUMENTS_BAD; 324: 325: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 326: 327: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 328: if (rc) 329: return rc; 330: 331: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 332: if (rc) 333: return rc; 334: 335: if (serialargs_remaining_bytes(&ctrlargs)) { 336: rc = PKCS11_CKR_ARGUMENTS_BAD; 337: goto out; 338: } 339: 340: template_size = sizeof(*template) + template->attrs_size; 341: 342: 346: rc = create_attributes_from_template(&head, template, template_size, 347: NULL, PKCS11_FUNCTION_IMPORT, 348: PKCS11_PROCESSING_IMPORT, 349: PKCS11_CKO_UNDEFINED_ID); 350: TEE_Free(template); 351: template = NULL; 352: if (rc) 353: goto out; 354: 355: 359: rc = check_created_attrs_against_processing(PKCS11_PROCESSING_IMPORT, 360: head); 361: if (rc) 362: goto out; 363: 364: rc = check_created_attrs_against_token(session, head); 365: if (rc) 366: goto out; 367: 368: rc = check_access_attrs_against_token(session, head); 369: if (rc) 370: goto out; 371: 372: 377: rc = create_object(session, head, &obj_handle); 378: if (rc) 379: goto out; 380: 381: 388: head = NULL; 389: 390: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle)); 391: out->memref.size = sizeof(obj_handle); 392: 393: DMSG("PKCS11 session %"PRIu32": import object %#"PRIx32, 394: session->handle, obj_handle); 395: 396: out: 397: TEE_Free(template); 398: TEE_Free(head); 399: 400: return rc; 401: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_create_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_create_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_create_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_create_object",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "template"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:308"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:309"
      },
      {
        "lhs": "serialargs (ctrlargs) buffer",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:325"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:331-333"
      },
      {
        "lhs": "obj_handle (written)",
        "rhs": "create_object(session, head, &obj_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:377-379"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:321-323",
        "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:335-338",
        "evidence": "serialargs_remaining_bytes ensures no trailing input"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 206,
      "function": "entry_create_object",
      "rule": "other",
      "why": "Call-site binding: callee 'client' parameter is alias of caller-provided client pointer; origin region unclear from call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_create_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 206,
      "function": "entry_create_object",
      "rule": "other",
      "why": "Call-site binding: callee 'params' parameter aliases caller's params (TEE_Param array) which is REE-originated/shared.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_create_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "rule": "other",
      "why": "Copies local obj_handle into out->memref.buffer (caller-provided REE-visible memref) via TEE_MemMove; destination is shared/REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: check_created_attrs_against_token
プロンプト 中間 (check_created_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_created_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_create_object at lines [364]:
-- Call #1 at line 364 --
362: goto out;
363:
364: >>> rc = check_created_attrs_against_token(session, head);
365: if (rc)
366: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1579: enum pkcs11_rc check_created_attrs_against_token(struct pkcs11_session *session,
1580: struct obj_attrs *head)
1581: { 1582: enum pkcs11_rc rc = PKCS11_CKR_OK; 1583: 1584: rc = check_attrs_misc_integrity(head); 1585: if (rc) 1586: return rc; 1587: 1588: if (get_bool(head, PKCS11_CKA_TRUSTED) && 1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); 1591: 1592: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; 1593: } 1594: 1595: if (get_bool(head, PKCS11_CKA_TOKEN) && 1596: !pkcs11_session_is_read_write(session)) { 1597: DMSG("Can't create persistent object"); 1598: 1599: return PKCS11_CKR_SESSION_READ_ONLY; 1600: } 1601: 1602: return PKCS11_CKR_OK; 1603: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_created_attrs_against_token", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_created_attrs_against_token", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_created_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_created_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "rc",
      "get_bool(head, ...)"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "check_attrs_misc_integrity(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584-1586"
      },
      {
        "lhs": "branch on get_bool(head, PKCS11_CKA_TRUSTED)",
        "rhs": "head contents",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1588-1593"
      },
      {
        "lhs": "branch on get_bool(head, PKCS11_CKA_TOKEN)",
        "rhs": "head contents",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1595-1600"
      }
    ],
    "sanitizers": [
      {
        "kind": "integrity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1584-1586",
        "evidence": "check_attrs_misc_integrity(head) returns error if integrity fails"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 364,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: callee 'session' parameter is alias of caller-provided session pointer from entry_create_object; origin region not explicit at call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 364,
      "function": "check_created_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes built earlier (origin: parsed from REE template then converted) — record as TEE-private alias of processed REE input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "check_created_attrs_against_token",
      "rule": "weak_input_validation",
      "why": "Decisions (trusted/token) are based on attributes in 'head' via get_bool; if 'head' was influenced by REE input, insufficient additional authorization checks here could allow privilege escalation.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session)) {"
    }
  ]
}

関数: check_attrs_misc_integrity
プロンプト 中間 (check_attrs_misc_integrity)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attrs_misc_integrity” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1584]:
-- Call #1 at line 1584 --
1582: enum pkcs11_rc rc = PKCS11_CKR_OK;
1583:
1584: >>> rc = check_attrs_misc_integrity(head);
1585: if (rc)
1586: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504: { 1505: if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && 1506: get_bool(head, PKCS11_CKA_EXTRACTABLE)) { 1507: DMSG("Never/Extractable attributes mismatch %d/%d", 1508: get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE), 1509: get_bool(head, PKCS11_CKA_EXTRACTABLE)); 1510: 1511: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1512: } 1513: 1514: if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && 1515: !get_bool(head, PKCS11_CKA_SENSITIVE)) { 1516: DMSG("Sensitive/always attributes mismatch %d/%d", 1517: get_bool(head, PKCS11_CKA_SENSITIVE), 1518: get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE)); 1519: 1520: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 1521: } 1522: 1523: return PKCS11_CKR_OK; 1524: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attrs_misc_integrity", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attrs_misc_integrity", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attrs_misc_integrity)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attrs_misc_integrity",
    "tainted_vars": [
      "head",
      "rc",
      "get_bool(head, ...)"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1512"
      },
      {
        "lhs": "rc",
        "rhs": "get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) && !get_bool(head, PKCS11_CKA_SENSITIVE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1514-1521"
      }
    ],
    "sanitizers": [
      {
        "kind": "consistency_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1505-1512",
        "evidence": "returns PKCS11_CKR_TEMPLATE_INCONSISTENT if NEVER_EXTRACTABLE and EXTRACTABLE both set"
      },
      {
        "kind": "consistency_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1514-1521",
        "evidence": "returns PKCS11_CKR_TEMPLATE_INCONSISTENT if ALWAYS_SENSITIVE set but SENSITIVE not set"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 364,
      "function": "check_attrs_misc_integrity",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes constructed from REE-provided template earlier; record origin as TEE-private converted from REE input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_attrs_misc_integrity(head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1505,
      "function": "check_attrs_misc_integrity",
      "rule": "weak_input_validation",
      "why": "Decisions are made from boolean attributes in 'head' (e.g., extractable/sensitive); if 'head' derived from untrusted REE input, these checks may be insufficient to prevent inconsistent or malicious templates.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE))"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_misc_integrity at lines [1505, 1506, 1508, 1509, 1514, 1515, 1517, 1518, 1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1505 --
1503: static enum pkcs11_rc check_attrs_misc_integrity(struct obj_attrs *head)
1504:     {
1505: >>> 	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
-- Call #2 at line 1506 --
1504:     {
1505:     	if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&
1506: >>> 	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
-- Call #3 at line 1508 --
1506:     	    get_bool(head, PKCS11_CKA_EXTRACTABLE)) {
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508: >>> 		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509:     		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
-- Call #4 at line 1509 --
1507:     		DMSG("Never/Extractable attributes mismatch %d/%d",
1508:     		     get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE),
1509: >>> 		     get_bool(head, PKCS11_CKA_EXTRACTABLE));
1510:     
1511:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #5 at line 1514 --
1512:     	}
1513:     
1514: >>> 	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
-- Call #6 at line 1515 --
1513:     
1514:     	if (get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE) &&
1515: >>> 	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
-- Call #7 at line 1517 --
1515:     	    !get_bool(head, PKCS11_CKA_SENSITIVE)) {
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517: >>> 		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518:     		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
-- Call #8 at line 1518 --
1516:     		DMSG("Sensitive/always attributes mismatch %d/%d",
1517:     		     get_bool(head, PKCS11_CKA_SENSITIVE),
1518: >>> 		     get_bool(head, PKCS11_CKA_ALWAYS_SENSITIVE));
1519:     
1520:     		return PKCS11_CKR_TEMPLATE_INCONSISTENT;
-- Call #9 at line 1528 --
1526:     bool object_is_private(struct obj_attrs *head)
1527:     {
1528: >>> 	return get_bool(head, PKCS11_CKA_PRIVATE);
1529:     }
1530:     
-- Call #10 at line 1533 --
1531:     bool object_is_token(struct obj_attrs *head)
1532:     {
1533: >>> 	return get_bool(head, PKCS11_CKA_TOKEN);
1534:     }
1535:     
-- Call #11 at line 1538 --
1536:     bool object_is_modifiable(struct obj_attrs *head)
1537:     {
1538: >>> 	return get_bool(head, PKCS11_CKA_MODIFIABLE);
1539:     }
1540:     
-- Call #12 at line 1543 --
1541:     bool object_is_copyable(struct obj_attrs *head)
1542:     {
1543: >>> 	return get_bool(head, PKCS11_CKA_COPYABLE);
1544:     }
1545:     
-- Call #13 at line 1588 --
1586:     		return rc;
1587:     
1588: >>> 	if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589:     	    !pkcs11_session_is_so(session)) {
1590:     		DMSG("Can't create trusted object");
-- Call #14 at line 1595 --
1593:     	}
1594:     
1595: >>> 	if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #15 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #16 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #17 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #18 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #19 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #20 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #21 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #22 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #23 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #24 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return value)",
        "rhs": "value read into bbool by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "not_found_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "if get_attribute returns PKCS11_RV_NOT_FOUND the function returns false"
      },
      {
        "kind": "assert_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) after get_attribute"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1505,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes structure derived earlier (origin: parsed from REE template then converted to TEE-private), record origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute to populate boolean; if head was influenced by untrusted input, returning false for 'not found' and asserting otherwise may be insufficient validation and can affect control flow.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      },
      {
        "lhs": "attr (buffer) <- memory",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes structure originally constructed from template parsed earlier (origin: REE -> converted to TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' parameter aliases caller-local buffer (&bbool) provided by get_bool; destination is TA-private stack buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller-local size variable (&size) controlling buffer length checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer via TEE_MemMove after a size check; if attr_ptr refers to untrusted/shared memory or size is attacker-influenced, this may expose data or cause overflow if checks bypassed.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "count == 0 ? PKCS11_RV_NOT_FOUND : (count != 1 ? PKCS11_CKR_GENERAL_ERROR : PKCS11_CKR_OK)",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "returns NOT_FOUND if no matches, GENERAL_ERROR if multiple matches"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes structure constructed from REE-provided template earlier (origin: REE -> converted to TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' out-parameter will be set to point into attribute storage; origin region of pointed-to data may be TEE-private or unknown depending on storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' out-parameter aliases caller's size variable to receive attribute size, which influences subsequent copies/size checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptrs to populate count and pointers; if storage returns multiple matches or attacker-influenced pointers, caller decisions depend on these checks.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "(char*)head + sizeof(struct obj_attrs), cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-120"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr entries / attr_size entries",
        "rhs": "if matches then assign pointers/sizes derived from cur and pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "count (out)",
        "rhs": "*count = found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_bound_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "for loop uses cur<end and advances by next_off computed from parsed size field"
      },
      {
        "kind": "range_check_and_panic",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases attributes structure derived from REE-provided template earlier (converted to TA storage).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' out-parameter will receive pointers into the parsed attribute area (points into head's buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=sizeof(void*)*max_found"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' out-parameter aliases caller variable to receive sizes parsed from pkcs11_ref.size and influences later copies.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)*max_found"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Parses pkcs11_ref from serialized blob and uses pkcs11_ref.size to advance and to derive pointers; if pkcs11_ref.size is attacker-controlled, loop arithmetic and pointer arithmetic may be unsafe.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "pkcs11_ref",
      "cur",
      "size"
    ],
    "propagation": [
      {
        "lhs": "pkcs11_ref",
        "rhs": "bytes copied from cur into dest via TEE_MemMove(dest=&pkcs11_ref, src=cur, n=sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_bound_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "for loop uses cur < end and advances by next_off to limit copies"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'dest' parameter is &pkcs11_ref, a TA-stack buffer (local), so copy writes into TA-private memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'src' parameter aliases 'cur' which points into serialized attribute blob derived from head (origin: REE -> parsed into TA storage).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: size 'n' is sizeof(pkcs11_ref) here but callers use variable sizes elsewhere; record that size parameter influences copy length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from serialized blob into local struct and then uses parsed size to advance loop; if parsed size is attacker-controlled, parsing and subsequent arithmetic may be unsafe.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from 'cur' (which points into a serialized, REE-influenced blob) without ensuring the header fits inside the parsed bounds; parsed pkcs11_ref.size is then used for loop arithmetic, enabling malformed sizes to cause out-of-bounds reads/advances.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attributes blob originally derived from REE-provided template (params -> parsed into head)",
      "propagation_path": [
        "params (caller REE-visible) -> template parsed -> head (TA storage) @ ta/object.c:325-341",
        "head -> get_attribute_ptrs cur pointer into head's attrs region @ attributes.c:107-119",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads header bytes from an attacker-influenced buffer into a local struct"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or crafts serialized attribute blob supplied via params.",
        "No upstream normalization ensures serialized blob contains well-formed attribute headers and sizes."
      ],
      "attack_scenario": "A maliciously crafted serialized attributes blob places 'cur' near the end of the region or sets pkcs11_ref.size to a large/invalid value so TEE_MemMove reads past intended bounds, leading to out-of-bounds read and subsequent incorrect arithmetic causing loop corruption or crash (TEE_Panic) and potential memory disclosure depending on layout.",
      "impact": "Out-of-bounds read leading to denial-of-service (panic/crash) and potential disclosure of adjacent TA memory contents; may enable further logic corruption."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that cur + sizeof(pkcs11_ref) <= end before calling TEE_MemMove; validate pkcs11_ref.size is within remaining bounds before using it to compute next_off."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Sanitize pkcs11_ref.size (e.g., upper bound) and reject attributes with sizes that would cause next_off to exceed remaining buffer."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Avoid panic on parse errors where possible; return an error to caller instead of TEE_Panic to limit crash surface."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove from 'cur' without a prior check that header fits inside 'end'.",
        "Parsed pkcs11_ref.size used immediately to compute next_off and advance the loop, directly influenced by blob contents.",
        "Presence of explicit panic when cur > end indicates parsing arithmetic can exceed bounds."
      ],
      "negative_indicators": [
        "Loop uses cur < end as the loop condition, which provides partial protection if headers are well-formed.",
        "There is a later check that panics if cur > end (defensive), not a graceful rejection."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue (out-of-bounds read/loop arithmetic using attacker-controlled size) takes precedence; insufficient local checks before copying header make TEE_MemMove at line 119 vulnerable.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from serialized blob at 'cur' without verifying header fits within remaining attrs region; parsed size then used for pointer arithmetic."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bound_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "for (; cur < end; cur += next_off) uses cur<end to limit iterations"
    },
    {
      "type": "range_check_and_panic",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially validated earlier when building/parsing, but ultimately originates from REE-provided template and is treated as TA storage.",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:325-333"
    }
  ],
  "residual_risks": [
    "line 390: TEE_MemMove to REE-visible out->memref.buffer copies obj_handle to caller (structural, not promoted); potential information flow to REE but obj_handle is non-sensitive",
    "parsing logic: attacker-controlled pkcs11_ref.size influences many subsequent operations (looping, pointer arithmetic) — other sites may be affected"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from parsed blob without header-fit check",
      "Subsequent use of parsed size for arithmetic"
    ],
    "negative_indicators": [
      "Existing cur<end check and later panic may limit silent memory corruption"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The TEE_MemMove at line 119 performs an unchecked read of a header from serialized, potentially attacker-controlled data; this enables out-of-bounds read and corrupts loop arithmetic — a memory-safety vulnerability with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Parses header from serialized attributes and relies on parsed pkcs11_ref.size for loop arithmetic; attacker-controlled size can break bounds and lead to OOB reads.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle (non-sensitive) into caller-provided out->memref.buffer (REE-visible); structural info flow to REE but not promoted to unencrypted_output.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #17: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_paircheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 248.18秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Serialized attribute blob derived from REE-supplied templates (head->attrs region)

シンク: TEE_MemMove reading fixed-size header from cur (attributes.c:119)

判定理由: The copy reads a fixed number of bytes from an untrusted-derived buffer without pre-checking remaining length; this is a classic out-of-bounds read vulnerability (CWE-125) and memory-safety takes precedence.

信頼度: HIGH

LLM対話履歴 (16 メッセージ)

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [498, 506, 656, 742, 933, 963, 1215, 1243]:
-- Call #1 at line 498 --
496: goto out;
497:
498: >>> rc = check_access_attrs_against_token(session, pub_head);
499: if (rc)
500: goto out;
-- Call #2 at line 506 --
504: goto out;
505:
506: >>> rc = check_access_attrs_against_token(session, priv_head);
507: if (rc)
508: goto out;
-- Call #3 at line 656 --
654: goto out;
655:
656: >>> rc = check_access_attrs_against_token(session,
657: obj->attributes);
658: if (rc)
-- Call #4 at line 742 --
740: }
741:
742: >>> rc = check_access_attrs_against_token(session,
743: obj->attributes);
744: if (rc) { -- Call #5 at line 933 -- 931: 932: 933: >>> rc = check_access_attrs_against_token(session, parent->attributes); 934: if (rc) 935: goto out; -- Call #6 at line 963 -- 961: goto out; 962: 963: >>> rc = check_access_attrs_against_token(session, head); 964: if (rc) 965: goto out; -- Call #7 at line 1215 -- 1213: 1214: 1215: >>> rc = check_access_attrs_against_token(session, 1216: wrapping_key->attributes); 1217: if (rc) -- Call #8 at line 1243 -- 1241: }
1242:
1243: >>> rc = check_access_attrs_against_token(session, key->attributes);
1244: if (rc)
1245: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: { 1552: bool private = true; 1553: 1554: switch (get_class(head)) { 1555: case PKCS11_CKO_SECRET_KEY: 1556: case PKCS11_CKO_PRIVATE_KEY: 1557: case PKCS11_CKO_PUBLIC_KEY: 1558: case PKCS11_CKO_DATA: 1559: case PKCS11_CKO_CERTIFICATE: 1560: private = object_is_private(head); 1561: break; 1562: default: 1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; 1564: } 1565: 1566: if (private && (pkcs11_session_is_public(session) || 1567: pkcs11_session_is_so(session))) { 1568: DMSG("Private object access from a public or SO session"); 1569: 1570: return PKCS11_CKR_USER_NOT_LOGGED_IN; 1571: } 1572: 1573: return PKCS11_CKR_OK; 1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_access_attrs_against_token", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_access_attrs_against_token", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private",
      "get_class(head)",
      "object_is_private(head)"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560"
      },
      {
        "lhs": "switch decision",
        "rhs": "get_class(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564"
      },
      {
        "lhs": "return value",
        "rhs": "pkcs11_session_is_public(session) || pkcs11_session_is_so(session) check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564",
        "evidence": "get_class(head) used in switch to ensure supported object classes; default returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 498,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding callee parameter 'session' to caller-provided session value; session is TA-managed but originates from earlier REE-influenced handle resolution",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 498,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs (pub_head); attributes were constructed in-TA from REE-provided templates so origin is TA-private but content is REE-influenced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, pub_head);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(head, PKCS11_CKA_PRIVATE)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1526-1529"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs (pub_head); attributes were constructed from REE-provided templates and thus TA-private but REE-influenced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "private = object_is_private(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-241"
      },
      {
        "lhs": "bbool (returned)",
        "rhs": "output buffer populated by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (or false if PKCS11_RV_NOT_FOUND)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "rc == PKCS11_RV_NOT_FOUND checked, assert(rc == PKCS11_CKR_OK) ensures expected success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs; attributes derive from REE-provided templates so content is REE-influenced though stored TA-side",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "size",
      "attr",
      "attr_size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (output)",
        "rhs": "attr_ptr (source) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      },
      {
        "lhs": "*attr_size (out)",
        "rhs": "size (actual attribute size) assigned",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then *attr_size=size; return BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs; attributes originate from REE-influenced templates though held in TA memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee parameter 'attr' to caller-local buffer (&bbool); dest is TA-stack but may receive data copied from attr_ptr via TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee parameter 'attr_size' to caller-local size variable; used for bounds check and updated with actual size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "checks on count (if !count -> NOT_FOUND; if count != 1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks that count is non-zero and exactly one; returns appropriate error codes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs; origin is TA-side attributes constructed from REE-influenced templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee out-parameter 'attr_ptr' to caller-provided pointer; used to return pointer into attribute storage (may alias TA or shared regions)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee out-parameter 'attr_size' to caller-provided uint32_t; used for bounds checks and size reporting",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "bytes at cur copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:117-119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr / attr_size_ptr",
        "rhs": "incremented and populated when attribute id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "set to found at function end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then panic (Exceeding serial object length)"
      },
      {
        "kind": "loop_guard",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-141",
        "evidence": "Loop advances by next_off and breaks when found == max_found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided obj_attrs; head points into TA-side attribute storage built from REE-influenced templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee out-parameter 'attr' (attr_ptr) to caller-provided buffer; returned pointers alias into attribute region and may point to TA memory derived from REE data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*)*max_found,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee out-parameter 'attr_size' to caller-provided uint32_t array; sizes written from pkcs11_ref.size and used for subsequent bounds checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t)*max_found,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee in-out parameter 'count' to caller-provided size; controls how many matches are collected and is updated with actual found count",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (writes)",
        "rhs": "src (reads) copied for n bytes",
        "site": "multiple call sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447)"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "call sites use surrounding checks (e.g., get_attribute checks attr_size at attributes.c:180-184; loops ensure cur<end in attributes.c:115-141)",
        "evidence": "Some callers validate sizes or use MIN(...) before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from 'cur' (pointer into serialized attribute blob derived from REE-supplied templates) into local pkcs11_ref; source is REE-influenced and used to compute next_off",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr (pointer returned by get_attribute_ptrs) into caller buffer 'attr'; attr_ptr may alias TA storage that was populated from REE-origin data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into local buffer; length driven by pkcs11_ref.size parsed from REE-influenced data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer (dest) using strlen(prefix) length; dest origin and size must be ensured by caller (potential risk if pre not allocated appropriately)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from 'cur' before verifying there are that many bytes remaining; 'cur' is advanced and compared to 'end' only after the copy, allowing a read past end of the serialized blob.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attribute blob derived from REE-supplied templates (head->attrs region)",
      "propagation_path": [
        "params (REE) -> pub_template/priv_template (processing.c:448,461)",
        "pub_head/priv_head built from templates -> obj_attrs head passed into get_attribute_ptrs (attributes.c:158)",
        "cur pointer = (char*)head + sizeof(struct obj_attrs) (attributes.c:107)",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads from cur (attributes.c:119)"
      ],
      "sink": "TEE_MemMove reading fixed-size header from cur (attributes.c:119)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies serialized attribute blob with manipulated attrs_size or truncated content via REE-origin templates.",
        "TA accepts and stores the blob into head without validating that it contains at least sizeof(pkcs11_ref) bytes at current cur."
      ],
      "attack_scenario": "An attacker provides a truncated or malformed serialized attributes buffer such that cur is near or beyond end; the TEE_MemMove at line 119 then reads past the buffer, leading to out-of-bounds read and potential crash or disclosure of adjacent TA memory.",
      "impact": "Information disclosure of TA memory or denial-of-service (panic) due to out-of-bounds read; possible further memory corruption depending on platform behavior."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before calling TEE_MemMove; validate pkcs11_ref.size without relying on post-copy values."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:107-109",
        "recommendation": "Validate head->attrs_size and ensure serialized blob length matches expectations before parsing."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove reads a fixed-size header from cur before any check ensuring cur+sizeof(header) <= end.",
        "There is an explicit panic if cur > end, but check occurs after the copy, not before."
      ],
      "negative_indicators": [
        "Loop contains a later check that panics if cur > end, indicating some runtime protection, but it is too late for the initial copy."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy reads a fixed number of bytes from an untrusted-derived buffer without pre-checking remaining length; this is a classic out-of-bounds read vulnerability (CWE-125) and memory-safety takes precedence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove copies sizeof(pkcs11_ref) from cur before verifying cur + sizeof(pkcs11_ref) <= end, allowing out-of-bounds read of serialized attributes."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "If cur > end then panic (Exceeding serial object length) — but this check occurs after the TEE_MemMove at line 119."
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "Callers generally validate overall structures (e.g., exp_pt/out_ref_size in processing.c:412-413), but head->attrs_size is used only to compute end and not checked before the initial header read."
    }
  ],
  "residual_risks": [
    "line 119: memory-safety classification suppresses potential information-disclosure classification for downstream uses of parsed sizes; if exploited for disclosure, unencrypted_output concerns may apply elsewhere."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size read from untrusted-derived buffer without pre-check.",
      "Post-copy panic check shows developer intended bounds checking but placed it after the read."
    ],
    "negative_indicators": [
      "Subsequent checks may detect malformed data and panic, reducing some impact but not preventing read-time issues."
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety (out-of-bounds read) is evident and unsanitized at the call site; report as vulnerable with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 150,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=found,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Function returns pointers/size values (attr_ptr/attr_size) that alias into attribute storage derived from REE data; downstream copies use these values for memmoves and must be bounds-checked.",
      "code_excerpt": "get_attribute_ptrs populates attr and attr_size arrays with pointers/sizes into serialized attributes."
    }
  ]
}
フロー #18: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keycheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 268.10秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: Serialized attributes buffer (head->attrs region) reachable from TA-managed object

シンク: TEE_MemMove reading header from potentially undersized remaining buffer

判定理由: The call performs a fixed-size read guarded only by cur < end; there is no explicit check that the full header fits in the remaining bytes, and the header's size field is trusted to advance the pointer, enabling out-of-bounds read or miscomputed offsets. Memory-safety concerns take precedence.

信頼度: MEDIUM

LLM対話履歴 (16 メッセージ)

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1215, 1243]:
-- Call #1 at line 1215 --
1213:
1214:
1215: >>> rc = check_access_attrs_against_token(session,
1216: wrapping_key->attributes);
1217: if (rc)
-- Call #2 at line 1243 --
1241: }
1242:
1243: >>> rc = check_access_attrs_against_token(session, key->attributes);
1244: if (rc)
1245: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: { 1552: bool private = true; 1553: 1554: switch (get_class(head)) { 1555: case PKCS11_CKO_SECRET_KEY: 1556: case PKCS11_CKO_PRIVATE_KEY: 1557: case PKCS11_CKO_PUBLIC_KEY: 1558: case PKCS11_CKO_DATA: 1559: case PKCS11_CKO_CERTIFICATE: 1560: private = object_is_private(head); 1561: break; 1562: default: 1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; 1564: } 1565: 1566: if (private && (pkcs11_session_is_public(session) || 1567: pkcs11_session_is_so(session))) { 1568: DMSG("Private object access from a public or SO session"); 1569: 1570: return PKCS11_CKR_USER_NOT_LOGGED_IN; 1571: } 1572: 1573: return PKCS11_CKR_OK; 1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_access_attrs_against_token", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_access_attrs_against_token", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head) -> sets whether object is private",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560-1561"
      },
      {
        "lhs": "switch_case",
        "rhs": "get_class(head) used to choose handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564"
      },
      {
        "lhs": "return",
        "rhs": "pkcs11_session_is_public(session) || pkcs11_session_is_so(session) used to decide access denial",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564",
        "evidence": "switch on get_class(head) with default returning error"
      },
      {
        "kind": "access_control_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571",
        "evidence": "if private && session is public/SO -> return USER_NOT_LOGGED_IN"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1215,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter is alias of session variable from caller; origin is TA-resolved session (derived from serialargs), treated as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, wrapping_key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1215,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases wrapping_key->attributes (TA object attributes), origin TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, wrapping_key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1243,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter is alias of caller session variable (TA-resolved), treated as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1243,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases key->attributes; may contain secret-related attrs (key), treated as TEE-private and sensitive.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, key->attributes);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "return"
    ],
    "propagation": [
      {
        "lhs": "return",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided object attributes (attributes originate from TA object), treated as TEE-private and may contain private flag.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "private = object_is_private(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return",
        "rhs": "bbool when rc == PKCS11_CKR_OK; false when rc == PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "not_found_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "If get_attribute returns PKCS11_RV_NOT_FOUND the function returns false"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) ensures caller expectation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller object attributes (origin TEE-private); attribute access reads TA-owned attributes which may be sensitive (private flag).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "rc",
        "rhs": "result of get_attribute_ptr(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copies from attr_ptr to attr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size after successful copy or set to required size when too small",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then *attr_size = size and return PKCS11_CKR_BUFFER_TOO_SMALL"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "get_attribute_ptr return is checked and returned on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller object attributes (origin TA object store), treated as TEE-private and may contain sensitive attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter points to caller stack buffer (&bbool), origin is TA stack (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size (initially sizeof(bbool))"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter points to caller stack variable (&size); used for bounds-checking and updated by callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Internal copy: TEE_MemMove(attr, attr_ptr, size) moves attribute bytes from stored attribute pointer into caller buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count) populates attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "attr_size",
        "rhs": "get_attribute_ptrs(...) populates attr_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "derived from get_attribute_ptrs result and count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "existence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "If count == 0 return NOT_FOUND; if count != 1 return GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller object attributes (origin TA object store), treated as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter is written by callee to point into stored attribute memory (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is updated by callee with attribute size for bounds checks; originates on caller stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs) (start of serialized attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size (end of attributes region)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header at cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (advance to next attribute)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into serialized attribute payload)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-135"
      },
      {
        "lhs": "*attr_size_ptr (when set)",
        "rhs": "pkcs11_ref.size (size of found attribute)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "Loop condition cur < end ensures iteration stops before end; checks found == max_found to stop early"
      },
      {
        "kind": "post_loop_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end panic (TEE_Panic) to detect exceeding serial length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases caller object attributes (serialized buffer) and is treated as TEE-private memory region.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Writes pointers into caller-provided 'attr' array pointing into serialized attribute payload (exposes TEE-private addresses/content to caller context within TA flow).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void*),src_sz=pkcs11_ref.size,dst_sz=*count (max_found)"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur and uses pkcs11_ref.size to compute next_off without explicit overflow/malformed-field protection; malformed size could flow to next_off and loop control.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If cur advances past end the code TEE_Panic(0) (hard failure) is invoked; this is a defensive check but results in panic rather than graceful error handling.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' in caller is read and updated to number of found matches; binding exposes found result back to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(size_t),src_sz=sizeof(size_t),dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "*count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "bytes copied from src via TEE_MemMove(dest, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [
      {
        "kind": "size_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers often check/adjust buffer length via attr_size before calling memmove (caller-side bounds checks present in some call paths)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest parameter (&pkcs11_ref) is a caller stack object (TA-private) receiving bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: src parameter (cur) points into serialized attributes buffer from 'head' (TA-owned serialized region).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header at cur into pkcs11_ref and then uses pkcs11_ref.size to compute next_off; malformed or attacker-controlled sizes in serialized data can cause logic errors.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads a fixed-size header from cur while loop only checks cur < end; sizeof(pkcs11_ref) may overrun if remaining bytes < header size and pkcs11_ref.size is subsequently trusted to compute next_off.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "Serialized attributes buffer (head->attrs region) reachable from TA-managed object",
      "propagation_path": [
        "cur <- (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header @ ...:119",
        "pkcs11_ref.size -> next_off used to advance cur and influence subsequent reads @ ...:120"
      ],
      "sink": "TEE_MemMove reading header from potentially undersized remaining buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed or truncated serialized attribute blob such that end - cur < sizeof(pkcs11_ref)",
        "Attacker-controlled or corrupted attribute content accessible to TA (e.g., via serialised input)"
      ],
      "attack_scenario": "Provide or trigger a serialized object whose attrs_size or content causes cur to point near end so that the fixed-size header read overruns the intended buffer, causing out-of-bounds read and/or miscomputed next_off leading to further memory corruption or panic.",
      "impact": "Out-of-bounds read (possible information leak) or corrupted loop state leading to TEE_Panic/denial-of-service or further memory-safety issues."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (end - cur) >= sizeof(pkcs11_ref) before calling TEE_MemMove to read the header; validate pkcs11_ref.size against remaining buffer and enforce a sane maximum."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Sanity-check pkcs11_ref.size (e.g., against head->attrs_size and a maximum) before using it to compute next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct fixed-size read (sizeof(pkcs11_ref)) from cur with only cur < end loop condition",
        "Subsequent use of pkcs11_ref.size to compute offsets without extra validation"
      ],
      "negative_indicators": [
        "Loop has cur < end condition and later post-loop panic if cur > end (some defensive checks exist)",
        "Higher-level callers sometimes validate sizes (but not here before header read)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The call performs a fixed-size read guarded only by cur < end; there is no explicit check that the full header fits in the remaining bytes, and the header's size field is trusted to advance the pointer, enabling out-of-bounds read or miscomputed offsets. Memory-safety concerns take precedence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads fixed-size pkcs11_attribute_head from cur without ensuring remaining buffer >= header size; pkcs11_ref.size then used without robust validation."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-116",
      "evidence": "loop condition cur < end ensures iteration stops before end"
    },
    {
      "type": "post_loop_check",
      "location": "get_attribute_ptrs:145-147",
      "evidence": "if (cur > end) TEE_Panic(0) (defensive failure)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "originates from TA object store and is TEE-private",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety classification suppresses information-disclosure classification: header/content may be sensitive (attributes/key metadata) and malformed inputs could also lead to disclosure if later copied to REE."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size read and subsequent use of size field without explicit remaining-byte check"
    ],
    "negative_indicators": [
      "Loop and panic provide some defensive checks but do not prevent the immediate header read overrun"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety issue (possible out-of-bounds read / corrupted loop progression) is present at this fixed-size TEE_MemMove call because remaining-buffer size is not checked before the read; this has medium-confidence exploitability and should be fixed by explicit bounds and range checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void*),src_sz=pkcs11_ref.size,dst_sz=*count (max_found)"
        ]
      },
      "why": "Writes pointers into caller-provided attr array pointing into serialized payload; relies on pkcs11_ref.size and offsets computed earlier.",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "If parsing overruns end the code calls TEE_Panic(0), which is a hard failure rather than graceful handling.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Wrapped key bytes (sensitive) are written into params[2].memref.buffer (REE) with out_size derived from caller buffer size; potential secret→REE flow if sanitization absent.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #19: TA_InvokeCommandEntryPoint -> entry_create_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_create_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 237.82秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided serialized object buffer (e.g., params ctrl->memref.buffer / serialized template)

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading header from parsed buffer

判定理由: This is primarily a memory-safety issue (out-of-bounds read) because the code reads a header-sized chunk without ensuring the full header lies within the declared attrs_size; memory-safety rules take precedence and mark the line vulnerable.

信頼度: HIGH

LLM対話履歴 (16 メッセージ)

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_create_object at lines [368, 447, 616, 792, 957, 1028, 1144]:
-- Call #1 at line 368 --
366: goto out;
367:
368: >>> rc = check_access_attrs_against_token(session, head);
369: if (rc)
370: goto out;
-- Call #2 at line 447 --
445: * Only public objects can be destroyed unless normal user is logged in
446: */
447: >>> rc = check_access_attrs_against_token(session, object->attributes);
448: if (rc)
449: return PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #3 at line 616 --
614:
615: if (!obj->attributes ||
616: >>> check_access_attrs_against_token(session,
617: obj->attributes) ||
618: !attributes_match_reference(obj->attributes, req_attrs)) { -- Call #4 at line 792 -- 790: }
791:
792: >>> rc = check_access_attrs_against_token(session, obj->attributes);
793:     	if (rc) {
794:     		rc = PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #5 at line 957 --
955:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
956:     
957: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
958:     	if (rc)
959:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #6 at line 1028 --
1026:     	 * Only public objects can be modified unless normal user is logged in
1027:     	 */
1028: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1029:     	if (rc) {
1030:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #7 at line 1144 --
1142:     	 * Only public objects can be modified unless normal user is logged in
1143:     	 */
1144: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560"
      },
      {
        "lhs": "switch(get_class(head))",
        "rhs": "head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1549-1554"
      },
      {
        "lhs": "decision to return PKCS11_CKR_USER_NOT_LOGGED_IN",
        "rhs": "private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1549-1564",
        "evidence": "get_class(head) checked and default returns error for unknown class"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 368,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: callee 'session' parameter aliases caller's session pointer; session is a TA-side session object (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 368,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin may be REE-provided template or TA-owned object attributes (ambiguous).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, head);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(...)",
      "return"
    ],
    "propagation": [
      {
        "lhs": "return",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      },
      {
        "lhs": "get_bool(...)",
        "rhs": "head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1526-1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin (REE vs TA) is ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "private = object_is_private(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "get_attribute(...) result",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "return",
        "rhs": "bbool (or false if not found)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "returns false on PKCS11_RV_NOT_FOUND and asserts rc == PKCS11_CKR_OK otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller's attributes pointer; origin (REE-shared template vs TA-owned attributes) is ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-183"
      },
      {
        "lhs": "attr (written)",
        "rhs": "attr_ptr via TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "attr_size (final)",
        "rhs": "*attr_size = size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "error_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "returns error if get_attribute_ptr() fails"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin (REE vs TA) ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' (destination buffer) aliases caller buffer (&bbool in callers like get_bool) which may be TA-private or caller-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; destination origin may be REE-visible leading to shared-write risk.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "1 (initialized)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return",
        "rhs": "PKCS11_RV_NOT_FOUND if !count, PKCS11_CKR_GENERAL_ERROR if count != 1, else OK",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "checks count after get_attribute_ptrs and returns errors for 0 or >1 results"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin may be REE-supplied template or TA-owned attributes (ambiguous).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' (output pointer) aliases caller-provided pointer variable (&attr_ptr); caller local is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller's size variable (&size); caller-owned scalar is TA-private and used for bounds decisions.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "found",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "memory at cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr (output) entries",
        "rhs": "if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref) else *attr_ptr++ = NULL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-134"
      },
      {
        "lhs": "*count",
        "rhs": "found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop iterates while cur < end and advances by next_off derived from parsed size fields"
      },
      {
        "kind": "panic_on_overflow",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attributes pointer; origin may be REE-supplied or TA-owned (ambiguous).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' parameter (void **attr) aliases caller's output pointer variable; pointers stored point into parsed object buffer derived from 'head'.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller size pointer; sizes written come from parsed pkcs11_ref.size fields (input-driven).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'count' parameter aliases caller-provided count variable; function updates *count based on found matches.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src, len bytes copied into dest",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from buffer 'cur' (parsed from head, possibly REE-originated) into local structure via TEE_MemMove; source origin ambiguous and copy length is derived from fixed sizeof destination.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) from 'cur' where loop only checks cur < end but does not ensure cur + sizeof(pkcs11_ref) <= end, allowing an out-of-bounds read driven by attacker-controlled size fields.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided serialized object buffer (e.g., params ctrl->memref.buffer / serialized template)",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> params (REE-visible) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:206",
        "entry_create_object reads ctrl->memref.buffer into serialargs -> template @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:325-333",
        "template -> head passed into get_attribute_ptrs via get_attribute_ptr -> get_attribute_ptrs @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158",
        "cur/end computed from head->attrs_size and then TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-119"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading header from parsed buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or forges serialized object contents or attrs_size in head",
        "No prior validation ensuring cur + sizeof(pkcs11_ref) <= end"
      ],
      "attack_scenario": "A maliciously crafted serialized attributes blob sets attrs_size and internal offsets such that cur points near end, causing TEE_MemMove to read past end and trigger an out-of-bounds read (potentially causing panic or exposing adjacent memory).",
      "impact": "Out-of-bounds read may lead to information disclosure of adjacent TA memory or cause panic/denial-of-service; may aid further exploitation."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure before each TEE_MemMove that (cur + sizeof(pkcs11_ref)) <= end and similarly validate next_off derived from pkcs11_ref.size does not cause overflow; reject malformed attrs_size."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size against remaining buffer and reasonable limits before using it to advance cur."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Replace TEE_Panic with graceful error return when encountering malformed serialized input to avoid denial-of-service or uncontrolled termination paths."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition uses cur < end but no check for cur + sizeof(pkcs11_ref) <= end before the read",
        "len/size fields parsed from untrusted buffer used to compute offsets (next_off = sizeof(pkcs11_ref) + pkcs11_ref.size)",
        "There is an explicit overflow/panic check after the loop indicating the authors worried about malformed lengths but it's too late for the initial read"
      ],
      "negative_indicators": [
        "There is a check later (cur > end) that triggers panic if overrun is detected, indicating some defensive code exists (but it's after the read)",
        "TEE_MemMove destination is a local structure (pkcs11_ref) reducing immediate REE-exfiltration at this exact read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "This is primarily a memory-safety issue (out-of-bounds read) because the code reads a header-sized chunk without ensuring the full header lies within the declared attrs_size; memory-safety rules take precedence and mark the line vulnerable.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads sizeof(pkcs11_ref) from cur without ensuring the full header fits within end (cur + sizeof(pkcs11_ref) not checked)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop condition 'for (; cur < end; cur += next_off)' iterates within end; however it does not prevent reading header-sized data at tail."
    },
    {
      "type": "panic_on_overflow",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:321-323 (ptypes/out size checks) but attrs_size inside head is not fully trusted"
    }
  ],
  "residual_risks": [
    "Line-level memory-safety classification suppresses potential information-disclosure classification for later copies (e.g., attributes copied into caller buffers via TEE_MemMove in get_attribute) which may still allow secrets to reach REE."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct missing boundary check before copying header-sized struct",
      "Input-driven size arithmetic used to advance pointers"
    ],
    "negative_indicators": [
      "Subsequent panic-on-overflow exists but is after the vulnerable read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Marked vulnerable due to clear out-of-bounds read possibility; memory-safety issue is concrete and precedes other classes.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute bytes from attr_ptr into caller-provided buffer via TEE_MemMove; destination may be caller-controlled REE-visible buffer leading to possible info disclosure later.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (MEMREF_OUTPUT) — structural risk of writing into shared buffer.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #20: TA_InvokeCommandEntryPoint -> entry_destroy_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_destroy_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 224.53秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: serialized attribute buffer inside struct obj_attrs (head->attrs area) — content ultimately influenced when objects are created/initialized

シンク: TEE_MemMove copying sizeof(pkcs11_ref) bytes from cur into stack-local pkcs11_ref

判定理由: This is primarily a memory-safety issue (insufficient bounds validation before copying a fixed-size header), which can be triggered by malformed attribute data; that makes the line vulnerable even though destination is TA-local.

信頼度: MEDIUM

LLM対話履歴 (18 メッセージ)

関数: entry_destroy_object
プロンプト 中間 (entry_destroy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_destroy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [209]:
-- Call #1 at line 209 --
207: break;
208: case PKCS11_CMD_DESTROY_OBJECT:
209: >>> rc = entry_destroy_object(client, ptypes, params);
210: break;
211:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

403: enum pkcs11_rc entry_destroy_object(struct pkcs11_client *client,
404: uint32_t ptypes, TEE_Param *params)
405: { 406: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 407: TEE_PARAM_TYPE_NONE, 408: TEE_PARAM_TYPE_NONE, 409: TEE_PARAM_TYPE_NONE); 410: enum pkcs11_rc rc = PKCS11_CKR_OK; 411: TEE_Param *ctrl = params; 412: struct serialargs ctrlargs = { }; 413: uint32_t object_handle = 0; 414: struct pkcs11_session *session = NULL; 415: struct pkcs11_object *object = NULL; 416: 417: if (!client || ptypes != exp_pt) 418: return PKCS11_CKR_ARGUMENTS_BAD; 419: 420: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 421: 422: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 423: if (rc) 424: return rc; 425: 426: rc = serialargs_get_u32(&ctrlargs, &object_handle); 427: if (rc) 428: return rc; 429: 430: if (serialargs_remaining_bytes(&ctrlargs)) 431: return PKCS11_CKR_ARGUMENTS_BAD; 432: 433: object = pkcs11_handle2object(object_handle, session); 434: if (!object) 435: return PKCS11_CKR_OBJECT_HANDLE_INVALID; 436: 437: 438: if (get_bool(object->attributes, PKCS11_CKA_TOKEN) && 439: !pkcs11_session_is_read_write(session)) { 440: DMSG("Can't destroy persistent object"); 441: return PKCS11_CKR_SESSION_READ_ONLY; 442: } 443: 444: 447: rc = check_access_attrs_against_token(session, object->attributes); 448: if (rc) 449: return PKCS11_CKR_USER_NOT_LOGGED_IN; 450: 451: 452: if (!get_bool(object->attributes, PKCS11_CKA_DESTROYABLE)) 453: return PKCS11_CKR_ACTION_PROHIBITED; 454: 455: destroy_object(session, object, false); 456: 457: DMSG("PKCS11 session %"PRIu32": destroy object %#"PRIx32, 458: session->handle, object_handle); 459: 460: return rc; 461: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_destroy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_destroy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_destroy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_destroy_object",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "object_handle",
      "session",
      "object"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:411-412"
      },
      {
        "lhs": "ctrlargs (buffer/size)",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:420"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:422"
      },
      {
        "lhs": "object_handle",
        "rhs": "serialargs_get_u32(&ctrlargs, &object_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:426"
      },
      {
        "lhs": "object",
        "rhs": "pkcs11_handle2object(object_handle, session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:433-435"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:406-409,417-418",
        "evidence": "ptypes must equal expected TEE_PARAM_TYPES; function returns on mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:430-431",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked to ensure no extra bytes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 209,
      "function": "entry_destroy_object",
      "rule": "other",
      "why": "Binding callee parameter 'client' to caller-derived client (originates from tee_session); origin is caller-provided and not proven TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_destroy_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 209,
      "function": "entry_destroy_object",
      "rule": "other",
      "why": "Binding callee parameter 'params' to caller memref array; params->memref.buffer is REE-visible (shared) and passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_destroy_object(client, ptypes, params);"
    }
  ]
}

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_destroy_object at lines [447, 616, 792, 957, 1028, 1144]:
-- Call #1 at line 447 --
445: * Only public objects can be destroyed unless normal user is logged in
446: */
447: >>> rc = check_access_attrs_against_token(session, object->attributes);
448: if (rc)
449: return PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #2 at line 616 --
614:
615: if (!obj->attributes ||
616: >>> check_access_attrs_against_token(session,
617: obj->attributes) ||
618: !attributes_match_reference(obj->attributes, req_attrs)) { -- Call #3 at line 792 -- 790: }
791:
792: >>> rc = check_access_attrs_against_token(session, obj->attributes);
793:     	if (rc) {
794:     		rc = PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #4 at line 957 --
955:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
956:     
957: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
958:     	if (rc)
959:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #5 at line 1028 --
1026:     	 * Only public objects can be modified unless normal user is logged in
1027:     	 */
1028: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1029:     	if (rc) {
1030:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #6 at line 1144 --
1142:     	 * Only public objects can be modified unless normal user is logged in
1143:     	 */
1144: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1559-1561"
      },
      {
        "lhs": "switch(get_class(head))",
        "rhs": "get_class(head) determines object class and controls path",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564"
      },
      {
        "lhs": "return PKCS11_CKR_USER_NOT_LOGGED_IN",
        "rhs": "private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564",
        "evidence": "switch on get_class(head) with default returning error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 447,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding callee 'session' parameter to caller session (derived in TA); origin is TA-internal but provenance from caller; treated as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, object->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 447,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding callee 'head' parameter to caller object->attributes; attributes are TA-owned object metadata (treated as TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, object->attributes);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(...)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1526,
      "function": "object_is_private",
      "rule": "other",
      "why": "Binding callee 'head' to caller-provided object attributes; attributes originate from TA object metadata (treated as TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "bool object_is_private(struct obj_attrs *head) { return get_bool(head, PKCS11_CKA_PRIVATE); }"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return value)",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "function return",
        "rhs": "false if rc == PKCS11_RV_NOT_FOUND else bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "Returns false on PKCS11_RV_NOT_FOUND and asserts rc == PKCS11_CKR_OK before using bbool"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 233,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding callee parameter 'head' to caller-provided object attributes; attributes are TA-managed metadata (treated as TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "bool get_bool(struct obj_attrs *head, uint32_t attribute) { enum pkcs11_rc rc = PKCS11_CKR_OK; uint8_t bbool = 0; uint32_t size = sizeof(bbool); rc = get_attribute(head, attribute, &bbool, &size); if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK); return bbool; }"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size (when attr_size non-NULL)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-183,189-190"
      },
      {
        "lhs": "attr (buffer contents)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copying from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then set *attr_size=size and return BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee 'head' to caller-provided object attributes; attributes are TA-managed metadata (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee 'attr' to caller buffer (e.g., &bbool in callers); attr is written via TEE_MemMove from attr_ptr.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding callee 'attr_size' to caller pointer (e.g., &size in callers); used for bounds check and updated on return.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs call result via count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks that count != 0 and count == 1, returning NOT_FOUND or GENERAL_ERROR otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee 'head' to caller-provided object attributes; attributes are TA-managed metadata (treated as TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee 'attr_ptr' to caller pointer; attr_ptr is set to point into attribute storage (TEE-private) and later used by callers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding callee 'attr_size' to caller pointer; attr_size is updated with attribute size and used for bounds checks by callers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "found",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "(char *)head + sizeof(struct obj_attrs) and cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr and attr_size_ptr elements",
        "rhs": "set to cur + sizeof(pkcs11_ref) and pkcs11_ref.size when matching attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count (out)",
        "rhs": "found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-122,145-148",
        "evidence": "Loop iterates while cur < end and code panics if cur > end to prevent overruns"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee 'head' to caller-provided object attributes; head is used for pointer arithmetic into internal attribute storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs); char *end = cur + head->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee 'attr' (void **attr) to caller pointer; attr entries are set to point inside serialized object (TEE-private) and later used by callers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee 'attr_size' to caller pointer; attr_size entries are written with pkcs11_ref.size for caller consumption.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=pkcs11_ref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding callee 'count' to caller pointer; count is used to limit results and returns number found to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "size_t max_found = *count; ... *count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest (memory)",
        "rhs": "bytes copied from src by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "src (memory)",
        "rhs": "origin pointer provided to TEE_MemMove (e.g., cur in callers)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "len",
        "rhs": "size argument passed to TEE_MemMove (e.g., sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &pkcs11_ref is a TA stack/local structure (TEE-private) being written by memmove from a pointer into serialized object data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size+sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'cur' points inside serialized attributes buffer derived from head; origin is TA-managed serialized object storage (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Caller-provided buffer 'attr' (could be caller stack or caller-supplied) is written from attr_ptr via TEE_MemMove; origin of attr in callers varies.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) from cur which is advanced by attacker-influenced pkcs11_ref.size; loop only checks cur < end, allowing a read where cur + sizeof(pkcs11_ref) > end (insufficient bounds check).",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "serialized attribute buffer inside struct obj_attrs (head->attrs area) — content ultimately influenced when objects are created/initialized",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> params -> object creation paths (caller-supplied) @ entry points (various)",
        "object->attributes (obj metadata) read as head in get_attribute_ptrs @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-119",
        "cur pointer derived from head + sizeof(struct obj_attrs) and used as source in TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove copying sizeof(pkcs11_ref) bytes from cur into stack-local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A crafted or corrupted serialized attributes region where head->attrs_size or embedded pkcs11_ref.size cause cur + sizeof(pkcs11_ref) to exceed end",
        "Ability to influence the serialized object contents (e.g., during object creation or via REE-provided memrefs earlier in lifecycle)"
      ],
      "attack_scenario": "An attacker supplies or manipulates serialized attribute bytes such that the memmove reads past the declared attribute region, causing out-of-bounds read from adjacent memory or triggering TEE_Panic later; this may lead to information disclosure or denial-of-service.",
      "impact": "Out-of-bounds read leading to potential information disclosure of adjacent memory or panic/DoS of the TA."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before invoking TEE_MemMove; validate pkcs11_ref.size and reject entries that would cause next_off to exceed remaining buffer."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size against a reasonable maximum and that next_off does not wrap/overflow."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur in TEE_MemMove without explicit cur+sizeof(...) <= end check",
        "Later code panics if cur > end, indicating bounds concerns but checked too late"
      ],
      "negative_indicators": [
        "Loop condition cur < end prevents some out-of-range reads but is insufficient for fixed-size header read",
        "head->attrs_size originates from TA structures (not obviously direct REE memref at this site) which lowers certainty about attacker control"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "This is primarily a memory-safety issue (insufficient bounds validation before copying a fixed-size header), which can be triggered by malformed attribute data; that makes the line vulnerable even though destination is TA-local.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads fixed-size header from cur without ensuring sizeof(pkcs11_ref) bytes remain in buffer (cur + sizeof(pkcs11_ref) <= end missing)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-122",
      "evidence": "Loop condition uses cur < end and code panics if cur > end; however this does not guarantee sizeof(pkcs11_ref) bytes are available before the TEE_MemMove at line 119."
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially safe",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108 (attrs_size used to compute end)"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses but does not eliminate potential information-disclosure classification (unencrypted_output) because dst is TEE-private; if serialized data originates from REE earlier, higher-level flows may expose secrets."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size read (sizeof(pkcs11_ref)) from a cursor checked only with cur < end",
      "No explicit check cur + sizeof(pkcs11_ref) <= end before the memmove"
    ],
    "negative_indicators": [
      "head->attrs_size bounds the loop and may limit exposure depending on how head is constructed",
      "Some callers build head from TA-managed structures, reducing direct REE control at this exact point"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety (insufficient bounds checks) is evident at the memmove site; this takes precedence and marks the line vulnerable under weak input validation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs))),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "TEE_MemMove reads a fixed-size header from cur without confirming that sizeof(pkcs11_ref) bytes remain in the serialized attributes buffer; next_off is computed from the unvalidated pkcs11_ref.size, risking over-read.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}
フロー #21: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_get_attribute_valuecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 253.74秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided serialized attribute blob (ctrl->memref.buffer) used to build 'template'

シンク: TEE_MemMove copying into local pkcs11_ref structure

判定理由: Memory-safety weakness (insufficient bounds validation before fixed-size copy) precedes any information-disclosure concerns; given REE-derived input builds the source buffer, the copy at line 119 can read beyond the intended buffer and drive incorrect control flow or panic.

信頼度: HIGH

LLM対話履歴 (18 メッセージ)

関数: entry_get_attribute_value
プロンプト 中間 (entry_get_attribute_value)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_get_attribute_value” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [301]:
-- Call #1 at line 301 --
299: break;
300: case PKCS11_CMD_GET_ATTRIBUTE_VALUE:
301: >>> rc = entry_get_attribute_value(client, ptypes, params);
302: break;
303: case PKCS11_CMD_GET_OBJECT_SIZE:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

742: enum pkcs11_rc entry_get_attribute_value(struct pkcs11_client *client,
743: uint32_t ptypes, TEE_Param *params)
744: { 745: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 746: TEE_PARAM_TYPE_NONE, 747: TEE_PARAM_TYPE_MEMREF_OUTPUT, 748: TEE_PARAM_TYPE_NONE); 749: TEE_Param *ctrl = params; 750: TEE_Param *out = params + 2; 751: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 752: struct serialargs ctrlargs = { }; 753: struct pkcs11_session *session = NULL; 754: struct pkcs11_object_head *template = NULL; 755: struct pkcs11_object *obj = NULL; 756: uint32_t object_handle = 0; 757: char *cur = NULL; 758: size_t len = 0; 759: char *end = NULL; 760: bool attr_sensitive = 0; 761: bool attr_type_invalid = 0; 762: bool buffer_too_small = 0; 763: 764: if (!client || ptypes != exp_pt) 765: return PKCS11_CKR_ARGUMENTS_BAD; 766: 767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 768: 769: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 770: if (rc) 771: return rc; 772: 773: rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)); 774: if (rc) 775: return rc; 776: 777: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 778: if (rc) 779: return rc; 780: 781: if (serialargs_remaining_bytes(&ctrlargs)) { 782: rc = PKCS11_CKR_ARGUMENTS_BAD; 783: goto out; 784: } 785: 786: obj = pkcs11_handle2object(object_handle, session); 787: if (!obj) { 788: rc = PKCS11_CKR_OBJECT_HANDLE_INVALID; 789: goto out; 790: } 791: 792: rc = check_access_attrs_against_token(session, obj->attributes); 793: if (rc) { 794: rc = PKCS11_CKR_OBJECT_HANDLE_INVALID; 795: goto out; 796: } 797: 798: 799: 823: cur = (char *)template + sizeof(struct pkcs11_object_head); 824: end = cur + template->attrs_size; 825: 826: for (; cur < end; cur += len) { 827: struct pkcs11_attribute_head *cli_ref = (void *)cur; 828: struct pkcs11_attribute_head cli_head = { }; 829: void *data_ptr = NULL; 830: 831: 832: TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head)); 833: 834: len = sizeof(*cli_ref) + cli_head.size; 835: 836: 837: if (attribute_is_hidden(&cli_head)) { 838: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 839: TEE_MemMove(&cli_ref->size, &cli_head.size, 840: sizeof(cli_head.size)); 841: attr_type_invalid = 1; 842: continue; 843: } 844: 845: 846: if (pkcs11_attr_has_indirect_attributes(cli_head.id)) { 847: attr_type_invalid = 1; 848: continue; 849: } 850: 851: 852: if (!attribute_is_exportable(&cli_head, obj)) { 853: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 854: TEE_MemMove(&cli_ref->size, &cli_head.size, 855: sizeof(cli_head.size)); 856: attr_sensitive = 1; 857: continue; 858: } 859: 860: 861: data_ptr = cli_head.size ? cli_ref->data : NULL; 862: 863: 867: rc = get_attribute(obj->attributes, cli_head.id, data_ptr, 868: &cli_head.size); 869: 870: switch (rc) { 871: case PKCS11_CKR_OK: 872: break; 873: case PKCS11_RV_NOT_FOUND: 874: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 875: attr_type_invalid = 1; 876: break; 877: case PKCS11_CKR_BUFFER_TOO_SMALL: 878: if (data_ptr) 879: buffer_too_small = 1; 880: break; 881: default: 882: rc = PKCS11_CKR_GENERAL_ERROR; 883: goto out; 884: } 885: 886: TEE_MemMove(&cli_ref->size, &cli_head.size, 887: sizeof(cli_head.size)); 888: } 889: 890: 900: 901: rc = PKCS11_CKR_OK; 902: if (attr_sensitive) 903: rc = PKCS11_CKR_ATTRIBUTE_SENSITIVE; 904: if (attr_type_invalid) 905: rc = PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 906: if (buffer_too_small) 907: rc = PKCS11_CKR_BUFFER_TOO_SMALL; 908: 909: 910: TEE_MemMove(out->memref.buffer, template, out->memref.size); 911: 912: DMSG("PKCS11 session %"PRIu32": get attributes %#"PRIx32, 913: session->handle, object_handle); 914: 915: out: 916: TEE_Free(template); 917: 918: return rc; 919: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_get_attribute_value", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_get_attribute_value", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_get_attribute_value)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_get_attribute_value",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "template",
      "template->attrs_size",
      "out->memref.buffer",
      "out->memref.size",
      "cli_ref",
      "cli_head"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:749"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:750"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:777-779"
      },
      {
        "lhs": "cur,end",
        "rhs": "template + template->attrs_size bounds",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:823-825"
      },
      {
        "lhs": "cli_head",
        "rhs": "contents at cli_ref (within template) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832"
      },
      {
        "lhs": "cli_ref->size",
        "rhs": "cli_head.size then TEE_MemMove back into template",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:886-887"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "template (copied out)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:910"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:745-748,764-765",
        "evidence": "ptypes == exp_pt check"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:781-784",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) validated"
      },
      {
        "kind": "access_control",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:792-796",
        "evidence": "check_access_attrs_against_token(...) result enforced"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 301,
      "function": "entry_get_attribute_value",
      "rule": "other",
      "why": "Binding: caller's client pointer (originating from TA_InvokeCommandEntryPoint) is passed into callee parameter; origin region uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client)"
        ]
      },
      "code_excerpt": "rc = entry_get_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 301,
      "function": "entry_get_attribute_value",
      "rule": "other",
      "why": "Binding: caller's params (TEE_Param array from REE) is passed into callee; params contain REE-visible memrefs (shared).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_get_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "rule": "other",
      "why": "Copies 'template' (TA-side object describing attributes, may include sensitive attributes flagged earlier) into out->memref.buffer (REE-visible), potentially exposing attributes.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [792, 957, 1028, 1144]:
-- Call #1 at line 792 --
790: }
791:
792: >>> rc = check_access_attrs_against_token(session, obj->attributes);
793:     	if (rc) {
794:     		rc = PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #2 at line 957 --
955:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
956:     
957: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
958:     	if (rc)
959:     		return PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #3 at line 1028 --
1026:     	 * Only public objects can be modified unless normal user is logged in
1027:     	 */
1028: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1029:     	if (rc) {
1030:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #4 at line 1144 --
1142:     	 * Only public objects can be modified unless normal user is logged in
1143:     	 */
1144: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private",
      "get_class(head)"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "true (initial)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1552"
      },
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560"
      },
      {
        "lhs": "return value",
        "rhs": "pkcs11_session_is_public(session) || pkcs11_session_is_so(session) when private",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564",
        "evidence": "switch(get_class(head)) ensures only known object classes are handled; default returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 792,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding: session pointer (from caller) passed into callee parameter; origin is caller-managed (session derived from REE-provided handle) so region is uncertain/tainted.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct pkcs11_session),dst_sz=sizeof(struct pkcs11_session)"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 792,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Binding: object attributes pointer (obj->attributes) passed into callee; attributes are TA-side object metadata (TA-private) but originate from object storage—mark origin TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(head, PKCS11_CKA_PRIVATE)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1526-1529"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "Binding: caller passes obj->attributes into object_is_private; attributes originate from TA object storage but ultimately reflect REE-driven object creation—origin marked TEE-private/unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "private = object_is_private(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return)",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:235-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "input_absence_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "if (rc == PKCS11_RV_NOT_FOUND) return false;"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) enforces expected success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding: caller passes obj attrs pointer into get_bool; origin of attributes is TA object storage (TEE-private) though ultimately influenced by REE-driven operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding: get_attribute reads into &bbool and &size (local TA buffers) using head pointer; head origin may be TA-private but contents reflect object metadata.",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size assigned from get_attribute_ptr and possibly propagated to *attr_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-182,189-190"
      },
      {
        "lhs": "attr (target buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) writes attr from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: caller-provided head pointer (obj attributes) passed into get_attribute; origin is TA object metadata possibly influenced by REE operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: caller passes &bbool as attr (destination buffer) into get_attribute; destination is a local TA buffer (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: caller passes &size as attr_size into get_attribute; this influences bounds check and may be set to required size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "TEE_MemMove copies attribute data from attr_ptr (object storage) into caller buffer 'attr'; attr_ptr is TEE-side attribute storage, attr may be TA-local or caller-provided buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "1 (initial)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "result derived from get_attribute_ptrs and subsequent count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks that count != 0 and count == 1, returning NOT_FOUND or GENERAL_ERROR otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: caller-provided 'head' (object attributes) is passed in; origin is TA object metadata but may ultimately reflect REE-driven creation—mark origin TEE-private/unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: caller passes &attr_ptr to receive pointer into attribute storage; callee will write attr_ptr pointing into TA storage (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: caller passes &attr_size to receive attribute size; callee updates it and uses it in downstream bounds checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur,end",
        "rhs": "(char *)head + sizeof(struct obj_attrs) ; end = cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (derived from bytes copied from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "attr_ptr/attr_size_ptr increments",
        "rhs": "*attr_ptr++ = cur + sizeof(pkcs11_ref); *attr_size_ptr++ = pkcs11_ref.size when matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } detects overrun after loop"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: caller passes 'head' (object attributes) into get_attribute_ptrs; origin is TA object storage but may derive from REE-influenced creation—mark origin TEE-private/unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs)+head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: caller-provided attr (attr_ptr) receives pointers into 'head' storage; returned pointers alias TA-side attribute storage (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Loop advances by next_off derived from pkcs11_ref.size read from data in 'head' without validating next_off before use; malformed attrs_size or pkcs11_ref.size can cause logic errors or overrun.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size - (cur - ((char*)head+sizeof(struct obj_attrs)))"
        ]
      },
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst[*0..n-1]",
        "rhs": "src[*0..n-1] (copy of n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "dst[*0..n-1]",
        "rhs": "src[*0..n-1] (copy of n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "dst[*0..n-1]",
        "rhs": "src[*0..n-1] (copy of n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from 'cur' (within serialized object storage) into local pkcs11_ref structure; source derives from head->attrs_size data and could be malformed leading to incorrect next_off computation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size+sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute data from attr_ptr (object storage) into caller buffer 'attr'; destination is caller-provided and may vary (TA-local or caller-managed), affecting exposure.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into 'pre' which may be a logging buffer; source 'prefix' provenance is uncertain (could be REE-originated), so copy may move untrusted data into TA memory or vice versa depending on caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from 'cur' without ensuring cur+sizeof(pkcs11_ref) <= end; size field read from that copy is then used to compute next_off, enabling malformed data to cause over-read/logic errors.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided serialized attribute blob (ctrl->memref.buffer) used to build 'template'",
      "propagation_path": [
        "params (TEE_Param memref) -> serialargs_alloc_get_attributes -> template (file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:777-779)",
        "template -> get_attribute_ptrs: cur = (char*)template + sizeof(header) (file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107)",
        "get_attribute_ptrs -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119) [sink]"
      ],
      "sink": "TEE_MemMove copying into local pkcs11_ref structure"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or crafts the serialized attributes provided in ctrl->memref.buffer",
        "template->attrs_size is set such that cur < end but cur + sizeof(pkcs11_ref) may exceed end"
      ],
      "attack_scenario": "Malformed serialized attribute data causes the code to read beyond the intended buffer when copying the attribute header; this can trigger incorrect next_off, loop misbehavior, or panic, leading to denial of service or possible memory-safety issues.",
      "impact": "Medium: denial-of-service via TEE_Panic or logic corruption; in low-probability scenarios could lead to memory corruption depending on allocator/layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure before TEE_MemMove that cur + sizeof(pkcs11_ref) <= end; validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      },
      {
        "type": "input_validation",
        "location": "serialargs_alloc_get_attributes:777-779",
        "recommendation": "Validate serialized attribute blob lengths and structure when parsing from REE-provided memref to ensure attrs_size and contained sizes are consistent."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source of template is serialargs_alloc_get_attributes fed from REE memref (attacker-controlled)",
        "Loop uses cur < end but no pre-copy check that cur+sizeof(pkcs11_ref) <= end before TEE_MemMove",
        "pkcs11_ref.size from the copied header is subsequently used to compute next_off and advance the loop"
      ],
      "negative_indicators": [
        "There is a later check if (cur > end) that triggers TEE_Panic, which may limit silent exploitation but indicates denial-of-service",
        "Copies are into local structures (no direct REE output on this line)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety weakness (insufficient bounds validation before fixed-size copy) precedes any information-disclosure concerns; given REE-derived input builds the source buffer, the copy at line 119 can read beyond the intended buffer and drive incorrect control flow or panic.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Fixed-size copy from 'cur' performed without confirming enough remaining bytes; pkcs11_ref.size then used to advance loop, enabling over-read or malformed-length-driven behavior."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Contains serialized attributes derived from REE; not intrinsically safe—must be validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    },
    {
      "arg": "cur",
      "why_safe": "Used as iteration pointer but its advancement relies on sizes read from potentially untrusted data; current code lacks pre-copy bounds check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure classification for downstream copies that depend on structurally valid parsing; malformed input could still lead to attributes containing sensitive fields that are later copied to REE (e.g., at out copy), ensure end-to-end validation."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of missing pre-copy bound check at the sink",
      "Upstream template originates from REE-provided memref"
    ],
    "negative_indicators": [
      "Post-loop overrun check leads to TEE_Panic which may limit silent memory corruption"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The TEE_MemMove at line 119 performs a fixed-size read from a buffer derived from REE-controlled serialized data without confirming the header-sized read fits within remaining bytes; this is a clear weak input validation leading to memory-safety risk (over-read/logic corruption/DoS).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size - (cur - ((char*)head+sizeof(struct obj_attrs)))"
        ]
      },
      "why": "Loop advances by next_off computed from pkcs11_ref.size read from unvalidated data; malformed sizes can cause overruns or infinite loops.",
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "why": "Copies attribute data from attribute storage into caller buffer; downstream exposures possible if attributes contain sensitive values and are later copied to REE.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Final copy of template into out->memref.buffer (REE-visible) may expose attribute data if template contains sensitive attributes not filtered earlier.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}
フロー #22: TA_InvokeCommandEntryPoint -> entry_get_object_size -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_get_object_sizecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 298.62秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Serialized attribute blob inside obj->attributes (parsed from TA-managed serialized object)

シンク: TEE_MemMove reading header from potentially short/tainted buffer at cur

判定理由: This is primarily a memory-safety (out-of-bounds read/advance) issue: TEE_MemMove reads a fixed header size from a dynamically-sized serialized region without confirming remaining bytes, and the parsed size is then used to advance the cursor; insufficient input validation allows malformed data to drive unsafe memory operations.

信頼度: HIGH

LLM対話履歴 (18 メッセージ)

関数: entry_get_object_size
プロンプト 中間 (entry_get_object_size)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_get_object_size” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [304]:
-- Call #1 at line 304 --
302: break;
303: case PKCS11_CMD_GET_OBJECT_SIZE:
304: >>> rc = entry_get_object_size(client, ptypes, params);
305: break;
306: case PKCS11_CMD_SET_ATTRIBUTE_VALUE:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

921: enum pkcs11_rc entry_get_object_size(struct pkcs11_client *client,
922: uint32_t ptypes, TEE_Param *params)
923: { 924: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 925: TEE_PARAM_TYPE_NONE, 926: TEE_PARAM_TYPE_MEMREF_OUTPUT, 927: TEE_PARAM_TYPE_NONE); 928: TEE_Param *ctrl = params; 929: TEE_Param *out = params + 2; 930: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 931: struct serialargs ctrlargs = { }; 932: struct pkcs11_session *session = NULL; 933: uint32_t object_handle = 0; 934: struct pkcs11_object *obj = NULL; 935: uint32_t obj_size = 0; 936: 937: if (!client || ptypes != exp_pt) 938: return PKCS11_CKR_ARGUMENTS_BAD; 939: 940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 941: 942: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 943: if (rc) 944: return rc; 945: 946: rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)); 947: if (rc) 948: return rc; 949: 950: if (serialargs_remaining_bytes(&ctrlargs)) 951: return PKCS11_CKR_ARGUMENTS_BAD; 952: 953: obj = pkcs11_handle2object(object_handle, session); 954: if (!obj) 955: return PKCS11_CKR_OBJECT_HANDLE_INVALID; 956: 957: rc = check_access_attrs_against_token(session, obj->attributes); 958: if (rc) 959: return PKCS11_CKR_OBJECT_HANDLE_INVALID; 960: 961: if (out->memref.size != sizeof(uint32_t)) 962: return PKCS11_CKR_ARGUMENTS_BAD; 963: 964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size + 965: sizeof(struct obj_attrs); 966: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size)); 967: 968: return PKCS11_CKR_OK; 969: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_get_object_size", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_get_object_size", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_get_object_size)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_get_object_size",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "session",
      "object_handle",
      "obj",
      "obj->attributes",
      "obj_size"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:928"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:929"
      },
      {
        "lhs": "ctrlargs (from ctrl->memref.buffer/size)",
        "rhs": "serialargs_init(ctrl->memref.buffer, ctrl->memref.size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:940"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:942"
      },
      {
        "lhs": "object_handle",
        "rhs": "serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:946"
      },
      {
        "lhs": "obj",
        "rhs": "pkcs11_handle2object(object_handle, session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:953"
      },
      {
        "lhs": "obj_size",
        "rhs": "((struct obj_attrs *)obj->attributes)->attrs_size + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:964-965"
      },
      {
        "lhs": "out->memref.buffer (written)",
        "rhs": "obj_size via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:937-938",
        "evidence": "ptypes == exp_pt enforced"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:946-948",
        "evidence": "serialargs_get return code checked"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:950-952",
        "evidence": "serialargs_remaining_bytes checked"
      },
      {
        "kind": "access_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:957-959",
        "evidence": "check_access_attrs_against_token return checked"
      },
      {
        "kind": "size_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:961-962",
        "evidence": "out->memref.size == sizeof(uint32_t)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 304,
      "function": "TA_InvokeCommandEntryPoint",
      "rule": "other",
      "why": "alias of callee parameter 'client' bound to caller 'client' which originates from tee_session/tee_session2client (caller-provided/unknown origin)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_get_object_size(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 304,
      "function": "TA_InvokeCommandEntryPoint",
      "rule": "other",
      "why": "alias of callee parameter 'params' bound to caller 'params' (REE-provided TEE_Param array / shared buffers)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_get_object_size(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "entry_get_object_size",
      "rule": "other",
      "why": "Copies computed obj_size into out->memref.buffer (caller-provided REE-visible memref) via TEE_MemMove; destination is shared/REE-visible though obj_size is non-sensitive.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    }
  ]
}

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_object_size at lines [957, 1028, 1144]:
-- Call #1 at line 957 --
955: return PKCS11_CKR_OBJECT_HANDLE_INVALID;
956:
957: >>> rc = check_access_attrs_against_token(session, obj->attributes);
958: if (rc)
959: return PKCS11_CKR_OBJECT_HANDLE_INVALID;
-- Call #2 at line 1028 --
1026: * Only public objects can be modified unless normal user is logged in
1027: */
1028: >>> rc = check_access_attrs_against_token(session, obj->attributes);
1029:     	if (rc) {
1030:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #3 at line 1144 --
1142:     	 * Only public objects can be modified unless normal user is logged in
1143:     	 */
1144: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private",
      "get_class(head)",
      "obj_attrs (head->attrs_size etc.)"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head) or default true",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1552-1561"
      },
      {
        "lhs": "return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED",
        "rhs": "default case of get_class(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1562-1564"
      },
      {
        "lhs": "private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session))",
        "rhs": "checks that may cause PKCS11_CKR_USER_NOT_LOGGED_IN",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1544-1551",
        "evidence": "switch on get_class(head) enforces allowed classes and returns on default"
      },
      {
        "kind": "access_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571",
        "evidence": "session state queries determine access and early return if unauthorized"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 957,
      "function": "TA_InvokeCommandEntryPoint",
      "rule": "other",
      "why": "alias of callee parameter 'session' bound to value produced earlier in entry_get_object_size (session originates from serialargs_get_session_from_handle)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 957,
      "function": "TA_InvokeCommandEntryPoint",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to obj->attributes (attributes come from a TA-managed object referenced by handle2object)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1028,
      "function": "entry_set_attribute_value",
      "rule": "other",
      "why": "alias of callee parameter 'session' bound to session value from caller context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1028,
      "function": "entry_set_attribute_value",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to obj->attributes passed from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1144,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "alias of callee parameter 'session' bound to caller-provided session in this context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1144,
      "function": "entry_copy_object",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to obj->attributes (TA-managed attributes passed to checker)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(head, PKCS11_CKA_PRIVATE)",
      "return value"
    ],
    "propagation": [
      {
        "lhs": "return",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to obj->attributes from caller; attributes are TA-managed but originated from object lookup, so provenance is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "bool object_is_private(struct obj_attrs *head) { return get_bool(head, PKCS11_CKA_PRIVATE); }"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return",
        "rhs": "bbool (when rc == PKCS11_CKR_OK)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "existence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of parameter 'head' bound to obj->attributes (TA-managed attributes) from caller; provenance is TEE-private and used to determine 'private' flag",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      },
      {
        "lhs": "attr (written)",
        "rhs": "attr_ptr via TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "existence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "get_attribute_ptr return code checked"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to caller 'head' (obj attributes) – provenance is TA-managed attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of callee parameter 'attr' bound to caller-provided &bbool (stack-local buffer) in get_bool",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of callee parameter 'attr_size' bound to caller-provided &size (stack-local) in get_bool",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "rule": "other",
      "why": "TEE_MemMove copies attribute data from attr_ptr into caller-supplied buffer 'attr'; destination size is checked earlier but copy uses 'size' determined by get_attribute_ptr",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return PKCS11_RV_NOT_FOUND",
        "rhs": "count == 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-161"
      },
      {
        "lhs": "return PKCS11_CKR_GENERAL_ERROR",
        "rhs": "count != 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:163-164"
      }
    ],
    "sanitizers": [
      {
        "kind": "existence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "Checks on count: return NOT_FOUND if zero, GENERAL_ERROR if multiple"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to caller 'head' (obj attributes) – provenance TA-managed, considered TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of callee out-parameter 'attr_ptr' bound to caller's pointer (caller expects pointer to attribute data); origin may be TA-managed attribute storage (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of callee out-parameter 'attr_size' bound to caller's uint32_t storage (stack-local) receiving attribute size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "found",
      "pkcs11_ref",
      "pkcs11_ref.size"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "(char *)head + sizeof(struct obj_attrs), cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr entries / attr_size entries",
        "rhs": "if pkcs11_ref.id == attribute then record cur + sizeof(pkcs11_ref) and pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-139"
      },
      {
        "lhs": "*count",
        "rhs": "found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "Loop bounds use cur < end and compute next_off from header+size"
      },
      {
        "kind": "panic_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then TEE_Panic(0) to abort on malformed data"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of callee parameter 'head' bound to caller 'head' (obj attributes); head is TA-managed object storage (TEE-private) used to derive cur/end and loop over serialized attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of callee parameter 'attr' bound to caller-provided attr_ptr array; recorded pointers point inside serialized object (cur+sizeof(header)) and may alias TA memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=(max_found * sizeof(void *))"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of callee parameter 'attr_size' bound to caller-provided attr_size array; written sizes originate from pkcs11_ref.size parsed from serialized data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=(max_found * sizeof(uint32_t))"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of callee parameter 'count' bound to caller-provided count; function updates *count to number of matches (used by callers for existence/uniqueness checks)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "TEE_MemMove reads attribute header from serialized object at cur; next_off uses parsed size to advance — malformed size can cause out-of-bounds advancement and triggers TEE_Panic check",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst (memory at dst)",
        "rhs": "src (memory at src) copied n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,352,353,435,447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from serialized object (cur) into local pkcs11_ref on stack; both source and destination are TA-managed memory but malformed size in header drives next_off and loop progress.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr (inside serialized object) into caller-supplied buffer 'attr'; attr and attr_size were previously checked for size but copy length is derived from parsed size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header then a small sample of attribute bytes into local data[]; source is serialized object memory, destination is stack buffer, size uses MIN(parsed_size, sizeof(data)) limiting copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies raw header 'ref' into local 'head'; origin of 'ref' is caller-provided data (unknown provenance), so a malformed or attacker-controlled 'ref' could influence local state.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into 'pre' buffer; source 'prefix' provenance is unclear and destination 'pre' may be TA stack/buffer — length uses strlen(prefix) without explicit destination size here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur (inside serialized object) without ensuring remaining bytes >= sizeof(pkcs11_ref); parsed pkcs11_ref.size then drives next_off and loop progression enabling out-of-bounds reads/advances from malformed data.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attribute blob inside obj->attributes (parsed from TA-managed serialized object)",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_get_object_size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:304",
        "entry_get_object_size -> pkcs11_handle2object -> obj->attributes (head) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:953",
        "get_attribute_ptrs: cur = (char *)head + sizeof(struct obj_attrs); end = cur + head->attrs_size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove reading header from potentially short/tainted buffer at cur"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized attribute blob in obj->attributes such that end - cur < sizeof(pkcs11_ref)",
        "Ability to supply or influence object attributes (e.g., via prior API or crafted object data)"
      ],
      "attack_scenario": "Provide a serialized object with a truncated or malicious attribute region so that the TEE_MemMove at line 119 reads beyond the valid region, causing out-of-bounds read and subsequent next_off calculation to corrupt control flow/trigger TEE_Panic or undefined behavior.",
      "impact": "Denial-of-service via TEE_Panic or potential memory corruption leading to unexpected behavior; depending on platform internals, could escalate to higher integrity compromise."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Before TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)), verify (end - cur) >= sizeof(pkcs11_ref) and return an error if not."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size against remaining buffer bounds before computing next_off and advancing cur."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct read (TEE_MemMove) uses sizeof(pkcs11_ref) from cur without an explicit pre-read bounds check",
        "next_off computed from parsed pkcs11_ref.size (tainted) and used to advance loop, with only a later panic check"
      ],
      "negative_indicators": [
        "Loop condition cur < end exists and a later check triggers TEE_Panic if cur > end, which may mitigate some cases by aborting",
        "Source of head is TA-managed obj->attributes (not REE), reducing data-exfiltration concerns"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "This is primarily a memory-safety (out-of-bounds read/advance) issue: TEE_MemMove reads a fixed header size from a dynamically-sized serialized region without confirming remaining bytes, and the parsed size is then used to advance the cursor; insufficient input validation allows malformed data to drive unsafe memory operations.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from cur without ensuring remaining bytes >= sizeof(pkcs11_ref); parsed size then controls next_off and loop advancement."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "Loop uses cur < end and subsequent check cur > end triggers TEE_Panic(0)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Head is TA-managed obj->attributes (not REE-shared) so provenance is TEE-private",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:953"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses classification as information-disclosure (unencrypted_output) because data remains TEE-private"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Concrete read of sizeof header with no preceding explicit remaining-bytes check",
      "Parsed size used to advance pointer"
    ],
    "negative_indicators": [
      "Presence of loop bound cur < end and later cur > end panic reduces silent corruption risk"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the operation at line 119 is an out-of-bounds/read-risk due to lack of explicit pre-copy bounds verification; this is a clear weak input validation issue and prioritized over any disclosure classification because the data is TA-private.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=(end - cur)?,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reading a fixed-size header from cur without verifying remaining bytes >= sizeof(pkcs11_ref); malformed pkcs11_ref.size then drives next_off and loop progression.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}
フロー #23: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 251.05秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided serialized object buffer (params memref -> ctrl -> template / head->attrs_size)

シンク: TEE_MemMove copying sizeof(pkcs11_ref) from cur into stack-local pkcs11_ref

判定理由: The copy reads a fixed-size header from a position that is only bounded by cur<end; absent an explicit pre-copy bounds check, this yields a clear out-of-bounds read risk (CWE-125) with high confidence.

信頼度: HIGH

LLM対話履歴 (16 メッセージ)

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1028, 1144]:
-- Call #1 at line 1028 --
1026: * Only public objects can be modified unless normal user is logged in
1027: */
1028: >>> rc = check_access_attrs_against_token(session, obj->attributes);
1029:     	if (rc) {
1030:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;
-- Call #2 at line 1144 --
1142:     	 * Only public objects can be modified unless normal user is logged in
1143:     	 */
1144: >>> 	rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private",
      "get_class(head)",
      "object_is_private(head)"
    ],
    "propagation": [
      {
        "lhs": "get_class(head)",
        "rhs": "head (caller-provided obj->attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554"
      },
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560"
      },
      {
        "lhs": "return value (PKCS11_CKR_USER_NOT_LOGGED_IN)",
        "rhs": "private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1554-1564",
        "evidence": "switch on get_class(head) with default returning PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1028,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "alias of caller-provided session pointer passed into callee; session provenance includes REE-derived handle earlier in call chain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1028,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "alias of caller-provided obj->attributes passed into callee; attributes originate from TA object but ultimately from earlier REE inputs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1554,
      "function": "check_access_attrs_against_token",
      "rule": "weak_input_validation",
      "why": "Uses get_class(head) and object_is_private(head) on provided head without explicit null/structure integrity checks beyond switch default",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "switch (get_class(head)) { ... private = object_is_private(head); }"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "get_bool(head, PKCS11_CKA_PRIVATE)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1526,
      "function": "object_is_private",
      "rule": "other",
      "why": "alias of caller-provided head pointer passed into callee; origin (obj->attributes) is TA-managed but may contain REE-derived data upstream",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1526,
      "function": "object_is_private",
      "rule": "weak_input_validation",
      "why": "Calls get_bool(head, ...) without explicit null or structure integrity checks on head",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return false",
        "rhs": "rc == PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242"
      },
      {
        "lhs": "assert(rc == PKCS11_CKR_OK)",
        "rhs": "other rc values (enforced crash on unexpected rc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (populated by get_attribute)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:245-246"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-244",
        "evidence": "Handles PKCS11_RV_NOT_FOUND by returning false and asserts rc == PKCS11_CKR_OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of caller-provided head passed through call chain; head may ultimately contain REE-derived data used to decide 'private' property",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Calls get_attribute(head, ...) without explicit null/structure-integrity checks on head before dereference",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (out) / return PKCS11_CKR_BUFFER_TOO_SMALL",
        "rhs": "if (attr_size && *attr_size < size) set *attr_size = size and return PKCS11_CKR_BUFFER_TOO_SMALL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
      },
      {
        "lhs": "TEE_MemMove(attr, attr_ptr, size) effect",
        "rhs": "if (attr) copy 'size' bytes from attr_ptr to attr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      },
      {
        "lhs": "*attr_size (final)",
        "rhs": "if (attr_size) *attr_size = size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If provided attr_size is smaller than required size, function sets required size and returns PKCS11_CKR_BUFFER_TOO_SMALL"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "Returns early if get_attribute_ptr returns rc (non-OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided head passed into get_attribute; head may originate from TA object whose contents can be influenced by earlier REE-provided inputs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided attr (&bbool) passed into get_attribute; destination buffer is caller stack memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided attr_size (&size) bound used for buffer checks and returned as required size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr when attr is non-null; attr_ptr provenance not strongly validated here beyond get_attribute_ptr's rc",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed by reference to get_attribute_ptrs(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "populated by get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs result checked by if (rc) return rc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "return PKCS11_RV_NOT_FOUND",
        "rhs": "if (!count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-162"
      },
      {
        "lhs": "return PKCS11_CKR_GENERAL_ERROR",
        "rhs": "if (count != 1)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:163-165"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "Returns early if get_attribute_ptrs returns non-OK rc"
      },
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "Validates that exactly one attribute pointer was found (count==1) and returns errors otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 153,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller-provided head passed into helper; head may contain data originally influenced by REE inputs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 153,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr is an out-parameter aliased back to caller; pointer provenance comes from get_attribute_ptrs and may point to buffers derived from TA or earlier REE-origin data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 153,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size is returned to caller and used by callers for buffer checks; its value is set by get_attribute_ptrs and thus downstream code depends on it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 160,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptrs to validate attribute existence and pointer integrity; only checks count and rc but does not further validate attr_ptr contents or size semantics",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "derived from head and head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-120"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "found, attr_ptr, attr_size_ptr",
        "rhs": "updated when pkcs11_ref.id == attribute; attr_ptr/attr_size_ptr written from cur and pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-139"
      },
      {
        "lhs": "*count",
        "rhs": "assigned found at function end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121,145-148",
        "evidence": "Loop uses head->attrs_size to bound cur<end; function panics if cur > end"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided head passed into helper; head->attrs_size controls parsing bounds and may originate from earlier REE-influenced data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr (attr_ptr) is an out-parameter alias written from inside parsed buffer (cur + sizeof(pkcs11_ref)); pointer provenance flows back to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=pkcs11_ref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size out-parameter is set from pkcs11_ref.size and returned to caller; callers rely on this size for buffer operations",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=pkcs11_ref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur using TEE_MemMove without validating cur against end other than loop condition; malformed attrs_size or pkcs11_ref.size can cause out-of-bounds or panic",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "rcopy"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "bytes copied from src by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,186,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "dst contents",
        "rhs": "src region pointed-to memory (attr_ptr/cur/ref/prefix/... )",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,186,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from parsed buffer at cur into local pkcs11_ref using size sizeof(pkcs11_ref) while cur/end bounds depend on head->attrs_size which may be malformed or REE-influenced",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value from attr_ptr into caller buffer attr (e.g., &bbool); attr_ptr provenance comes from get_attribute_ptrs and may point to TA or earlier REE-derived memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies bytes from cur+sizeof(pkcs11_ref) into small local buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from parsed data and parsing relies on head->attrs_size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'head' structure from external 'ref' into local head via fixed sizeof(head); source 'ref' may be from serialized input and not strongly validated here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into pre buffer using strlen(prefix) without verifying pre capacity here; caller must ensure pre is allocated and large enough",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur into a local struct while cur/end bounds derive from head->attrs_size (potentially attacker-controlled) and there is no explicit check that cur+sizeof(pkcs11_ref) <= end before the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided serialized object buffer (params memref -> ctrl -> template / head->attrs_size)",
      "propagation_path": [
        "params->memref.buffer -> serialargs_alloc_get_attributes -> template (object.c:1002-1004)",
        "template->attrs_size -> head->attrs_size used to set end (attributes.c:107-108)",
        "head->attrs_size controls loop cur<end and cur arithmetic (attributes.c:115-121)",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads from cur (attributes.c:119)"
      ],
      "sink": "TEE_MemMove copying sizeof(pkcs11_ref) from cur into stack-local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or forges head->attrs_size or the serialized attribute layout in the caller buffer",
        "Serialized buffer places cur near or beyond end so that cur+sizeof(pkcs11_ref) > end"
      ],
      "attack_scenario": "A maliciously crafted serialized attributes blob causes get_attribute_ptrs to copy beyond the intended buffer, leading to out-of-bounds read (and potentially crash via subsequent panic or use of malformed pkcs11_ref.size), enabling information leak or denial-of-service.",
      "impact": "Out-of-bounds read may disclose adjacent memory or trigger panic (TEE_Panic) leading to TA crash; could enable data leakage or denial-of-service."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate that (cur + sizeof(pkcs11_ref)) <= end before performing TEE_MemMove; also validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:107-121",
        "recommendation": "Sanity-check head->attrs_size and ensure serialized entries are well-formed and non-negative before parsing."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Avoid panicking after the out-of-bounds copy; instead return an error if parsing detects inconsistent lengths to prevent relying on post-copy panic."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of sizeof(pkcs11_ref) from cur with cur computed from head->attrs_size",
        "No explicit check that cur+sizeof(pkcs11_ref) <= end prior to TEE_MemMove",
        "Subsequent code panics if cur> end, indicating parsing assumptions can fail"
      ],
      "negative_indicators": [
        "Loop condition cur < end offers partial bounding but does not guarantee space for sizeof(pkcs11_ref)",
        "Later panic may limit exploitation to denial-of-service in some cases"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy reads a fixed-size header from a position that is only bounded by cur<end; absent an explicit pre-copy bounds check, this yields a clear out-of-bounds read risk (CWE-125) with high confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove copies sizeof(pkcs11_ref) from cur without ensuring sufficient bytes remain in the serialized buffer (cur+sizeof(pkcs11_ref) may exceed end)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "Loop condition uses cur < end to bound parsing, but does not ensure space for full header prior to TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "Not fully safe; used as loop bound but not validated to guarantee room for header before copy",
      "evidence": "attributes.c:107-121"
    },
    {
      "arg": "cur (parse pointer)",
      "why_safe": "Partially bounded by end but may be within last bytes less than sizeof(pkcs11_ref)",
      "evidence": "attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure promotion for this same copy: although the source may be REE-derived, the dominant issue is out-of-bounds read which could also enable disclosure if exploited."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Exact copy size fixed (sizeof header) and bounding arithmetic visible",
      "Parsing code later panics on exceeded length, indicating malformed input can reach this point"
    ],
    "negative_indicators": [
      "Some loop-level bounds exist (cur<end) which partially mitigate trivial cases"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence applies: an out-of-bounds read is present due to insufficient pre-copy bounds checking, which is a high-confidence vulnerability; information-disclosure classification is secondary and not promoted here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "TEE_MemMove copies pkcs11_attribute_head from cur without ensuring cur+sizeof(pkcs11_ref) <= end; malformed head->attrs_size or pkcs11_ref.size can cause OOB read or panic.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute value from attr_ptr into caller buffer attr; attr_ptr provenance stems from parsed data and depends on get_attribute_ptrs correctness.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies into small local buffer 'data' using pkcs11_ref.size derived from parsed input; parsing assumptions may be violated by malformed attrs_size.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "why": "Copies serialized head from external ref into local head using fixed sizeof(head) without validating source size.",
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    }
  ]
}
フロー #24: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 222.41秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: Serialized attribute blob (head->attrs region) originating from caller-controlled params in earlier call chains

シンク: TEE_MemMove reading header from serialized buffer into local pkcs11_ref

判定理由: The TEE_MemMove at line 119 reads a fixed header size from a buffer whose traversal relies on a size field extracted from that same buffer; there is no immediate check that cur + sizeof(header) <= end before the read, so malformed or truncated serialized data can trigger an out-of-bounds read—this is a weak input validation / traversal vulnerability with medium confidence.

信頼度: MEDIUM

LLM対話履歴 (16 メッセージ)

関数: check_access_attrs_against_token
プロンプト 中間 (check_access_attrs_against_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_access_attrs_against_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1144]:
-- Call #1 at line 1144 --
1142: * Only public objects can be modified unless normal user is logged in
1143: */
1144: >>> rc = check_access_attrs_against_token(session, obj->attributes);
1145:     	if (rc) {
1146:     		rc = PKCS11_CKR_USER_NOT_LOGGED_IN;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1549: enum pkcs11_rc check_access_attrs_against_token(struct pkcs11_session *session,
1550: struct obj_attrs *head)
1551: {
1552: bool private = true;
1553:
1554: switch (get_class(head)) {
1555: case PKCS11_CKO_SECRET_KEY:
1556: case PKCS11_CKO_PRIVATE_KEY:
1557: case PKCS11_CKO_PUBLIC_KEY:
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: private = object_is_private(head);
1561: break;
1562: default:
1563: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1564: }
1565:
1566: if (private && (pkcs11_session_is_public(session) ||
1567: pkcs11_session_is_so(session))) {
1568: DMSG("Private object access from a public or SO session");
1569:
1570: return PKCS11_CKR_USER_NOT_LOGGED_IN;
1571: }
1572:
1573: return PKCS11_CKR_OK;
1574: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_access_attrs_against_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_access_attrs_against_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_access_attrs_against_token",
    "tainted_vars": [
      "session",
      "head",
      "private"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "object_is_private(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1560-1561"
      },
      {
        "lhs": "return value",
        "rhs": "pkcs11_session_is_public(session) || pkcs11_session_is_so(session) checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1566-1571"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1544-1549",
        "evidence": "switch on get_class(head) restricts allowed classes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1144,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases a session derived from ctrl buffer (which originates from REE), so session is REE-influenced.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1144,
      "function": "check_access_attrs_against_token",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj->attributes which is TA-private attributes storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_access_attrs_against_token(session, obj->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1566,
      "function": "check_access_attrs_against_token",
      "rule": "weak_input_validation",
      "why": "Access decision uses session predicates where session is influenced by REE-provided data; untrusted session provenance may affect auth checks.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (private && (pkcs11_session_is_public(session) || pkcs11_session_is_so(session)))"
    }
  ]
}

関数: object_is_private
プロンプト 中間 (object_is_private)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_private” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_access_attrs_against_token at lines [1560]:
-- Call #1 at line 1560 --
1558: case PKCS11_CKO_DATA:
1559: case PKCS11_CKO_CERTIFICATE:
1560: >>> private = object_is_private(head);
1561: break;
1562: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "object_is_private", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"object_is_private", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (object_is_private)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_private",
    "tainted_vars": [
      "head",
      "private"
    ],
    "propagation": [
      {
        "lhs": "private",
        "rhs": "get_bool(head, PKCS11_CKA_PRIVATE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1528"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1560,
      "function": "object_is_private",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj->attributes (TA-private attributes), so callee reads TA-private data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "private = object_is_private(head);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_private at lines [1528, 1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1528 --
1526: bool object_is_private(struct obj_attrs *head)
1527: { 1528: >>> return get_bool(head, PKCS11_CKA_PRIVATE); 1529: }
1530:
-- Call #2 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #3 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #4 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #5 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #6 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #7 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #8 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #9 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #11 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #12 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #13 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #14 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #15 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #16 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-241"
      },
      {
        "lhs": "bbool (return)",
        "rhs": "bbool read by get_attribute when rc == PKCS11_CKR_OK",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) ensures get_attribute succeeded before returning bbool"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1528,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj->attributes (TA-private) or caller-provided structures; provenance may be TA-private or REE-influenced depending on caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_PRIVATE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (output)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copies from attr_ptr into caller buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "attr_size",
        "rhs": "checked against size and updated (*attr_size = size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller's attributes (typically TA-private obj->attributes); provenance may be TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' argument (&bbool in caller) is a pointer to caller memory (often stack); destination of TEE_MemMove may alias caller buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=size,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' argument (&size in caller) is a caller-controlled size field used for bounds checks and may influence control flow.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr; if attr points to caller-controlled shared memory, this performs a write into caller region (bounds checked via attr_size).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "count",
        "rhs": "updated by get_attribute_ptrs(...) to indicate matches found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-160"
      },
      {
        "lhs": "rc",
        "rhs": "return code derived from count checks (0, NOT_FOUND, or GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "Checks ensure count != 0 and count == 1, returning NOT_FOUND or GENERAL_ERROR otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' originates from caller and may be TA-private or REE-influenced depending on caller; attr_ptr/attr_size are written by callee to return pointers/sizes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'candidate'/'value' originate from caller; callee returns pointer+size which are then compared against caller-provided expected size, so returned size influences control flow.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=pkcs11_ref.size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee writes attr pointer and size into caller-provided outputs; caller treats NOT_FOUND specially and may add attribute based on size, so attr_size influences allocation decisions.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char*)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (size field read from head data)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr (outputs)",
        "rhs": "set from cur + sizeof(pkcs11_ref) and pkcs11_ref.size when ids match",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "assigned found at end of function",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } guards against overruns but panics on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' originates from caller and provides the attribute blob region read by this function; origin may be TA-private or REE-influenced depending on caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' is a caller-provided output pointer array; callee writes pointers into it (returns addresses into head), making them aliases of head's internal buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' is a caller-provided output array filled with attribute sizes; these sizes (from pkcs11_ref.size) influence callers' subsequent bounds checks and allocations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' is an in/out parameter controlling how many matches are returned; callee updates it and caller relies on its value for control flow.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (from serialized data in head) to compute next_off and advance 'cur' without additional bounds validation beyond final check; malformed size could cause incorrect traversal.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "destination pointer argument supplied by caller",
        "site": "unknown:unknown"
      },
      {
        "lhs": "src",
        "rhs": "source pointer argument supplied by caller",
        "site": "unknown:unknown"
      },
      {
        "lhs": "len",
        "rhs": "length argument supplied by caller",
        "site": "unknown:unknown"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref from serialized 'cur' (potentially untrusted/malformed) into local structure without validating embedded size before use.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer 'attr'; destination may be caller stack or shared memory depending on caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies cli_head from 'cur' into local structure; source is parsed serialized data so origin may be untrusted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local pkcs11_ref; ref_attr provenance may be caller-controlled serialized data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local structure before using id/size to fetch attributes; malformed input can influence control flow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 buffer using prefix_len+1; relies on prefix_len correctness and destination sizing.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads pkcs11_ref from cur into local structure; source is serialized data within head and may be malformed.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into local array; size derived from serialized data affects copy length.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'head' structure from ref (serialized) into local head; source serialization may be untrusted and affects attrs_count checks.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; source may be caller-provided and length computed via strlen, rely on prefix validity.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads sizeof(pkcs11_ref) bytes from 'cur' (derived from head + offsets that include attacker-controlled pkcs11_ref.size) with only a late overrun check; malformed serialized sizes can cause out-of-bounds reads/advancement.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "Serialized attribute blob (head->attrs region) originating from caller-controlled params in earlier call chains",
      "propagation_path": [
        "params (caller REE-visible) -> ctrl->memref.buffer @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108",
        "serialargs parsing -> template/attr buffers -> obj->attributes @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118-1209",
        "get_attribute_ptrs reads from head region: cur = (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove reading header from serialized buffer into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies or manipulates the serialized attribute blob (head->attrs) such that offsets/sizes are malformed",
        "TA processes that blob via the shown code path (e.g., caller provides params leading to head)"
      ],
      "attack_scenario": "Crafted attribute blob with manipulated pkcs11_attribute_head.size or truncated buffer causes TEE_MemMove at line 119 to read beyond the intended buffer, potentially causing memory corruption or crash (TEE_Panic) and leading to denial of service or info-leak via side effects.",
      "impact": "Out-of-bounds read and incorrect traversal leading to panic or further memory-safety issues; potential DoS and depending on context possible information exposure or corruption of TA memory."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate that cur + sizeof(pkcs11_ref) <= end before performing TEE_MemMove; validate pkcs11_ref.size against remaining bytes before using it to advance."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Sanitize pkcs11_ref.size (e.g., cap to remaining length) and refuse malformed serialized entries rather than panicking."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Do not rely solely on final cur>end check and TEE_Panic; perform local checks before each read to avoid transient OOB access."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct read via TEE_MemMove from cur using sizeof(pkcs11_ref) before verifying that the remaining buffer contains that many bytes",
        "Next offset uses pkcs11_ref.size from untrusted data to advance traversal"
      ],
      "negative_indicators": [
        "Loop condition cur < end exists and a final check cur > end panics if overrun is detected (mitigation is late and causes panic rather than graceful handling)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The TEE_MemMove at line 119 reads a fixed header size from a buffer whose traversal relies on a size field extracted from that same buffer; there is no immediate check that cur + sizeof(header) <= end before the read, so malformed or truncated serialized data can trigger an out-of-bounds read—this is a weak input validation / traversal vulnerability with medium confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from 'cur' without verifying that sizeof(header) bytes are available; subsequent use of header.size to compute next_off trusts unvalidated data."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    },
    {
      "type": "type_validation",
      "location": "get_attribute_ptr:160-166",
      "evidence": "get_attribute_ptr validates count to be exactly 1"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Often TA-private but may originate from REE-provided serialized data; provenance varies",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118-1120"
    },
    {
      "arg": "cur",
      "why_safe": "Derived from head and head->attrs_size; loop condition uses cur < end but does not prevent the immediate read at cur of header if remaining < header size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-119"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses promotion to information-disclosure (unencrypted_output) despite TA-private data flowing elsewhere because the immediate issue is traversal/validation.",
    "Final panic (TEE_Panic) on detection may cause Denial-of-Service but is not a safe mitigation for malformed input."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct TEE_MemMove from cur using fixed sizeof(pkcs11_ref) before checking remaining bytes",
      "Subsequent arithmetic uses untrusted pkcs11_ref.size to advance cur"
    ],
    "negative_indicators": [
      "There is a loop-bound check and a final cur> end check that triggers panic, indicating some defensive checks albeit late"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety (weak input validation) is the primary issue: an out-of-bounds read can occur at the TEE_MemMove call due to insufficient pre-read bounds validation of serialized attribute data. This is prioritized over information-disclosure classifications.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads header from serialized blob and uses its size field to advance traversal without validating header availability first.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}
フロー #25: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> object_is_token -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valueobject_is_tokenget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 162.56秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-provided serialized attributes buffer (params->memref.buffer parsed into head)

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at attributes.c:119

判定理由: Memory-safety precedence: evidence shows an out-of-bounds read possibility at the MemMove call because the code fails to check header-size fits within remaining buffer; this is a clear weak input validation leading to CWE-125.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: object_is_token
プロンプト 中間 (object_is_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1018, 1134]:
-- Call #1 at line 1018 --
1016:
1017:
1018: >>> if (object_is_token(obj->attributes) &&
1019:     	    !pkcs11_session_is_read_write(session)) {
1020:     		DMSG("Can't modify persistent object in a RO session");
-- Call #2 at line 1134 --
1132:     
1133:     
1134: >>> 	if (object_is_token(obj->attributes) &&
1135:     	    !pkcs11_session_is_read_write(session)) {
1136:     		DMSG("Can't modify persistent object in a RO session");

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1531: bool object_is_token(struct obj_attrs *head)
1532: {
1533: return get_bool(head, PKCS11_CKA_TOKEN);
1534: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"object_is_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (object_is_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_token",
    "tainted_vars": [
      "head",
      "get_bool(...) return"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_TOKEN)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1533"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1018,
      "function": "object_is_token",
      "rule": "other",
      "why": "alias of obj->attributes (pointer) passed into object_is_token; origin is TA object attributes (likely TA-private) from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (object_is_token(obj->attributes) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1134,
      "function": "object_is_token",
      "rule": "other",
      "why": "alias of obj->attributes (pointer) passed into object_is_token; origin is TA object attributes (likely TA-private) from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (object_is_token(obj->attributes) &&"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_token at lines [1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #2 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #3 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #4 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #5 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #6 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #7 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #8 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #9 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #10 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #11 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #12 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #13 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #14 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #15 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "bbool",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return)",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false; assert(rc == PKCS11_CKR_OK) ensures expected success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1018,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes pointer passed into get_bool; origin is an in-TA object attribute structure",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_TOKEN);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1588,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "get_attribute reads into bbool using size from caller-derived data; caller-provided template/head may come from REE without strong validation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=ctrl->memref.size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) &&"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copy from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "*attr_size",
        "rhs": "size (returned by get_attribute_ptr) when attr_size provided",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided head pointer passed into get_attribute; origin may be TA object attributes (caller) and is tainted/unknown at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "attr and attr_size are caller-provided pointers (here &bbool,&size) bound into callee; destination buffers are TA-local",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr; size originates from get_attribute_ptr (caller-derived data) and could be attacker-influenced if attr_ptr points into REE-origin data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs return via count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "count==0 -> PKCS11_RV_NOT_FOUND; count!=1 -> PKCS11_CKR_GENERAL_ERROR enforces expected single attribute"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr and attr_size are bound by get_attribute_ptrs from head (caller-owned); caller (get_attribute) then uses returned size — origin may be TA-local or derived from REE via earlier parsing",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of value and size from candidate via get_attribute_ptrs; value/size originate from candidate (could be derived from REE-provided template) so origin is potentially tainted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=pkcs11_ref.size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr pointer bound into callee from *head; subsequent logic treats returned size and pointer assuming single attribute — origin of attribute data may be caller-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur,end",
        "rhs": "(char*)head + sizeof(struct obj_attrs) ; cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr / *attr_size / *count",
        "rhs": "assigned from cur/ pkcs11_ref when pkcs11_ref.id == attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:125-140"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop guards on cur < end and final check if (cur > end) { TEE_Panic } ensure traversal within attrs_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-provided head pointer is used for pointer arithmetic to derive cur/end and drive parsing; origin of head may be TA-local or derived from REE-parsed template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs); char *end = cur + head->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr (attr_ptr) output pointers are written as aliases into caller-provided buffers; these bindings expose attribute-data pointers derived from head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=pkcs11_ref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "parsing uses pkcs11_ref.size (read from unvalidated serialized data at cur) to compute next_off and pointers; malformed sizes can cause out-of-bounds or excessive counts before the cur>end panic",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "count pointer provided by caller is updated to reflect found matches; binding exposes caller-supplied capacity (max_found) to callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=*count,dst_sz=found"
        ]
      },
      "code_excerpt": "size_t max_found = *count; ... *count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "copy from src of n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,352,447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(pkcs11_ref) from cur (derived from head + offset) into local pkcs11_ref; cur/end arithmetic uses head->attrs_size which may be derived from untrusted serialized data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr into caller-provided attr; size originates from get_attribute_ptr and may reflect unvalidated data-derived size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local buffer; pkcs11_ref.size read from serialized stream may be maliciously large or malformed.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies strlen(prefix) bytes from prefix (caller-provided) into pre; prefix origin may be REE-visible and length unchecked relative to pre capacity.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur where cur is computed from head + offsets derived from head->attrs_size (potentially attacker-controlled) and loop guard uses cur < end instead of ensuring cur+sizeof(pkcs11_ref) <= end, allowing out-of-bounds read.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided serialized attributes buffer (params->memref.buffer parsed into head)",
      "propagation_path": [
        "params->memref.buffer -> ctrlargs/template (serialargs) @ object.c:992-1004",
        "template->attrs_size -> head->attrs_size used to set end @ attributes.c:107-108",
        "cur = (char*)head + sizeof(struct obj_attrs); cur used as src for MemMove @ attributes.c:119"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at attributes.c:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or supplies serialized attribute blob placed into head (through REE-provided memref).",
        "No stricter validation that cur+sizeof(pkcs11_ref) <= end before the copy."
      ],
      "attack_scenario": "A crafted attrs_size or malformed serialized stream causes cur to point near or beyond end so that copying sizeof(pkcs11_ref) reads beyond the intended buffer, causing out-of-bounds read and possible leak or panic.",
      "impact": "Out-of-bounds read can leak adjacent memory (information disclosure) or trigger a panic/crash (availability)."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before reading header; validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      },
      {
        "type": "type_validation",
        "location": "parsing call-sites: object.c:992-1004",
        "recommendation": "Validate serialized template.attrs_size and individual attribute sizes when deserializing from REE-provided buffers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur derived from head->attrs_size to compute source pointer for MemMove without checking cur+sizeof(header) <= end.",
        "Loop guard uses cur < end which does not guarantee full header fits."
      ],
      "negative_indicators": [
        "There is a later check if (cur > end) { TEE_Panic(0); } which partially bounds traversal but is insufficient to prevent the header read.",
        "head may be TA-local in some call paths (reducing attacker control) but many paths show head derived from REE-provided data."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: evidence shows an out-of-bounds read possibility at the MemMove call because the code fails to check header-size fits within remaining buffer; this is a clear weak input validation leading to CWE-125.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header copy uses cur computed from head->attrs_size with insufficient bounds check (cur < end instead of cur+sizeof(header) <= end)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop uses cur < end and final check if (cur > end) { TEE_Panic }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "often TA-private after parsing",
      "evidence": "various call-sites show head originates from deserialized template (object.c:1002-1004)"
    },
    {
      "arg": "cur",
      "why_safe": "guarded by loop condition cur < end but not fully safe for header-sized read",
      "evidence": "attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure classification here; however later copies that move TA-derived data into REE-visible memrefs (e.g., TEE_MemMove to params[0].memref.buffer at entry.c:366) could enable leakage if attacker-influenced data reaches those sinks."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unguarded header-size read via MemMove at attributes.c:119",
      "Multiple call paths where head is derived from REE-provided buffers"
    ],
    "negative_indicators": [
      "Some call-sites may provide TA-controlled head reducing attacker influence"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The MemMove at line 119 performs a fixed-size copy from a pointer computed from potentially untrusted serialized data without ensuring the full header fits, yielding a high-confidence out-of-bounds read (weak input validation).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies 'size' bytes from attr_ptr into attr; size comes from get_attribute_ptr (which may be derived from unvalidated serialized data).",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Uses pkcs11_ref.size from serialized stream to bound a copy into a fixed-size local buffer; malformed size could cause logic errors or truncation/over-read concerns.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies caller-provided prefix into pre without ensuring pre capacity relative to strlen(prefix).",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #26: TA_InvokeCommandEntryPoint -> entry_copy_object -> object_is_token -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectobject_is_tokenget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 164.52秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

詳細: The memmove at line 119 moves data entirely within TA memory (src and dst TA-private); bounds check and panic protect against out-of-bounds, so no exploitable information disclosure or overflow at this line.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: object_is_token
プロンプト 中間 (object_is_token)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_token” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1134]:
-- Call #1 at line 1134 --
1132:
1133:
1134: >>> if (object_is_token(obj->attributes) &&
1135:     	    !pkcs11_session_is_read_write(session)) {
1136:     		DMSG("Can't modify persistent object in a RO session");

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1531: bool object_is_token(struct obj_attrs *head)
1532: {
1533: return get_bool(head, PKCS11_CKA_TOKEN);
1534: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_token",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"object_is_token",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (object_is_token)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_token",
    "tainted_vars": [
      "head",
      "PKCS11_CKA_TOKEN"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_TOKEN)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1531-1533"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1134,
      "function": "object_is_token",
      "rule": "other",
      "why": "Call-site binding: callee 'head' aliases obj->attributes from caller (TA-private object attributes passed into helper).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (object_is_token(obj->attributes) && !pkcs11_session_is_read_write(session)) {"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_token at lines [1533, 1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1533 --
1531: bool object_is_token(struct obj_attrs *head)
1532: { 1533: >>> return get_bool(head, PKCS11_CKA_TOKEN); 1534: }
1535:
-- Call #2 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #3 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #4 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #5 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #6 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #7 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #8 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #9 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #10 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #11 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #12 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #13 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #14 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #15 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (after get_attribute) or false if PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "if get_attribute returns PKCS11_RV_NOT_FOUND the function returns false (sanitizes missing attribute)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1134,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'head' aliases obj->attributes from caller (TA-private object attributes passed into get_bool).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_TOKEN);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "attr_ptr (source from get_attribute_ptr) copied via TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "*attr_size",
        "rhs": "size (returned/updated after copy or when buffer too small)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-182,189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "propagates error rc from get_attribute_ptr"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'head' aliases caller's obj_attrs (obj->attributes) which is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'attr' is caller stack (&bbool) passed to be written by get_attribute (TA-local buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'attr_size' is caller stack (&size) used for bounds check and updated by callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(...) which may update it",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "return value from get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "checks count == 0 -> NOT_FOUND, count != 1 -> GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'head' aliases caller's obj_attrs (TA-private attributes data).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'attr_ptr' is an out-parameter that will be set to point into TA-private attribute storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'attr_size' is updated by callee to indicate attribute size (TA-private metadata).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "contents at cur copied via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "*attr or *attr_size entries",
        "rhs": "set from cur+sizeof(pkcs11_ref) and pkcs11_ref.size when id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "updated to found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop iterates while cur < end and computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size"
      },
      {
        "kind": "panic_on_error",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-147",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 107,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'head' aliases caller-provided obj_attrs (TA-private attribute blob).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 112,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' (attr_ptr) is an out-parameter that will be filled with pointers into TA-private storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 113,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' is updated with attribute sizes (TA-private metadata written out).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 110,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'count' is used as input max_found and updated with number of matches found (caller-provided control value).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=*count,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "size_t max_found = *count; ... *count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (caller-provided)",
        "rhs": "written from src via TEE_MemMove(dest, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop ensures cur < end before reading and computes next_off = sizeof(pkcs11_ref)+pkcs11_ref.size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&pkcs11_ref' is a TA-local stack buffer written by TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'cur' points into head->attrs (TA-private blob) and is used as read source for memmove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size - offset,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest 'attr' may be caller buffer (could be TA-local or caller-provided) receiving attribute bytes from attr_ptr (pointer into TA-private storage).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(pkcs11_ref) from cur (pointer into TA-private head->attrs) into a TA-local stack struct; loop enforces cur < end and TEE_Panic on overflow.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "head->attrs (TA-private)",
      "propagation_path": [
        "head->attrs -> cur (get_attribute_ptrs:attributes.c:107)",
        "cur -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (attributes.c:119)"
      ],
      "sink": "TEE_MemMove destination &pkcs11_ref (TA-stack)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed or maliciously crafted head->attrs content to cause out-of-bounds read"
      ],
      "attack_scenario": "An attacker would need to corrupt TA-private attribute blob to force read past end and trigger TEE_Panic; no REE exposure from this line.",
      "impact": "Denial-of-service via TEE_Panic if head->attrs_size is inconsistent; no data leak to REE from this call."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate pkcs11_ref.size against remaining bytes before computing next_off and copying struct to avoid reliance on TEE_Panic and prefer graceful error return."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition cur < end before reading",
        "TEE_Panic invoked on cur > end (bounds enforcement)"
      ],
      "negative_indicators": [
        "next_off computed from pkcs11_ref.size which is read from untrusted TA-private blob; if attrs_size corrupted could cause panic"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove at line 119 moves data entirely within TA memory (src and dst TA-private); bounds check and panic protect against out-of-bounds, so no exploitable information disclosure or overflow at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Destination and source are TA-private and effective bounds checks exist; no evidence of secret flowing to REE at this sink line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    },
    {
      "type": "panic_on_error",
      "location": "get_attribute_ptrs:145-147",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "points to TA-private attribute blob; reads are guarded by cur < end and attrs_size",
      "evidence": "attributes.c:107-109,115-121"
    },
    {
      "arg": "dest (&pkcs11_ref)",
      "why_safe": "TA-local stack buffer sized to sizeof(pkcs11_ref)",
      "evidence": "attributes.c:117-119"
    }
  ],
  "residual_risks": [
    "line 119: reliance on TEE_Panic for bounds violation could lead to DoS if attrs_size is corrupted",
    "other: copies of TA-private data to REE-visible buffers occur elsewhere (e.g., out->memref at object.c:1237 and entry.c:366) and should be reviewed"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence that src and dst are TA-private for this call",
      "Bounds checks and panic present"
    ],
    "negative_indicators": [
      "pkcs11_ref.size is read from the blob and used to compute next_off before additional validation"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks prevent out-of-bounds read for the struct copy and there is no REE-visible destination here, so this sink line is not a vulnerability under the analysis rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "obj_handle (TA-local) is copied into caller-provided out->memref.buffer (REE-visible); check callers for sensitive data exposure.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Local return code rc is copied into params[0].memref.buffer (REE-visible); verify that no sensitive TA-private data is later written to REE here.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #27: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> object_is_modifiable -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueobject_is_modifiableget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 187.26秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

詳細: The specific TEE_MemMove at line 119 copies a fixed, small header into a local buffer with existing loop bounds and a panic on overrun; therefore it is not marked vulnerable. However, upstream usage of untrusted size fields and reliance on head->attrs_size warrants structural warnings.

信頼度: MEDIUM

LLM対話履歴 (14 メッセージ)

関数: object_is_modifiable
プロンプト 中間 (object_is_modifiable)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_modifiable” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1035]:
-- Call #1 at line 1035 --
1033:
1034:
1035: >>> 	if (!object_is_modifiable(obj->attributes)) {
1036:     		rc = PKCS11_CKR_ACTION_PROHIBITED;
1037:     		goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1536: bool object_is_modifiable(struct obj_attrs *head)
1537: {
1538: return get_bool(head, PKCS11_CKA_MODIFIABLE);
1539: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_modifiable",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"object_is_modifiable",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (object_is_modifiable)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_modifiable",
    "tainted_vars": [
      "head",
      "get_bool(...)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_MODIFIABLE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1538"
      },
      {
        "lhs": "head",
        "rhs": "obj->attributes (caller-provided in entry_set_attribute_value)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1035"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1035,
      "function": "object_is_modifiable",
      "rule": "other",
      "why": "alias of obj->attributes (callee param 'head') passed from caller; origin is TA object store (TA-private) but provenance matters for authorization checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (!object_is_modifiable(obj->attributes)) {"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_modifiable at lines [1538, 1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1538 --
1536: bool object_is_modifiable(struct obj_attrs *head)
1537: { 1538: >>> return get_bool(head, PKCS11_CKA_MODIFIABLE); 1539: }
1540:
-- Call #2 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #3 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #4 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #5 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #6 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #7 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #8 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #9 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #10 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #11 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #12 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #13 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #14 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (set by get_attribute) or false if not found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      },
      {
        "lhs": "head",
        "rhs": "caller-provided attr list (e.g., obj->attributes or template-derived head)",
        "site": "call sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/*"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1538,
      "function": "get_bool",
      "rule": "other",
      "why": "callee 'head' parameter aliases obj->attributes from caller (TA-private); provenance affects authorization checks that use returned boolean",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_MODIFIABLE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (or attr_size output)",
        "rhs": "size (as determined by get_attribute_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-183,189-190"
      },
      {
        "lhs": "attr (destination memory)",
        "rhs": "attr_ptr (source) via TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "callee 'head' parameter aliases caller-provided attribute list (obj->attributes or template-derived); provenance influences attr_ptr resolution",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "destination pointer 'attr' (&bbool) is a caller-local buffer passed in; get_attribute may write up to 'size' bytes into it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "caller-provided attr_size is consulted and may be updated; insufficient caller-provided size triggers BUFFER_TOO_SMALL return but caller must handle it correctly",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159"
      },
      {
        "lhs": "rc",
        "rhs": "result of get_attribute_ptrs and subsequent count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "checks on count: return NOT_FOUND if 0, GENERAL_ERROR if count != 1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided 'head' may originate from TA-private object store or template derived from REE; provenance is unclear and influences attribute resolution",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "output parameter 'attr_ptr' is set by callee to point into attribute storage; caller passes &attr_ptr here (caller-local), aliasing risk for downstream copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "caller-provided attr_size pointer (&size) is used to receive attribute size; insufficient validation of that size by callers may lead to mismatches",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char*)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "contents copied from cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr (attr_ptr entries)",
        "rhs": "cur + sizeof(pkcs11_ref) when pkcs11_ref.id matches attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-135"
      },
      {
        "lhs": "attr_size pointers written",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "*count (out)",
        "rhs": "found (number of matched attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } prevents out-of-bounds continuation"
      },
      {
        "kind": "limit_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110-111,140-141",
        "evidence": "uses max_found and breaks when found == max_found to limit outputs"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-provided 'head' is dereferenced to compute cur/end and attrs_size; if head originated from untrusted/template data (REE-derived) this influences loop bounds",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs); char *end = cur + head->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "output parameter 'attr' (attr pointers) is written with pointers into head's buffer (cur + sizeof(pkcs11_ref)); caller-supplied attr array may alias or expose internal pointers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "uses pkcs11_ref.size (from buffer contents) to compute next_off and to write attr_size; insufficient validation could allow malformed size fields to affect iteration or reported sizes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=pkcs11_ref.size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; ... if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-supplied 'count' is used to limit outputs (max_found) and is updated with found; origin is caller-local but influences behavior",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=*count,dst_sz=*count"
        ]
      },
      "code_excerpt": "size_t max_found = *count; ... *count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied into dst) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &pkcs11_ref is a local TA stack buffer (TEE-private) being written from src; alias/binding of dst parameter to a local struct.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source 'cur' points into head-derived buffer; origin may be TA-private or derived from untrusted/template data (unknown provenance).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "length argument is a constant sizeof(pkcs11_ref); binding of size parameter to this constant observed at call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies a fixed-size pkcs11_attribute_head (sizeof(pkcs11_ref)) into a local TA buffer; loop bounds (cur<end) and a post-loop panic check limit out-of-bounds writes at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "cur (pointer into head-derived attribute buffer)",
      "propagation_path": [
        "head -> cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed head->attrs_size causing cur/end mismatch and bypassing the cur<end check",
        "attacker-controlled memory backing 'cur' (template derived from REE) with crafted header"
      ],
      "attack_scenario": "If head->attrs_size were manipulated such that cur points past valid memory and the bounds checks are bypassed, fixed-size copy could read attacker-controlled memory into pkcs11_ref, influencing subsequent logic.",
      "impact": "Potential incorrect behavior or control-flow influence inside TA; not an immediate REE disclosure from this call-site."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:107-121",
        "recommendation": "Validate head and head->attrs_size before iterating; ensure cur+sizeof(pkcs11_ref) <= end before TEE_MemMove."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Sanity-check pkcs11_ref.size (e.g., reasonable max) before using it to compute next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "call copies fixed sizeof(pkcs11_ref) (constant length)",
        "existence of cur<end loop condition and post-loop panic check"
      ],
      "negative_indicators": [
        "head->attrs_size provenance ambiguous (could be derived from REE/template)",
        "next_off uses pkcs11_ref.size which is read from untrusted buffer later used to advance loop"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The specific TEE_MemMove at line 119 copies a fixed, small header into a local buffer with existing loop bounds and a panic on overrun; therefore it is not marked vulnerable. However, upstream usage of untrusted size fields and reliance on head->attrs_size warrants structural warnings.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Fixed-size local copy with loop bounds and panic check prevents an immediate out-of-bounds write or REE-data leak at this call-site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "for (; cur < end; cur += next_off) { ... TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); }"
    },
    {
      "type": "mem_access_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "used to compute cur/end with loop condition; but provenance unclear so requires validation",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    },
    {
      "arg": "cur (src)",
      "why_safe": "read by fixed-size memcpy into local header; still depends on head->attrs_size bounds",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
    }
  ],
  "residual_risks": [
    "Upstream weak_input_validation: pkcs11_ref.size (from buffer) used to compute next_off and reported sizes; malformed sizes can influence iteration and downstream behavior"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed copy length (sizeof header)",
      "loop bound cur<end and panic on overrun"
    ],
    "negative_indicators": [
      "head->attrs_size provenance unclear (could be influenced by REE/template)",
      "other calls write pointers/sizes derived from parsed header"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 119 is a bounded, fixed-size copy into TA-private memory with loop and post-checks, so it's not classified vulnerable; structural issues elsewhere remain and are listed.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=pkcs11_ref.size,dst_sz=*attr_size"
        ]
      },
      "why": "Uses pkcs11_ref.size (from parsed buffer) to compute next_off and report sizes without strong sanitization; malformed size fields can affect iteration and downstream copies.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Relies on caller-provided attr_size and returns BUFFER_TOO_SMALL to signal required size; callers must handle this properly to avoid misuse.",
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_alloc_get_attributes consumes REE-provided buffer to build template; template->attrs_size later drives internal allocations and parsing.",
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}
フロー #28: TA_InvokeCommandEntryPoint -> entry_copy_object -> object_is_copyable -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectobject_is_copyableget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 166.94秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-supplied serialized attribute list (head->attrs_size / cur derived from head)

シンク: TEE_MemMove reading sizeof(pkcs11_ref) bytes from cur which may be out-of-bounds

判定理由: Memory-safety precedence: the TEE_MemMove at line 119 can read past end because the loop only ensures cur < end, not that sizeof(header) bytes remain; this is a clear bounds-validation omission and thus a vulnerable out-of-bounds read (CWE-125).

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: object_is_copyable
プロンプト 中間 (object_is_copyable)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “object_is_copyable” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1151]:
-- Call #1 at line 1151 --
1149:
1150:
1151: >>> 	if (!object_is_copyable(obj->attributes)) {
1152:     		rc = PKCS11_CKR_ACTION_PROHIBITED;
1153:     		goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1541: bool object_is_copyable(struct obj_attrs *head)
1542: {
1543: return get_bool(head, PKCS11_CKA_COPYABLE);
1544: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_copyable",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"object_is_copyable",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (object_is_copyable)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "object_is_copyable",
    "tainted_vars": [
      "head",
      "PKCS11_CKA_COPYABLE",
      "get_bool(...)"
    ],
    "propagation": [
      {
        "lhs": "return value",
        "rhs": "get_bool(head, PKCS11_CKA_COPYABLE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1541-1544"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1151,
      "function": "object_is_copyable",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases obj->attributes (TA-private object attributes) passed from entry_copy_object.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!object_is_copyable(obj->attributes)) {"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from object_is_copyable at lines [1543, 1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1543 --
1541: bool object_is_copyable(struct obj_attrs *head)
1542: { 1543: >>> return get_bool(head, PKCS11_CKA_COPYABLE); 1544: }
1545:
-- Call #2 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #3 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #4 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #5 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #6 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #7 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #8 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #9 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #10 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #11 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #12 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #13 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size",
      "get_attribute(...)"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool when rc == PKCS11_CKR_OK; false when rc == PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_handling",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-243",
        "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) ensures subsequent bbool is valid"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1151,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj->attributes (TA-private) passed from entry_copy_object; underlying attributes originate in TA memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return get_bool(head, PKCS11_CKA_COPYABLE);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc",
      "get_attribute_ptr(...)"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (when provided and sufficient)",
        "rhs": "size assigned from get_attribute_ptr then possibly copied back",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-191"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copying size bytes from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided obj attributes (origin TA-private) passed into get_attribute via get_bool.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' argument (&bbool) is a pointer to caller stack buffer (TA-private) that may be written via TEE_MemMove(attr, attr_ptr, size).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' argument (&size) is caller-provided (TA-local) size pointer used for bounds check and updated on return.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "get_attribute_ptrs(...)"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then possibly modified by get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "return value from get_attribute_ptrs(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "if (!count) -> PKCS11_RV_NOT_FOUND; if (count != 1) -> PKCS11_CKR_GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided object attributes (TA-private) from get_attribute.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter is written to point into TA attribute storage (returned to caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is updated with attribute size (used for later bounds checks).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading bytes from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr (out)",
        "rhs": "cur + sizeof(pkcs11_ref) when pkcs11_ref.size != 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-134"
      },
      {
        "lhs": "*attr_size_ptr (out)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes discovered)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } prevents out-of-bounds continuation"
      },
      {
        "kind": "limit_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110-111,140-141",
        "evidence": "max_found and found logic limits number of populated outputs (respects provided count)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases caller-provided object attributes (TA memory); loop reads from head->attrs_size and memory at cur.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Reads attribute header via TEE_MemMove from cur (derived from head) and uses pkcs11_ref.size to compute next offset (TA memory-driven pointer arithmetic).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Assigns out pointers into regions computed from cur (cur + sizeof(pkcs11_ref)), exposing pointers into internal attribute storage to the caller via attr.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer_size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer passed into TEE_MemMove",
        "site": "call-sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer passed into TEE_MemMove",
        "site": "call-sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "memory copied",
        "rhs": "n bytes from src to dest",
        "site": "multiple TEE_MemMove invocations (e.g., lines 119,187,220,352)"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers often check provided size (attr_size) and return BUFFER_TOO_SMALL before calling or expect size matches"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads attribute header from cur (derived from head + offset) into local pkcs11_ref; source is TA attribute storage computed from head->attrs_size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size+sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value from attr_ptr (internal attribute storage) into caller-supplied buffer 'attr' (TA-local buffer in this call-site); relies on prior size checks but src length drives copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies small sample bytes from cur+header into a local data[] for logging; source is TA attribute area computed from cur and pkcs11_ref.size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Header is read from cur via TEE_MemMove without ensuring at-call-point that end - cur >= sizeof(pkcs11_ref); loop condition only checks cur < end, allowing an out-of-bounds read driven by tainted attrs_size.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-supplied serialized attribute list (head->attrs_size / cur derived from head)",
      "propagation_path": [
        "params (TEE_Param from REE) -> ctrl/ctrlargs -> template parsing @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1118",
        "obj->attributes (TA-private) referenced and passed into get_attribute_ptrs via get_attribute_ptr -> get_attribute_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "get_attribute_ptrs reads header: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reading sizeof(pkcs11_ref) bytes from cur which may be out-of-bounds"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A crafted serialized attribute blob where head->attrs_size (or surrounding structure) causes cur to be within less than sizeof(pkcs11_ref) bytes from end",
        "Attacker controls or influences the serialized attributes stored/parsed into head"
      ],
      "attack_scenario": "Attacker supplies malformed attribute list such that cur points near buffer end; TEE_MemMove reads header bytes beyond buffer, causing out-of-bounds read and potential crash or information leakage.",
      "impact": "Memory-safety violation (out-of-bounds read) leading to potential denial-of-service (panic) or information disclosure depending on memory layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure (end - cur) >= sizeof(pkcs11_ref) before invoking TEE_MemMove; validate head->attrs_size and each next_off arithmetic to prevent overflow/underflow."
      },
      {
        "type": "range_check",
        "location": "prior to loop in get_attribute_ptrs",
        "recommendation": "Validate head->attrs_size against an expected maximum and verify header size fields (pkcs11_ref.size) do not cause next_off to wrap or exceed bounds."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur and end with only cur < end loop condition before fixed-size header copy",
        "No explicit check that remaining buffer >= sizeof(pkcs11_ref) at the copy site"
      ],
      "negative_indicators": [
        "A subsequent check if (cur > end) triggers TEE_Panic(0) which indicates some out-of-bounds handling but occurs after the copy",
        "count/max_found logic limits outputs but does not guarantee header fit"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: the TEE_MemMove at line 119 can read past end because the loop only ensures cur < end, not that sizeof(header) bytes remain; this is a clear bounds-validation omission and thus a vulnerable out-of-bounds read (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header via TEE_MemMove without ensuring remaining buffer length >= sizeof(pkcs11_ref)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "limit_check",
      "location": "get_attribute_ptrs:110-141",
      "evidence": "max_found and found logic limit number of outputs but do not validate header size before copy"
    },
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } (post-copy detection)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "used to compute end and loop bound, but not validated to ensure header fits at each iteration",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108,115-121"
    }
  ],
  "residual_risks": [
    "119: potential information disclosure or further memory corruption paths suppressed by focusing on memory-safety; header over-read could also leak adjacent memory"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of missing pre-copy size check",
      "Use of attacker-influenced size fields (pkcs11_ref.size) to compute next_off"
    ],
    "negative_indicators": [
      "Post-copy panic check exists but occurs after the risky copy"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The primary issue is a bounds-validation omission leading to an out-of-bounds read at the TEE_MemMove call; this supersedes information-disclosure classification and is supported by control/data flow and missing pre-copy checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); param was checked for size but structural risk of exposing TA-private handles to REE exists.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=template_size"
        ]
      },
      "why": "Copies obj->attributes into freshly allocated head_new (TA-private) before modification; risk: attribute handling may later be exposed if not sanitized.",
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=pointer_size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "why": "Assigns pointers into internal attribute storage to out-parameters (attr), exposing internal pointers to callers in TA context.",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    }
  ]
}
フロー #29: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_token -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_tokenget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 151.16秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Serialized attributes buffer (head->attrs) potentially influenced by REE/caller

シンク: TEE_MemMove into local pkcs11_ref reading from cur

判定理由: The copy reads a fixed header size from a buffer with insufficient pre-checks (only cur < end), enabling out-of-bounds read when header lies close to end; this is a clear memory-safety defect (CWE-125).

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #2 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #3 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #4 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #5 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #6 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #7 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #8 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #9 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #10 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #11 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #12 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return false",
        "rhs": "rc == PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242"
      },
      {
        "lhs": "assert(rc == PKCS11_CKR_OK)",
        "rhs": "rc from get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244"
      },
      {
        "lhs": "return bbool",
        "rhs": "bbool populated by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "explicit check for PKCS11_RV_NOT_FOUND and return false"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "get_bool",
      "rule": "other",
      "why": "Binding of caller 'head' (attributes) into get_bool parameter; origin may be REE-derived or TA-created—region ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute to return OK (assert(rc==OK)); malformed or unexpected attributes from caller could trigger assert or undefined behavior.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out) / *attr_size",
        "rhs": "size set by get_attribute_ptr or updated when *attr_size < size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (written)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "size_write",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190",
        "evidence": "if (attr_size) *attr_size = size; sets actual size after potential copy"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter; origin (REE-derived vs TA-private) ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller-provided destination buffer 'attr' (here &bbool) into callee; origin is caller stack (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size /* initially sizeof(bbool) */"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of caller-provided attr_size pointer into callee; caller-provided size influences buffer acceptance and copy behavior.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Copies from attr_ptr (origin determined by get_attribute_ptr) into provided buffer; attr_ptr origin and size must be trusted/validated upstream.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(*attr_size before call)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "post-condition based on count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "Checks that count != 0 and count == 1, returning NOT_FOUND or GENERAL_ERROR otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller 'head' pointer into callee parameter; head may be derived from REE-parsed templates or TA-created attrs, origin ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*head)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller-provided attr_ptr output pointer into callee; attr_ptr points into object storage returned by helper and is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding of caller-provided attr_size pointer into callee; caller-controlled size affects subsequent buffer handling.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptrs to supply a single valid pointer/size; if get_attribute_ptrs returns unexpected pointers or sizes from untrusted origin, callers may be misled.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when matched)",
        "rhs": "cur + sizeof(pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:132"
      },
      {
        "lhs": "*attr_size_ptr (when matched)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:138"
      },
      {
        "lhs": "*count",
        "rhs": "found at loop end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } detects out-of-bounds advancement and aborts"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur (derived from head buffer) into local struct via TEE_MemMove; fields (size/id) are attacker-controlled if head originates from REE.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Uses pkcs11_ref.size (from untrusted input) to compute next_off and advance cur, enabling input-driven out-of-bounds pointer arithmetic.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 132,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Stores pointers into attr array that point inside the head buffer (cur + sizeof(pkcs11_ref)); these pointers may reference shared/REE-originated memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Advancing cur by attacker-controlled next_off can exceed end; code panics via TEE_Panic if cur > end rather than safely returning an error.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: caller passed attr/attr_size/count pointers into get_attribute_ptrs; origins influence results and are ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(void*)/*write*/,src_sz=unknown,dst_sz=*count"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "dest",
        "rhs": "src (copied n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from buffer 'cur' (potentially REE-controlled) into local struct; fields like size/id are attacker-controllable.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination pointer '&pkcs11_ref' (callee dest) is a TA-local stack location passed to TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source pointer 'cur' (callee src) points into object buffer that may originate from REE/shared memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur into local struct while only checking cur < end; an attacker-controlled pkcs11_ref.size can make cur + sizeof(pkcs11_ref) exceed end leading to out-of-bounds read or panic.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attributes buffer (head->attrs) potentially influenced by REE/caller",
      "propagation_path": [
        "head buffer -> cur (obj buffer pointer) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "pkcs11_ref.size (attacker-controlled) used to compute next_off and advance cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      ],
      "sink": "TEE_MemMove into local pkcs11_ref reading from cur"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker can supply or influence the serialized object buffer (head->attrs) contents",
        "head->attrs_size is set such that cur < end but cur + sizeof(pkcs11_ref) may exceed end"
      ],
      "attack_scenario": "Crafted attribute stream where cur is near end and declared pkcs11_ref.size is large or manipulated such that reading sizeof(pkcs11_ref) at cur overruns the buffer, causing out-of-bounds read and potential panic or disclosure.",
      "impact": "Memory-safety violation (out-of-bounds read) leading to TEE_Panic or potential reading of out-of-bounds memory; denial-of-service and possible information leakage depending on memory layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before copying header; validate pkcs11_ref.size against remaining bytes before using it to advance cur."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Validate header fields (id/size) are sensible and within expected ranges before trusting them."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Return an error on malformed input instead of calling TEE_Panic."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of TEE_MemMove reading a fixed header size from cur with only cur < end guard",
        "Subsequent use of attacker-controlled pkcs11_ref.size to compute next_off and advance cur"
      ],
      "negative_indicators": [
        "There is an overall end bound (end = cur + head->attrs_size) and a panic if cur > end, which aborts instead of silent memory corruption"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy reads a fixed header size from a buffer with insufficient pre-checks (only cur < end), enabling out-of-bounds read when header lies close to end; this is a clear memory-safety defect (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header copied from cur without ensuring full header fits in remaining buffer, enabling out-of-bounds read."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "head->attrs_size used to compute end but header-level bounds not checked before header copy: attributes.c:107-108,119"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses immediate information-disclosure classification (unencrypted_output) although header fields derived from REE could later influence REE-visible outputs."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Exact local copy of fixed header size from buffer with inadequate pre-checks",
      "Subsequent reliance on header fields for pointer arithmetic"
    ],
    "negative_indicators": [
      "Panic on detected overflow may limit exploit scenarios to denial-of-service rather than silent corruption"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety deficiency (missing pre-copy bounds check for header) is present and takes priority; thus the line is marked vulnerable (CWE-125) with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "why": "Uses attacker-controlled pkcs11_ref.size to compute next_off and advance cur, enabling input-driven out-of-bounds arithmetic.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 132,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=sizeof(void*)"
        ]
      },
      "why": "Stores pointers into attr array that point inside the head buffer; these may reference REE-originated memory.",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "why": "Advancing cur by attacker-controlled next_off can exceed end; code panics via TEE_Panic if cur > end rather than returning an error.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}
フロー #30: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_token -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_tokenget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 174.21秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: Serialized attribute buffer length (head->attrs_size) potentially derived from upstream/REE-provided data

シンク: TEE_MemMove reading header struct from serialized buffer (cur)

判定理由: Memory-safety issue (insufficient validation of remaining bytes before fixed-size copy) is present and takes precedence; this is a clear weak-input-validation vulnerability that can trigger over-read/panic.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #2 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #3 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #4 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #5 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #6 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #7 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #8 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #9 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #10 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #11 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #12 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return value)",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false; assert(rc == PKCS11_CKR_OK) otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of pub_head (obj_attrs) passed into get_bool from check_created_attrs_against_token; head originates in TA and may contain caller-influenced attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=sizeof(struct obj_attrs*)"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1595,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of priv_head (obj_attrs) passed into get_bool from check_created_attrs_against_token; priv_head derived from templates within TA",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=sizeof(struct obj_attrs*)"
        ]
      },
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TOKEN) && !pkcs11_session_is_read_write(session)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2179,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool; origin is object metadata (TA-private) but may reflect earlier REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=sizeof(struct obj_attrs*)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size (from get_attribute_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "evidence": "rc = get_attribute_ptr(...) ; if (rc) return rc;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of head (obj_attrs) passed from caller into get_attribute; head holds attributes that may be derived from earlier REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller-provided destination buffer (&bbool) passed into get_attribute; destination is TA-private local buffer receiving attr contents",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller-provided attr_size pointer (&size) passed into get_attribute; used to bound copy and updated on buffer-too-small",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(..., &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "return codes derived from count checks (if !count -> NOT_FOUND; if count!=1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks that get_attribute_ptrs returned exactly one match: if (!count) return NOT_FOUND; if (count != 1) return GENERAL_ERROR"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159",
        "evidence": "No-op if get_attribute_ptrs indicates error via rc and wrapper returns rc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller passes head, attr_ptr and attr_size into get_attribute_ptr; head may be TA-private object attributes possibly derived from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "call-site passes candidate and &value,&size into get_attribute_ptr; candidate originates from obj iteration and may reflect earlier inputs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "call-site passes *head and addresses for value/size into get_attribute_ptr; caller will add attribute if NOT_FOUND, so attr_size controls later copy behavior",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*attr_size_ptr (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes found)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "for-loop enforces cur < end and breaks when found == max_found"
      },
      {
        "kind": "integrity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) TEE_Panic(0) to detect overruns"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided head passed into get_attribute_ptrs; head->attrs_size drives loop bounds and may be influenced by upstream data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Deserializes pkcs11_attribute_head from cur via TEE_MemMove; pkcs11_ref.size directly affects next_off and loop stepping without per-field validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Assigns pointers into the serialized attribute buffer (cur + sizeof(pkcs11_ref)) into attr array; these pointers alias into head's memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=*count"
        ]
      },
      "code_excerpt": "if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 150,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Updates caller-provided count with number of matches found; caller logic depends on this count for further decisions",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "*count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst (destination buffer)",
        "rhs": "data copied from src by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,352,353,435,447"
      },
      {
        "lhs": "src (source pointer)",
        "rhs": "various caller origins (cur, attr_ptr, ref, prefix, etc.)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,352,353,435,447"
      },
      {
        "lhs": "n (size)",
        "rhs": "call-site provided size (sizeof(pkcs11_attribute_head), size, strlen(prefix), MIN(...))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,352,353,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,140-142",
        "evidence": "callers sometimes check buffer sizes (e.g., attr_size check in get_attribute) and break conditions in get_attribute_ptrs loop"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Deserializes pkcs11_attribute_head from cur into local struct; pkcs11_ref.size subsequently used to compute next_off without validating size field",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload into caller-provided buffer 'attr' using size from attribute metadata; destination is caller memory and size originates from attribute list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur then uses cli_head.size to compute len without validating cli_head.size bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies small preview bytes from serialized attribute payload into local buffer; source pointer computed as cur + sizeof(pkcs11_ref)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=head->attrs_size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header 'head' from serialized ref into local head variable; ref buffer origin may be caller-provided serialized object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into pre buffer using strlen(prefix); destination pre may be uninitialized if allocation failed elsewhere",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_attribute_head) from cur without ensuring cur+sizeof(...) <= end; pkcs11_ref.size then drives next_off, so malformed/short serialized input can cause out-of-bounds read/over-read and potential crash or memory corruption.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attribute buffer length (head->attrs_size) potentially derived from upstream/REE-provided data",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_generate_key_pair @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:350",
        "entry_generate_key_pair -> create/deserialize templates and pass to attribute routines @ /workspace/.../ta/processing.c:448-472",
        "get_attribute_ptrs loop uses head->attrs_size to set end and iterates cur; cur used as src for memmove @ /workspace/.../ta/attributes.c:107-119",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/.../ta/attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reading header struct from serialized buffer (cur)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized attribute buffer placed into head (attrs_size inconsistent with actual data).",
        "Invocation path that leads to get_attribute_ptrs with that head (e.g., via entry_generate_key_pair deserialization)."
      ],
      "attack_scenario": "Provide a serialized object whose attrs_size is smaller than the remaining bytes but loop allows cur < end while cur+sizeof(header) > end; TEE_MemMove will read past buffer boundaries causing crash or memory disclosure.",
      "impact": "Denial of Service via panic/crash or potential memory disclosure/corruption depending on surrounding memory layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure (cur + sizeof(pkcs11_attribute_head)) <= end before calling TEE_MemMove and validate pkcs11_ref.size against remaining bytes."
      },
      {
        "type": "integrity_check",
        "location": "deserialization callers:430-447|unknown",
        "recommendation": "Validate serialized object header fields (attrs_size and individual attribute sizes) immediately after parsing the serialized header."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur and end derived from head->attrs_size in same function",
        "TEE_MemMove copies fixed sizeof(header) without pre-checking remaining bytes",
        "Post-loop panic (if cur > end) indicates boundary issues handled late"
      ],
      "negative_indicators": [
        "Loop condition cur < end provides some protection when attrs_size is well-formed",
        "There is a later check that panics if cur > end (detects overrun after the fact)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue (insufficient validation of remaining bytes before fixed-size copy) is present and takes precedence; this is a clear weak-input-validation vulnerability that can trigger over-read/panic.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies header from cur without ensuring enough remaining bytes; pkcs11_ref.size then used to compute next_off, enabling out-of-bounds behavior on malformed input."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "for (; cur < end; cur += next_off) { ... } and break when found == max_found"
    },
    {
      "type": "integrity_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "Only safe if well-formed; code assumes integrity of attrs_size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-109"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses treating the copy as information-disclosure (unencrypted_output) at this line because over-read/relay to panic is primary concern"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy without pre-check against end",
      "Subsequent use of copied header field to compute offsets"
    ],
    "negative_indicators": [
      "Loop condition and post-loop panic provide partial detection but occur after the copy"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The code performs a fixed-size memmove from a position based on serialized lengths without first ensuring the full header fits in remaining buffer; this is a classic weak input validation leading to out-of-bounds read/panic and thus is classified as vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=*count"
        ]
      },
      "why": "Assigns pointers into the serialized attribute buffer into attr array; these pointers alias into head's memory and may point into attacker-controlled serialized data",
      "code_excerpt": "if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute payload into caller buffer using size from attribute metadata; relies on prior parsing correctness",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but destination is REE-visible",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #31: TA_InvokeCommandEntryPoint -> entry_create_object -> check_created_attrs_against_token -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_create_objectcheck_created_attrs_against_tokenget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 163.22秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: Serialized attributes buffer (from REE via params->memref.buffer parsed into head)

シンク: TEE_MemMove into local pkcs11_ref at line 119

判定理由: The memmove at line 119 performs a fixed-size read from a cursor derived from attacker-controlled serialized data without verifying sufficient remaining bytes; this is a clear weak input validation leading to memory-safety issues, so the line is classified vulnerable.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_token at lines [1588, 1595, 1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1588 --
1586: return rc;
1587:
1588: >>> if (get_bool(head, PKCS11_CKA_TRUSTED) &&
1589: !pkcs11_session_is_so(session)) { 1590: DMSG("Can't create trusted object"); -- Call #2 at line 1595 -- 1593: }
1594:
1595: >>> if (get_bool(head, PKCS11_CKA_TOKEN) &&
1596:     	    !pkcs11_session_is_read_write(session)) {
1597:     		DMSG("Can't create persistent object");
-- Call #3 at line 1928 --
1926:     	enum pkcs11_attr_id attr = func_to_attr(function);
1927:     
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #4 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #5 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #6 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #7 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #8 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #9 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #10 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #11 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #12 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-239"
      },
      {
        "lhs": "bbool",
        "rhs": "output of get_attribute(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "existence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "if get_attribute returns PKCS11_RV_NOT_FOUND the function returns false"
      },
      {
        "kind": "assertion",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 364,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller's 'head' (attributes built from parsed template); origin is processed from REE input, recorded as TEE-private alias of REE-derived data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_token(session, head); // -> get_bool(head, ...)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 233,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Returns boolean based on attribute data retrieved from 'head' (possibly REE-influenced) with only a not-found check and an assert; may allow improper privilege decisions if 'head' is attacker-controlled.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=1,src_sz=size,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (caller-visible) or attr",
        "rhs": "size (from get_attribute_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-191"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "attr_ptr (source) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-190",
        "evidence": "checks attr and attr_size pointers before writing"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller's head (attributes list) which may be derived from REE input; origin recorded as TEE-private alias of REE-derived data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' parameter aliases caller local &bbool (TEE-private stack), record as TEE-private destination.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller local &size; used for bounds check and updated on buffer-too-small return.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute data from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; if callers pass a REE-visible buffer elsewhere, this is a TA->REE copy vector.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(..., &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "outputs of get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "if (!count) return NOT_FOUND; if (count != 1) return GENERAL_ERROR;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller's 'head' (attributes list) from get_attribute; origin may be TEE-private derived from REE input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' parameter will receive pointer(s) to attribute data from get_attribute_ptrs; origin region unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller size variable to receive attribute size from get_attribute_ptrs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'candidate' (head) equals caller candidate list; origin likely TEE-private but may derive from REE-parsed data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' parameter (&value) will be set to attribute data pointer; recorded origin unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter (&size) receives attribute size; used later for size equality checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter is dereferenced *head from caller and may point to attributes list built earlier; origin recorded as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' parameter (&value) will receive pointer to attribute data; origin unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter (&size) receives size of attribute; used by caller to decide add/compare operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur,end",
        "rhs": "(char*)head + sizeof(struct obj_attrs) ; cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (from header read)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "memcpy from cur via TEE_MemMove(cur -> &pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "*count (out)",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      },
      {
        "lhs": "attr_ptr/attr_size_ptr outputs",
        "rhs": "set from cur+sizeof(pkcs11_ref) and pkcs11_ref.size when a match is found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "range_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop condition cur < end ensures iteration stops when cur reaches end"
      },
      {
        "kind": "post_loop_assert",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) panic to catch exceeding serial object length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided 'head' from get_attribute_ptr; origin likely TEE-private derived from REE input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' parameter aliases caller-provided pointer array (attr_ptr) to receive attribute pointers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter aliases caller-provided attr_size to receive sizes; used by caller for bounds comparisons.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'count' parameter aliases caller-provided count and is used to limit returned matches (max_found).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from cur into pkcs11_ref via TEE_MemMove and trusts pkcs11_ref.size to compute next_off without verifying header bounds beyond loop condition; malformed size could cause next_off to skip/overrun.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=(end-cur),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from unvalidated pkcs11_ref.size; if pkcs11_ref.size is large it may make cur advance past end leading to panic.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=(end-cur)"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "pkcs11_ref",
      "attr",
      "attr_ptr",
      "cur",
      "prefix",
      "pre"
    ],
    "propagation": [
      {
        "lhs": "destination buffers",
        "rhs": "written from source pointers passed into TEE_MemMove",
        "site": "multiple call sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "pkcs11_ref (local)",
        "rhs": "data copied from cur via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "data copied from attr_ptr via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [
      {
        "kind": "caller_bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "get_attribute checks attr_size against size and returns BUFFER_TOO_SMALL"
      },
      {
        "kind": "loop_range_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop condition cur < end and post-loop panic if cur > end"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from potentially REE-influenced buffer into pkcs11_ref and trusts pkcs11_ref.size to compute next_off without further validation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=(end-cur),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload into caller-provided buffer 'attr' from attr_ptr; origin of attr_ptr may be REE-derived and destination region depends on caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur and then uses cli_head.size to compute len without additional validation; malformed size could affect subsequent reads.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=(end-cur),dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into prefix2 buffer; boundaries depend on prefix_len computed earlier — ensure prefix_len is validated before copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; origin and size of pre must be valid to avoid overwrite or logging of untrusted data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur into local pkcs11_ref without validating that cur+sizeof(pkcs11_ref) <= end; malformed pkcs11_ref.size (from attacker-controlled serialized data) can cause out-of-bounds reads/logic errors.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized attributes buffer (from REE via params->memref.buffer parsed into head)",
      "propagation_path": [
        "params (TEE_Param memref) -> parsed template -> head (obj_attrs) @ ta/object.c:325-333",
        "head->attrs array cursor 'cur' computed from head @ ta/attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from 'cur' @ ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove into local pkcs11_ref at line 119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed serialized attributes in REE-visible memref passed to TA",
        "Parsed head->attrs_size is such that cur may be near end (or attacker crafts pkcs11_ref.size inconsistent with remaining buffer)"
      ],
      "attack_scenario": "An attacker-provided serialized attribute stream places 'cur' within a few bytes of 'end' so that the memmove of sizeof(pkcs11_ref) reads past the buffer, leading to out-of-bounds reads or causing pkcs11_ref.size to be attacker-controlled, which can then drive next_off and loop behavior (potential panic or further memory-safety issues).",
      "impact": "Memory-safety violation (out-of-bounds read) which can lead to crashes (TEE_Panic), logic corruption, or be leveraged for further exploitation depending on surrounding code."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (cur + sizeof(pkcs11_ref)) <= end before performing TEE_MemMove; validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Check pkcs11_ref.size for reasonable upper bounds (e.g., not exceeding remaining buffer or an application-defined maximum) before using it to advance cursor."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of attacker-influenced buffer 'cur' as source to TEE_MemMove at line 119",
        "No prior explicit check that cur+sizeof(pkcs11_ref) <= end",
        "Subsequent code uses pkcs11_ref.size to compute next_off, enabling further exploitation"
      ],
      "negative_indicators": [
        "Loop has cur < end condition and a post-loop panic if cur > end (partial protection but too late for the memmove)",
        "There is a general loop boundary check which may prevent many cases"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove at line 119 performs a fixed-size read from a cursor derived from attacker-controlled serialized data without verifying sufficient remaining bytes; this is a clear weak input validation leading to memory-safety issues, so the line is classified vulnerable.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(pkcs11_ref) from 'cur' without ensuring sufficient bytes remain (no pre-read bounds check)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "range_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "loop condition cur < end and next_off computed; but no explicit check cur+sizeof(pkcs11_ref) <= end before memmove"
    },
    {
      "type": "post_loop_assert",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) TEE_Panic(0) (detects overflow after the fact)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially validated via head->attrs_size used to compute end, but head itself originates from parsed REE input and requires stricter validation",
      "evidence": "ta/object.c:325-333; ta/attributes.c:107-108"
    },
    {
      "arg": "cur",
      "why_safe": "Loop condition cur < end provides some protection but does not ensure room for sizeof(pkcs11_ref)",
      "evidence": "ta/attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses reporting on information disclosure at this site because destination is TA-private; however pkcs11_ref.size can still drive later copies (e.g., to REE) if unchecked."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct memmove from potentially attacker-controlled buffer without pre-check",
      "Subsequent use of read header field to control loop/cursor advancement"
    ],
    "negative_indicators": [
      "Loop boundary and a post-loop panic exist but are insufficient to prevent the immediate memmove"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety concerns take priority; absence of a pre-read bounds check makes the memmove at line 119 vulnerable to out-of-bounds read and related logic corruption.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=(end-cur)"
        ]
      },
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size from untrusted pkcs11_ref.size without validating it against remaining buffer, enabling cursor overrun.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}
フロー #32: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_parent_attrs_against_processing -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keycheck_parent_attrs_against_processingget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 182.54秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: object attribute buffer 'head' (may be TA-private or attacker-controlled serialized payload in some call paths)

シンク: TEE_MemMove reading header at cur into local pkcs11_ref

判定理由: The copy reads a fixed-size header from a cursor derived from a buffer end computed from head->attrs_size but does not verify that the full header fits; this is a classic out-of-bounds read risk (CWE-125) enabling crash or data leakage.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: check_parent_attrs_against_processing
プロンプト 中間 (check_parent_attrs_against_processing)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_parent_attrs_against_processing” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1200]:
-- Call #1 at line 1200 --
1198: * compatible with the mechanism passed
1199: */
1200: >>> rc = check_parent_attrs_against_processing(proc_params->id, function,
1201: wrapping_key->attributes);
1202:     	if (rc) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1920: check_parent_attrs_against_processing(enum pkcs11_mechanism_id proc_id,
1921: enum processing_func function,
1922: struct obj_attrs *head)
1923: {
1924: enum pkcs11_class_id key_class = get_class(head);
1925: enum pkcs11_key_type key_type = get_key_type(head);
1926: enum pkcs11_attr_id attr = func_to_attr(function);
1927:
1928: if (!get_bool(head, attr)) {
1929: DMSG("%s not permitted", id2str_attr(attr));
1930: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1931: }
1932:
1933:
1934: switch (proc_id) {
1935: case PKCS11_CKM_AES_ECB:
1936: case PKCS11_CKM_AES_CBC:
1937: case PKCS11_CKM_AES_CTS:
1938: case PKCS11_CKM_AES_CTR:
1939: case PKCS11_CKM_AES_CMAC:
1940: case PKCS11_CKM_AES_CMAC_GENERAL:
1941: if (key_class == PKCS11_CKO_SECRET_KEY &&
1942: key_type == PKCS11_CKK_AES)
1943: break;
1944:
1945: DMSG("%s invalid key %s/%s", id2str_proc(proc_id),
1946: id2str_class(key_class), id2str_key_type(key_type));
1947:
1948: if (function == PKCS11_FUNCTION_WRAP)
1949: return PKCS11_CKR_WRAPPING_KEY_TYPE_INCONSISTENT;
1950: else if (function == PKCS11_FUNCTION_UNWRAP)
1951: return PKCS11_CKR_UNWRAPPING_KEY_TYPE_INCONSISTENT;
1952: else
1953: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1954:
1955: case PKCS11_CKM_AES_ECB_ENCRYPT_DATA:
1956: case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
1957: if (key_class != PKCS11_CKO_SECRET_KEY &&
1958: key_type != PKCS11_CKK_AES)
1959: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:
1961: if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:
1969: return PKCS11_CKR_FUNCTION_FAILED;
1970: }
1971:
1972: break;
1973: case PKCS11_CKM_MD5_HMAC:
1974: case PKCS11_CKM_SHA_1_HMAC:
1975: case PKCS11_CKM_SHA224_HMAC:
1976: case PKCS11_CKM_SHA256_HMAC:
1977: case PKCS11_CKM_SHA384_HMAC:
1978: case PKCS11_CKM_SHA512_HMAC:
1979: case PKCS11_CKM_MD5_HMAC_GENERAL:
1980: case PKCS11_CKM_SHA_1_HMAC_GENERAL:
1981: case PKCS11_CKM_SHA224_HMAC_GENERAL:
1982: case PKCS11_CKM_SHA256_HMAC_GENERAL:
1983: case PKCS11_CKM_SHA384_HMAC_GENERAL:
1984: case PKCS11_CKM_SHA512_HMAC_GENERAL:
1985: if (key_class != PKCS11_CKO_SECRET_KEY)
1986: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1987:
1988: if (key_type == PKCS11_CKK_GENERIC_SECRET)
1989: break;
1990:
1991: switch (proc_id) {
1992: case PKCS11_CKM_MD5_HMAC:
1993: case PKCS11_CKM_MD5_HMAC_GENERAL:
1994: if (key_type == PKCS11_CKK_MD5_HMAC)
1995: break;
1996: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1997: case PKCS11_CKM_SHA_1_HMAC:
1998: case PKCS11_CKM_SHA_1_HMAC_GENERAL:
1999: if (key_type == PKCS11_CKK_SHA_1_HMAC)
2000: break;
2001: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2002: case PKCS11_CKM_SHA224_HMAC:
2003: case PKCS11_CKM_SHA224_HMAC_GENERAL:
2004: if (key_type == PKCS11_CKK_SHA224_HMAC)
2005: break;
2006: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2007: case PKCS11_CKM_SHA256_HMAC:
2008: case PKCS11_CKM_SHA256_HMAC_GENERAL:
2009: if (key_type == PKCS11_CKK_SHA256_HMAC)
2010: break;
2011: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2012: case PKCS11_CKM_SHA384_HMAC:
2013: case PKCS11_CKM_SHA384_HMAC_GENERAL:
2014: if (key_type == PKCS11_CKK_SHA384_HMAC)
2015: break;
2016: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2017: case PKCS11_CKM_SHA512_HMAC:
2018: case PKCS11_CKM_SHA512_HMAC_GENERAL:
2019: if (key_type == PKCS11_CKK_SHA512_HMAC)
2020: break;
2021: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2022: default:
2023: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2024: }
2025: break;
2026:
2027: case PKCS11_CKM_EDDSA:
2028: if (key_type != PKCS11_CKK_EC_EDWARDS) {
2029: EMSG("Invalid key %s for mechanism %s",
2030: id2str_type(key_type, key_class),
2031: id2str_proc(proc_id));
2032: return PKCS11_CKR_KEY_TYPE_INCONSISTENT;
2033: }
2034: if (key_class != PKCS11_CKO_PUBLIC_KEY &&
2035: key_class != PKCS11_CKO_PRIVATE_KEY) {
2036: EMSG("Invalid key class for mechanism %s",
2037: id2str_proc(proc_id));
2038:
2039: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2040: }
2041: break;
2042:
2043: case PKCS11_CKM_ECDSA:
2044: case PKCS11_CKM_ECDSA_SHA1:
2045: case PKCS11_CKM_ECDSA_SHA224:
2046: case PKCS11_CKM_ECDSA_SHA256:
2047: case PKCS11_CKM_ECDSA_SHA384:
2048: case PKCS11_CKM_ECDSA_SHA512:
2049: case PKCS11_CKM_ECDH1_DERIVE:
2050: if (key_type != PKCS11_CKK_EC) {
2051: EMSG("Invalid key %s for mechanism %s",
2052: id2str_type(key_type, key_class),
2053: id2str_proc(proc_id));
2054:
2055: return PKCS11_CKR_KEY_TYPE_INCONSISTENT;
2056: }
2057: if (key_class != PKCS11_CKO_PUBLIC_KEY &&
2058: key_class != PKCS11_CKO_PRIVATE_KEY) {
2059: EMSG("Invalid key class for mechanism %s",
2060: id2str_proc(proc_id));
2061:
2062: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2063: }
2064: break;
2065: case PKCS11_CKM_RSA_PKCS:
2066: case PKCS11_CKM_MD5_RSA_PKCS:
2067: case PKCS11_CKM_SHA1_RSA_PKCS:
2068: case PKCS11_CKM_SHA224_RSA_PKCS:
2069: case PKCS11_CKM_SHA256_RSA_PKCS:
2070: case PKCS11_CKM_SHA384_RSA_PKCS:
2071: case PKCS11_CKM_SHA512_RSA_PKCS:
2072: case PKCS11_CKM_RSA_AES_KEY_WRAP:
2073: case PKCS11_CKM_RSA_PKCS_OAEP:
2074: case PKCS11_CKM_RSA_PKCS_PSS:
2075: case PKCS11_CKM_SHA1_RSA_PKCS_PSS:
2076: case PKCS11_CKM_SHA224_RSA_PKCS_PSS:
2077: case PKCS11_CKM_SHA256_RSA_PKCS_PSS:
2078: case PKCS11_CKM_SHA384_RSA_PKCS_PSS:
2079: case PKCS11_CKM_SHA512_RSA_PKCS_PSS:
2080: if (key_type != PKCS11_CKK_RSA) {
2081: EMSG("Invalid key %s for mechanism %s",
2082: id2str_type(key_type, key_class),
2083: id2str_proc(proc_id));
2084:
2085: return PKCS11_CKR_KEY_TYPE_INCONSISTENT;
2086: }
2087: if (key_class != PKCS11_CKO_PUBLIC_KEY &&
2088: key_class != PKCS11_CKO_PRIVATE_KEY) {
2089: EMSG("Invalid key class for mechanism %s",
2090: id2str_proc(proc_id));
2091:
2092: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2093: }
2094: break;
2095: default:
2096: DMSG("Invalid processing %#"PRIx32"/%s", proc_id,
2097: id2str_proc(proc_id));
2098:
2099: return PKCS11_CKR_MECHANISM_INVALID;
2100: }
2101:
2102: if (!parent_key_complies_allowed_processings(proc_id, head)) {
2103: DMSG("Allowed mechanism failed");
2104: return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
2105: }
2106:
2107: return PKCS11_CKR_OK;
2108: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_parent_attrs_against_processing",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"check_parent_attrs_against_processing",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (check_parent_attrs_against_processing)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_parent_attrs_against_processing",
    "tainted_vars": [
      "proc_id",
      "function",
      "head",
      "key_class",
      "key_type",
      "attr"
    ],
    "propagation": [
      {
        "lhs": "key_class",
        "rhs": "get_class(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1924"
      },
      {
        "lhs": "key_type",
        "rhs": "get_key_type(head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1925"
      },
      {
        "lhs": "attr",
        "rhs": "func_to_attr(function)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1926"
      },
      {
        "lhs": "get_bool(head, attr) result",
        "rhs": "head (caller-provided attributes) and attr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1928"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1928-1931",
        "evidence": "Checks get_bool(head, attr) and returns if not permitted"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1200,
      "function": "check_parent_attrs_against_processing",
      "rule": "other",
      "why": "Call-site binding: proc_params->id (proc_id) passed from caller; origin derived from parsed ctrl args (caller-controlled).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_parent_attrs_against_processing(proc_params->id, function, wrapping_key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1200,
      "function": "check_parent_attrs_against_processing",
      "rule": "other",
      "why": "Call-site binding: 'function' argument forwarded from upstream (processing_func) — caller-controlled enum.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_parent_attrs_against_processing(proc_params->id, function, wrapping_key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1200,
      "function": "check_parent_attrs_against_processing",
      "rule": "other",
      "why": "Call-site binding: wrapping_key->attributes passed as 'head' — alias of object attributes (TA-held) but contents originate from object state; origin considered TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_parent_attrs_against_processing(proc_params->id, function, wrapping_key->attributes);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1928,
      "function": "check_parent_attrs_against_processing",
      "rule": "weak_input_validation",
      "why": "Uses attribute flags from 'head' (caller-controlled object attributes) to permit operations; logic assumes get_bool/head contents are trustworthy.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!get_bool(head, attr)) { return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; }"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_parent_attrs_against_processing at lines [1928, 1961, 2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 1928 --
1926: enum pkcs11_attr_id attr = func_to_attr(function);
1927:
1928: >>> 	if (!get_bool(head, attr)) {
1929:     		DMSG("%s not permitted", id2str_attr(attr));
1930:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
-- Call #2 at line 1961 --
1959:     			return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;
1960:     
1961: >>> 		if (get_bool(head, PKCS11_CKA_ENCRYPT)) {
1962:     			/*
1963:     			 * Intentionally refuse to proceed despite
-- Call #3 at line 2179 --
2177:     
2178:     	case PKCS11_CKA_EXTRACTABLE:
2179: >>> 		return get_bool(obj->attributes, attr->id);
2180:     
2181:     	case PKCS11_CKA_SENSITIVE:
-- Call #4 at line 2183 --
2181:     	case PKCS11_CKA_SENSITIVE:
2182:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> 		return !get_bool(obj->attributes, attr->id);
2184:     
2185:     	case PKCS11_CKA_TRUSTED:
-- Call #5 at line 2237 --
2235:     
2236:     	case PKCS11_CKA_EXTRACTABLE:
2237: >>> 		return get_bool(obj->attributes, attr->id);
2238:     
2239:     	case PKCS11_CKA_SENSITIVE:
-- Call #6 at line 2241 --
2239:     	case PKCS11_CKA_SENSITIVE:
2240:     	case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> 		return !get_bool(obj->attributes, attr->id);
2242:     	case PKCS11_CKA_NEVER_EXTRACTABLE:
2243:     	case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #7 at line 2327 --
2325:     		 * direction i.e from TRUE -> FALSE.
2326:     		 */
2327: >>> 		return get_bool(obj->attributes, req_attr->id);
2328:     	default:
2329:     		break;
-- Call #8 at line 2414 --
2412:     		 */
2413:     		if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #9 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #10 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size) return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "buffer written by get_attribute(head, attribute, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "If get_attribute returns PKCS11_RV_NOT_FOUND the function returns false"
      },
      {
        "kind": "assert",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) ensures expected success in non-not-found case"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1928,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Decision relies on attribute value obtained from head; if head contents are attacker-influenced this permits or denies operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "if (!get_bool(head, attr)) { return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases various callers' obj->attributes or wrapping_key->attributes; origin is TA-held object attributes (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size) return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "size",
        "rhs": "value set by get_attribute_ptr(...,&size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size",
        "rhs": "incoming buffer size provided by caller; compared against size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
      },
      {
        "lhs": "attr (caller buffer contents)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' originates from callers' obj->attributes or similar (TEE-private object state) and is forwarded into get_attribute.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: attr_size pointer aliases caller-provided size (e.g., &size in caller); used to check and report required size back to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "TEE_MemMove copies attribute bytes from attr_ptr (derived from object attrs) into caller buffer 'attr'; attr_ptr content origin may be TA-private object data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptr to return correct size and pointer; if get_attribute_ptr is influenced, callers may receive unexpected attribute data.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed by address to get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, attr_size, size",
        "rhs": "populated by get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "return from get_attribute_ptrs (propagated back)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count == 0 -> NOT_FOUND, count != 1 -> GENERAL_ERROR, else OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases callers' object attributes (origin TEE-private object state).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' is an out-parameter that will receive a pointer into attribute storage; caller supplied pointer origin varies (caller stack or variable).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=pointer"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 156,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' is caller-provided size pointer used to return attribute size; its value influences downstream buffer checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 160,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Function trusts get_attribute_ptrs to produce a single valid pointer/count and uses count checks to decide; malformed attr lists may bypass expectations.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "max_found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (from serialized entry)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-120"
      },
      {
        "lhs": "attr_ptr[*]",
        "rhs": "cur + sizeof(pkcs11_ref) when pkcs11_ref.id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes discovered)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "Loop iterates while cur < end and advances by next_off computed from pkcs11_ref.size"
      },
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110-111,140-141,150",
        "evidence": "Uses max_found and breaks when found == max_found, writes back found into *count"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 107,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases callers' object attribute container (object state) and is used for internal parsing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size from serialized data to compute next_off and advance cur without validating size limits beyond end check; malformed size may cause logic errors.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "TEE_MemMove reads a pkcs11_attribute_head from cur (parsed from head); that parsed header controls subsequent pointer arithmetic.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Out-parameters 'attr' and 'attr_size' are populated with pointers/sizes derived from head; these pointers later escape to callers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=pointer"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; } if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If parsing overruns end, code calls TEE_Panic which aborts execution; this is a hard failure on malformed data.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst[0..n-1]",
        "rhs": "src[0..n-1] copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353-354",
        "evidence": "Callsite uses MIN(pkcs11_ref.size, sizeof(data)) to limit copy length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Parses serialized attribute header by copying from 'cur' into local pkcs11_ref; src originates from head payload and controls next_off used for pointer arithmetic.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr (object storage) into caller buffer 'attr'; attr may be caller-provided and thus the copy can expose TA-held data if attr is REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized payload into a small local buffer; relies on pkcs11_ref.size parsed from data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies head struct from external 'ref' into local 'head' without validating origin; malformed or attacker-influenced 'ref' may affect subsequent logic.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from 'cur' without ensuring cur+sizeof(pkcs11_ref) <= end; parsed pkcs11_ref.size (from that copy) is later used to advance cur, enabling out-of-bounds read and control of next_off.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "object attribute buffer 'head' (may be TA-private or attacker-controlled serialized payload in some call paths)",
      "propagation_path": [
        "head -> cur = (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "pkcs11_ref.size -> next_off = sizeof(pkcs11_ref) + pkcs11_ref.size (used to advance cur) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      ],
      "sink": "TEE_MemMove reading header at cur into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized attribute blob reachable as 'head' (e.g., via earlier TEE_MemMove from REE to local head).",
        "Crafted pkcs11_ref.size and placement such that cur is near end and sizeof(pkcs11_ref) bytes cross buffer boundary."
      ],
      "attack_scenario": "Provide a serialized attributes blob with manipulated sizes so that the MemMove reads beyond the intended buffer, causing out-of-bounds read or TEE_Panic, potentially crashing the TA or leaking memory.",
      "impact": "Information disclosure of adjacent memory or denial-of-service (panic/crash) in TA; extent depends on whether source originates from REE or TA-private buffers."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure (cur + sizeof(pkcs11_ref)) <= end before calling TEE_MemMove, and validate pkcs11_ref.size against remaining buffer before advancing cur."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Sanitize pkcs11_ref.size (e.g., impose max reasonable attribute size) and reject malformed entries rather than trusting serialized sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove at line 119 occurs before any check that would ensure room for sizeof(pkcs11_ref)",
        "Subsequent code uses parsed pkcs11_ref.size to control pointer arithmetic (next_off), enabling exploitation"
      ],
      "negative_indicators": [
        "Loop condition 'cur < end' exists, but does not guarantee room for sizeof(pkcs11_ref) read",
        "Typical callers may supply TEE-private 'head' constructed by TA, not REE"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy reads a fixed-size header from a cursor derived from a buffer end computed from head->attrs_size but does not verify that the full header fits; this is a classic out-of-bounds read risk (CWE-125) enabling crash or data leakage.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "MemMove reads sizeof(pkcs11_ref) from cur without ensuring the header is fully inside head->attrs_size bounds."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "Loop guards on cur < end and later check if cur > end then TEE_Panic"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Often TA-owned object attributes buffer",
      "evidence": "passed from internal object state in many callers"
    },
    {
      "arg": "head (serialized ref call paths)",
      "why_safe": "Not always safe; may originate from REE via earlier TEE_MemMove into local head",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
    }
  ],
  "residual_risks": [
    "Line 187: copying attribute bytes into caller buffer (TEE_MemMove(attr,...)) can expose TA-private data to REE when attr is REE-visible; consider access control and explicit destination-region checks."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy without header-fit check",
      "Parsed size used to advance cursor"
    ],
    "negative_indicators": [
      "Loop has cur<end guard and a panic on overrun, but check occurs after the copy"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety concern (out-of-bounds read) is the primary issue; it is present because the header is copied before verifying room for it. Fixing the bounds check before copy eliminates the immediate vulnerability and also reduces downstream disclosure/logic risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "why": "Copies attribute bytes from object storage into caller buffer; if caller buffer is REE-visible this can disclose TA-held data.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "why": "If parsing overruns end the code calls TEE_Panic(0) which is a hard failure on malformed data.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies a bounded portion of serialized data into a small local buffer using MIN; relies on parsed size.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    }
  ]
}
フロー #33: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_secret_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_secret_keyget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 231.49秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: caller-supplied params memref (params -> template/head) originating from REE

シンク: TEE_MemMove copying header from cur into stack-local pkcs11_ref

判定理由: The memmove reads a fixed header size from a buffer region computed from untrusted attrs_size without confirming sufficient remaining bytes; this is a clear out-of-bounds read risk (CWE-125) and can lead to panic or memory corruption.

信頼度: HIGH

LLM対話履歴 (18 メッセージ)

関数: check_attrs_against_modification
プロンプト 中間 (check_attrs_against_modification)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attrs_against_modification” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1055, 1171]:
-- Call #1 at line 1055 --
1053:
1054:
1055: >>> rc = check_attrs_against_modification(session, head, obj, function);
1056: if (rc)
1057: goto out;
-- Call #2 at line 1171 --
1169:
1170:
1171: >>> rc = check_attrs_against_modification(session, head, obj, function);
1172: if (rc)
1173: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2361: enum pkcs11_rc check_attrs_against_modification(struct pkcs11_session *session,
2362: struct obj_attrs *head,
2363: struct pkcs11_object *obj,
2364: enum processing_func function)
2365: { 2366: enum pkcs11_class_id class = PKCS11_CKO_UNDEFINED_ID; 2367: char *cur = NULL; 2368: char *end = NULL; 2369: size_t len = 0; 2370: 2371: class = get_class(obj->attributes); 2372: 2373: cur = (char *)head + sizeof(struct obj_attrs); 2374: end = cur + head->attrs_size; 2375: 2376: for (; cur < end; cur += len) { 2377: 2378: struct pkcs11_attribute_head cli_ref = { }; 2379: 2380: TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); 2381: len = sizeof(cli_ref) + cli_ref.size; 2382: 2383: 2384: if (attribute_is_hidden(&cli_ref)) 2385: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 2386: 2387: 2392: if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL, 2393: NULL) == PKCS11_RV_NOT_FOUND) 2394: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 2395: 2396: 2397: if (!attribute_is_modifiable(session, &cli_ref, obj, class, 2398: function)) 2399: return PKCS11_CKR_ATTRIBUTE_READ_ONLY; 2400: 2401: 2406: if (function == PKCS11_FUNCTION_MODIFY) 2407: continue; 2408: 2409: 2413: if (cli_ref.id == PKCS11_CKA_TOKEN && 2414: get_bool(head, PKCS11_CKA_TOKEN)) { 2415: if (!pkcs11_session_is_read_write(session)) { 2416: DMSG("Can't copy to token in a RO session"); 2417: return PKCS11_CKR_SESSION_READ_ONLY; 2418: } 2419: } 2420: 2421: if (cli_ref.id == PKCS11_CKA_PRIVATE) { 2422: bool parent_priv = 2423: get_bool(obj->attributes, cli_ref.id); 2424: bool obj_priv = get_bool(head, cli_ref.id); 2425: 2426: 2430: if (!parent_priv && obj_priv) { 2431: if ((pkcs11_session_is_public(session) || 2432: pkcs11_session_is_so(session))) 2433: return PKCS11_CKR_USER_NOT_LOGGED_IN; 2434: } 2435: 2436: 2440: if (parent_priv && !obj_priv) 2441: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 2442: } 2443: } 2444: 2445: return PKCS11_CKR_OK; 2446: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attrs_against_modification", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attrs_against_modification", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attrs_against_modification)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attrs_against_modification",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "cli_ref",
      "cli_ref.size",
      "len",
      "obj",
      "session"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2373"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2374"
      },
      {
        "lhs": "cli_ref",
        "rhs": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)) (bytes read from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380-2381"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(cli_ref) + cli_ref.size (cli_ref.size derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2381"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2376",
        "evidence": "for (; cur < end; cur += len) loop uses cur<end as loop bound"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1055,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "alias of caller session pointer passed into callee; session origin is upstream and may be tainted/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1055,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "alias of caller-provided head (attributes list) passed into callee; head was created from template derived from REE memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1055,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "alias of callee obj pointer passed in; obj is a TA-managed object (TEE-private) but originated from handle derived earlier",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "rule": "weak_input_validation",
      "why": "reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating that sizeof(cli_ref)+cli_ref.size stays within end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    }
  ]
}

関数: attribute_is_modifiable
プロンプト 中間 (attribute_is_modifiable)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attribute_is_modifiable” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2397]:
-- Call #1 at line 2397 --
2395:
2396:
2397: >>> if (!attribute_is_modifiable(session, &cli_ref, obj, class,
2398: function))
2399: return PKCS11_CKR_ATTRIBUTE_READ_ONLY;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2304: static bool attribute_is_modifiable(struct pkcs11_session *session,
2305: struct pkcs11_attribute_head *req_attr,
2306: struct pkcs11_object *obj,
2307: enum pkcs11_class_id class,
2308: enum processing_func function)
2309: { 2310: 2311: switch (req_attr->id) { 2312: case PKCS11_CKA_LABEL: 2313: return true; 2314: case PKCS11_CKA_TOKEN: 2315: case PKCS11_CKA_MODIFIABLE: 2316: case PKCS11_CKA_DESTROYABLE: 2317: case PKCS11_CKA_PRIVATE: 2318: return function == PKCS11_FUNCTION_COPY; 2319: case PKCS11_CKA_COPYABLE: 2320: 2327: return get_bool(obj->attributes, req_attr->id); 2328: default: 2329: break; 2330: } 2331: 2332: 2333: switch (class) { 2334: case PKCS11_CKO_SECRET_KEY: 2335: case PKCS11_CKO_PUBLIC_KEY: 2336: case PKCS11_CKO_PRIVATE_KEY: 2337: if (attr_is_modifiable_any_key(req_attr)) 2338: return true; 2339: if (class == PKCS11_CKO_SECRET_KEY && 2340: attr_is_modifiable_secret_key(req_attr, session, obj)) 2341: return true; 2342: if (class == PKCS11_CKO_PUBLIC_KEY && 2343: attr_is_modifiable_public_key(req_attr, session, obj)) 2344: return true; 2345: if (class == PKCS11_CKO_PRIVATE_KEY && 2346: attr_is_modifiable_private_key(req_attr, session, obj)) 2347: return true; 2348: break; 2349: case PKCS11_CKO_DATA: 2350: 2351: return false; 2352: case PKCS11_CKO_CERTIFICATE: 2353: return attr_is_modifiable_certificate(req_attr, session, obj); 2354: default: 2355: break; 2356: } 2357: 2358: return false; 2359: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attribute_is_modifiable", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attribute_is_modifiable", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attribute_is_modifiable)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attribute_is_modifiable",
    "tainted_vars": [
      "session",
      "req_attr",
      "req_attr->id",
      "obj",
      "class",
      "function"
    ],
    "propagation": [
      {
        "lhs": "req_attr->id",
        "rhs": "req_attr (caller-supplied attribute header) deref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311"
      },
      {
        "lhs": "return value",
        "rhs": "switch(req_attr->id) / class-specific helper checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311-2358"
      },
      {
        "lhs": "helper results (e.g., attr_is_modifiable_* )",
        "rhs": "req_attr, session, obj",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2337-2347"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311-2318",
        "evidence": "switch on req_attr->id handles known attribute IDs explicitly"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2333-2356",
        "evidence": "switch on class applies class-specific rules"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1055,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "alias of caller session pointer passed into callee; session origin is upstream and may be tainted/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2311,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "alias of caller-provided req_attr (derived from REE-supplied head) used directly to switch on id",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "switch (req_attr->id) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1055,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "alias of obj pointer passed into callee; obj is TA-managed but originated from handle resolution upstream",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2337,
      "function": "attribute_is_modifiable",
      "rule": "weak_input_validation",
      "why": "class-specific helper checks rely on req_attr contents and session/obj state; if helpers trust req_attr fields without bounds/consistency checks this may be insufficiently validated",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=sizeof(req_attr),dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr_is_modifiable_any_key(req_attr)) return true; if (class == PKCS11_CKO_SECRET_KEY && attr_is_modifiable_secret_key(req_attr, session, obj)) return true;"
    }
  ]
}

関数: attr_is_modifiable_secret_key
プロンプト 中間 (attr_is_modifiable_secret_key)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_secret_key” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2340]:
-- Call #1 at line 2340 --
2338: return true;
2339: if (class == PKCS11_CKO_SECRET_KEY &&
2340: >>> attr_is_modifiable_secret_key(req_attr, session, obj))
2341: return true;
2342: if (class == PKCS11_CKO_PUBLIC_KEY &&

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2165: static bool attr_is_modifiable_secret_key(struct pkcs11_attribute_head *attr,
2166: struct pkcs11_session *session,
2167: struct pkcs11_object *obj)
2168: { 2169: switch (attr->id) { 2170: case PKCS11_CKA_ENCRYPT: 2171: case PKCS11_CKA_DECRYPT: 2172: case PKCS11_CKA_SIGN: 2173: case PKCS11_CKA_VERIFY: 2174: case PKCS11_CKA_WRAP: 2175: case PKCS11_CKA_UNWRAP: 2176: return true; 2177: 2178: case PKCS11_CKA_EXTRACTABLE: 2179: return get_bool(obj->attributes, attr->id); 2180: 2181: case PKCS11_CKA_SENSITIVE: 2182: case PKCS11_CKA_WRAP_WITH_TRUSTED: 2183: return !get_bool(obj->attributes, attr->id); 2184: 2185: case PKCS11_CKA_TRUSTED: 2186: return pkcs11_session_is_so(session); 2187: case PKCS11_CKA_NEVER_EXTRACTABLE: 2188: case PKCS11_CKA_ALWAYS_SENSITIVE: 2189: return false; 2190: default: 2191: return false; 2192: } 2193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_secret_key", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_secret_key", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_secret_key)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_secret_key",
    "tainted_vars": [
      "attr",
      "attr->id",
      "session",
      "obj"
    ],
    "propagation": [
      {
        "lhs": "attr->id",
        "rhs": "attr (caller-supplied attribute header) deref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2176"
      },
      {
        "lhs": "return value",
        "rhs": "switch(attr->id) returns based on known IDs or queries obj/session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2192"
      },
      {
        "lhs": "get_bool(obj->attributes, attr->id)",
        "rhs": "obj->attributes and attr->id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2178-2183"
      },
      {
        "lhs": "pkcs11_session_is_so(session)",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2185-2186"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2176",
        "evidence": "switch handles explicit attribute IDs and returns for known cases"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "alias of caller-provided attr pointer passed into callee; attr was derived from head which ultimately traces to REE-supplied memref",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "alias of caller session pointer passed into callee; session was obtained earlier from serialargs and its provenance is TA-managed but originates from caller-supplied handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "alias of obj pointer passed into callee; obj is TA-managed but derived from a handle resolved earlier",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2178,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "uses obj->attributes and attr->id to decide modifiability (get_bool), relying on object state without additional validation of attr contents",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=sizeof(obj->attributes),dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_secret_key at lines [2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 2179 --
2177:
2178: case PKCS11_CKA_EXTRACTABLE:
2179: >>> return get_bool(obj->attributes, attr->id);
2180:
2181: case PKCS11_CKA_SENSITIVE:
-- Call #2 at line 2183 --
2181: case PKCS11_CKA_SENSITIVE:
2182: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> return !get_bool(obj->attributes, attr->id);
2184:
2185: case PKCS11_CKA_TRUSTED:
-- Call #3 at line 2237 --
2235:
2236: case PKCS11_CKA_EXTRACTABLE:
2237: >>> return get_bool(obj->attributes, attr->id);
2238:
2239: case PKCS11_CKA_SENSITIVE:
-- Call #4 at line 2241 --
2239: case PKCS11_CKA_SENSITIVE:
2240: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> return !get_bool(obj->attributes, attr->id);
2242: case PKCS11_CKA_NEVER_EXTRACTABLE:
2243: case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #5 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #6 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #7 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #8 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output of get_attribute written into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool if rc == PKCS11_CKR_OK, false if PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "handles PKCS11_RV_NOT_FOUND returning false and assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2179,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes (TA-managed attributes) passed to get_bool from attr_is_modifiable_secret_key",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2183,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed to get_bool (negated result used) from attr_is_modifiable_secret_key",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return !get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2237,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool from other attribute-handling code path",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2241,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool (negated) in attribute checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return !get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2327,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed to get_bool from check_attrs_against_modification",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head (attributes list) passed into get_bool; head was built from template earlier and may contain REE-origin data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool to obtain parent_priv; obj->attributes is TA-managed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head passed into get_bool to obtain obj_priv; head may contain attributes derived from caller-controlled template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size (when attr_size provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (output buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) (copies from attr_ptr into caller buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) set *attr_size=size and return PKCS11_CKR_BUFFER_TOO_SMALL"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178,186",
        "evidence": "get_attribute_ptr return checked (rc) before using attr_ptr; attr is optional (checked before TEE_MemMove)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided head passed into get_attribute; origin may be TA-private or REE-derived depending on call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller buffer pointer (&bbool) passed as attr into get_attribute (alias of stack buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller-provided attr_size pointer (&size) passed into get_attribute (used for bounds decision)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "copies size bytes from attr_ptr into attr via TEE_MemMove where size is derived from get_attribute_ptr; limited bounds check only compares caller-provided *attr_size and may not validate attr_ptr provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed-by-ref into get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, size (out)",
        "rhs": "populated by get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "returned status based on count after get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks count==0 -> NOT_FOUND, count!=1 -> GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller-provided head passed into get_attribute_ptr at call-site; origin depends on caller (obj->attributes in many callers) and may be TA-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of candidate passed as head at this call-site; candidate provenance uncertain (could be REE-derived or TA-managed)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of *head passed in at this call-site; *head may be modified just prior and provenance may include REE-derived template data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "relies on get_attribute_ptrs to populate attr_ptr/attr_size and count; function only validates count values, not provenance or consistency of attr_ptr/attr_size",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "next_off",
      "found",
      "attr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads bytes from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr / attr_size_ptr outputs",
        "rhs": "set from cur + sizeof(pkcs11_ref) and pkcs11_ref.size when attribute matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "set to found at function end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop for (; cur < end; cur += next_off) uses cur<end as loop bound and breaks when found==max_found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided head passed in; head.attrs_size controls loop bounds and may originate from REE-derived data at earlier steps",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided attr pointer array passed in (attr) to receive pointers into head; these pointers will reference head's memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided attr_size array passed in to receive sizes (attr_size_ptr) influenced by pkcs11_ref.size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads attribute header from cur and uses pkcs11_ref.size to compute next_off and to set pointers/sizes without fully validating that the computed offsets lie within end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "function panics if cur > end (TEE_Panic) which can be triggered by malformed pkcs11_ref.size from untrusted input",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "bytes copied from src",
        "site": "semantic:TEE_MemMove"
      },
      {
        "lhs": "dst (caller-visible)",
        "rhs": "TEE_MemMove(dst, src, n) where src provenance may be caller-controlled",
        "site": "various callers (e.g., attributes.c:119,187,220,265)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur (derived from head which may contain REE-supplied data) into stack struct; size used later (pkcs11_ref.size) is attacker-influenced if cur is untrusted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute bytes from attr_ptr (points into head) into caller buffer; size is derived from attr metadata and may be larger than caller buffer if not validated by caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur into local header; subsequent use of cli_head.size influences loop offsets and pointer arithmetic based on possibly untrusted data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local struct; ref_attr provenance may be internal or external depending on call-site (used for reference comparisons).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size_or_unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr prior to querying attribute pointer; the ref structure guides subsequent attribute lookup and may be attacker-influenced.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into prefix2 (both likely TA buffers); operation appears internal and not REE-driven but still performs raw memory copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies small sample bytes from attribute payload into local data array using pkcs11_ref.size as bound; if pkcs11_ref.size is untrusted, MIN is used but initial header read may be malformed.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head struct from ref into local head; ref provenance uncertain and head.attrs_count is used later to branch.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; source may be external but the copy itself is an internal memory move used for message composition.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur into local struct without proving (end - cur) >= sizeof(pkcs11_ref); cur and end are derived from head->attrs_size which may be REE-controlled, enabling an out-of-bounds read or panic.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-supplied params memref (params -> template/head) originating from REE",
      "propagation_path": [
        "params[0].memref.buffer -> template (entry_set_attribute_value) :/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004",
        "template -> head (create_attributes_from_template) :/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1047-1052",
        "head->attrs_size -> get_attribute_ptrs cur/end calculation :/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) sink :/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove copying header from cur into stack-local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed serialized attributes in the memref buffer used as template/head",
        "head->attrs_size is small or crafted so that end - cur < sizeof(pkcs11_ref)"
      ],
      "attack_scenario": "Provide a template whose attrs_size or contents make cur point near or beyond end; when get_attribute_ptrs executes the loop it will TEE_MemMove sizeof(pkcs11_ref) from cur, causing out-of-bounds read or triggering TEE_Panic via later checks.",
      "impact": "Denial of service (TEE_Panic) or memory disclosure/undefined behavior depending on platform protections"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (end - cur) >= sizeof(pkcs11_attribute_head) before calling TEE_MemMove; reject or truncate malformed entries."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate pkcs11_ref.size against remaining buffer and reasonable limits before using it to compute offsets."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove of fixed sizeof(header) from cur where cur/end derived from untrusted head->attrs_size",
        "No explicit (end - cur) >= sizeof(header) check before the copy"
      ],
      "negative_indicators": [
        "Loop condition cur < end provides some protection but does not ensure a full header fits",
        "Later panic if cur > end indicates detection but occurs after the unsafe copy"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove reads a fixed header size from a buffer region computed from untrusted attrs_size without confirming sufficient remaining bytes; this is a clear out-of-bounds read risk (CWE-125) and can lead to panic or memory corruption.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies pkcs11_attribute_head from cur without ensuring the full header lies within the serialized attribute buffer (end - cur >= sizeof(pkcs11_ref))."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop condition for (; cur < end; cur += next_off) uses cur<end as loop bound"
    }
  ],
  "argument_safety": [
    {
      "arg": "head->attrs_size",
      "why_safe": "not fully safe",
      "evidence": "Used to compute end but no per-copy check for sizeof(header) before memmove :attributes.c:107-119"
    },
    {
      "arg": "attr (output pointers)",
      "why_safe": "partial",
      "evidence": "Pointers into head are written only when matches found; caller must validate sizes before dereferencing (get_attribute checks buffer sizes later)"
    }
  ],
  "residual_risks": [
    "line 119: memory-safety issue suppresses reporting of other classes (e.g., information disclosure) on this line because out-of-bounds read is primary risk"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size memmove from untrusted-derived pointer without size check"
    ],
    "negative_indicators": [
      "Loop bound exists (cur < end) but insufficient to guarantee full header fit"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the code performs an unchecked fixed-size read from a region whose remaining size is controlled by untrusted data; this is a concrete vulnerability (CWE-125).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads attribute header from cur and uses pkcs11_ref.size to compute offsets without proving the header fully fits inside the remaining buffer; malformed attrs_size can trigger OOB read or panic.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "why": "Function calls TEE_Panic if cur > end, which is triggered by malformed sizes from untrusted input; this is a denial-of-service risk.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "why": "Copies attribute payload into caller buffer where size originates from attribute metadata; insufficient provenance checks may allow buffer-too-small conditions upstream.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #34: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_secret_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_secret_keyget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 272.27秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE‑125

深刻度: MEDIUM

テイントフロー:

ソース: caller-provided serialized attributes buffer (head -> cur) derived from REE input

シンク: TEE_MemMove copying header into local pkcs11_ref at get_attribute_ptrs:119

判定理由: The copy reads a fixed-size header from a cursor into which only a weak bound (cur < end) is tested; this permits an out-of-bounds read or attacker-controlled header.size that influences subsequent parsing, meeting the memory-safety failure criterion.

信頼度: HIGH

LLM対話履歴 (18 メッセージ)

関数: check_attrs_against_modification
プロンプト 中間 (check_attrs_against_modification)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attrs_against_modification” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1171]:
-- Call #1 at line 1171 --
1169:
1170:
1171: >>> rc = check_attrs_against_modification(session, head, obj, function);
1172: if (rc)
1173: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2361: enum pkcs11_rc check_attrs_against_modification(struct pkcs11_session *session,
2362: struct obj_attrs *head,
2363: struct pkcs11_object *obj,
2364: enum processing_func function)
2365: { 2366: enum pkcs11_class_id class = PKCS11_CKO_UNDEFINED_ID; 2367: char *cur = NULL; 2368: char *end = NULL; 2369: size_t len = 0; 2370: 2371: class = get_class(obj->attributes); 2372: 2373: cur = (char *)head + sizeof(struct obj_attrs); 2374: end = cur + head->attrs_size; 2375: 2376: for (; cur < end; cur += len) { 2377: 2378: struct pkcs11_attribute_head cli_ref = { }; 2379: 2380: TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); 2381: len = sizeof(cli_ref) + cli_ref.size; 2382: 2383: 2384: if (attribute_is_hidden(&cli_ref)) 2385: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 2386: 2387: 2392: if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL, 2393: NULL) == PKCS11_RV_NOT_FOUND) 2394: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID; 2395: 2396: 2397: if (!attribute_is_modifiable(session, &cli_ref, obj, class, 2398: function)) 2399: return PKCS11_CKR_ATTRIBUTE_READ_ONLY; 2400: 2401: 2406: if (function == PKCS11_FUNCTION_MODIFY) 2407: continue; 2408: 2409: 2413: if (cli_ref.id == PKCS11_CKA_TOKEN && 2414: get_bool(head, PKCS11_CKA_TOKEN)) { 2415: if (!pkcs11_session_is_read_write(session)) { 2416: DMSG("Can't copy to token in a RO session"); 2417: return PKCS11_CKR_SESSION_READ_ONLY; 2418: } 2419: } 2420: 2421: if (cli_ref.id == PKCS11_CKA_PRIVATE) { 2422: bool parent_priv = 2423: get_bool(obj->attributes, cli_ref.id); 2424: bool obj_priv = get_bool(head, cli_ref.id); 2425: 2426: 2430: if (!parent_priv && obj_priv) { 2431: if ((pkcs11_session_is_public(session) || 2432: pkcs11_session_is_so(session))) 2433: return PKCS11_CKR_USER_NOT_LOGGED_IN; 2434: } 2435: 2436: 2440: if (parent_priv && !obj_priv) 2441: return PKCS11_CKR_TEMPLATE_INCONSISTENT; 2442: } 2443: } 2444: 2445: return PKCS11_CKR_OK; 2446: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attrs_against_modification", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attrs_against_modification", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attrs_against_modification)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attrs_against_modification",
    "tainted_vars": [
      "session",
      "head",
      "obj",
      "cur",
      "end",
      "len",
      "cli_ref"
    ],
    "propagation": [
      {
        "lhs": "class",
        "rhs": "get_class(obj->attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2371"
      },
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2373"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2374"
      },
      {
        "lhs": "cli_ref",
        "rhs": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)) reading bytes from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380-2381"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(cli_ref) + cli_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2381-2381"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2376-2376",
        "evidence": "loop condition uses cur < end where end computed from head->attrs_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases session derived from caller (originates from ctrl buffer -> possible REE influence)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases attributes built from template that originated from REE-supplied ctrl buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=ctrl->memref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "check_attrs_against_modification",
      "rule": "other",
      "why": "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct pkcs11_object *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_attrs_against_modification(session, head, obj, function);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "rule": "weak_input_validation",
      "why": "Parses client-supplied attribute entries from 'head' (derived from caller) with len computed from untrusted cli_ref.size; loop uses cur < end but cli_ref.size not validated against remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    }
  ]
}

関数: attribute_is_modifiable
プロンプト 中間 (attribute_is_modifiable)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attribute_is_modifiable” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2397]:
-- Call #1 at line 2397 --
2395:
2396:
2397: >>> if (!attribute_is_modifiable(session, &cli_ref, obj, class,
2398: function))
2399: return PKCS11_CKR_ATTRIBUTE_READ_ONLY;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2304: static bool attribute_is_modifiable(struct pkcs11_session *session,
2305: struct pkcs11_attribute_head *req_attr,
2306: struct pkcs11_object *obj,
2307: enum pkcs11_class_id class,
2308: enum processing_func function)
2309: { 2310: 2311: switch (req_attr->id) { 2312: case PKCS11_CKA_LABEL: 2313: return true; 2314: case PKCS11_CKA_TOKEN: 2315: case PKCS11_CKA_MODIFIABLE: 2316: case PKCS11_CKA_DESTROYABLE: 2317: case PKCS11_CKA_PRIVATE: 2318: return function == PKCS11_FUNCTION_COPY; 2319: case PKCS11_CKA_COPYABLE: 2320: 2327: return get_bool(obj->attributes, req_attr->id); 2328: default: 2329: break; 2330: } 2331: 2332: 2333: switch (class) { 2334: case PKCS11_CKO_SECRET_KEY: 2335: case PKCS11_CKO_PUBLIC_KEY: 2336: case PKCS11_CKO_PRIVATE_KEY: 2337: if (attr_is_modifiable_any_key(req_attr)) 2338: return true; 2339: if (class == PKCS11_CKO_SECRET_KEY && 2340: attr_is_modifiable_secret_key(req_attr, session, obj)) 2341: return true; 2342: if (class == PKCS11_CKO_PUBLIC_KEY && 2343: attr_is_modifiable_public_key(req_attr, session, obj)) 2344: return true; 2345: if (class == PKCS11_CKO_PRIVATE_KEY && 2346: attr_is_modifiable_private_key(req_attr, session, obj)) 2347: return true; 2348: break; 2349: case PKCS11_CKO_DATA: 2350: 2351: return false; 2352: case PKCS11_CKO_CERTIFICATE: 2353: return attr_is_modifiable_certificate(req_attr, session, obj); 2354: default: 2355: break; 2356: } 2357: 2358: return false; 2359: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attribute_is_modifiable", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attribute_is_modifiable", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attribute_is_modifiable)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attribute_is_modifiable",
    "tainted_vars": [
      "session",
      "req_attr",
      "obj",
      "req_attr->id"
    ],
    "propagation": [
      {
        "lhs": "req_attr->id",
        "rhs": "caller-provided cli_ref (from head buffer parsed earlier)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311-2311"
      },
      {
        "lhs": "return value decisions",
        "rhs": "switch on req_attr->id and checks against class/session/obj",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311-2356"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2311-2318",
        "evidence": "switch limits handling for specific attribute IDs (explicit cases)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases session derived earlier (origin traces to ctrl buffer/session lookup)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "Call-site binding: 'req_attr' (&cli_ref) aliases parsed attribute header coming from REE-supplied head buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1171,
      "function": "attribute_is_modifiable",
      "rule": "other",
      "why": "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct pkcs11_object *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!attribute_is_modifiable(session, &cli_ref, obj, class, function))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2311,
      "function": "attribute_is_modifiable",
      "rule": "weak_input_validation",
      "why": "Decision logic uses req_attr->id (from untrusted parsed data) to control allowances; id-driven branches may allow changes without validating attribute payload/size",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(req_attr->id),src_sz=head->attrs_size,dst_sz=sizeof(req_attr->id)"
        ]
      },
      "code_excerpt": "switch (req_attr->id) { ... }"
    }
  ]
}

関数: attr_is_modifiable_secret_key
プロンプト 中間 (attr_is_modifiable_secret_key)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_secret_key” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2340]:
-- Call #1 at line 2340 --
2338: return true;
2339: if (class == PKCS11_CKO_SECRET_KEY &&
2340: >>> attr_is_modifiable_secret_key(req_attr, session, obj))
2341: return true;
2342: if (class == PKCS11_CKO_PUBLIC_KEY &&

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2165: static bool attr_is_modifiable_secret_key(struct pkcs11_attribute_head *attr,
2166: struct pkcs11_session *session,
2167: struct pkcs11_object *obj)
2168: { 2169: switch (attr->id) { 2170: case PKCS11_CKA_ENCRYPT: 2171: case PKCS11_CKA_DECRYPT: 2172: case PKCS11_CKA_SIGN: 2173: case PKCS11_CKA_VERIFY: 2174: case PKCS11_CKA_WRAP: 2175: case PKCS11_CKA_UNWRAP: 2176: return true; 2177: 2178: case PKCS11_CKA_EXTRACTABLE: 2179: return get_bool(obj->attributes, attr->id); 2180: 2181: case PKCS11_CKA_SENSITIVE: 2182: case PKCS11_CKA_WRAP_WITH_TRUSTED: 2183: return !get_bool(obj->attributes, attr->id); 2184: 2185: case PKCS11_CKA_TRUSTED: 2186: return pkcs11_session_is_so(session); 2187: case PKCS11_CKA_NEVER_EXTRACTABLE: 2188: case PKCS11_CKA_ALWAYS_SENSITIVE: 2189: return false; 2190: default: 2191: return false; 2192: } 2193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_secret_key", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_secret_key", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_secret_key)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_secret_key",
    "tainted_vars": [
      "attr",
      "session",
      "obj",
      "attr->id"
    ],
    "propagation": [
      {
        "lhs": "attr->id",
        "rhs": "caller-provided cli_ref (parsed from head buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2176"
      },
      {
        "lhs": "return decisions",
        "rhs": "switch on attr->id with calls to get_bool(obj->attributes, attr->id) and pkcs11_session_is_so(session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2192"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2169-2176",
        "evidence": "explicit case labels handle known attribute IDs"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter (&cli_ref) aliases parsed attribute header coming from REE-supplied head buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases session derived earlier (origin traces to ctrl/session lookup)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2340,
      "function": "attr_is_modifiable_secret_key",
      "rule": "other",
      "why": "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct pkcs11_object *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "attr_is_modifiable_secret_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2178,
      "function": "attr_is_modifiable_secret_key",
      "rule": "weak_input_validation",
      "why": "Uses attr->id (from untrusted input) to index into obj->attributes via get_bool without validating that id maps to a valid stored attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr->id),src_sz=head->attrs_size,dst_sz=sizeof(attr->id)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_secret_key at lines [2179, 2183, 2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 2179 --
2177:
2178: case PKCS11_CKA_EXTRACTABLE:
2179: >>> return get_bool(obj->attributes, attr->id);
2180:
2181: case PKCS11_CKA_SENSITIVE:
-- Call #2 at line 2183 --
2181: case PKCS11_CKA_SENSITIVE:
2182: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2183: >>> return !get_bool(obj->attributes, attr->id);
2184:
2185: case PKCS11_CKA_TRUSTED:
-- Call #3 at line 2237 --
2235:
2236: case PKCS11_CKA_EXTRACTABLE:
2237: >>> return get_bool(obj->attributes, attr->id);
2238:
2239: case PKCS11_CKA_SENSITIVE:
-- Call #4 at line 2241 --
2239: case PKCS11_CKA_SENSITIVE:
2240: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> return !get_bool(obj->attributes, attr->id);
2242: case PKCS11_CKA_NEVER_EXTRACTABLE:
2243: case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #5 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #6 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #7 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #8 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool (return)",
        "rhs": "value written by get_attribute into &bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-244",
        "evidence": "treats PKCS11_RV_NOT_FOUND specially and asserts rc == PKCS11_CKR_OK otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 2179,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: head parameter is obj->attributes (TA-private attributes structure) passed from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: head parameter aliases 'head' built from client-supplied template (originates from REE-provided ctrl buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute(head, attribute, ...) where 'attribute' may be attacker-controlled and mapping/size of stored attribute is not validated here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out/upd)",
        "rhs": "size (from get_attribute_ptr) / *attr_size if smaller -> PKCS11_CKR_BUFFER_TOO_SMALL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
      },
      {
        "lhs": "attr (written)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "checks *attr_size < size and returns PKCS11_CKR_BUFFER_TOO_SMALL after updating *attr_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter is alias of caller-provided attributes container; origin may be REE-visible (template) or TA-private (obj->attributes)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' points at caller buffer (&bbool) which is TA-local in this invocation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' is pointer to caller's size variable (used for bounds check and updated), here it's local to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer attr; size originates from stored attribute metadata and attr pointer provenance may be untrusted if caller passed REE-visible buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-158"
      },
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(...,&count) updated by helper",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      },
      {
        "lhs": "return code",
        "rhs": "checks on count (0 -> NOT_FOUND, !=1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "validates count is exactly 1 and returns appropriate error codes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided attributes container (may be REE-origin or TA-private) passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter receives pointer(s) into stored attributes (internal pointers) returned to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is updated with stored attribute size and used by callers for bounds checks/copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Delegates to get_attribute_ptrs which determines count and pointers; if helper returns unexpected count values callers rely on this function's limited checks",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120-120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "cur + sizeof(pkcs11_ref) and pkcs11_ref.size when matching attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "count",
        "rhs": "updated 'found' written to *count at end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150-150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop uses cur < end where end computed from head->attrs_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases caller-provided attributes container; origin may be REE-visible (template) or TA-private (obj->attributes)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter receives pointers into serialized attribute payloads (returned pointers alias bytes inside head)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is updated with per-attribute sizes derived from parsed pkcs11_ref.size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=pkcs11_ref.size,dst_sz=*attr_size_ptr"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' in/out parameter controls how many matches are returned and is used by caller for validation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=*count"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Copies attribute header from cur then uses pkcs11_ref.size to compute next_off without validating that pkcs11_ref.size keeps cur within bounds (next_off influences loop advance)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If parsed next_off causes cur to advance beyond end, code panics (TEE_Panic), creating denial-of-service on malformed input",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "multiple call-sites (see structural_risks entries)"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "multiple call-sites (see structural_risks entries)"
      },
      {
        "lhs": "len",
        "rhs": "caller-supplied length parameter",
        "site": "multiple call-sites (see structural_risks entries)"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "n/a",
        "evidence": "TEE_MemMove is a primitive copy; callers are expected to perform bounds/size checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute header from 'cur' (derived from head which may be REE-supplied) into local pkcs11_ref without validating pkcs11_ref.size before use",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from metadata; caller previously relied on get_attribute_ptr for size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur (parsed bytes) into local structure and then uses cli_head.size to compute len without explicit validation against remaining buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr (external data) into local structure and uses its size fields for subsequent checks",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr then uses pkcs11_ref.id/size to look up attributes; ref_attr provenance may be untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into prefix2 using prefix_len provided by caller; caller must ensure prefix_len bounds, otherwise memory corruption possible",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=prefix_len+1,dst_sz=prefix2_capacity"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref header from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from the following payload; header size used to bound copy but header itself came from untrusted data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies payload bytes into local 'data' buffer using MIN(pkcs11_ref.size, sizeof(data)); copy length derived from untrusted header but bounded by local buffer size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'head' from ref (serialized header) into local head without validating ref length first",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=ref_size,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into pre using strlen(prefix) (caller-controlled); if pre is NULL or undersized this may cause crash",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=pre_capacity"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies fixed-size header from 'cur' without ensuring cur + sizeof(pkcs11_ref) <= end; header-derived pkcs11_ref.size is then used to advance 'cur', allowing out-of-bounds reads or misparsing of serialized data.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-provided serialized attributes buffer (head -> cur) derived from REE input",
      "propagation_path": [
        "head (params/template) -> cur set to (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size uses unvalidated pkcs11_ref.size to advance cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      ],
      "sink": "TEE_MemMove copying header into local pkcs11_ref at get_attribute_ptrs:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed/short serialized attributes in head (via REE-controlled template/control buffer).",
        "No upstream validation ensuring remaining bytes >= sizeof(pkcs11_ref) before the copy."
      ],
      "attack_scenario": "Provide a truncated or crafted serialized attribute blob so that cur + sizeof(pkcs11_ref) exceeds end, causing the TEE to read beyond the buffer (over-read) or populate pkcs11_ref.size with attacker-controlled value, leading to incorrect parsing and potential further out-of-bounds memory operations or a panic (denial of service).",
      "impact": "Out-of-bounds read leading to misbehavior, possible information leakage, or subsequent memory corruption/denial-of-service (TEE_Panic) depending on how pkcs11_ref.size is used."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Before TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)), ensure (cur + sizeof(pkcs11_ref)) <= end and that pkcs11_ref.size is validated such that (cur + next_off) <= end before advancing."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145",
        "recommendation": "Avoid panicking on malformed input; return an error to caller instead of TEE_Panic, to prevent DoS."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of fixed-size header from cur where only cur < end is checked (not cur + sizeof(header) <= end).",
        "Subsequent use of header.size to compute next_off and advance cur, enabling cascading effects."
      ],
      "negative_indicators": [
        "Loop has cur < end which provides some protection if head->attrs_size == 0, but does not prevent partial header reads.",
        "Higher-level callers perform some checks (e.g., serialargs_remaining_bytes) in other code paths, but not here."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy reads a fixed-size header from a cursor into which only a weak bound (cur < end) is tested; this permits an out-of-bounds read or attacker-controlled header.size that influences subsequent parsing, meeting the memory-safety failure criterion.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies header from cur without verifying the full header fits in remaining bytes; header.size then drives parser advancement."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-115",
      "evidence": "loop condition uses cur < end where end = cur_base + head->attrs_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Not fully safe; head->attrs_size is used to compute end but code does not ensure sizeof(header) fits before copying",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-119"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses but does not rule out information-disclosure concerns where parsed fields later influence copies to REE-visible buffers."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of copy from untrusted buffer without full-size check.",
      "Subsequent use of attacker-controlled size field."
    ],
    "negative_indicators": [
      "Some loop-level bound exists (cur < end) reducing but not eliminating risk."
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety defect (insufficient bounds validation before fixed-size copy) is present at the sink; therefore the line is marked vulnerable under weak_input_validation (CWE-125).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "why": "If parsed next_off causes cur to advance beyond end, code calls TEE_Panic causing denial-of-service on malformed input.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out buffer (MEMREF_OUTPUT) — structural output exposure but not promoted to unencrypted_output.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies payload into local buffer bounded by MIN(header.size, local_size) — bounded but header itself came from untrusted input.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    }
  ]
}
フロー #35: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_private_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_private_keyget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 243.76秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-supplied serialised attributes buffer (params->memref.buffer → template → head)

シンク: TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur into local pkcs11_ref

判定理由: Memory-safety precedence: the memcpy-like call reads a fixed header size from a pointer derived from untrusted serialized data without verifying the header fits, yielding an OOB read/panic; this is a clear weak input validation bug.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: attr_is_modifiable_private_key
プロンプト 中間 (attr_is_modifiable_private_key)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_private_key” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2346]:
-- Call #1 at line 2346 --
2344: return true;
2345: if (class == PKCS11_CKO_PRIVATE_KEY &&
2346: >>> attr_is_modifiable_private_key(req_attr, session, obj))
2347: return true;
2348: break;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2214: static bool attr_is_modifiable_private_key(struct pkcs11_attribute_head *attr,
2215: struct pkcs11_session *sess __unused,
2216: struct pkcs11_object *obj)
2217: { 2218: switch (attr->id) { 2219: case PKCS11_CKA_SUBJECT: 2220: case PKCS11_CKA_DECRYPT: 2221: case PKCS11_CKA_SIGN: 2222: case PKCS11_CKA_SIGN_RECOVER: 2223: case PKCS11_CKA_UNWRAP: 2224: 2233: case PKCS11_CKA_PUBLIC_KEY_INFO: 2234: return true; 2235: 2236: case PKCS11_CKA_EXTRACTABLE: 2237: return get_bool(obj->attributes, attr->id); 2238: 2239: case PKCS11_CKA_SENSITIVE: 2240: case PKCS11_CKA_WRAP_WITH_TRUSTED: 2241: return !get_bool(obj->attributes, attr->id); 2242: case PKCS11_CKA_NEVER_EXTRACTABLE: 2243: case PKCS11_CKA_ALWAYS_SENSITIVE: 2244: return false; 2245: default: 2246: return false; 2247: } 2248: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_private_key", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_private_key", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_private_key)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_private_key",
    "tainted_vars": [
      "attr",
      "attr->id",
      "sess",
      "obj",
      "obj->attributes"
    ],
    "propagation": [
      {
        "lhs": "attr->id",
        "rhs": "attr (caller-provided attribute header) deref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2224"
      },
      {
        "lhs": "return value",
        "rhs": "switch (attr->id) cases and get_bool(obj->attributes, attr->id)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2247"
      },
      {
        "lhs": "get_bool result",
        "rhs": "obj->attributes and attr->id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2236-2237"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2247",
        "evidence": "switch on attr->id enumerates handled attribute IDs and returns defaults for others"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "alias of caller-provided req_attr pointer passed into callee; req_attr originates from head derived from REE-supplied buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "alias of caller session pointer passed into callee; session was obtained earlier from serialargs and may be tainted/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "alias of obj pointer passed into callee; obj is TA-managed but originates from handle resolution upstream",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2236,
      "function": "attr_is_modifiable_private_key",
      "rule": "weak_input_validation",
      "why": "uses attr->id (from REE-derived req_attr) to index get_bool(obj->attributes, attr->id) without additional bounds checks on id",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "case PKCS11_CKA_EXTRACTABLE: return get_bool(obj->attributes, attr->id);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_private_key at lines [2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 2237 --
2235:
2236: case PKCS11_CKA_EXTRACTABLE:
2237: >>> return get_bool(obj->attributes, attr->id);
2238:
2239: case PKCS11_CKA_SENSITIVE:
-- Call #2 at line 2241 --
2239: case PKCS11_CKA_SENSITIVE:
2240: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> return !get_bool(obj->attributes, attr->id);
2242: case PKCS11_CKA_NEVER_EXTRACTABLE:
2243: case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #3 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #4 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #5 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #6 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "buffer filled by get_attribute from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244",
        "evidence": "assert(rc == PKCS11_CKR_OK) after get_attribute indicates expected success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2237,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes (TA-managed) passed as head; origin is TA object attribute storage (not REE)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2241,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes (TA-managed) passed as head; used to read sensitive attribute flags",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return !get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2327,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed as head from TA object; origin TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head (attributes list) passed as head; head was derived earlier from REE-supplied template buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed as head; parent_priv read from TA-managed object attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head (attributes list) passed as head; head originates from REE-derived template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "calls get_attribute(head, ...) on caller-supplied head and trusts rc/assert without handling malicious head contents robustly",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "size",
      "attr",
      "attr_size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out) / return code",
        "rhs": "comparison of *attr_size and size and possible PKCS11_CKR_BUFFER_TOO_SMALL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
      },
      {
        "lhs": "attr (buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) when attr non-NULL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding: head pointer passed into get_attribute originates from caller (could be TA-private obj->attributes or REE-derived head); origin ambiguous here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding: attr argument (&bbool) is caller stack buffer (TA-private) passed into get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding: attr_size pointer (&size) is caller stack variable passed in to receive size information",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "copies size bytes from attr_ptr into caller buffer attr via TEE_MemMove relying on get_attribute_ptr-provided size without revalidating attr_ptr or that size matches caller buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-158"
      },
      {
        "lhs": "rc",
        "rhs": "count checks after get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "checks count==0 -> NOT_FOUND and count!=1 -> GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call-site: head argument originates from the caller and may be TA-private (obj->attributes) or REE-derived; origin ambiguous here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call-site: attr_ptr out-parameter receives pointer(s) into attribute storage returned by helper; origin depends on head contents",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call-site: attr_size out-parameter (&size) receives attribute size computed by helper; influences downstream copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call-site: candidate passed as head may be from iteration over attribute lists (origin unknown/possibly REE-derived)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call-site: dereferenced head element '*head' passed in may come from earlier modifications; origin ambiguous",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 153,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "delegates to get_attribute_ptrs and then trusts count semantics; if get_attribute_ptrs returns incorrect count or invalid pointers, callers may be misled",
      "sink_function": "get_attribute_ptrs",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count); if (!count) return PKCS11_RV_NOT_FOUND;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "next_off",
      "attr",
      "attr_size",
      "count",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads bytes from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into head buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*attr_size_ptr (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes discovered)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses for (; cur < end; cur += next_off) and breaks when found == max_found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding: head argument originates from caller and may be TA-private or REE-derived (ambiguous origin)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding: attr out-parameter receives pointers into the head buffer (aliases into head); origin depends on head contents",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads attribute header from cur and uses pkcs11_ref.size to compute next_off without fully validating that the claimed size keeps cur within end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "detects cur > end and calls TEE_Panic; malicious head->attrs_size or pkcs11_ref.size can trigger panic or OOB before this check",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=end - cur,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "assigns pointers (cur + sizeof(pkcs11_ref)) into output attr array when pkcs11_ref.size claimed by head may be attacker-controlled",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "destination buffer passed by caller (various call-sites)",
        "site": "multiple call-sites (see structural_risks)"
      },
      {
        "lhs": "src",
        "rhs": "source pointer passed by caller (various call-sites)",
        "site": "multiple call-sites (see structural_risks)"
      },
      {
        "lhs": "n",
        "rhs": "number of bytes requested to copy (size arguments or computed expressions)",
        "site": "multiple call-sites (see structural_risks)"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a low-level copy; callers must ensure sizes/regions are correct"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur (pointer into head buffer, often REE-derived) into local pkcs11_ref without validating that remaining length >= sizeof(pkcs11_ref)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (pointer into attribute storage) into caller buffer attr; relies on upstream attr_size checks to be correct",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads cli_head header from cur (head buffer) into local cli_head using sizeof(cli_head) without revalidating remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref header from ref_attr (reference buffer) into local pkcs11_ref; origin of ref_attr may be REE or TA-managed depending on caller",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size_or_remaining,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local struct before using its id/size; ref_attr provenance varies by caller",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size_or_remaining,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into preallocated prefix2 buffer; caller must ensure prefix_len+1 fits destination to avoid overflow",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix2_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header into pkcs11_ref from cur without rechecking remaining length; subsequent copy uses MIN(pkcs11_ref.size, sizeof(data)) but header read may be OOB",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes into fixed-size local array using MIN(pkcs11_ref.size, sizeof(data)); source pointer is cur + sizeof(pkcs11_ref) (may be REE-derived)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head struct from ref into local head via sizeof(head); ref provenance may be REE or TA-managed",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies prefix into pre buffer using strlen(prefix) without verifying destination pre size; if prefix is REE-controlled this can overflow",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=pre_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur (derived from head + offsets that can be REE-controlled) without ensuring remaining bytes >= sizeof(pkcs11_ref), enabling OOB read or panic.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-supplied serialised attributes buffer (params->memref.buffer → template → head)",
      "propagation_path": [
        "params[0].memref.buffer -> template (serialargs_alloc_get_attributes) @ object.c:1002",
        "template -> head (create_attributes_from_template) @ object.c:1047",
        "head -> get_attribute_ptrs cur/end setup @ attributes.c:107-108",
        "cur (from head) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed head.attrs_size and serialized data in params memref.",
        "cur positioned such that end - cur < sizeof(pkcs11_ref) yet loop condition cur < end holds (e.g., crafted sizes)."
      ],
      "attack_scenario": "Crafted serialised attribute buffer causes TEE_MemMove to read beyond buffer, potentially causing panic (TEE_Panic) or memory disclosure/crash depending on memory layout.",
      "impact": "Denial of service via panic/crash; potential information disclosure or memory-corruption depending on platform specifics."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (end - cur) >= sizeof(pkcs11_attribute_head) before reading the header; validate pkcs11_ref.size so next_off cannot wrap or exceed end."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Check pkcs11_ref.size for reasonable limits and for overflow when computing next_off = sizeof(...) + pkcs11_ref.size."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:130-138",
        "recommendation": "Ensure computed pointers (cur + sizeof(header)) are within [cur,end) before assigning into output arrays."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur and head->attrs_size to bound loop but no check that end - cur >= sizeof(pkcs11_ref) before header read",
        "TEE_MemMove uses a fixed sizeof(pkcs11_ref) read from cur"
      ],
      "negative_indicators": [
        "Loop condition cur < end exists (some bounding), but insufficient to guarantee header fits",
        "Later detection of cur > end leads to TEE_Panic which may limit exploitation to DoS"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: the memcpy-like call reads a fixed header size from a pointer derived from untrusted serialized data without verifying the header fits, yielding an OOB read/panic; this is a clear weak input validation bug.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads pkcs11_attribute_head from cur using sizeof(pkcs11_ref) without ensuring remaining bytes are sufficient."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop uses cur < end as loop bound and breaks when found == max_found"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "unknown",
      "evidence": "head may be TA-private (obj->attributes) or REE-derived (template); origin ambiguous"
    },
    {
      "arg": "cur",
      "why_safe": "unsafe",
      "evidence": "cur < end does not guarantee space for sizeof(header) at attributes.c:115-119"
    }
  ],
  "residual_risks": [
    "Line 119: memory-safety finding suppresses information-disclosure classification even though source is REE-visible; if exploit avoids panic, disclosure remains possible"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size read from potentially attacker-controlled buffer",
      "No explicit pre-read size check"
    ],
    "negative_indicators": [
      "Loop bound exists (cur < end) and later cur> end triggers panic"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The copy at line 119 performs an unchecked fixed-size read from a pointer into serialized data derived from untrusted input; this is a definite weak input validation / memory-safety issue (CWE-125) with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads header from cur and uses its size to advance without validating that header read and next_off remain within the serialized buffer; can cause OOB or panic.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=end - cur,dst_sz=NA"
        ]
      },
      "why": "cur > end check causes TEE_Panic; malformed sizes can trigger panic or OOB before this check.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}
フロー #36: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_private_key -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_private_keyget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 219.09秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: attributes buffer derived from caller serial args (REE-provided)

シンク: TEE_MemMove copies header from potentially attacker-controlled buffer into local struct

判定理由: Memory-safety issue (out-of-bounds read) is evident: copy length is fixed (sizeof header) while the check uses cur<end but does not ensure the full header fits, so attacker-controlled head can trigger unsafe read.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: attr_is_modifiable_private_key
プロンプト 中間 (attr_is_modifiable_private_key)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_private_key” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2346]:
-- Call #1 at line 2346 --
2344: return true;
2345: if (class == PKCS11_CKO_PRIVATE_KEY &&
2346: >>> attr_is_modifiable_private_key(req_attr, session, obj))
2347: return true;
2348: break;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2214: static bool attr_is_modifiable_private_key(struct pkcs11_attribute_head *attr,
2215: struct pkcs11_session *sess __unused,
2216: struct pkcs11_object *obj)
2217: { 2218: switch (attr->id) { 2219: case PKCS11_CKA_SUBJECT: 2220: case PKCS11_CKA_DECRYPT: 2221: case PKCS11_CKA_SIGN: 2222: case PKCS11_CKA_SIGN_RECOVER: 2223: case PKCS11_CKA_UNWRAP: 2224: 2233: case PKCS11_CKA_PUBLIC_KEY_INFO: 2234: return true; 2235: 2236: case PKCS11_CKA_EXTRACTABLE: 2237: return get_bool(obj->attributes, attr->id); 2238: 2239: case PKCS11_CKA_SENSITIVE: 2240: case PKCS11_CKA_WRAP_WITH_TRUSTED: 2241: return !get_bool(obj->attributes, attr->id); 2242: case PKCS11_CKA_NEVER_EXTRACTABLE: 2243: case PKCS11_CKA_ALWAYS_SENSITIVE: 2244: return false; 2245: default: 2246: return false; 2247: } 2248: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_private_key", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_private_key", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_private_key)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_private_key",
    "tainted_vars": [
      "attr",
      "sess",
      "obj",
      "attr->id"
    ],
    "propagation": [
      {
        "lhs": "attr->id",
        "rhs": "caller-provided cli_ref (parsed from head buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2218"
      },
      {
        "lhs": "return decisions",
        "rhs": "switch on attr->id with queries to obj->attributes (get_bool)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2247"
      },
      {
        "lhs": "get_bool(obj->attributes, attr->id)",
        "rhs": "reads attribute value from TA-private obj->attributes using attr->id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2236-2237"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2218-2247",
        "evidence": "explicit switch on attr->id enumerates handled attribute IDs"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter (&cli_ref) aliases parsed attribute header derived from REE-supplied head buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "Call-site binding: 'sess' parameter aliases session established earlier (origin traces to ctrl/session lookup)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2346,
      "function": "attr_is_modifiable_private_key",
      "rule": "other",
      "why": "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct pkcs11_object *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "attr_is_modifiable_private_key(req_attr, session, obj)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2236,
      "function": "attr_is_modifiable_private_key",
      "rule": "weak_input_validation",
      "why": "Uses untrusted attr->id (from parsed REE data) to decide modifiability and may call get_bool with that id without additional validation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr->id),src_sz=head->attrs_size,dst_sz=sizeof(attr->id)"
        ]
      },
      "code_excerpt": "case PKCS11_CKA_EXTRACTABLE: return get_bool(obj->attributes, attr->id);"
    }
  ]
}

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_private_key at lines [2237, 2241, 2327, 2414, 2423, 2424]:
-- Call #1 at line 2237 --
2235:
2236: case PKCS11_CKA_EXTRACTABLE:
2237: >>> return get_bool(obj->attributes, attr->id);
2238:
2239: case PKCS11_CKA_SENSITIVE:
-- Call #2 at line 2241 --
2239: case PKCS11_CKA_SENSITIVE:
2240: case PKCS11_CKA_WRAP_WITH_TRUSTED:
2241: >>> return !get_bool(obj->attributes, attr->id);
2242: case PKCS11_CKA_NEVER_EXTRACTABLE:
2243: case PKCS11_CKA_ALWAYS_SENSITIVE:
-- Call #3 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #4 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #5 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #6 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(bbool)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-237"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-239"
      },
      {
        "lhs": "return value",
        "rhs": "if rc==PKCS11_RV_NOT_FOUND -> false; else assert(rc==OK) and return bbool",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "explicit check for PKCS11_RV_NOT_FOUND and assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2237,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is obj->attributes (TA-private) when invoked from attr_is_modifiable_private_key",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2241,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is obj->attributes (TA-private) when used to negate sensitive flag",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return !get_bool(obj->attributes, attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2327,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is obj->attributes (TA-private) when consulted for direction checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is head (attributes constructed from template that originated from REE), so origin is REE-influenced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is obj->attributes (TA-private) when comparing parent_priv",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg is head (attributes derived from REE template) when reading obj_priv",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Calls get_attribute with attribute id potentially derived from untrusted input; result handling asserts rc==OK which may trigger on malformed inputs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc",
      "bbool"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-176"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size set from get_attribute_ptr and possibly written back to *attr_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-190"
      },
      {
        "lhs": "attr (output buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) when attr provided",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' originates from caller (may be REE-influenced or TA-private depending on call-site); passed into get_attribute_ptr which reads from it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attribute' id is derived from caller-parsed data and controls lookup in get_attribute_ptr",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attribute),src_sz=head->attrs_size,dst_sz=sizeof(attribute)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' (&bbool) is caller stack buffer (TA-local) provided to receive attribute value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from attr_ptr into caller buffer attr after size determined by metadata from get_attribute_ptr; attr_ptr provenance may be untrusted and size validation relies on attr_size check only",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size?*attr_size:unknown"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-156"
      },
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-158"
      },
      {
        "lhs": "rc",
        "rhs": "derived from count checks -> return codes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count==0 -> NOT_FOUND and count!=1 -> GENERAL_ERROR enforce expected single attribute"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided attributes buffer; provenance may be REE-visible or TA-private depending on caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-param will be set to pointer(s) inside 'head' (alias of head contents); region follows head's provenance",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=head->attrs_size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-param is written with attribute size from head; size is controlled by metadata in head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=head->attrs_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Delegates to get_attribute_ptrs which sets attr_ptr/attr_size and count based on head contents; insufficient validation of returned count/size could allow malformed head to influence downstream copies",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count (number of matches),src_sz=head->attrs_size,dst_sz=1"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading bytes from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120-120"
      },
      {
        "lhs": "attr_ptr / attr_size_ptr entries",
        "rhs": "set to cur + sizeof(pkcs11_ref) and pkcs11_ref.size when ids match",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop uses cur < end and advances by next_off computed from parsed size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases caller-provided attributes buffer; provenance may be REE-visible or TA-private and controls loop bounds",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-param will receive pointers into 'head' (aliases of head contents); region follows head's provenance",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=head->attrs_size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-param is written with sizes from parsed entries; sizes are controlled by metadata in head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=head->attrs_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref header from cur and uses pkcs11_ref.size to advance and to populate pointers without validating that size fits remaining buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If parsed next_off causes cur to exceed end the code calls TEE_Panic; lack of graceful handling of malformed head is a structural risk",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (n bytes copied)",
        "site": "generic:TEE_MemMove"
      },
      {
        "lhs": "taint(dest)",
        "rhs": "taint(src) propagated by copy",
        "site": "generic:TEE_MemMove"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref header from cur (parsed from head which may be REE-controlled) into local struct without validating remaining bytes against pkcs11_ref.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (pointer derived from head contents) into caller buffer attr; size originates from metadata and may be untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size?*attr_size:unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head header from cur (from head buffer) into local struct and then uses cli_head.size to advance/size entries without validating bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr into local struct; ref_attr provenance may be untrusted and size used later without full validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr into local struct before using pkcs11_ref.id/size for lookups; ref_attr may be attacker-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies prefix+1 bytes into prefix2 based on prefix_len computed earlier; source origin not validated here and destination sizing must be ensured by caller",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute header into local pkcs11_ref from cur (head-derived); then separately copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes into stack buffer — size driven by untrusted metadata",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute payload into small local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from untrusted header parsed earlier",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies serialized head from ref into head local via fixed-size copy; ref provenance may be untrusted and head.attrs_count used later",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies strlen(prefix) bytes into pre without shown bounds check; prefix origin may be untrusted leading to potential overflow or unexpected reads",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur (derived from head which may be REE-controlled) before verifying that cur+sizeof(pkcs11_ref) <= end; malformed head can cause out-of-bounds read.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "attributes buffer derived from caller serial args (REE-provided)",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_copy_object @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:310",
        "entry_copy_object parsed template/head from ctrl->memref.buffer @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1118",
        "head passed into get_attribute_ptrs as 'head' @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158",
        "get_attribute_ptrs reads header at cur and calls TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove copies header from potentially attacker-controlled buffer into local struct"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies a crafted serialized attributes buffer (head) via REE such that head->attrs_size is inconsistent with contained entries",
        "TA accepts the template and calls into code path reaching get_attribute_ptrs"
      ],
      "attack_scenario": "A malicious client supplies a truncated or specially crafted attributes blob where cur + sizeof(pkcs11_ref) exceeds end, causing TEE_MemMove to read beyond allocated buffer and potentially crash or leak memory.",
      "impact": "Out-of-bounds read leading to denial-of-service (TEE_Panic or crash) and possible information disclosure or control-flow compromise depending on environment."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate that (cur + sizeof(pkcs11_ref)) <= end before calling TEE_MemMove, and ensure next_off computation is checked against remaining bytes."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Sanity-check pkcs11_ref.size values (e.g., max allowed) and ensure loop advance cannot overflow or exceed end."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove from cur computed from head without pre-check of cur+sizeof(header) <= end",
        "Upstream provenance shows head originates from REE-provided params"
      ],
      "negative_indicators": [
        "Loop condition cur < end provides some protection but does not prevent copying sizeof(header) when cur is near end",
        "There is a later cur > end panic check but it occurs after the copy"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue (out-of-bounds read) is evident: copy length is fixed (sizeof header) while the check uses cur<end but does not ensure the full header fits, so attacker-controlled head can trigger unsafe read.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies struct header from cur without verifying header fits within head->attrs_size; cur derived from untrusted head."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "loop uses cur < end where end = start + head->attrs_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not fully safe",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    },
    {
      "arg": "cur",
      "why_safe": "checked via loop condition but not sufficient to ensure sizeof(header) fits",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "Line 1237 (TEE_MemMove out->memref.buffer) remains an information-flow to REE of TA-controlled obj_handle (public) but was not promoted to unencrypted_output because sensitivity is public.",
    "Later TEE_MemMove calls copy other parsed data into TA buffers using sizes from untrusted headers (potentially exploitable) — see earlier structural_risks."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of unvalidated fixed-size copy from untrusted buffer",
      "Upstream taint from REE params confirmed"
    ],
    "negative_indicators": [
      "Some loop boundary checks exist (cur < end) which mitigate some cases but are insufficient here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The primary issue is a memory-safety weakness: a fixed-size header is copied from a cursor derived from an untrusted length-limited buffer without ensuring the full header fits; this is reliably exploitable for OOB reads/crash.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size?*attr_size:unknown"
        ]
      },
      "why": "Copies attribute payload into caller buffer using size from metadata without validating attr_ptr provenance and remaining buffer.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out buffer (REE-visible); obj_handle is non-sensitive but is a structural REE-visible write.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #37: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 192.06秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE‑125

深刻度: HIGH

テイントフロー:

ソース: caller-supplied serialized attributes buffer (params.memref -> head)

シンク: TEE_MemMove reading header into local pkcs11_ref

判定理由: Memory-safety precedence: the memmove reads a fixed header size from a pointer derived from untrusted serialized data without verifying sufficient remaining length; this is a clear out-of-bounds/read risk and thus classified as vulnerable under weak_input_validation.

信頼度: MEDIUM

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2327, 2414, 2423, 2424]:
-- Call #1 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #2 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #3 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #4 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output buffer filled by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "return value",
        "rhs": "bbool (or false if PKCS11_RV_NOT_FOUND)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "checks for PKCS11_RV_NOT_FOUND and assert(rc == PKCS11_CKR_OK)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2327,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool; obj is TA-managed (origin from handle resolution) but origin provenance upstream is unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite)",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head (attributes list) passed into get_bool; head was derived from template which originally came from caller-supplied memref (REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite)",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of obj->attributes passed into get_bool at parent_priv check; obj is TA-managed but derived from earlier handle lookup",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_attrs_against_modification (callsite)",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "alias of head passed into get_bool to obtain obj_priv; head originated from template derived from REE-provided data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "calls get_attribute with a fixed-size buffer for a boolean; relies on get_attribute to validate size and return proper rc, then asserts rc==OK which may be insufficient against malformed head data",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(...) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (and early return)",
        "rhs": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
      },
      {
        "lhs": "attr (destination bytes)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      },
      {
        "lhs": "*attr_size (after)",
        "rhs": "size (written back)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "alias of caller-provided head passed into get_attribute; head may be REE-origin (shared) or TA-managed depending on callsite",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes address of local bbool as attr; binding of callee attr parameter to TA-private stack buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes address of size as attr_size; callee may update *attr_size with required size (binding of attr_size to caller stack)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=NA,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr relying on prior attr_size check; if attr_size is NULL or attr not large enough this can cause overflow",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size_or_unknown"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159"
      },
      {
        "lhs": "rc",
        "rhs": "implicit from get_attribute_ptrs via count checks (if !count return NOT_FOUND, if count!=1 return GENERAL_ERROR)",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks count and returns appropriate error codes when 0 or !=1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller 'head' passed into get_attribute_ptr; provenance of head at this callsite may be unknown/REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of callee attr_ptr to caller-provided pointer (&attr_ptr) at callsite; destination pointer region depends on caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=NA,dst_sz=pointer"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of callee attr_size to caller-provided &size; callee may update *attr_size (written back to caller)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=NA,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller 'candidate' passed as head here; candidate provenance at this callsite is unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=candidate->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of callee attr_ptr to caller &value at this site; value will point into attribute storage if found",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=NA,dst_sz=pointer"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of attr_size to caller &size; callee writes required size back which caller uses for comparisons",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=NA,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of callee head to *head at this callsite; *head provenance depends on caller state",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=(*head)->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of attr_ptr to caller &value at this callsite; value will point into attribute storage if found",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=NA,dst_sz=pointer"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding of attr_size to caller &size at this callsite; callee may update size used subsequently by caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=NA,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "get_attribute_ptr delegates to get_attribute_ptrs and trusts that it populates attr_ptr, attr_size, and count correctly; insufficient local validation of returned pointers/sizes may lead to misuse",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "next_off",
      "found",
      "attr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads bytes from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (size derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "cur + sizeof(pkcs11_ref) and pkcs11_ref.size when matching attribute (written from loop)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (updated at end of function)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses cur < end as loop bound and breaks when found==max_found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads attribute header via TEE_MemMove from cur (derived from head) and uses pkcs11_ref.size to compute next_off without ensuring sizeof(pkcs11_ref)+pkcs11_ref.size is within end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "function panics if cur > end, indicating a structural risk when parsing untrusted serialized attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller 'head' passed into get_attribute_ptrs; origin may be REE-visible or TA-private depending on callsite",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of callee attr (attr_ptr) to caller-provided pointer; attr pointers returned point into parsed buffer (cur + sizeof(header))",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=NA,dst_sz=pointer"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of callee attr_size to caller-provided pointer; callee writes individual pkcs11_ref.size values back to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=NA,dst_sz=4"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of callee count to caller-provided &count; callee updates count with number of matches found",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=NA,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "data copied from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "rc (implicit)",
        "rhs": "memmove operation effect: dest <- src (len bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(pkcs11_ref) from cur (derived from head which may be REE-controlled) into local pkcs11_ref; size and subsequent next_off use fields from untrusted data without robust validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (found by parsing possibly REE-origin data) into caller buffer attr; relies on prior attr_size checks but attr may be NULL or attr_size absent leading to misuse",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size_or_unknown"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header and then up to MIN(pkcs11_ref.size, sizeof(data)) bytes from parsed buffer; pkcs11_ref.size originates from untrusted serialized data and influences copy length",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies caller-supplied prefix into 'pre' without verifying pre is non-NULL or large enough here (caller responsibility), creating a potential overwrite or crash",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (prefix) TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur (derived from head which may be REE-controlled) without ensuring sizeof(pkcs11_ref) bytes remain before end; pkcs11_ref.size (from that copy) then influences subsequent parsing.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-supplied serialized attributes buffer (params.memref -> head)",
      "propagation_path": [
        "params.memref.buffer -> template/head (entry_set_attribute_value): /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004",
        "head -> get_attribute_ptrs cur/end computation: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108",
        "cur -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)): /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove reading header into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies a truncated or specially-crafted serialized attributes buffer in the REE-provided memref such that cur is near end and fewer than sizeof(pkcs11_ref) bytes remain",
        "No additional bounds validation performed before the memcpy"
      ],
      "attack_scenario": "A malicious client provides a malformed attributes blob that causes TEE_MemMove to read past the valid buffer, leading to out-of-bounds read and use of attacker-controlled pkcs11_ref.size to influence subsequent parsing and copies.",
      "impact": "Out-of-bounds read and subsequent incorrect parsing could lead to crashes (TEE_Panic), logic bypass, or memory disclosure depending on platform; denial of service is likely, confidentiality/integrity impact possible depending on downstream usage."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Before TEE_MemMove(&pkcs11_ref,...), ensure (end - cur) >= sizeof(pkcs11_ref); validate pkcs11_ref.size such that sizeof(pkcs11_ref)+pkcs11_ref.size does not exceed remaining bytes."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:120-121",
        "recommendation": "Sanitize pkcs11_ref.size (reject sizes that are implausible or would overflow size_t), and handle malformed entries gracefully rather than continuing parsing or panicking."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove of sizeof(pkcs11_ref) from cur (line 119)",
        "cur and end computed from head->attrs_size which is REE-supplied upstream",
        "No explicit check that (end - cur) >= sizeof(pkcs11_ref) before the copy"
      ],
      "negative_indicators": [
        "Loop uses cur < end as a loop bound and there is a later check cur > end that panics (not a safe sanitizer)",
        "Some callers may supply well-formed serialized data in normal operation"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety precedence: the memmove reads a fixed header size from a pointer derived from untrusted serialized data without verifying sufficient remaining length; this is a clear out-of-bounds/read risk and thus classified as vulnerable under weak_input_validation.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(pkcs11_ref) from cur without ensuring that many bytes remain (cur derived from REE-provided head)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop uses cur < end as loop bound and breaks on found==max_found, but does not ensure sizeof(header) bytes are available before header copy"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not fully safe",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses treating the same copy as an information-disclosure (unencrypted_output) candidate; if downstream code later copies parsed plaintext into REE, that should be evaluated separately."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from untrusted buffer to local header",
      "Header size then used to drive further copies/parsing"
    ],
    "negative_indicators": [
      "Some loop-bound checks exist but are insufficient to guarantee header fits"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The TEE_MemMove at line 119 performs an unchecked fixed-size read from a buffer derived from REE data; absent a prior precise bounds check for sizeof(pkcs11_ref) this is a memory-safety vulnerability (CWE-125).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads header from serialized attributes and uses header.size to compute next offset without verifying header fits completely within remaining buffer.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "why": "Function calls TEE_Panic if parsing advances past end, indicating fragile handling of malformed input.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}
フロー #38: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 217.20秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-provided serialized attribute buffer (params/ctrl->memref.buffer ultimately from REE)

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from untrusted buffer

判定理由: Memory-safety risk (out-of-bounds read/parse) is present because the code copies a fixed-size header from untrusted memory without ensuring enough remaining bytes; this precedes use of attacker-controlled size fields, so the line is classified vulnerable under weak_input_validation.

信頼度: MEDIUM

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2327, 2414, 2423, 2424]:
-- Call #1 at line 2327 --
2325: * direction i.e from TRUE -> FALSE.
2326: */
2327: >>> return get_bool(obj->attributes, req_attr->id);
2328: default:
2329: break;
-- Call #2 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #3 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #4 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(bbool) initialised",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-237"
      },
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-239"
      },
      {
        "lhs": "return value",
        "rhs": "bbool when rc == PKCS11_CKR_OK, false when PKCS11_RV_NOT_FOUND",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244-244",
        "evidence": "assert(rc == PKCS11_CKR_OK) ensures expected success before returning bbool"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2327,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg 'head' at this call is obj->attributes (TA-private) passed from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "return get_bool(obj->attributes, req_attr->id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first arg 'head' here aliases head built from template that originated from REE-supplied ctrl buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=head->attrs_size,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: first call reads parent_priv from obj->attributes (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: second call reads obj_priv from head (attributes derived from REE template)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=head->attrs_size,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute to read a byte from head based on attribute id; underlying get_attribute may trust head contents size parameter without extra validation here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-176"
      },
      {
        "lhs": "*attr_size",
        "rhs": "size when *attr_size < size branch sets *attr_size = size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-183"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) when attr non-NULL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "checks *attr_size < size and returns BUFFER_TOO_SMALL after updating *attr_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided structure (origin unknown at this call-site)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' (destination) at this call is &bbool from caller (TA-local buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter points to caller's size variable (used for buffer sizing information)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from attr_ptr into attr without validating attr_ptr provenance or ensuring size is bounded by caller buffers beyond attr_size check",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(..., &count) result",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-161"
      },
      {
        "lhs": "return value",
        "rhs": "derived from count: 0 -> NOT_FOUND, !=1 -> GENERAL_ERROR, else OK",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided structure (origin unknown at this call-site)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter will receive pointer(s) into attribute storage (destined for internal use)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter points to caller's size variable used to communicate attribute length",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'candidate' passed as head may originate from object candidate being inspected (origin unclear)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'value' out-parameter will point to attribute data within candidate; provenance depends on candidate",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'size' out-parameter receives attribute length used by caller for equality checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: head pointer dereferenced (*head) may reference mutable attribute list built earlier (origin depends on caller)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'value' will point into attribute storage returned to caller for further processing",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'size' out-parameter provides attribute length used by caller when adding or copying attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from cur",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120-120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into attribute payload)",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-133"
      },
      {
        "lhs": "*attr_size_ptr (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-115",
        "evidence": "loop condition uses cur < end where end computed from head->attrs_size"
      },
      {
        "kind": "sanity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "panic if cur > end (Exceeding serial object length)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided attrs structure (provenance unknown at this call-site)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter corresponds to caller's attr_ptr (will receive pointers into attribute payloads)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter maps to caller's attr_size for communicating lengths",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' parameter controls maximum results and is updated with found count (caller-provided &count)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur (derived from head) and uses pkcs11_ref.size to compute next offset and pointers without validating size vs remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Stores pointers (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; if head is REE-originated these pointers reference shared memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur (derived from head built from caller data) into local pkcs11_ref using size sizeof(pkcs11_ref) without validating that remaining bytes >= sizeof(pkcs11_ref)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr into caller-supplied attr buffer; provenance of attr_ptr depends on head/candidate (could be shared), size comes from attribute metadata",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur (parsed from head) into local structure using sizeof without explicit remaining-bytes check beyond loop bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr (reference data) into local pkcs11_ref without validating ref_attr length here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr into local pkcs11_ref before using id/size to fetch attribute pointers; ref_attr provenance may be untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into prefix2 using prefix_len+1 as length; origin/provenance of prefix is unclear and prefix2 size assumptions not shown here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from cur into local variable; cur is iterating over head built from caller data and size validation relies on loop bounds and pkcs11_ref.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies a small amount (MIN(pkcs11_ref.size, sizeof(data))) from attribute payload into local data[]; MIN bounds used but provenance of pkcs11_ref.size is from parsed data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies head from ref into local head via sizeof(head); ref provenance may be external and no explicit length check is visible here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre using strlen(prefix) bytes; pre destination must be valid and prefix provenance unclear here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur (derived from head which is REE-supplied) without verifying that remaining bytes >= sizeof(pkcs11_ref); pkcs11_ref.size then used to compute next offset, enabling out-of-bounds reads or corrupted parsing.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided serialized attribute buffer (params/ctrl->memref.buffer ultimately from REE)",
      "propagation_path": [
        "TA_InvokeCommandEntryPoint -> entry_copy_object: ctrl = params (entry.c:308-310)",
        "entry_copy_object -> serialargs_alloc_get_attributes -> head (object.c:1108-1118,1163-1166)",
        "check_attrs_against_modification parses head into cli_ref via TEE_MemMove (pkcs11_attributes.c:2380)",
        "get_attribute_ptrs iterates cur over head and calls TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (pkcs11_attributes.c:107-119) [sink]"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from untrusted buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A malformed or truncated serialized attribute list is supplied from REE (ctrl buffer).",
        "head->attrs_size is inconsistent with actual buffer length, or pkcs11_ref.size is crafted to manipulate next_off."
      ],
      "attack_scenario": "Attacker supplies a crafted serialized attributes blob where remaining bytes < sizeof(pkcs11_ref) at cur; TEE_MemMove will read past the valid buffer, causing out-of-bounds read or mis-parsing of attribute headers; this may lead to panic or logic corruption enabling further attacks.",
      "impact": "Information disclosure from adjacent memory, denial-of-service (TEE_Panic), or corrupted attribute handling leading to privilege/control-flow issues."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that (end - cur) >= sizeof(pkcs11_attribute_head) before calling TEE_MemMove; validate pkcs11_ref.size against remaining bytes before using it to compute next_off or pointers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source buffer is REE-provided (untrusted) and parsed here.",
        "TEE_MemMove copies a fixed-size header using sizeof() with no immediate remaining-bytes check.",
        "pkcs11_ref.size is then used to compute offsets, enabling attacker-controlled arithmetic."
      ],
      "negative_indicators": [
        "Loop uses cur < end where end is computed from head->attrs_size which provides some bounding, but does not guarantee sizeof(pkcs11_ref) <= end - cur.",
        "There is a later check that panics if cur > end, but that occurs after parsing and may cause DoS rather than safe handling."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety risk (out-of-bounds read/parse) is present because the code copies a fixed-size header from untrusted memory without ensuring enough remaining bytes; this precedes use of attacker-controlled size fields, so the line is classified vulnerable under weak_input_validation.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Header copied from untrusted 'cur' without ensuring remaining buffer length >= sizeof(pkcs11_ref)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-115",
      "evidence": "loop condition uses cur < end where end = (char*)head + sizeof(struct obj_attrs) + head->attrs_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe; originates from REE-supplied serialized template and size fields are attacker-influencable",
      "evidence": "entry_copy_object -> serialargs_alloc_get_attributes -> head (object.c:1118-1120,1163-1166)"
    }
  ],
  "residual_risks": [
    "Potential information-disclosure or REE-visible output paths exist elsewhere (e.g., copying obj_handle into out->memref.buffer) but were not promoted here because memory-safety dominates; review those lines for unencrypted_output."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from untrusted buffer with sizeof(header) used as length.",
      "Subsequent use of parsed size field to compute offsets."
    ],
    "negative_indicators": [
      "Loop bound provides partial protection but is insufficient to guarantee safety in all cases."
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The sink line performs a fixed-size copy from an untrusted, parsed buffer without explicit per-copy remaining-bytes validation; this yields a credible out-of-bounds/read-parsing vulnerability (weak input validation).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); confirmed size check earlier ensures out->memref.size == sizeof(obj_handle) but REE-visible destination remains.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #39: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 150.94秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-provided attributes buffer (params memref -> template -> head) originating from REE

シンク: TEE_MemMove reading sizeof(pkcs11_ref) from cur

判定理由: Memory-safety risk (out-of-bounds read) is evident where a fixed-size copy is performed without ensuring sufficient remaining bytes; per priority rules memory-safety takes precedence, so classify as weak_input_validation leading to CWE-125.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2414, 2423, 2424]:
-- Call #1 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #2 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #3 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "bbool",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output buffer populated by get_attribute(head, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      },
      {
        "lhs": "size",
        "rhs": "initialized to sizeof(bbool) then possibly modified by get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-239"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-245",
        "evidence": "returns false if PKCS11_RV_NOT_FOUND and assert(rc == PKCS11_CKR_OK) otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "head passed to get_bool in caller originates from attributes list derived earlier (likely REE-supplied template) and is aliased into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (cli_ref.id == PKCS11_CKA_TOKEN && get_bool(head, PKCS11_CKA_TOKEN)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "obj->attributes (TA-managed object attributes) passed into get_bool; origin is TA-private object data bound from handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool parent_priv = get_bool(obj->attributes, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "head (attributes list) passed again to get_bool for cli_ref.id; head may originate from REE-provided template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "bool obj_priv = get_bool(head, cli_ref.id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "delegates to get_attribute with a size pointer that may be modified by callee; lack of visible strong validation of returned size/contents",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size (when attr_size provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:181-184,189-190"
      },
      {
        "lhs": "attr (buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) (data copied from attr_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller-provided head pointer (attributes list) flows into get_attribute; head earlier derived from template potentially sourced from REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "attr argument (&bbool) is a local TA buffer passed into get_attribute (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<-TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "attr_size pointer (local size variable) passed in and may be updated by callee; binding to caller-local storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA<-TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=sizeof(size),dst_sz=sizeof(size)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "copies size bytes from attr_ptr (derived from head, possibly REE-supplied) into attr without additional validation of attr_ptr provenance; relies on earlier size check which may be manipulated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size (caller-provided)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "count",
        "rhs": "initialized to 1 then updated by get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "rc",
        "rhs": "implicit return codes based on count checks (0->OK, no count->NOT_FOUND, >1->GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "returns PKCS11_RV_NOT_FOUND if count==0 and PKCS11_CKR_GENERAL_ERROR if count!=1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided head pointer flows into helper and is used to compute attr_ptr; head earlier may be derived from REE-supplied data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr out-parameter is bound to data inside head by helper; attr_ptr originates from head contents (may be REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size out-parameter is bound to size of attribute; caller-provided pointer updated with size derived from head contents",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "delegates to get_attribute_ptrs which writes attr_ptr/attr_size/count based on head contents; function relies on count checks after the call but does not validate attr_ptr/attr_size ranges here",
      "sink_function": "get_attribute_ptrs",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=attr_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "attr",
      "attr_size",
      "count",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads from cur/head contents)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (size derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "assigned from cur+sizeof(pkcs11_ref) and pkcs11_ref.size when matching attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (updated based on matches)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses cur<end as bound and increments cur by next_off"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-provided head is consumed and its internal pointers (cur/end) drive control and outputs; head may originate from REE-supplied template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr out-parameter is bound to addresses inside head (cur+sizeof(pkcs11_ref)) and thus aliases REE-origin data into caller-visible pointers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size out-parameter is written with pkcs11_ref.size derived from head contents; size provenance is from REE-origin data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads attribute header from cur and uses pkcs11_ref.size to compute next_off and outputs without explicit validation that cur+next_off stays within end (panic if exceeded later)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "if parsing overruns (cur > end) code calls TEE_Panic, indicating lack of graceful handling for malformed REE-provided data",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copy of n bytes)",
        "site": "multiple call sites (see callers in attributes.c)"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "callers are expected to validate sizes before calling",
        "evidence": "callers perform some checks (e.g., attr_size comparisons) but many call-sites copy based on sizes derived from parsed REE-origin data"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies sizeof(pkcs11_ref) from cur (derived from head which may be REE-supplied) into local structure without validating that cur+sizeof(pkcs11_ref) <= end beyond loop bound check",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies size bytes from attr_ptr (derived from parsed head content) into caller buffer attr; relies on earlier size checks which may be manipulated and attr_ptr provenance is from head",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix (caller-provided) into pre buffer; binding of pre/prefix origins may be REE or TA depending on caller, risk is aliasing of shared buffers",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur which is derived from head+offset; loop only checks cur < end, not that end - cur >= sizeof(pkcs11_ref), allowing an out-of-bounds read when head.attrs_size is maliciously small or truncated.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided attributes buffer (params memref -> template -> head) originating from REE",
      "propagation_path": [
        "params[0].memref.buffer -> template (entry_set_attribute_value):/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004",
        "template -> head (create_attributes_from_template / modify_attributes_list) : object.c:1047-1052",
        "head -> get_attribute_ptrs cur/end setup : attributes.c:107-108",
        "cur -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) : attributes.c:119"
      ],
      "sink": "TEE_MemMove reading sizeof(pkcs11_ref) from cur"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE supplies a malformed/truncated attributes buffer in params memref",
        "TA accepts and parses the buffer into head without sufficient size validation"
      ],
      "attack_scenario": "A malicious client supplies a truncated serialized attributes list such that end - cur < sizeof(pkcs11_ref); when the TA executes TEE_MemMove at line 119 it will read beyond the buffer, causing a crash or leakage of adjacent TA memory.",
      "impact": "Out-of-bounds read may lead to denial-of-service (TEE_Panic or crash) and potential disclosure of TA memory contents to attacker-controlled outputs downstream."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that (end - cur) >= sizeof(pkcs11_ref) before calling TEE_MemMove; validate pkcs11_ref.size and next_off against remaining bytes."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120-121",
        "recommendation": "Ensure pkcs11_ref.size is sane (e.g., upper-bounded) before using it to compute next_off and before writing outputs."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145",
        "recommendation": "Replace TEE_Panic with graceful error handling and fail-safe returns for malformed REE input."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove of fixed sizeof(pkcs11_ref) from cur",
        "Loop condition uses cur < end but not explicit remaining-bytes check",
        "Parsing uses attacker-controlled head->attrs_size to compute end"
      ],
      "negative_indicators": [
        "There is a later check that panics if cur > end (but panic is not preventive before the read)",
        "Some callers perform earlier size checks, but not sufficient at this site"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety risk (out-of-bounds read) is evident where a fixed-size copy is performed without ensuring sufficient remaining bytes; per priority rules memory-safety takes precedence, so classify as weak_input_validation leading to CWE-125.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Fixed-size read of pkcs11_ref from cur without verifying remaining bytes (end - cur) >= sizeof(pkcs11_ref)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-116",
      "evidence": "loop condition for (; cur < end; cur += next_off) uses cur<end"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Not fully safe; head is consumed and its attrs_size drives parsing but may be attacker-controlled",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    },
    {
      "arg": "attr_ptr/attr_size",
      "why_safe": "Writers are guarded by found/max_found logic but rely on pkcs11_ref.size validity",
      "evidence": "attributes.c:125-139"
    }
  ],
  "residual_risks": [
    "line 119 memory-safety finding suppresses but does not rule out information disclosure downstream if TA later copies parsed attribute data into REE-visible buffers"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy from parse pointer",
      "Lack of explicit remaining-bytes check"
    ],
    "negative_indicators": [
      "Loop bound exists (cur<end) and a panic is triggered if parsing overruns, but panic occurs after reads"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The TEE_MemMove at line 119 performs a fixed-size read from a pointer derived from REE-supplied data without verifying remaining buffer length; this is a clear out-of-bounds/read-overrun risk and thus classified as vulnerable under weak_input_validation (CWE-125).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads attribute header from cur and uses pkcs11_ref.size to advance; no explicit check that sizeof(pkcs11_ref) bytes remain before read.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute payload of size 'size' derived from head into caller buffer; relies on prior size checks.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "Allocates/derives template from caller memref buffer; upstream input influences parsing later.",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}
フロー #40: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationget_boolget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 138.48秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE‑126

深刻度: HIGH

テイントフロー:

ソース: caller-provided serialized attributes (head) originating from REE

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at get_attribute_ptrs:119

判定理由: The memmove at line 119 reads a fixed header size from a cursor derived from an untrusted-length field; the loop predicate cur < end does not guarantee that sizeof(header) bytes are available, so a bounded-read/validation flaw exists (CWE-126) with high confidence.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: get_bool
プロンプト 中間 (get_bool)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_bool” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2414, 2423, 2424]:
-- Call #1 at line 2414 --
2412: */
2413: if (cli_ref.id == PKCS11_CKA_TOKEN &&
2414: >>> 		    get_bool(head, PKCS11_CKA_TOKEN)) {
2415:     			if (!pkcs11_session_is_read_write(session)) {
2416:     				DMSG("Can't copy to token in a RO session");
-- Call #2 at line 2423 --
2421:     		if (cli_ref.id == PKCS11_CKA_PRIVATE) {
2422:     			bool parent_priv =
2423: >>> 				get_bool(obj->attributes, cli_ref.id);
2424:     			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
-- Call #3 at line 2424 --
2422:     			bool parent_priv =
2423:     				get_bool(obj->attributes, cli_ref.id);
2424: >>> 			bool obj_priv = get_bool(head, cli_ref.id);
2425:     
2426:     			/*

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

233: bool get_bool(struct obj_attrs *head, uint32_t attribute)
234: {
235: enum pkcs11_rc rc = PKCS11_CKR_OK;
236: uint8_t bbool = 0;
237: uint32_t size = sizeof(bbool);
238:
239: rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)
242: return false;
243:
244: assert(rc == PKCS11_CKR_OK);
245: return bbool;
246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_bool",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_bool)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_bool",
    "tainted_vars": [
      "head",
      "attribute",
      "rc",
      "bbool",
      "size"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute(head, attribute, &bbool, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      },
      {
        "lhs": "bbool",
        "rhs": "output of get_attribute on head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239-245"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:241-242",
        "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2414,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases 'head' constructed from client-supplied template (originates from ctrl buffer), so callee sees data derived from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=ctrl->memref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "get_bool(head, PKCS11_CKA_TOKEN)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2423,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' argument in get_bool(obj->attributes, ...) is TA-private attributes pointer derived from object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(obj->attributes),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_bool(obj->attributes, cli_ref.id)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2424,
      "function": "get_bool",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases template-derived head (from REE) when checking PKCS11_CKA_PRIVATE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=ctrl->memref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "get_bool(head, cli_ref.id)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute return codes and asserts rc == OK after treating NOT_FOUND; malformed or unexpected rc can trigger assert and crash.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_bool at lines [239]:
-- Call #1 at line 239 --
237: uint32_t size = sizeof(bbool);
238:
239: >>> rc = get_attribute(head, attribute, &bbool, &size);
240:
241: if (rc == PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size when attr_size provided or adjusted for too-small buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (destination)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copying from attr_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return BUFFER_TOO_SMALL; } prevents memmove when provided buffer smaller than attribute"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Reads attr_ptr/size via get_attribute_ptr (which may expose data derived from head); memmove uses size without additional validation of attr_ptr provenance and assumes attr_size logic suffices.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(*attr_size)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided head (may originate from REE-derived template); callee reads attributes through it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter aliases caller buffer (&bbool) on stack; destination region is TA-private stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases local size variable (&size) used to indicate buffer capacity and receive actual attribute size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-158"
      },
      {
        "lhs": "rc",
        "rhs": "returned based on count (0 -> NOT_FOUND, !=1 -> GENERAL_ERROR, else OK)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count and maps to PKCS11_RV_NOT_FOUND / GENERAL_ERROR / OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Delegates to get_attribute_ptrs which reads from head-derived data; count returned from helper is trusted only via simple checks, risking malformed entries bypassing validation.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided head (may be REE-derived template), so data origin is untrusted.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter will point into attribute storage (origin depends on head) and may expose pointers derived from untrusted data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter is used to return attribute size and may reflect untrusted lengths from head-derived data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "found",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading bytes from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "set to cur + sizeof(pkcs11_ref) or pkcs11_ref.size when matching id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses cur < end where end computed from head->attrs_size"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "detects cur > end and calls TEE_Panic(0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Parses length (pkcs11_ref.size) from data in head and uses it to compute next_off and result pointers without validating pkcs11_ref.size against remaining buffer, enabling out-of-bounds reads.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Writes pointers into attr/attr_size arrays based on cur + sizeof(pkcs11_ref) where cur is derived from head (caller-controlled); resulting pointers may point into untrusted regions.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_writes,src_sz=head->attrs_size,dst_sz=*count"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref); *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided head which may originate from REE, so parsing operates on untrusted data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter points into caller-supplied array; function writes pointers/count based on untrusted data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *)*count,src_sz=head->attrs_size,dst_sz=*count"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If parsing overruns, function calls TEE_Panic(0) which is a denial-of-service risk when fed malformed lengths from head.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "destination pointer passed to TEE_MemMove(call-site)",
        "site": "multiple call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      },
      {
        "lhs": "src",
        "rhs": "source pointer passed to TEE_MemMove(call-site)",
        "site": "multiple call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      },
      {
        "lhs": "n",
        "rhs": "size argument passed to TEE_MemMove(call-site)",
        "site": "multiple call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers sometimes check buffer size (attr_size) and return BUFFER_TOO_SMALL to avoid memmove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur (derived from head, potentially REE-controlled) into local pkcs11_ref; length fields read later (pkcs11_ref.size) are then trusted to compute offsets.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute bytes from attr_ptr (may point into untrusted-derived region) into attr buffer without extra validation beyond size checks performed by callers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&pkcs11_ref' is TA-private stack storage (receives data from src).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'cur' derives from head which may be REE-supplied, so memmove reads untrusted memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "When parsing overruns are detected callers invoke TEE_Panic after detecting cur > end which is a denial-of-service path if memmove reads malformed lengths.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from 'cur' derived from head (possibly REE-controlled); loop condition uses cur < end but does not ensure sizeof(pkcs11_ref) bytes are available, enabling out-of-bounds read and downstream trust of pkcs11_ref.size.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑126",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided serialized attributes (head) originating from REE",
      "propagation_path": [
        "params (TA_InvokeCommandEntryPoint) -> ctrl.memref.buffer (entry_copy_object): /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:308-310",
        "ctrlargs -> template/head constructed from template: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1118,1163-1166",
        "head passed into check_attrs_against_modification -> get_bool -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1171 -> /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239 -> 176 -> 158",
        "In get_attribute_ptrs: cur <- (char*)head+sizeof(obj_attrs); TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at line 119 (sink)"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at get_attribute_ptrs:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies a crafted serialized attributes blob in ctrl.memref.buffer/head with a truncated tail such that end - cur < sizeof(pkcs11_ref) or malformed pkcs11_ref.size",
        "TA accepts and passes head into get_attribute_ptrs (no prior full validation)"
      ],
      "attack_scenario": "Attacker-controlled serialized object causes TEE_MemMove to read beyond the declared attribute buffer, potentially leaking adjacent TA memory or causing corrupted length used downstream (next_off) leading to further OOB accesses or TEE_Panic (DoS).",
      "impact": "Memory disclosure or corruption within TA memory and possible denial-of-service via TEE_Panic; could enable further out-of-bounds reads/writes depending on downstream use of pkcs11_ref.size."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that (end - cur) >= sizeof(pkcs11_attribute_head) before reading the header and ensure pkcs11_ref.size is validated against remaining bytes before computing next_off or writing pointers."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120-138",
        "recommendation": "Check pkcs11_ref.size for sane upper bounds and ensure cur + sizeof(pkcs11_ref) + pkcs11_ref.size <= end before using it."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Avoid calling TEE_Panic on malformed input; return an error to callers instead to prevent DoS."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct memmove from cur without checking (cur < end) ensures only a start check, not full-size check",
        "pkcs11_ref.size is used subsequently to compute offsets with no validation",
        "Multiple call-sites show head originates from REE-derived buffers"
      ],
      "negative_indicators": [
        "There is a later check 'if (cur > end)' that detects some overruns but occurs after the memmove and thus does not prevent initial over-read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove at line 119 reads a fixed header size from a cursor derived from an untrusted-length field; the loop predicate cur < end does not guarantee that sizeof(header) bytes are available, so a bounded-read/validation flaw exists (CWE-126) with high confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from cur without ensuring sizeof(pkcs11_ref) bytes remain, trusting parsed size later."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115",
      "evidence": "loop uses cur < end where end = cur + head->attrs_size (insufficient because it doesn't ensure sizeof(header) bytes remain)"
    },
    {
      "type": "type_validation",
      "location": "get_attribute_ptr:160-166",
      "evidence": "get_attribute_ptr checks count and returns errors, but this occurs after get_attribute_ptrs and does not prevent the initial over-read"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108 (head->attrs_size used to compute end; data originates from REE)"
    }
  ],
  "residual_risks": [
    "119: downstream information-disclosure or corruption impact remains possible because parsed pkcs11_ref.size is trusted after the over-read"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unguarded memmove from untrusted-derived pointer",
      "Subsequent use of parsed size without validation"
    ],
    "negative_indicators": [
      "Some size checks exist elsewhere but occur after the memmove"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the call at line 119 performs an unchecked fixed-size read from a cursor derived from untrusted input; existing loop predicate is insufficient to guarantee availability of the header, making this a clear weak-input-validation vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Parsed pkcs11_ref.size from untrusted data is used to compute next_off and later pointer writes without validation, enabling further OOB when malformed.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=head->attrs_size,dst_sz=0"
        ]
      },
      "why": "On parse overrun the code calls TEE_Panic(0), which is a denial-of-service risk when fed malformed lengths from head.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}
フロー #41: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_processing -> check_attr_bval -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_processingcheck_attr_bvalget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 184.14秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: REE-provided serialized attributes buffer (params->memref.buffer parsed into head)

シンク: TEE_MemMove reading header from untrusted buffer @ attributes.c:119

判定理由: Memory-safety precedence: the code performs a fixed-size read from an untrusted buffer without verifying there is enough remaining bytes for that read; this creates an unequivocal out-of-bounds/robustness risk and is classified as weak input validation.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: check_created_attrs_against_processing
プロンプト 中間 (check_created_attrs_against_processing)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_created_attrs_against_processing” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [277, 485, 489, 955]:
-- Call #1 at line 277 --
275: goto out;
276:
277: >>> rc = check_created_attrs_against_processing(proc_params->id, head);
278: if (rc)
279: goto out;
-- Call #2 at line 485 --
483: goto out;
484:
485: >>> rc = check_created_attrs_against_processing(proc_params->id, pub_head);
486: if (rc)
487: goto out;
-- Call #3 at line 489 --
487: goto out;
488:
489: >>> rc = check_created_attrs_against_processing(proc_params->id,
490: priv_head);
491: if (rc)
-- Call #4 at line 955 --
953:
954:
955: >>> rc = check_created_attrs_against_processing(proc_params->id, head);
956: if (rc)
957: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1638: enum pkcs11_rc check_created_attrs_against_processing(uint32_t proc_id,
1639: struct obj_attrs *head)
1640: { 1641: 1645: switch (proc_id) { 1646: case PKCS11_PROCESSING_IMPORT: 1647: case PKCS11_CKM_ECDH1_DERIVE: 1648: case PKCS11_CKM_AES_ECB: 1649: case PKCS11_CKM_AES_CBC: 1650: case PKCS11_CKM_AES_ECB_ENCRYPT_DATA: 1651: case PKCS11_CKM_AES_CBC_ENCRYPT_DATA: 1652: case PKCS11_CKM_RSA_AES_KEY_WRAP: 1653: assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false)); 1654: break; 1655: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN: 1656: case PKCS11_CKM_AES_KEY_GEN: 1657: case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN: 1658: case PKCS11_CKM_EC_KEY_PAIR_GEN: 1659: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN: 1660: assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true)); 1661: break; 1662: default: 1663: TEE_Panic(proc_id); 1664: break; 1665: } 1666: 1667: switch (proc_id) { 1668: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN: 1669: assert(get_key_type(head) == PKCS11_CKK_GENERIC_SECRET); 1670: break; 1671: case PKCS11_CKM_AES_KEY_GEN: 1672: assert(get_key_type(head) == PKCS11_CKK_AES); 1673: break; 1674: case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN: 1675: assert(get_key_type(head) == PKCS11_CKK_EC_EDWARDS); 1676: break; 1677: case PKCS11_CKM_EC_KEY_PAIR_GEN: 1678: assert(get_key_type(head) == PKCS11_CKK_EC); 1679: break; 1680: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN: 1681: assert(get_key_type(head) == PKCS11_CKK_RSA); 1682: break; 1683: case PKCS11_PROCESSING_IMPORT: 1684: case PKCS11_CKM_ECDH1_DERIVE: 1685: default: 1686: break; 1687: } 1688: 1689: return PKCS11_CKR_OK; 1690: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_created_attrs_against_processing", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_created_attrs_against_processing", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_created_attrs_against_processing)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_created_attrs_against_processing",
    "tainted_vars": [
      "proc_id",
      "head",
      "check_attr_bval() result",
      "get_key_type() result"
    ],
    "propagation": [
      {
        "lhs": "check_attr_bval(proc_id, head, ...)",
        "rhs": "head (caller-provided obj_attrs) and proc_id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1653-1661"
      },
      {
        "lhs": "get_key_type(head)",
        "rhs": "head (caller-provided obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1668-1672"
      }
    ],
    "sanitizers": [
      {
        "kind": "assertion_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1653-1661,1668-1672",
        "evidence": "assert(...) used to validate attributes/type; may be compiled out"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 277,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-provided 'head' (obj_attrs built from REE-supplied template) passed into this function; origin is REE-visible serialargs buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=template->attrs_size,dst_sz=sizeof(*head)+template->attrs_size"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 485,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-provided 'pub_head' (from parsed template) passed into function; underlying bytes originate from REE serialargs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 489,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-provided 'priv_head' passed into function; originates from REE-provided template data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 955,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-provided 'head' passed into function at another call-site; origin from REE-constructed attrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1653,
      "function": "check_created_attrs_against_processing",
      "rule": "weak_input_validation",
      "why": "Uses assert() to validate attributes and types; if asserts are disabled this can skip validation leading to unsafe processing of caller data",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true));"
    }
  ]
}

関数: check_attr_bval
プロンプト 中間 (check_attr_bval)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attr_bval” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_processing at lines [1653, 1660]:
-- Call #1 at line 1653 --
1651: case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
1652: case PKCS11_CKM_RSA_AES_KEY_WRAP:
1653: >>> assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false));
1654: break;
1655: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN:
-- Call #2 at line 1660 --
1658: case PKCS11_CKM_EC_KEY_PAIR_GEN:
1659: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN:
1660: >>> assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true));
1661: break;
1662: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1617: static bool check_attr_bval(uint32_t proc_id __maybe_unused,
1618: struct obj_attrs *head,
1619: uint32_t attribute, bool val)
1620: { 1621: uint8_t bbool = 0; 1622: uint32_t sz = sizeof(bbool); 1623: 1624: if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val) 1625: return true; 1626: 1627: DMSG_BAD_BBOOL(attribute, proc_id, head); 1628: return false; 1629: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attr_bval", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attr_bval", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attr_bval)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attr_bval",
    "tainted_vars": [
      "proc_id",
      "head",
      "attribute",
      "val",
      "bbool",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "bbool",
        "rhs": "initialized 0 then potentially written by get_attribute(head, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1621-1624"
      },
      {
        "lhs": "sz",
        "rhs": "sizeof(bbool) assigned locally and passed to get_attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1621-1624"
      },
      {
        "lhs": "return value",
        "rhs": "result of get_attribute(head, attribute, &bbool, &sz) and boolean compare (!!bbool == val)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1624-1625"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1621-1624",
        "evidence": "local sz initialized to sizeof(bbool) before calling get_attribute"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1653,
      "function": "check_attr_bval",
      "rule": "other",
      "why": "caller passes 'head' pointer (obj_attrs) originating from earlier parsing of REE-supplied data; binding of callee parameter to REE-origin must be recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1660,
      "function": "check_attr_bval",
      "rule": "other",
      "why": "caller passes 'head' pointer (obj_attrs) from caller context; record aliasing of shared/parsed attributes into this helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1624,
      "function": "check_attr_bval",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute to safely fetch a boolean from caller-controlled 'head' without explicit size/format validation here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val) return true;"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attr_bval at lines [1624, 2134, 2140, 2259, 2456]:
-- Call #1 at line 1624 --
1622: uint32_t sz = sizeof(bbool);
1623:
1624: >>> if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)
1625: return true;
1626:
-- Call #2 at line 2134 --
2132: case PKCS11_CKA_VALUE:
2133: boolsize = sizeof(boolval);
2134: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE,
2135: &boolval, &boolsize);
2136: if (rc || boolval == PKCS11_FALSE)
-- Call #3 at line 2140 --
2138:
2139: boolsize = sizeof(boolval);
2140: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE,
2141: &boolval, &boolsize);
2142: if (rc || boolval == PKCS11_TRUE)
-- Call #4 at line 2259 --
2257:
2258:
2259: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED,
2260: &boolval, &boolsize);
2261: if (rc || boolval == PKCS11_TRUE)
-- Call #5 at line 2456 --
2454:
2455:
2456: >>> rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);
2457: if (rc && rc != PKCS11_RV_NOT_FOUND)
2458: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "*attr_size (out)",
        "rhs": "size assigned from get_attribute_ptr and propagated to caller on success or buffer-too-small",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (written)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1624,
      "function": "get_attribute",
      "rule": "other",
      "why": "Caller passes local &bbool and &sz (caller-controlled sizes originate from REE-parsed data) into get_attribute; bind callee params to REE-origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2134,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of callee params from caller: &boolval and &boolsize passed; origin of obj->attributes traces to earlier REE-derived object data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=boolsize"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2140,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of callee params from caller: &boolval and &boolsize; underlying attributes may originate from REE buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=boolsize"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of callee params from caller: &boolval and &boolsize used to retrieve PKCS11_CKA_TRUSTED from obj->attributes (caller-influenced).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=boolsize"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding of callee params from caller: &key_length and &size passed; key length attribute originates from caller-constructed attrs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(key_length)"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr (sourced from head via get_attribute_ptr) into caller buffer 'attr'; attr_ptr may originate from REE-parsed data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptr to provide correct size; only checks caller's provided attr_size against size but does not validate attr_ptr provenance/format.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "count",
        "rhs": "initialized to 1 then possibly modified by get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      },
      {
        "lhs": "return value",
        "rhs": "derived from count checks (0 -> NOT_FOUND, !=1 -> GENERAL_ERROR, else OK)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-165",
        "evidence": "Checks count after get_attribute_ptrs: returns NOT_FOUND if 0, GENERAL_ERROR if count != 1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site bindings: caller passes head, &attr_ptr, &size from get_attribute expecting pointers; underlying head may originate from REE-parsed data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: candidate and output &value,&size come from caller; attr pointer returned may reference caller-influenced storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=pkcs11_ref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: caller passes *head and expects &value,&size; returned pointer may alias internal or caller buffers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptrs to supply a valid attr_ptr/size and performs only count checks; provenance/format of attr_ptr not validated here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found",
      "attr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char*)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "bytes at cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (derived from parsed header)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr entries",
        "rhs": "set to cur + sizeof(pkcs11_ref) and pkcs11_ref.size when ids match",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes found)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: caller's 'head' pointer (obj_attrs parsed from REE data) is used as the base for parsing; origin is REE-visible",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: caller-provided 'attr' pointer array is populated with pointers into the parsed buffer (cur+sizeof(header)); aliases REE memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr_entries*sizeof(void*),src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Parses pkcs11_attribute_head from untrusted 'cur' via TEE_MemMove and uses pkcs11_ref.size without validating it sufficiently before pointer arithmetic",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "If pkcs11_ref.size is crafted large, next_off may advance cur past end triggering TEE_Panic; this is a structural risk from untrusted length fields",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "write from src via TEE_MemMove(dest, src, n) at various call sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "dest (local structs/arrays)",
        "rhs": "populated by bytes copied from src (which may be in parsed REE buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,220,265,298,352,353,435"
      },
      {
        "lhs": "dest (caller buffers)",
        "rhs": "populated by bytes copied from src (caller-provided or parsed attr pointers)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187,344,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove calls rely on caller-provided sizes/preceding checks elsewhere; no per-call sanitizer here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from parsed buffer 'cur' (untrusted) into local struct and uses its size for arithmetic without strong validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr (which may point into REE-origin parsed buffer) into caller buffer 'attr'",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from 'cur' (untrusted) into local cli_head and then uses cli_head.size for length calculations without explicit validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (source from caller) into local header for reference checks; binds callee params to caller-origin",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local struct before using its id/size to lookup attributes; source may be attacker-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=pkcs11_ref.size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into caller-provided prefix2 buffer; dest provenance depends on caller and length calculation uses prefix_len",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref from cur via MemMove then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) without validating full bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies a small sample of attribute bytes from parsed buffer into local 'data' array; source may be untrusted and size is constrained by MIN(...) but provenance remains untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'head' from ref into local head; ref originates from caller-provided data and may be untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before printing; dest 'pre' may be uninitialized if allocation failed—possible sink of unverified memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from untrusted buffer 'cur' without ensuring cur+sizeof(pkcs11_ref) <= end; pkcs11_ref.size (from that copy) is later used for pointer arithmetic leading to potential out-of-bounds parsing.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "REE-provided serialized attributes buffer (params->memref.buffer parsed into head)",
      "propagation_path": [
        "params (caller) -> ctrl->memref.buffer used to build template/attrs @ processing.c:226-238",
        "template bytes -> head/@cur pointer parsed in get_attribute_ptrs @ attributes.c:107-120",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from untrusted cur @ attributes.c:119"
      ],
      "sink": "TEE_MemMove reading header from untrusted buffer @ attributes.c:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized attribute blob is supplied via REE memref.",
        "Serialized blob has length such that cur < end but cur+sizeof(pkcs11_ref) may exceed end (or header fields crafted)."
      ],
      "attack_scenario": "Crafted serialized attributes cause get_attribute_ptrs to read header beyond buffer or produce a large pkcs11_ref.size, enabling out-of-bounds reads/writes or TEE_Panic, potentially leading to denial-of-service or memory corruption.",
      "impact": "High: memory-safety violation (out-of-bounds read/write) can cause crash (TEE_Panic), information disclosure, or memory corruption depending on layout and follow-up uses."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_attribute_head) <= end before TEE_MemMove and validate pkcs11_ref.size against remaining bytes before using it in arithmetic."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size is within reasonable limits (e.g., not larger than end - (cur + sizeof(head))) before computing next_off or storing pointers."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Check header fields for plausibility (e.g., cumulative offsets) and fail safely instead of TEE_Panic on malformed input."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct memcpy-like call (TEE_MemMove) from untrusted buffer at the exact line",
        "Subsequent use of pkcs11_ref.size to compute next_off and pointer arithmetic without pre-checking remaining buffer"
      ],
      "negative_indicators": [
        "Loop condition cur < end exists (but does not guarantee room for sizeof header)",
        "TEE_Panic present on cur > end which is defensive but triggered only after advancing past end"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: the code performs a fixed-size read from an untrusted buffer without verifying there is enough remaining bytes for that read; this creates an unequivocal out-of-bounds/robustness risk and is classified as weak input validation.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads pkcs11_attribute_head from cur without ensuring the header fits within the remaining buffer; pkcs11_ref.size then used for arithmetic."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe",
      "evidence": "head->attrs_size used as end bound but per-iteration check only ensures cur < end, not room for header @ attributes.c:107-109,115-121"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses promotion to unencrypted_output; although data is untrusted, pkcs11_ref is not sensitive."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Exact sink from untrusted buffer at line 119",
      "Subsequent unsafe use of parsed size"
    ],
    "negative_indicators": [
      "Loop has cur < end which provides partial protection but insufficient for header read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Reported as vulnerability due to clear insufficient bounds validation before reading a fixed-size header from untrusted memory; fixes should add explicit checks preventing the read and validating parsed sizes.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref)+pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses pkcs11_ref.size (from untrusted header) to compute next_off and advance parsing pointer; a crafted size can cause out-of-bounds advancement or TEE_Panic.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size"
        ]
      },
      "why": "If next_off pushes cur past end the function calls TEE_Panic; parsing of untrusted lengths is a structural risk.",
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute bytes from attr_ptr (may point into REE-origin parsed buffer) into caller buffer 'attr'.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #42: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_processing -> check_attr_bval -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_processingcheck_attr_bvalget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 208.32秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Attributes blob originally derived from REE-supplied templates (params)

シンク: TEE_MemMove copies header from blob into local pkcs11_ref and its size field is used for subsequent pointer/offset arithmetic

判定理由: The copy reads a fixed header from an untrusted blob without ensuring the header fits entirely in the remaining buffer; the header's size field then influences buffer traversal, thus meeting memory-safety vulnerability criteria.

信頼度: MEDIUM

LLM対話履歴 (14 メッセージ)

関数: check_created_attrs_against_processing
プロンプト 中間 (check_created_attrs_against_processing)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_created_attrs_against_processing” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [485, 489, 955]:
-- Call #1 at line 485 --
483: goto out;
484:
485: >>> rc = check_created_attrs_against_processing(proc_params->id, pub_head);
486: if (rc)
487: goto out;
-- Call #2 at line 489 --
487: goto out;
488:
489: >>> rc = check_created_attrs_against_processing(proc_params->id,
490: priv_head);
491: if (rc)
-- Call #3 at line 955 --
953:
954:
955: >>> rc = check_created_attrs_against_processing(proc_params->id, head);
956: if (rc)
957: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1638: enum pkcs11_rc check_created_attrs_against_processing(uint32_t proc_id,
1639: struct obj_attrs *head)
1640: { 1641: 1645: switch (proc_id) { 1646: case PKCS11_PROCESSING_IMPORT: 1647: case PKCS11_CKM_ECDH1_DERIVE: 1648: case PKCS11_CKM_AES_ECB: 1649: case PKCS11_CKM_AES_CBC: 1650: case PKCS11_CKM_AES_ECB_ENCRYPT_DATA: 1651: case PKCS11_CKM_AES_CBC_ENCRYPT_DATA: 1652: case PKCS11_CKM_RSA_AES_KEY_WRAP: 1653: assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false)); 1654: break; 1655: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN: 1656: case PKCS11_CKM_AES_KEY_GEN: 1657: case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN: 1658: case PKCS11_CKM_EC_KEY_PAIR_GEN: 1659: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN: 1660: assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true)); 1661: break; 1662: default: 1663: TEE_Panic(proc_id); 1664: break; 1665: } 1666: 1667: switch (proc_id) { 1668: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN: 1669: assert(get_key_type(head) == PKCS11_CKK_GENERIC_SECRET); 1670: break; 1671: case PKCS11_CKM_AES_KEY_GEN: 1672: assert(get_key_type(head) == PKCS11_CKK_AES); 1673: break; 1674: case PKCS11_CKM_EC_EDWARDS_KEY_PAIR_GEN: 1675: assert(get_key_type(head) == PKCS11_CKK_EC_EDWARDS); 1676: break; 1677: case PKCS11_CKM_EC_KEY_PAIR_GEN: 1678: assert(get_key_type(head) == PKCS11_CKK_EC); 1679: break; 1680: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN: 1681: assert(get_key_type(head) == PKCS11_CKK_RSA); 1682: break; 1683: case PKCS11_PROCESSING_IMPORT: 1684: case PKCS11_CKM_ECDH1_DERIVE: 1685: default: 1686: break; 1687: } 1688: 1689: return PKCS11_CKR_OK; 1690: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_created_attrs_against_processing", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_created_attrs_against_processing", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_created_attrs_against_processing)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_created_attrs_against_processing",
    "tainted_vars": [
      "proc_id",
      "head",
      "head->attrs (derived from templates)",
      "attribute values read by check_attr_bval/get_key_type"
    ],
    "propagation": [
      {
        "lhs": "proc_id",
        "rhs": "proc_params->id (caller-provided processing id)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:485,489,955"
      },
      {
        "lhs": "head",
        "rhs": "pub_head / priv_head / head passed from caller (created from templates derived from REE-supplied buffers)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:450-468,464-472,553-556"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1645-1665",
        "evidence": "switch on proc_id enumerates allowed proc_id cases"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 485,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-created pub_head (TEE-private) passed into checker; origin template derived from REE-supplied params buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 489,
      "function": "check_created_attrs_against_processing",
      "rule": "other",
      "why": "alias of caller-created priv_head (TEE-private) passed into checker; origin template derived from REE-supplied params buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1653,
      "function": "check_created_attrs_against_processing",
      "rule": "weak_input_validation",
      "why": "Uses assert(check_attr_bval(...)) on attributes that ultimately derive from untrusted input (templates), causing possible logic failure or panic if attributes malformed",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1669,
      "function": "check_created_attrs_against_processing",
      "rule": "weak_input_validation",
      "why": "Asserts that key type matches expected value using get_key_type(head) where head is derived from untrusted templates; malformed attrs could lead to incorrect behavior",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "assert(get_key_type(head) == PKCS11_CKK_EC);"
    }
  ]
}

関数: check_attr_bval
プロンプト 中間 (check_attr_bval)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_attr_bval” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_created_attrs_against_processing at lines [1653, 1660]:
-- Call #1 at line 1653 --
1651: case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
1652: case PKCS11_CKM_RSA_AES_KEY_WRAP:
1653: >>> assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false));
1654: break;
1655: case PKCS11_CKM_GENERIC_SECRET_KEY_GEN:
-- Call #2 at line 1660 --
1658: case PKCS11_CKM_EC_KEY_PAIR_GEN:
1659: case PKCS11_CKM_RSA_PKCS_KEY_PAIR_GEN:
1660: >>> assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, true));
1661: break;
1662: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1617: static bool check_attr_bval(uint32_t proc_id __maybe_unused,
1618: struct obj_attrs *head,
1619: uint32_t attribute, bool val)
1620: { 1621: uint8_t bbool = 0; 1622: uint32_t sz = sizeof(bbool); 1623: 1624: if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val) 1625: return true; 1626: 1627: DMSG_BAD_BBOOL(attribute, proc_id, head); 1628: return false; 1629: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_attr_bval", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_attr_bval", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_attr_bval)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_attr_bval",
    "tainted_vars": [
      "proc_id",
      "head",
      "bbool",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "bbool",
        "rhs": "get_attribute(head, attribute, &bbool, &sz) result",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1624"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 485,
      "function": "check_attr_bval",
      "rule": "other",
      "why": "alias of pub_head (caller-created attributes structure derived from REE templates) passed into checker",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, pub_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 489,
      "function": "check_attr_bval",
      "rule": "other",
      "why": "alias of priv_head (caller-created attributes structure derived from REE templates) passed into checker",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_created_attrs_against_processing(proc_params->id, priv_head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1624,
      "function": "check_attr_bval",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute and boolean comparison on data ultimately derived from untrusted templates; missing or malformed attribute triggers DMSG and false return without strong recovery",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=sz,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attr_bval at lines [1624, 2134, 2140, 2259, 2456]:
-- Call #1 at line 1624 --
1622: uint32_t sz = sizeof(bbool);
1623:
1624: >>> if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)
1625: return true;
1626:
-- Call #2 at line 2134 --
2132: case PKCS11_CKA_VALUE:
2133: boolsize = sizeof(boolval);
2134: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE,
2135: &boolval, &boolsize);
2136: if (rc || boolval == PKCS11_FALSE)
-- Call #3 at line 2140 --
2138:
2139: boolsize = sizeof(boolval);
2140: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE,
2141: &boolval, &boolsize);
2142: if (rc || boolval == PKCS11_TRUE)
-- Call #4 at line 2259 --
2257:
2258:
2259: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED,
2260: &boolval, &boolsize);
2261: if (rc || boolval == PKCS11_TRUE)
-- Call #5 at line 2456 --
2454:
2455:
2456: >>> rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);
2457: if (rc && rc != PKCS11_RV_NOT_FOUND)
2458: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "size",
        "rhs": "get_attribute_ptr(...) output size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr (caller buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "checks attr_size && *attr_size < size then sets *attr_size and returns BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1624,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes &bbool/&sz (TEE-private locals) as attr/attr_size to get_attribute; head originates from templates derived from REE input",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (!get_attribute(head, attribute, &bbool, &sz) && !!bbool == val)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 2134,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes &boolval/&boolsize (possibly from object attributes derived from REE) into get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(boolval),src_sz=unknown,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 2140,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes &boolval/&boolsize (object attrs) into get_attribute; attributes ultimately originate from templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(boolval),src_sz=unknown,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller passes &boolval/&boolsize (object attrs) into get_attribute; values are checked for trust flags",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(boolval),src_sz=unknown,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "caller requests PKCS11_CKA_VALUE_LEN into &key_length/&size where attribute storage may originate from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(key_length),src_sz=unknown,dst_sz=sizeof(key_length)"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller buffer attr via TEE_MemMove; if attr points to REE-visible memory this writes into shared memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159"
      },
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(...) initializes/updates count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks count != 0 and enforces count == 1, returning appropriate error codes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller passes head (attributes structure built from templates ultimately derived from REE input) into get_attribute_ptr; alias of possibly untrusted-origin attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr out-parameter is bound to storage inside attribute structures (may alias into template-derived memory)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size out-parameter is written with attribute size returned from get_attribute_ptrs; size may originate from untrusted attribute metadata",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "cur",
      "end",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "next_off",
      "found",
      "attr_ptr",
      "attr_size_ptr",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "bytes copied from cur via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*attr_size_ptr (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "count",
        "rhs": "found (updated loop-local)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } — detects overflow/exceeding length and panics"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur (untrusted-derived buffer) via TEE_MemMove and uses pkcs11_ref.size to compute next_off without robust validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (from untrusted bytes) in next_off arithmetic (cur += next_off), enabling out-of-bounds/oversize traversal if manipulated",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=end - cur"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Assigns pointers into the attributes blob (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; these pointers alias into template-derived memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 137,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Writes attribute sizes (pkcs11_ref.size) into caller attr_size array; sizes originate from untrusted attribute metadata",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "*attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Panics if parsing advances past end (cur > end); malformed or crafted pkcs11_ref.size can trigger panic (availability risk)",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=next_off"
        ]
      },
      "code_excerpt": "if (cur > end) { DMSG(\"Exceeding serial object length\"); TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: attr pointer parameter (from caller) is bound to storage provided by caller; may alias into REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*)*max_found,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: attr_size out-parameter is written with sizes coming from attribute metadata (untrusted-origin), binding caller buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t)*max_found,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: count in/out parameter updated with number of matches and returned to caller (influences caller control flow)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "dest",
        "rhs": "attr_ptr (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "dest",
        "rhs": "cur (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur (template/blob derived from REE) into local pkcs11_ref using supplied length, trusting blob fields for subsequent size arithmetic",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute data from attr_ptr into caller buffer attr; if attr points to REE-visible memory this writes into shared memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur and then uses cli_head.size to compute len; trusting unvalidated size field from blob can lead to out-of-bounds",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies small sample bytes from attribute payload into local data buffer using MIN(pkcs11_ref.size, sizeof(data)) — reads untrusted size but bounds with MIN",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized head from ref into local head via fixed-size move; if ref is attacker-controlled this aliases attacker data into head fields",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer without explicit bounds check on pre length (caller must ensure pre has space)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies a fixed-size pkcs11_attribute_head from cur using sizeof(pkcs11_ref) where cur is advanced over an untrusted blob; loop condition uses cur < end but does not ensure enough bytes remain for sizeof(pkcs11_ref) prior to the copy, and the copied pkcs11_ref.size is later used in arithmetic (next_off) without adequate validation.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Attributes blob originally derived from REE-supplied templates (params)",
      "propagation_path": [
        "params (REE) -> templates -> pub_head/priv_head (TEE-private) @ processing.c:450-468",
        "head (obj_attrs) -> get_attribute_ptrs cur/end computed from head->attrs_size @ attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads untrusted bytes into local struct @ attributes.c:119"
      ],
      "sink": "TEE_MemMove copies header from blob into local pkcs11_ref and its size field is used for subsequent pointer/offset arithmetic"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls the serialized attributes blob provided via REE (params)",
        "No additional validation ensuring at least sizeof(pkcs11_attribute_head) bytes remain at cur"
      ],
      "attack_scenario": "Crafted blob with truncated final entry or malicious pkcs11_ref.size causes get_attribute_ptrs to read beyond allocated blob or compute an oversized next_off, leading to over-read, pointer aliasing of attacker-controlled memory, or panic (TEE_Panic).",
      "impact": "Memory-safety violation (out-of-bounds read) can cause undefined behavior, potential crash (availability), or leakage of adjacent memory contents (confidentiality)."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Ensure (end - cur) >= sizeof(pkcs11_attribute_head) before copying; validate pkcs11_ref.size against remaining buffer and reject malformed entries."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size for reasonable upper bounds (and non-negative) before using in next_off arithmetic to prevent overflow or huge jumps."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy from blob via TEE_MemMove using fixed sizeof into local struct.",
        "Subsequent use of pkcs11_ref.size in next_off arithmetic without strong validation.",
        "Loop condition cur < end does not explicitly guarantee sizeof(pkcs11_ref) bytes available."
      ],
      "negative_indicators": [
        "There is a later check if (cur > end) that leads to TEE_Panic, providing some detection of over-advance (availability mitigation but too late for over-read)."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy reads a fixed header from an untrusted blob without ensuring the header fits entirely in the remaining buffer; the header's size field then influences buffer traversal, thus meeting memory-safety vulnerability criteria.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Fixed-size copy of pkcs11_attribute_head from cur without ensuring enough remaining bytes; pkcs11_ref.size (untrusted) is then used for pointer arithmetic."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially validated via head->attrs_size used to compute end, and loop uses cur < end",
      "evidence": "attributes.c:107-108,115"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure classification for the same line, but attacker-controlled blobs can still cause pointer aliasing that later copies (e.g., get_attribute -> TEE_MemMove to caller buffers) may expose data."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of unvalidated fixed-size read from untrusted blob.",
      "Use of untrusted size field in arithmetic after copy."
    ],
    "negative_indicators": [
      "Loop initial condition cur < end provides partial protection; panic check exists later."
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety precedence: the TEE_MemMove at line 119 performs a header-sized copy from an untrusted-derived blob without ensuring the header fits in the remaining buffer; this is a weak input validation leading to potential out-of-bounds read/processing and possible crash or data exposure.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=end - cur"
        ]
      },
      "why": "Uses pkcs11_ref.size (from untrusted blob) in next_off arithmetic enabling out-of-bounds traversal if manipulated.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 131,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "why": "Assigns pointers into the attributes blob (cur + sizeof(pkcs11_ref)) into caller-supplied attr array; these pointers alias into template-derived memory.",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 137,
      "function": "get_attribute_ptrs",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Writes attribute sizes (pkcs11_ref.size) into caller attr_size array; sizes originate from untrusted attribute metadata.",
      "code_excerpt": "*attr_size_ptr++ = pkcs11_ref.size;"
    }
  ]
}
フロー #43: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> attribute_is_exportable -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_get_attribute_valueattribute_is_exportableget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 162.91秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: serialized template buffer derived from REE via serialargs_alloc_get_attributes

シンク: TEE_MemMove reads header bytes from cur into local pkcs11_ref

判定理由: Memory-safety precedence: the call performs a fixed-size read from an untrusted/serialized buffer without ensuring adequate remaining bytes, which is a direct over-read risk (CWE-125).

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: attribute_is_exportable
プロンプト 中間 (attribute_is_exportable)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attribute_is_exportable” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [852]:
-- Call #1 at line 852 --
850:
851:
852: >>> 		if (!attribute_is_exportable(&cli_head, obj)) {
853:     			cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION;
854:     			TEE_MemMove(&cli_ref->size, &cli_head.size,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2110: bool attribute_is_exportable(struct pkcs11_attribute_head *req_attr,
2111: struct pkcs11_object *obj)
2112: {
2113: uint8_t boolval = 0;
2114: uint32_t boolsize = 0;
2115: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
2116: enum pkcs11_class_id key_class = get_class(obj->attributes);
2117:
2118: if (attribute_is_hidden(req_attr))
2119: return false;
2120:
2121: if (key_class != PKCS11_CKO_SECRET_KEY &&
2122: key_class != PKCS11_CKO_PRIVATE_KEY)
2123: return true;
2124:
2125: switch (req_attr->id) {
2126: case PKCS11_CKA_PRIVATE_EXPONENT:
2127: case PKCS11_CKA_PRIME_1:
2128: case PKCS11_CKA_PRIME_2:
2129: case PKCS11_CKA_EXPONENT_1:
2130: case PKCS11_CKA_EXPONENT_2:
2131: case PKCS11_CKA_COEFFICIENT:
2132: case PKCS11_CKA_VALUE:
2133: boolsize = sizeof(boolval);
2134: rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE,
2135: &boolval, &boolsize);
2136: if (rc || boolval == PKCS11_FALSE)
2137: return false;
2138:
2139: boolsize = sizeof(boolval);
2140: rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE,
2141: &boolval, &boolsize);
2142: if (rc || boolval == PKCS11_TRUE)
2143: return false;
2144: break;
2145: default:
2146: break;
2147: }
2148:
2149: return true;
2150: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attribute_is_exportable",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"attribute_is_exportable",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (attribute_is_exportable)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attribute_is_exportable",
    "tainted_vars": [
      "req_attr",
      "obj",
      "key_class",
      "boolval",
      "boolsize",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "key_class",
        "rhs": "get_class(obj->attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2116"
      },
      {
        "lhs": "boolval",
        "rhs": "get_attribute(..., PKCS11_CKA_EXTRACTABLE, &boolval, &boolsize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2134-2136"
      },
      {
        "lhs": "boolval",
        "rhs": "get_attribute(..., PKCS11_CKA_SENSITIVE, &boolval, &boolsize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2139-2143"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2118-2119",
        "evidence": "attribute_is_hidden(req_attr) early return"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2121-2123",
        "evidence": "class check to allow non-key classes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 852,
      "function": "attribute_is_exportable",
      "rule": "other",
      "why": "Binding: address of client-side attribute header (cli_head, located inside template derived from REE-provided serial data) passed as req_attr; origin mixes REE-derived content with TA allocation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=template->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "if (!attribute_is_exportable(&cli_head, obj)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 852,
      "function": "attribute_is_exportable",
      "rule": "other",
      "why": "Binding: object pointer 'obj' (resolved from handle earlier) passed into callee; object attributes are TA-resident but may contain sensitive flags/values.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_object)"
        ]
      },
      "code_excerpt": "if (!attribute_is_exportable(&cli_head, obj)) {"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_exportable at lines [2134, 2140, 2259, 2456]:
-- Call #1 at line 2134 --
2132: case PKCS11_CKA_VALUE:
2133: boolsize = sizeof(boolval);
2134: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_EXTRACTABLE,
2135: &boolval, &boolsize);
2136: if (rc || boolval == PKCS11_FALSE)
-- Call #2 at line 2140 --
2138:
2139: boolsize = sizeof(boolval);
2140: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_SENSITIVE,
2141: &boolval, &boolsize);
2142: if (rc || boolval == PKCS11_TRUE)
-- Call #3 at line 2259 --
2257:
2258:
2259: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED,
2260: &boolval, &boolsize);
2261: if (rc || boolval == PKCS11_TRUE)
-- Call #4 at line 2456 --
2454:
2455:
2456: >>> rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);
2457: if (rc && rc != PKCS11_RV_NOT_FOUND)
2458: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "rc",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size (from get_attribute_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (destination)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: 'head' parameter aliases caller-provided object attributes pointer (origin TA-private but may wrap REE-derived data); origin recorded for caller reasoning.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: 'attr' is destination pointer supplied by caller (often &boolval or &key_length) and will receive size bytes from attr_ptr via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "get_attribute",
      "rule": "other",
      "why": "Binding: 'attr_size' is caller-provided length pointer; it is read and may be updated with required size causing control flow (BUFFER_TOO_SMALL path).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "rc",
        "rhs": "return code based on count checks (0/NOT_FOUND/GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks on count: if (!count) return NOT_FOUND; if (count != 1) return GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'head' parameter aliases caller's attributes container (origin may be TA-private or derived from REE), used to locate attribute pointers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct obj_attrs)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'attr_ptr' is an out-parameter passed by caller to receive address of attribute data; it may point into TA memory derived from head/template.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=pointer_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'attr_size' is a caller-supplied length pointer used for size reporting and checked by this function; caller influence can drive BUFFER_TOO_SMALL flows upstream.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "found",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "contents at cur copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into template region)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*attr_size (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:110-111",
        "evidence": "uses max_found = *count and found tracking to limit outputs"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 107,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'head' originates from caller attributes container (may embed REE-derived template); used for pointer arithmetic to compute cur/end.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size+sizeof(struct obj_attrs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 112,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'attr' is caller-supplied out-pointer array; pointers stored point into template region (cur + sizeof(pkcs11_ref)).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=pkcs11_ref.size,dst_sz=pointer_array_length"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 113,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'attr_size' is caller-provided size array; receives pkcs11_ref.size values which influence upstream buffer checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=pkcs11_ref.size,dst_sz=number_of_matches*4"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 110,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'count' is input/output controlling max_found and updated to actual found count; caller-provided value drives loop termination and outputs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=*count,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "size_t max_found = *count; ... *count = found;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "contents copied from src via TEE_MemMove(dst, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header bytes from template region (cur) into local pkcs11_ref on stack; source may originate from REE-derived serialized data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=template->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr (TA-resident pointer into template) into caller buffer 'attr' (often TA-local); size driven by attr_ptr-derived size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies client-supplied attribute header from template into local cli_head; source may be REE-derived template memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=template->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized attribute header from ref_attr into pkcs11_ref (local); ref_attr may point into REE-origin template.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header from ref_attr into local pkcs11_ref prior to lookup; source origin may be untrusted serialized data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into prefix2 buffer; length derived from prefix_len may allow out-of-bounds if prefix_len incorrect.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=prefix_len+1,dst_sz=allocated_prefix2_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from cur into pkcs11_ref (local) while iterating template; source may be REE-derived.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=template->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies few bytes of attribute data into local small buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); source size controlled by pkcs11_ref, which is untrusted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized header 'head' from ref into local head variable; ref may be REE-derived leading to untrusted content in local structure.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=ref_size,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into pre buffer prior to logging; destination 'pre' may be uninitialized leading to potential memmove into invalid memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur without verifying that cur + sizeof(pkcs11_ref) <= end; cur is driven by template attrs_size from serialized input (potential over-read of untrusted data).",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "serialized template buffer derived from REE via serialargs_alloc_get_attributes",
      "propagation_path": [
        "params (REE) -> template (serialargs_alloc_get_attributes) @ object.c:777-779",
        "template -> cur/end pointers @ attributes.c:107-108",
        "cur (template region) read into pkcs11_ref via TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reads header bytes from cur into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or supplies serialized template data (via REE caller) that results in template->attrs_size smaller than expected",
        "No additional checks are performed to ensure sizeof(pkcs11_ref) bytes remain at cur"
      ],
      "attack_scenario": "Craft a serialized template where cur is near end so that TEE_MemMove reads beyond the allocated template, causing an out-of-bounds read and potential information disclosure or crash.",
      "impact": "Out-of-bounds read can disclose adjacent TA memory or cause a crash leading to denial of service; may enable further attacks depending on memory layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure (cur + sizeof(struct pkcs11_attribute_head)) <= end before calling TEE_MemMove; validate pkcs11_ref.size after safely reading header."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:120-121",
        "recommendation": "Validate pkcs11_ref.size is sane (e.g., not causing next_off to overflow) and that next_off does not advance beyond end."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur and end to iterate serialized buffer",
        "TEE_MemMove reads fixed-size header at cur without prior check of remaining bytes"
      ],
      "negative_indicators": [
        "There is an overall cur<end loop condition and a later cur> end panic check, but no explicit check that sizeof(header) bytes remain before the copy"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: the call performs a fixed-size read from an untrusted/serialized buffer without ensuring adequate remaining bytes, which is a direct over-read risk (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads sizeof(pkcs11_ref) from cur without verifying sufficient remaining bytes in template (possible out-of-bounds read)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    },
    {
      "type": "type_validation",
      "location": "get_attribute_ptrs:110-111",
      "evidence": "uses max_found = *count and found to limit outputs"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Contains attrs_size used to bound parsing, but attrs_size is derived from serialized input and must be validated",
      "evidence": "attributes.c:107-108"
    },
    {
      "arg": "cur",
      "why_safe": "Loop checks cur < end before iteration but does not ensure header-sized read fits in remaining bytes",
      "evidence": "attributes.c:115-121"
    }
  ],
  "residual_risks": [
    "119: potential information disclosure suppressed by memory-safety focus—if out-of-bounds read occurs it could expose TA memory"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size memmove from buffer parsed from untrusted serialized data",
      "Absence of explicit check ensuring header-sized region remains"
    ],
    "negative_indicators": [
      "Loop condition cur < end exists and there is a later panic check for cur > end"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The strongest concern is memory-safety: a fixed-size read occurs without verifying the remaining buffer length, producing a clear CWE-125 out-of-bounds read vulnerability; other concerns (e.g., disclosure to REE) are secondary and reported as structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies template (attributes) into REE-visible out buffer; may expose sensitive attributes if attr_sensitive was set earlier.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller memref (REE-visible); destination is shared but rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "get_attribute_ptrs / related",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies attribute bytes into small local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size is attacker-controlled and earlier header read may be unsafe.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    }
  ]
}
フロー #44: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_certificate -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_certificateget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 156.23秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: caller-provided attributes buffer (params/serial template) originating from REE

シンク: TEE_MemMove copies header bytes from cur into local pkcs11_ref without ensuring sizeof(header) fits in remaining buffer

判定理由: The copy at line 119 reads a fixed-size header from a cursor computed from an attributes buffer whose bounds are controlled by upstream REE-derived size; there is no check that sizeof(header) fits in remaining bytes before the copy, making an out-of-bounds read feasible (memory-safety first).

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: attr_is_modifiable_certificate
プロンプト 中間 (attr_is_modifiable_certificate)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_certificate” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2353]:
-- Call #1 at line 2353 --
2351: return false;
2352: case PKCS11_CKO_CERTIFICATE:
2353: >>> return attr_is_modifiable_certificate(req_attr, session, obj);
2354: default:
2355: break;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2250: static bool attr_is_modifiable_certificate(struct pkcs11_attribute_head *attr,
2251: struct pkcs11_session *session,
2252: struct pkcs11_object *obj)
2253: { 2254: uint8_t boolval = 0; 2255: uint32_t boolsize = 0; 2256: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 2257: 2258: 2259: rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, 2260: &boolval, &boolsize); 2261: if (rc || boolval == PKCS11_TRUE) 2262: return false; 2263: 2264: 2265: switch (attr->id) { 2266: case PKCS11_CKA_TRUSTED: 2267: 2272: return pkcs11_session_is_so(session); 2273: case PKCS11_CKA_CERTIFICATE_TYPE: 2274: case PKCS11_CKA_CERTIFICATE_CATEGORY: 2275: return false; 2276: default: 2277: break; 2278: } 2279: 2280: 2281: switch (get_certificate_type(obj->attributes)) { 2282: case PKCS11_CKC_X_509: 2283: 2287: switch (attr->id) { 2288: case PKCS11_CKA_ID: 2289: case PKCS11_CKA_ISSUER: 2290: case PKCS11_CKA_SERIAL_NUMBER: 2291: return true; 2292: default: 2293: break; 2294: } 2295: break; 2296: default: 2297: 2298: break; 2299: } 2300: 2301: return false; 2302: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_certificate", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_certificate", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_certificate)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_certificate",
    "tainted_vars": [
      "attr",
      "attr->id",
      "session",
      "obj",
      "boolval",
      "boolsize"
    ],
    "propagation": [
      {
        "lhs": "boolval, boolsize",
        "rhs": "get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2259-2261"
      },
      {
        "lhs": "return value",
        "rhs": "checks on boolval and attr->id and certificate type",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2261-2273,2281-2294"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2261-2262",
        "evidence": "checks rc and boolval == PKCS11_TRUE to early-return"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "alias of caller-provided req_attr (attribute header) passed into callee; req_attr originates from parsed REE-supplied data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "alias of session pointer passed into callee; session provenance is upstream and may be tainted/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "alias of obj pointer passed into callee; obj is TA-managed but originates from earlier handle resolution",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "attr_is_modifiable_certificate",
      "rule": "weak_input_validation",
      "why": "reads trusted attribute from obj->attributes into boolval/boolsize and uses boolval without validating returned size matches expected",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=boolsize,src_sz=unknown,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize); if (rc || boolval == PKCS11_TRUE) return false;"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_certificate at lines [2259, 2456]:
-- Call #1 at line 2259 --
2257:
2258:
2259: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED,
2260: &boolval, &boolsize);
2261: if (rc || boolval == PKCS11_TRUE)
-- Call #2 at line 2456 --
2454:
2455:
2456: >>> rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);
2457: if (rc && rc != PKCS11_RV_NOT_FOUND)
2458: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176"
      },
      {
        "lhs": "*attr_size (when provided)",
        "rhs": "comparison against size and potential update to size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr (destination buffer)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) (copy from attr_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding of head argument at call site: head is obj->attributes (TA-managed) passed into get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding of attr and attr_size arguments at call site: caller passes &boolval and &boolsize (local TA buffers) into get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=boolsize,src_sz=unknown,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from attr_ptr into attr via TEE_MemMove after only checking attr_size (if provided); attr_ptr provenance and size trust rely on get_attribute_ptr",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(*attr_size if provided)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "binding at second call site: head (from caller *head), attr=&key_length, attr_size=&size passed into get_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return code",
        "rhs": "checks on count (if !count -> NOT_FOUND; if count!=1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "function enforces count==1 (returns NOT_FOUND or GENERAL_ERROR otherwise)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call site: head (attributes list) passed into get_attribute_ptr originates from caller and may be REE-derived or TA-managed depending on origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call site: candidate/head pointer passed in may reference attributes derived earlier (possibly REE-origin); attr_ptr and size are outputs bound to caller variables",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "binding at call site: *head and pkcs11_ref.id used to locate attribute; outputs (value,size) are written to caller-provided buffers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "delegates to get_attribute_ptrs and relies on count checks but does not validate attr_ptr/attr_size contents beyond count==1",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count); if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "found",
      "attr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref (header fields)",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (pkcs11_ref.size derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr (when filled)",
        "rhs": "cur + sizeof(pkcs11_ref) assigned when pkcs11_ref.size != 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-135"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "for (; cur < end; cur += next_off) loop uses cur<end as loop bound and breaks when found==max_found"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of head argument at call site: head may originate from caller (could be REE-derived or TA-managed) and is used to compute cur/end",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=NA"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of attr (attr pointers array) at call site: attr pointers are written from inside loop and then observed by caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=sizeof(void*)*(*count)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "binding of attr_size pointer at call site: per-attribute sizes are written into caller-provided buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=unknown,dst_sz=sizeof(uint32_t)*(*count)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads attribute header from cur (derived from head which may be REE-supplied) and uses pkcs11_ref.size to compute next offset without ensuring sizeof(header)+size stays within end before use",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src (read) copied n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller (get_attribute) checks attr_size against size and returns BUFFER_TOO_SMALL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from cur (derived from head which may be REE-supplied) into local pkcs11_ref and then uses pkcs11_ref.size to compute offsets without ensuring header+size fit before use",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr into caller-provided buffer attr; caller previously checked sizes but attr_ptr provenance depends on earlier lookup",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(*attr_size if provided)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies small sample bytes from cur+sizeof(pkcs11_ref) into local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size derived from untrusted data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies a prefix string into pre (caller-provided); origin of pre and prefix may be REE-derived or set earlier—potential aliasing of shared buffer into logging output",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur into local header where cur is computed from head + offset; if end - cur < sizeof(pkcs11_ref) (head->attrs_size controlled by upstream REE data) this over-reads/reads out-of-bounds; loop uses cur<end but does not ensure header+payload fit before the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-provided attributes buffer (params/serial template) originating from REE",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_alloc_get_attributes -> template (object.c:1002-1004)",
        "template -> create_attributes_from_template -> head (object.c:1047-1052)",
        "head (attrs) passed into get_attribute_ptrs via get_attribute_ptr -> get_attribute (attributes.c:158,176)",
        "cur = (char*)head + sizeof(struct obj_attrs); TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (attributes.c:107-119)"
      ],
      "sink": "TEE_MemMove copies header bytes from cur into local pkcs11_ref without ensuring sizeof(header) fits in remaining buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE input used to build the serialized attributes list (head->attrs_size) or crafted serial object where end - cur < sizeof(pkcs11_ref).",
        "Normal-world caller is able to pass the crafted params into the TA command that leads to processing of this attributes list."
      ],
      "attack_scenario": "A malicious REE client supplies a serialized attributes blob with truncated data so that when the TA reaches this loop, TEE_MemMove reads past the valid region, causing an out-of-bounds read (and potentially subsequent logic using corrupted header fields).",
      "impact": "Out-of-bounds read can lead to crashes (TEE_Panic), logic corruption (wrong sizes/IDs), or information disclosure of adjacent TA memory depending on downstream usage."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (end - cur) >= sizeof(pkcs11_ref) before calling TEE_MemMove, and validate sizeof(pkcs11_ref)+pkcs11_ref.size <= (end - cur) before using pkcs11_ref.size."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "After reading header, ensure pkcs11_ref.size is within acceptable limits (e.g., not excessively large) and that next_off does not overflow size_t."
      },
      {
        "type": "mem_access_check",
        "location": "higher:when parsing template",
        "recommendation": "Sanitize and validate the serialized template length and contents when created/decoded from REE memory to ensure internal consistency before iterating."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove from cur (derived from head and head->attrs_size) without pre-copy size check.",
        "Upstream head->attrs_size is sourced from REE-parsed data (serialargs), making cur/end attacker-controllable."
      ],
      "negative_indicators": [
        "Loop condition uses cur < end which provides some mitigation for many cases; there is a later check cur > end that TEE_Panic()s but it is after potential unsafe uses.",
        "No explicit exploit demonstrated in code, only clear potential for over-read if attacker crafts truncated entries."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy at line 119 reads a fixed-size header from a cursor computed from an attributes buffer whose bounds are controlled by upstream REE-derived size; there is no check that sizeof(header) fits in remaining bytes before the copy, making an out-of-bounds read feasible (memory-safety first).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) can read beyond end when cur is near end and remaining bytes < sizeof(pkcs11_ref) due to untrusted head->attrs_size."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "get_attribute checks attr_size against size and returns BUFFER_TOO_SMALL before copying to provided destination"
    },
    {
      "type": "loop_bound",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "for (; cur < end; cur += next_off) uses cur<end as loop bound"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not_safe",
      "evidence": "head->attrs_size originates from parsed REE data (serialargs) earlier in call chain; validation insufficient to guarantee internal consistency (object.c:1002-1040, attributes.c:107-119)"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses an information-disclosure classification for downstream copies; however, if header read is forced but subsequent code copies payloads to REE-visible buffers, unencrypted_output risk may still exist elsewhere."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of unvalidated length fields to bound/advance cursor before and after copies.",
      "Multiple call sites where untrusted serialized data is parsed and used."
    ],
    "negative_indicators": [
      "Some higher-level checks exist (e.g., serialargs_remaining_bytes) but are not sufficient to ensure header fits at every iteration point."
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety issue (out-of-bounds read) is present at the TEE_MemMove call on line 119 because the code copies a fixed-size header from a cursor computed from an attacker-controllable length without confirming enough bytes remain; this outweighs other classifications and warrants remediation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads header from untrusted serialized attributes buffer and uses its size field to compute offsets without validating header fits in remaining buffer.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(*attr_size if provided)"
        ]
      },
      "why": "Copies attribute payload into caller buffer after a size check, but attr_ptr provenance depends on earlier parsing; potential issues if earlier parsing was inconsistent.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "Allocates attributes template from serialized REE data without strong validation of attrs_size relative to buffer.",
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}
フロー #45: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_certificate -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_certificateget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 177.41秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: caller-supplied serialized attributes buffer (head / cur) derived from REE-visible template/control buffer

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at attributes.c:119

判定理由: The sink performs a fixed-size read from a cursor into a buffer whose remaining size is not validated for the header length; this is a classical out-of-bounds/weak-input-validation issue (CWE-125) with high-confidence evidence.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: attr_is_modifiable_certificate
プロンプト 中間 (attr_is_modifiable_certificate)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attr_is_modifiable_certificate” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attribute_is_modifiable at lines [2353]:
-- Call #1 at line 2353 --
2351: return false;
2352: case PKCS11_CKO_CERTIFICATE:
2353: >>> return attr_is_modifiable_certificate(req_attr, session, obj);
2354: default:
2355: break;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2250: static bool attr_is_modifiable_certificate(struct pkcs11_attribute_head *attr,
2251: struct pkcs11_session *session,
2252: struct pkcs11_object *obj)
2253: { 2254: uint8_t boolval = 0; 2255: uint32_t boolsize = 0; 2256: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 2257: 2258: 2259: rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, 2260: &boolval, &boolsize); 2261: if (rc || boolval == PKCS11_TRUE) 2262: return false; 2263: 2264: 2265: switch (attr->id) { 2266: case PKCS11_CKA_TRUSTED: 2267: 2272: return pkcs11_session_is_so(session); 2273: case PKCS11_CKA_CERTIFICATE_TYPE: 2274: case PKCS11_CKA_CERTIFICATE_CATEGORY: 2275: return false; 2276: default: 2277: break; 2278: } 2279: 2280: 2281: switch (get_certificate_type(obj->attributes)) { 2282: case PKCS11_CKC_X_509: 2283: 2287: switch (attr->id) { 2288: case PKCS11_CKA_ID: 2289: case PKCS11_CKA_ISSUER: 2290: case PKCS11_CKA_SERIAL_NUMBER: 2291: return true; 2292: default: 2293: break; 2294: } 2295: break; 2296: default: 2297: 2298: break; 2299: } 2300: 2301: return false; 2302: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "attr_is_modifiable_certificate", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"attr_is_modifiable_certificate", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (attr_is_modifiable_certificate)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attr_is_modifiable_certificate",
    "tainted_vars": [
      "attr",
      "session",
      "obj",
      "boolval",
      "boolsize",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "boolval,boolsize,rc",
        "rhs": "get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2259-2261"
      },
      {
        "lhs": "decision on modifiability",
        "rhs": "switch on attr->id and get_certificate_type(obj->attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2265-2295,2281-2295"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2261-2262",
        "evidence": "Checks rc and boolval to early-return false when certificate is marked trusted"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter (&cli_ref) aliases parsed attribute header originating from REE-supplied template",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(struct pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "Call-site binding: 'session' parameter aliases session derived earlier (session provenance from ctrl buffer/lookup)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2353,
      "function": "attr_is_modifiable_certificate",
      "rule": "other",
      "why": "Call-site binding: 'obj' parameter is TA object pointer from handle lookup (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct pkcs11_object *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return attr_is_modifiable_certificate(req_attr, session, obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "attr_is_modifiable_certificate",
      "rule": "weak_input_validation",
      "why": "Uses obj attributes and attr->id (some originating from caller) to decide modifiability; attr payload/size not re-validated before decisions",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(boolval),src_sz=head->attrs_size,dst_sz=sizeof(boolval)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    }
  ]
}

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attr_is_modifiable_certificate at lines [2259, 2456]:
-- Call #1 at line 2259 --
2257:
2258:
2259: >>> rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED,
2260: &boolval, &boolsize);
2261: if (rc || boolval == PKCS11_TRUE)
-- Call #2 at line 2456 --
2454:
2455:
2456: >>> rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);
2457: if (rc && rc != PKCS11_RV_NOT_FOUND)
2458: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: { 172: enum pkcs11_rc rc = PKCS11_CKR_OK; 173: void *attr_ptr = NULL; 174: uint32_t size = 0; 175: 176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size); 177: if (rc) 178: return rc; 179: 180: if (attr_size && *attr_size < size) { 181: *attr_size = size; 182: 183: return PKCS11_CKR_BUFFER_TOO_SMALL; 184: } 185: 186: if (attr) 187: TEE_MemMove(attr, attr_ptr, size); 188: 189: if (attr_size) 190: *attr_size = size; 191: 192: return PKCS11_CKR_OK; 193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr,size",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "*attr_size = size or updated when too small",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
      },
      {
        "lhs": "attr",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) copying from attr_ptr into caller buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases obj->attributes passed from caller (object attribute store)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter (&boolval) is TA-local destination buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(boolval),src_sz=unknown,dst_sz=boolsize"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2259,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter (&boolsize) is TA-local size pointer used for bounds check",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, PKCS11_CKA_TRUSTED, &boolval, &boolsize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases *head (template-derived attributes) which may originate from REE-supplied data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter (&key_length) is TA-local destination for retrieved size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(key_length),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2456,
      "function": "get_attribute",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter (&size) is TA-local and used for bounds reporting/checking",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute(*head, PKCS11_CKA_VALUE_LEN, &key_length, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from attr metadata; correctness depends on get_attribute_ptr's validation of attr_ptr/size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr,attr_size,count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-158"
      },
      {
        "lhs": "rc",
        "rhs": "count checks -> return NOT_FOUND/GENERAL_ERROR/OK based on count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count == 0 -> NOT_FOUND, count != 1 -> GENERAL_ERROR, else OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' passed by caller (obj->attributes or template-derived) and flows into resolver; origin may be REE-derived for templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' out-parameter will point into attribute storage resolved by helper; caller may copy from it later",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter receives size from resolver and is later used for bounds decisions",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on get_attribute_ptrs to validate attribute pointers/sizes; only checks returned count, not individual attr_ptr/attr_size correctness",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 160,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Returns NOT_FOUND when count==0 and GENERAL_ERROR when count!=1; callers depend on these semantics for control flow",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(count),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) read from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "set to cur + sizeof(pkcs11_ref) / pkcs11_ref.size when pkcs11_ref.id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop condition cur < end uses head->attrs_size to bound parsing"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided attribute storage; origin may be TA-private or REE-visible depending on caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter receives pointers into parsed storage (cur+sizeof(...)); these pointers may alias REE-visible memory when head originates from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_entries,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur via TEE_MemMove and uses pkcs11_ref.size to compute next_off without validating remaining buffer length against pkcs11_ref.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 145,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Computes next_off from untrusted pkcs11_ref.size and advances cur by next_off; if next_off causes cur > end the code panics (TEE_Panic), indicating insufficient validation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; ... if (cur > end) { TEE_Panic(0); }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Populates attr_size out-entries from pkcs11_ref.size which later callers use for bounds checks; correctness depends on pkcs11_ref.size integrity",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t) entries,src_sz=head->attrs_size,dst_sz=number_of_matches"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer passed to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer passed to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "n",
        "rhs": "size argument (often derived from parsed metadata or computed length)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller checks attr_size against size in get_attribute before invoking TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from cur into pkcs11_ref and uses pkcs11_ref.size to compute offsets without validating remaining buffer length first",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr into caller buffer 'attr' using size from metadata; correctness depends on attr_ptr/size validated upstream",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur and uses cli_head.size to set len without validating remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (possibly REE-origin) into local structure for further processing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref header from ref_attr before using its id to query attributes; relies on integrity of ref_attr contents",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_attr_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 buffer using prefix_len+1; depends on caller-provided prefix_len being correct",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix2_capacity"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+header into data; uses untrusted size for min computation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head structure from ref into local 'head' using sizeof(head); correctness assumes ref contains a valid head",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; depends on prefix buffer being large enough",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=pre_capacity"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur into local pkcs11_ref where cur is advanced based on untrusted head->attrs_size/parsed sizes; sizeof(pkcs11_ref) may exceed the remaining bytes => out-of-bounds read/invalid memory access.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-supplied serialized attributes buffer (head / cur) derived from REE-visible template/control buffer",
      "propagation_path": [
        "params (REE-visible) -> head (created from template) @ object.c:1163-1166",
        "head->attrs_size used to set parsing bounds -> cur = (char*)head + sizeof(struct obj_attrs) @ attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) at attributes.c:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker (REE) supplies a crafted template/serialized attributes buffer with manipulated attrs_size or truncated tail",
        "TA reaches get_attribute_ptrs parsing that buffer"
      ],
      "attack_scenario": "Provide a serialized attributes block whose declared attrs_size or contained pkcs11_ref.size cause cur to point near the buffer end; the MemMove at line 119 then reads beyond the buffer, causing out-of-bounds memory access or crash (TEE_Panic path may be triggered later).",
      "impact": "Potential denial-of-service (panic/crash) and, depending on platform, information disclosure or memory-corruption consequences."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (end - cur) >= sizeof(pkcs11_ref) before calling TEE_MemMove, and validate pkcs11_ref.size against remaining bytes before using it to compute next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of fixed-size header from cur without a prior check of remaining bytes",
        "Subsequent use of pkcs11_ref.size to compute offsets (next_off) without validating it"
      ],
      "negative_indicators": [
        "Loop condition uses cur < end (end computed from head->attrs_size) which provides some bounding, but does not guarantee sizeof(pkcs11_ref) bytes are available"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The sink performs a fixed-size read from a cursor into a buffer whose remaining size is not validated for the header length; this is a classical out-of-bounds/weak-input-validation issue (CWE-125) with high-confidence evidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads fixed-size attribute header from cur without ensuring remaining buffer length >= sizeof(header)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-115",
      "evidence": "loop uses cur < end where end = cur + head->attrs_size (provides a coarse bound but not an explicit header-size check)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially bounded via head->attrs_size used to compute end, providing some parsing limit",
      "evidence": "attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "119: potential information disclosure or persistence of corrupted state if out-of-bounds read leads to downstream copying of malformed lengths (memory-safety prioritized over disclosure)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Clear unvalidated use of pkcs11_ref.size and absence of explicit (end - cur) >= sizeof(header) check"
    ],
    "negative_indicators": [
      "Loop bound cur < end offers partial protection but is insufficiently precise"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety concern (out-of-bounds read) is evident and takes precedence; insufficient explicit header-length validation before the MemMove makes the line vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses untrusted pkcs11_ref.size to compute next_off and advance cur without validating remaining buffer length first.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Parses client-supplied attribute entries into cli_ref using TEE_MemMove without validating cli_ref.size against remaining bytes.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle to caller-provided out buffer; checked earlier that out->memref.size == sizeof(obj_handle).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #46: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> get_attribute -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_get_attribute_valueget_attributeget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 166.56秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Template buffer derived (indirectly) from REE-provided params (ctrl->memref.buffer) and parsed into 'template'

シンク: TEE_MemMove reads header from template buffer into local stack (possible out-of-bounds read)

判定理由: A direct memmove reads a fixed-size header from a buffer whose remaining length is only compared with cur < end; absence of a pre-read bounds check for the header and use of attacker-controlled size to advance the loop yields a clear out-of-bounds/read vulnerability (CWE-125).

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: get_attribute
プロンプト 中間 (get_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [867, 1188]:
-- Call #1 at line 867 --
865: * the size of the required buffer for it (3., 4.)
866: */
867: >>> rc = get_attribute(obj->attributes, cli_head.id, data_ptr,
868: &cli_head.size);
869:
-- Call #2 at line 1188 --
1186: uint32_t size = sizeof(bbool);
1187:
1188: >>> rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size);
1189:     		if (!rc && !bbool) {
1190:     			rc = add_attribute(&head, PKCS11_CKA_NEVER_EXTRACTABLE,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

169: enum pkcs11_rc get_attribute(struct obj_attrs *head, uint32_t attribute,
170: void *attr, uint32_t *attr_size)
171: {
172: enum pkcs11_rc rc = PKCS11_CKR_OK;
173: void *attr_ptr = NULL;
174: uint32_t size = 0;
175:
176: rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
179:
180: if (attr_size && *attr_size < size) {
181: *attr_size = size;
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;
193: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
      },
      {
        "lhs": "attr_size (out)",
        "rhs": "size (from get_attribute_ptr) propagated to *attr_size when provided",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      },
      {
        "lhs": "attr (output buffer)",
        "rhs": "TE E_MemMove(attr, attr_ptr, size) when attr != NULL",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 867,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'head' parameter receives obj->attributes (originating in TA object); callee parameter aliases caller's attributes storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, cli_head.id, data_ptr, &cli_head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 867,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'attr' parameter receives data_ptr which aliases cli_ref->data within template (TA-allocated); origin is TA-private buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=cli_head.size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, cli_head.id, data_ptr, &cli_head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 867,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'attr_size' parameter is &cli_head.size which is stored inside template (TA-private); size is driven by template content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(cli_head.size)"
        ]
      },
      "code_excerpt": "rc = get_attribute(obj->attributes, cli_head.id, data_ptr, &cli_head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1188,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'head' parameter receives 'head' (local attributes list) from caller context; origin is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1188,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'attr' parameter receives &bbool (local stack variable); callee will write into caller's stack memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1188,
      "function": "get_attribute (call-site binding)",
      "rule": "other",
      "why": "Binding: 'attr_size' parameter receives &size (local) controlling buffer size checks inside callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(size)"
        ]
      },
      "code_excerpt": "rc = get_attribute(head, PKCS11_CKA_EXTRACTABLE, &bbool, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr to attr via TEE_MemMove; relies on prior size check to avoid overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [176, 271, 300]:
-- Call #1 at line 176 --
174: uint32_t size = 0;
175:
176: >>> rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);
177: if (rc)
178: return rc;
-- Call #2 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #3 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return value rc",
        "rhs": "derived from get_attribute_ptrs result via count checks",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'head' parameter aliases caller's attributes pointer (origin may be TA-private object attributes or upstream caller), region uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'attr_ptr' out-parameter is provided by caller as &attr_ptr (local); callee will write pointer to caller memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Binding: 'attr_size' out-parameter is &size (local); callee sets size which influences later copies.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "pkcs11_ref",
      "next_off",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur,end",
        "rhs": "derived from head and head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "found, attr_ptr/attr_size_ptr writes",
        "rhs": "updated when pkcs11_ref.id matches attribute and max_found permits",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-141"
      },
      {
        "lhs": "*count",
        "rhs": "written from found at function end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "loop_bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "for (; cur < end; cur += next_off) uses head->attrs_size as limit"
      },
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) TEE_Panic(0) detects exceeding length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'head' argument from caller is aliased; function reads from head-based buffer (cur/end) and interprets sizes from it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'attr' out-parameter points into caller-provided buffer(s); callee writes pointers into caller memory via *attr_ptr++.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "if (attr) { if (pkcs11_ref.size) *attr_ptr++ = cur + sizeof(pkcs11_ref); else *attr_ptr++ = NULL; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Binding: 'attr_size' out-parameter receives sizes from pkcs11_ref.size; callee writes sizes into caller memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=pkcs11_ref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "if (attr_size) *attr_size_ptr++ = pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Reads pkcs11_attribute_head from potentially attacker-controlled template buffer via TEE_MemMove; pkcs11_ref.size used to advance loop and influence writes.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size where pkcs11_ref.size is from parsed buffer; a crafted size could cause loop misbehavior or overflow.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs)))"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-supplied destination pointer",
        "site": "callsites (various)"
      },
      {
        "lhs": "src",
        "rhs": "caller-supplied source pointer",
        "site": "callsites (various)"
      },
      {
        "lhs": "n",
        "rhs": "caller-supplied length",
        "site": "callsites (various)"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy; callers are expected to ensure bounds"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &pkcs11_ref is a local stack object; callee will write into caller stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'cur' points inside template buffer derived from head; origin is head-based buffer (parsed data).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'attr' is caller-provided buffer (may be TA-private or point into template); callee writes attribute payload into it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'attr_ptr' is pointer into attribute storage (from get_attribute_ptrs); callee reads from TA-side storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &cli_head is local stack; memmove writes parsed header into local struct.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'cur' reads from template buffer; parsed size influences subsequent logic.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &pkcs11_ref is local; writing ref header into stack from ref_attr source.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'ref_attr' is derived from caller data (possibly template/ref buffer); origin considered TEE-private here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &pkcs11_ref is local; callee writes header from ref_attr.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'ref_attr' originates from caller context; treated as TEE-private here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'prefix2' is TA-allocated buffer; writes prefix bytes into it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=allocated_size_of_prefix2"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'prefix' is provided by caller; origin region unknown (could be REE-visible or TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=allocated_size_of_prefix2"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &pkcs11_ref is local stack; writing header from cur.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &data[0] is local small buffer; writes up to MIN(pkcs11_ref.size, sizeof(data)) bytes from template payload.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination &head is local; memmove reads 'ref' into local head struct.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'pre' is local buffer expected to be provisioned; writing prefix bytes into it may overflow if 'pre' not sized correctly.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) from 'cur' which is advanced by head->attrs_size bounds but the loop condition uses cur < end (not cur+sizeof(pkcs11_ref) <= end), so a crafted pkcs11_ref.size or placement can cause an out-of-bounds read/loop misbehavior; source originates from parsed template derived from REE-controlled serial input.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Template buffer derived (indirectly) from REE-provided params (ctrl->memref.buffer) and parsed into 'template'",
      "propagation_path": [
        "params (caller REE memref) -> serialargs_alloc_get_attributes allocates template @ object.c:777-779",
        "template -> get_attribute_ptrs reads from cur derived from template @ attributes.c:107-119",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header into local stack @ attributes.c:119"
      ],
      "sink": "TEE_MemMove reads header from template buffer into local stack (possible out-of-bounds read)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls the serialized attribute blob provided in params->memref.buffer",
        "No upstream normalization/truncation prevents malformed pkcs11_ref.size or placement near end"
      ],
      "attack_scenario": "Crafted template where 'cur' is near template end or contains an oversized pkcs11_ref.size causes TEE_MemMove to read past the template bounds, potentially leaking memory or causing undefined behavior leading to crash or code corruption.",
      "impact": "Out-of-bounds read can leak sensitive memory or trigger undefined behavior/crash; subsequent logic uses pkcs11_ref.size influencing loop increments, enabling further memory-corrupting conditions."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before reading header and validate pkcs11_ref.size against remaining bytes to prevent next_off overflow."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size is within reasonable limits (and within remaining buffer) before using it to compute next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop uses cur < end rather than cur + sizeof(header) <= end before reading header",
        "Header size (pkcs11_ref.size) is taken from parsed data and used to compute next_off influencing loop",
        "Source template ultimately derived from REE-originated params via serialargs"
      ],
      "negative_indicators": [
        "There is a later check if (cur > end) TEE_Panic(0) which detects some overrun cases (panic), not prevention",
        "Template is allocated by TA code (serialargs_alloc_get_attributes) which may perform some validation (not visible here)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "A direct memmove reads a fixed-size header from a buffer whose remaining length is only compared with cur < end; absence of a pre-read bounds check for the header and use of attacker-controlled size to advance the loop yields a clear out-of-bounds/read vulnerability (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads fixed-size header from 'cur' without ensuring header fits in remaining buffer; pkcs11_ref.size (from that header) then used to compute offsets."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "for (; cur < end; cur += next_off) uses head->attrs_size as limit but does not check header-size before read"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially",
      "evidence": "head->attrs_size is used as loop bound at attributes.c:107-108 but not sufficient to prevent header pre-read overrun"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure classification (unencrypted_output) for this call because memory-safety takes precedence."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of cur < end without pre-read size check",
      "Attacker-influenced size fields used for control flow"
    ],
    "negative_indicators": [
      "TEE_Panic(0) on cur > end may abort on some overruns rather than silently succeed"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The memmove at line 119 performs a header-sized read from a buffer bounded only by cur < end; this allows crafted input to cause out-of-bounds reads or loop corruption, meeting memory-safety vulnerability criteria.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=head->attrs_size - (cur - ((char*)head + sizeof(struct obj_attrs)))"
        ]
      },
      "why": "Computed next_off uses pkcs11_ref.size from parsed header; a crafted size may cause loop misbehavior or arithmetic overflow leading to out-of-bounds.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Later copies template to REE-visible out->memref.buffer; if template contains sensitive attributes or malformed sizes, there is a structural risk of exposing data or truncation.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}
フロー #47: TA_InvokeCommandEntryPoint -> entry_wrap_key -> attributes_match_reference -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyattributes_match_referenceget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 121.47秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: head->attrs (attribute list buffer) derived from TA object storage

シンク: TEE_MemMove copying sizeof(pkcs11_ref) bytes into local struct

判定理由: Memory-safety precedence: insufficient validation of remaining bytes before copying a fixed-size header yields a clear out-of-bounds read risk at the call site; thus classified as vulnerable (weak_input_validation).

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: attributes_match_reference
プロンプト 中間 (attributes_match_reference)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “attributes_match_reference” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1250]:
-- Call #1 at line 1250 --
1248: PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);
1249:     	if (rc == PKCS11_CKR_OK && size != 0) {
1250: >>> 		if (!attributes_match_reference(key->attributes, req_attrs)) {
1251:     			rc = PKCS11_CKR_KEY_HANDLE_INVALID;
1252:     			goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

248: bool attributes_match_reference(struct obj_attrs *candidate,
249: struct obj_attrs *ref)
250: {
251: size_t count = ref->attrs_count;
252: unsigned char *ref_attr = ref->attrs;
253: uint32_t rc = PKCS11_CKR_GENERAL_ERROR;
254:
255: if (!ref->attrs_count) {
256: DMSG("Empty reference match all");
257: return true;
258: }
259:
260: for (count = 0; count < ref->attrs_count; count++) {
261: struct pkcs11_attribute_head pkcs11_ref = { };
262: void *value = NULL;
263: uint32_t size = 0;
264:
265: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
268: if (attribute_is_hidden(&pkcs11_ref))
269: return false;
270:
271: rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
274: TEE_MemCompare(ref_attr + sizeof(pkcs11_ref), value, size))
275: return false;
276:
277: ref_attr += sizeof(pkcs11_ref) + pkcs11_ref.size;
278: }
279:
280: return true;
281: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attributes_match_reference",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"attributes_match_reference",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (attributes_match_reference)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "attributes_match_reference",
    "tainted_vars": [
      "candidate",
      "ref",
      "ref->attrs_count",
      "ref_attr",
      "pkcs11_ref",
      "value",
      "size"
    ],
    "propagation": [
      {
        "lhs": "ref_attr",
        "rhs": "ref->attrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:252"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      },
      {
        "lhs": "value, size",
        "rhs": "get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:271-272"
      },
      {
        "lhs": "ref_attr",
        "rhs": "ref_attr + sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:277"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:255-258",
        "evidence": "if (!ref->attrs_count) return true"
      },
      {
        "kind": "equality_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:273-275",
        "evidence": "checks size == pkcs11_ref.size and compares contents with TEE_MemCompare"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1250,
      "function": "attributes_match_reference",
      "rule": "other",
      "why": "Call-site binding: 'candidate' parameter aliases key->attributes (TA-private) passed from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!attributes_match_reference(key->attributes, req_attrs)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1250,
      "function": "attributes_match_reference",
      "rule": "other",
      "why": "Call-site binding: 'ref' parameter aliases req_attrs (origin from wrapping key attribute retrieval); origin considered TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ref->attrs_count_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!attributes_match_reference(key->attributes, req_attrs)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "attributes_match_reference",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref->attrs without an explicit overall buffer-length check against ref->attrs_count/total bytes; malformed ref could cause out-of-bounds reads.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attributes_match_reference at lines [271, 300]:
-- Call #1 at line 271 --
269: return false;
270:
271: >>> rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);
272:
273: if (rc || !value || size != pkcs11_ref.size ||
-- Call #2 at line 300 --
298: TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: >>> rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302:     			rc = add_attribute(head, pkcs11_ref.id,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "returns NOT_FOUND if count==0, GENERAL_ERROR if count!=1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases candidate (key->attributes) from caller; origin is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' parameter aliases &value local passed by caller; pointer will point into candidate's storage (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 271,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases &size local passed by caller; size originates from candidate attributes (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(candidate, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases *head (list head) from caller; origin is TA-private internal list.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' parameter aliases &value local passed by caller; will point into attribute storage (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 300,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases &size local passed by caller; size used to compare with reference (TA-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "attr_ptr",
      "attr_size_ptr",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "cur + sizeof(pkcs11_ref) / pkcs11_ref.size when matching id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found at loop end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop uses cur < end and advances by next_off computed from pkcs11_ref.size"
      },
      {
        "kind": "panic_on_overflow",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) TEE_Panic(0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller's attribute list (origin TA-private internal object).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter aliases attr_ptr from caller; will be written with pointers into head's storage (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases attr_size from caller; will be written with sizes from head's attributes (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' parameter aliases &count local from caller; used to limit results and updated with found count.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_attribute_head from cur with TEE_MemMove using size from ref data; insufficient validation that remaining bytes >= sizeof(header) before copy.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Assigns pointers into attribute storage (cur + sizeof(pkcs11_ref)) into caller-supplied array without verifying overall array capacity (max_found), potential write-past of attr buffer.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=pkcs11_ref.size,dst_sz=max_found"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "multiple call sites (see structural_risks)"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "multiple call sites (see structural_risks)"
      },
      {
        "lhs": "n",
        "rhs": "requested copy length argument",
        "site": "multiple call sites (see structural_risks)"
      }
    ],
    "sanitizers": [
      {
        "kind": "none_explicit",
        "site": "TEE_MemMove call sites",
        "evidence": "caller responsibilities: no internal length checks visible here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur into local struct without an explicit remaining-bytes check before the copy; cur derived from head->attrs_size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value pointers/data into caller-supplied buffer 'attr' using size from attribute metadata; destination/capacity not validated here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies cli_head from cur into local struct without explicit check that remaining bytes >= header size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr into local struct without validating that ref->attrs contains enough bytes for header.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) from attribute payload into local buffer; header-to-payload size relation relies on prior header validity.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre without validating destination capacity here; caller must ensure pre allocated large enough.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies a header struct from cur into local pkcs11_ref using sizeof(header) while only guarding with cur < end; remaining-bytes >= sizeof(header) is not explicitly checked, enabling out-of-bounds read if ref data is truncated or malformed.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "head->attrs (attribute list buffer) derived from TA object storage",
      "propagation_path": [
        "head->attrs_size used to compute end and cur start -> cur advances by next_off @ attributes.c:107-121",
        "cur (pointer into attribute bytes) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove copying sizeof(pkcs11_ref) bytes into local struct"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed or truncated attribute blob such that end - cur < sizeof(pkcs11_ref)",
        "An attacker-controlled or corrupted attribute buffer (req_attrs) is provided to the code path"
      ],
      "attack_scenario": "A crafted attribute blob with truncated header causes TEE_MemMove to read past the valid buffer, potentially leaking adjacent memory or causing panic/undefined behavior.",
      "impact": "Out-of-bounds read leading to memory disclosure or crash (denial of service); in some contexts could enable further memory corruption."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Before TEE_MemMove, verify (end - cur) >= sizeof(pkcs11_attribute_head) and after computing next_off verify (end - cur) >= next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of fixed sizeof(header) from cur without explicit remaining-bytes >= sizeof(header) check",
        "Post-loop check (cur > end -> TEE_Panic) exists but does not prevent the unsafe copy"
      ],
      "negative_indicators": [
        "Loop condition cur < end provides partial protection if attrs_size is consistent",
        "cur advancement logic uses header-derived size which is typical, reducing likelihood of accidental trigger"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety precedence: insufficient validation of remaining bytes before copying a fixed-size header yields a clear out-of-bounds read risk at the call site; thus classified as vulnerable (weak_input_validation).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) performed without explicit check that remaining bytes >= sizeof(pkcs11_ref)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "loop condition 'for (; cur < end; cur += next_off)' ensures cur < end but does not guarantee enough bytes for sizeof(header)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially safe",
      "evidence": "head->attrs_size used to compute end and loop bounds @ attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses immediate information-disclosure classification here; however, malformed headers could still enable downstream logic to produce REE-visible outputs (e.g., wrapped key writes) if other checks fail."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy from potentially truncated buffer",
      "Multiple similar TEE_MemMove usages copying headers without explicit remaining-bytes checks"
    ],
    "negative_indicators": [
      "Loop cur < end offers partial guard depending on attrs_size correctness"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Classified as weak_input_validation (memory-safety) because the code performs a fixed-size copy from a buffer indexed by cur without robust verification of remaining bytes; this is the highest-priority class per policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_size,src_sz=pkcs11_ref.size,dst_sz=max_found"
        ]
      },
      "why": "Assigns pointers into attribute storage into caller-supplied array attr_ptr without explicit verification of caller-supplied array capacity (max_found).",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "attributes_match_reference",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Copies header from ref_attr without validating that ref buffer contains enough bytes for the header.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into REE-visible params[2].memref.buffer using out_size derived from params[2].memref.size; if out_buf capacity isn't validated against key_sz this may overwrite shared memory.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "attributes.c (debug print)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies prefix into pre without validating pre capacity at this site.",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #48: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretgenerate_random_key_valueget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 83.83秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-provided serialized template bytes (params->memref.buffer) -> template -> attributes buffer (head->... )

シンク: TEE_MemMove into local pkcs11_ref at get_attribute_ptrs:119

判定理由: Memory-safety precedence: fixed-size copy from a pointer into a buffer derived from untrusted input occurs without verifying available bytes, enabling out-of-bounds read; this is a clear weak input validation issue (CWE-125).

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_random_key_value at lines [177, 1247]:
-- Call #1 at line 177 --
175: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
176:
177: >>> rc = get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size);
178:     	if (rc || data_size != sizeof(uint32_t)) {
179:     		DMSG("%s", rc ? "No attribute value_len found" :
-- Call #2 at line 1247 --
1245:     		goto out;
1246:     
1247: >>> 	rc = get_attribute_ptr(wrapping_key->attributes,
1248:     			       PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);
1249:     	if (rc == PKCS11_CKR_OK && size != 0) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return code",
        "rhs": "count checks (if !count -> NOT_FOUND; if count != 1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks that exactly one attribute pointer was found (count != 0 and count == 1) before returning OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 177,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided head pointer (from caller's *head) is forwarded into get_attribute_ptr; origin not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 177,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr out-parameter is an alias to caller-local pointer (data) provided by caller; binding recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 177,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size out-parameter binds to caller's data_size; origin and limits not enforced here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*head, PKCS11_CKA_VALUE_LEN, &data, &data_size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into head buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-134"
      },
      {
        "lhs": "*attr_size (when set)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "count",
        "rhs": "*count = found (final write)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-provided head pointer is forwarded into the routine; origin (caller allocation / REE-derived template) not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr out-parameter (attr) is bound to caller-provided pointers; these become aliases to locations inside head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=*count"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size out-parameter is bound to caller variable and populated from pkcs11_ref.size; caller-visible size is set here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=pkcs11_ref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "count out-parameter binds to caller-supplied count and is overwritten with found count (used by caller to validate results)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "pkcs11_ref.size (from unvalidated template bytes) is used to compute next_off and advance cur without an upper bound check, enabling out-of-bounds next_off",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=(end-cur)"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (len bytes copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur (pointer into head buffer) into local pkcs11_ref; src provenance (template bytes) is ambiguous",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute pointer(s) into caller-provided attr array (out-parameter); creates aliases to locations inside head",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=*count"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local buffer; pkcs11_ref.size originates from untrusted template bytes and used without an explicit upper-limit validation beyond MIN",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer; destination origin and size not validated here (caller must ensure pre is large enough)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) bytes from cur into local struct without ensuring cur+sizeof(pkcs11_ref) <= end; pkcs11_ref/next_off are derived from untrusted template bytes, enabling out-of-bounds read/advancement.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided serialized template bytes (params->memref.buffer) -> template -> attributes buffer (head->... )",
      "propagation_path": [
        "params[0/ctrl].memref.buffer -> serialargs (processing.c:226)",
        "serialargs_alloc_get_attributes -> template (processing.c:236-238)",
        "create_attributes_from_template -> head (processing.c:263-267)",
        "get_attribute_ptrs: cur = (char*)head + sizeof(obj_attrs) (attributes.c:107) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (attributes.c:119)"
      ],
      "sink": "TEE_MemMove into local pkcs11_ref at get_attribute_ptrs:119"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled template bytes placed into params->memref.buffer",
        "Malformed attributes such that cur is near end and fewer than sizeof(pkcs11_ref) bytes remain"
      ],
      "attack_scenario": "A crafted template causes get_attribute_ptrs to read past the end of the attributes buffer via TEE_MemMove, potentially leaking memory or causing panic/abnormal termination.",
      "impact": "Out-of-bounds read leading to information disclosure or TA crash (TEE_Panic elsewhere) depending on memory layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that (cur + sizeof(pkcs11_ref)) <= end before calling TEE_MemMove; similarly validate next_off within remaining buffer and on loop entry."
      },
      {
        "type": "type_validation",
        "location": "upstream:processing.c:177-184",
        "recommendation": "Validate template-derived sizes (attrs_size and embedded pkcs11_ref.size) against reasonable maximums before parsing."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove at line 119 copies fixed sizeof(pkcs11_ref) from cur without a preceding explicit bounds check for that size",
        "next_off and pkcs11_ref.size are derived from untrusted/template bytes earlier in the chain"
      ],
      "negative_indicators": [
        "Loop condition cur < end exists, but does not guarantee space for sizeof(pkcs11_ref) at cur",
        "There is a later check (cur > end) that triggers TEE_Panic if over-advanced, but it occurs after the MemMove"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: fixed-size copy from a pointer into a buffer derived from untrusted input occurs without verifying available bytes, enabling out-of-bounds read; this is a clear weak input validation issue (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove copies sizeof(pkcs11_ref) from cur without verifying cur+sizeof(pkcs11_ref) <= end; pkcs11_ref.size is attacker-influenced."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "get_attribute_ptr:160-166",
      "evidence": "count checks ensure single attribute in higher-level helper, but do not prevent MemMove at current site"
    }
  ],
  "argument_safety": [
    {
      "arg": "cur/end (head->attrs_size)",
      "why_safe": "partial",
      "evidence": "Loop condition cur < end (attributes.c:115) prevents starting beyond end but does not ensure space for sizeof(pkcs11_ref)"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses but does not eliminate potential information disclosure classification for later flows where parsed pkcs11_ref.size may be used to copy data into REE-visible buffers."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy without size check",
      "Untrusted origin of parsed data"
    ],
    "negative_indicators": [
      "Presence of cur < end loop condition and post-loop panic check"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Marked vulnerable due to clear lack of bounds check before fixed-size copy from untrusted-derived buffer; memory-safety risk trumps other classifications.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size,dst_sz=(end-cur)"
        ]
      },
      "why": "Computes next_off = sizeof(pkcs11_ref) + pkcs11_ref.size where pkcs11_ref.size is from untrusted bytes and not upper-bounded, enabling out-of-bounds advancement.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "why": "value_len is taken from an attribute and used to TEE_Malloc without an explicit upper bound, allowing large allocations or resource exhaustion.",
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    }
  ]
}
フロー #49: TA_InvokeCommandEntryPoint -> entry_wrap_key -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 100.34秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: HIGH

テイントフロー:

ソース: head (object attributes buffer) originating from wrapping_key->attributes (TA object storage)

シンク: TEE_MemMove reading header from cur into local pkcs11_ref

判定理由: Memory-safety issue (insufficient input validation) is present because the header is read before ensuring enough source bytes remain; this precedence (bounds) takes priority over information-disclosure concerns.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1247]:
-- Call #1 at line 1247 --
1245: goto out;
1246:
1247: >>> rc = get_attribute_ptr(wrapping_key->attributes,
1248: PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);
1249:     	if (rc == PKCS11_CKR_OK && size != 0) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "1 (initialization)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks count == 0 (NOT_FOUND) and count != 1 (GENERAL_ERROR) before returning OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1247,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases wrapping_key->attributes (object attributes) from caller; origin is TA object storage (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(wrapping_key->attributes, PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1247,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attribute' parameter is a compile-time constant (PKCS11_CKA_WRAP_TEMPLATE) from caller; non-sensitive scalar.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(wrapping_key->attributes, PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1247,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' parameter is &req_attrs (caller local); callee may store pointer into caller variable (alias of TA-private stack/heap).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(void*),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(wrapping_key->attributes, PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1247,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter is &size (caller local uint32_t); callee writes size back to caller-controlled variable.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(wrapping_key->attributes, PKCS11_CKA_WRAP_TEMPLATE, &req_attrs, &size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (after TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-120"
      },
      {
        "lhs": "found",
        "rhs": "increment when pkcs11_ref.id == attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-126"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then TEE_Panic(0) (detects/exits on exceeding serial object length)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller-provided object attributes (wrapping_key->attributes) residing in TA memory (object storage).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attribute' parameter is caller-provided selector (likely constant from caller) used to match pkcs11_ref.id.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' parameter aliases caller's attr_ptr (may write pointers into caller variable); origin is caller-local TA memory (&req_attrs).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' parameter aliases caller's attr_size (writes attribute sizes back to caller &size).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' parameter is pointer to caller-local size_t initialized to 1; callee updates it with found count.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(size_t),src_sz=sizeof(size_t),dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "TEE_MemMove reads pkcs11_attribute_head from cur (derived from head) without explicit per-entry bounds check before using pkcs11_ref.size to compute next_off; later cur> end triggers panic but intermediate uses may dereference invalid lengths.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "first arg passed at call-site",
        "site": "call-sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "src",
        "rhs": "second arg passed at call-site",
        "site": "call-sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      },
      {
        "lhs": "len",
        "rhs": "third arg passed at call-site",
        "site": "call-sites in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      }
    ],
    "sanitizers": [
      {
        "kind": "length_bound_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352-354",
        "evidence": "MIN(pkcs11_ref.size, sizeof(data)) used to limit copy into small local buffer"
      },
      {
        "kind": "panic_on_overread",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "cur > end triggers TEE_Panic(0) to detect exceeding serial object length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_attribute_head from cur (derived from head) without validating cur+sizeof(header) <= end before reading header->size, enabling malformed sizes to influence next_off.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_attribute_head),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_attribute_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attr_ptr array into caller-supplied attr buffer using size from caller; binding writes pointers into caller memory (alias of &req_attrs in caller).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size (caller-controlled)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads cli_head from cur (refers to serialized client data) without per-entry pre-checks; cli_head.size used to advance len.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into prefix2 using prefix_len+1; destination prefix2 sized by caller must be adequate, otherwise overflow risk exists (no explicit check here).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads attribute header then copies up to MIN(pkcs11_ref.size, sizeof(data)) into local buffer 'data' — copy is bounded by MIN which mitigates overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'head' struct from ref without validating that ref points to a buffer of sufficient length before reading head.attrs_count/attrs_size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre using strlen(prefix) without ensuring pre buffer size; pre originates from caller and may be NULL if not allocated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies a header struct from cur into local pkcs11_ref without validating cur+sizeof(header) <= end first; malformed attrs_size can influence next_off and lead to out-of-bounds behavior.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "high",
    "taint_flow_summary": {
      "source": "head (object attributes buffer) originating from wrapping_key->attributes (TA object storage)",
      "propagation_path": [
        "head -> cur @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "cur -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "pkcs11_ref.size influences next_off and subsequent reads @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      ],
      "sink": "TEE_MemMove reading header from cur into local pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "An attacker-controlled or corrupted object attribute buffer (head) with crafted attrs_size/serialized entries",
        "No earlier validation that cur + sizeof(header) is within bounds"
      ],
      "attack_scenario": "A malformed serialized attributes blob causes TEE_MemMove to read beyond intended region or produce a large pkcs11_ref.size that later advances cur past end, leading to out-of-bounds reads/writes or a panic/denial-of-service.",
      "impact": "Memory-safety violation: out-of-bounds read/write, possible panic/DoS, or memory corruption leading to compromised integrity of TA processing."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (cur + sizeof(pkcs11_attribute_head)) <= end before calling TEE_MemMove and ensure pkcs11_ref.size is reasonable relative to remaining bytes."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size against remaining bytes and impose an upper bound to prevent next_off overflow/underflow."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove from cur into local header uses sizeof(header) without prior per-entry bounds check",
        "Subsequent logic uses header.size to compute offsets (next_off) enabling control over loop iteration"
      ],
      "negative_indicators": [
        "There is a later check (cur > end) that triggers TEE_Panic(0) which detects some overrun conditions but occurs after the read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue (insufficient input validation) is present because the header is read before ensuring enough source bytes remain; this precedence (bounds) takes priority over information-disclosure concerns.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads header from cur without pre-checking that the header fits within head->attrs_size; header.size then used to compute next_off."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "panic_on_overread",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Head is TA-private object attributes (not REE-shared)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "line 119: memory-safety classification suppresses information-disclosure promotion (possible plaintext attribute contents) because bounds/validation issues take precedence"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unchecked read of header struct",
      "Header length field is subsequently trusted"
    ],
    "negative_indicators": [
      "Post-read panic check exists but is too late to prevent the initial unsafe read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The primary issue is weak input validation leading to potential out-of-bounds reads/logic; the unchecked TEE_MemMove of the header is a clear memory-safety flaw requiring bounds checks before the read.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref)+pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "pkcs11_ref.size (from serialized data) is used to compute next_off without validating it against remaining buffer, enabling loop-control manipulation.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Wrapped key bytes (derived from TA-private key material) are written into out_buf which aliases params[2].memref.buffer (REE-visible); out_size derived from params[2].memref.size without an explicit upper-bound check here.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute pointers into caller-supplied buffer using size from caller; improper sizes could overwrite caller memory.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #50: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_parent_attrs_against_processing -> parent_key_complies_allowed_processings -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keycheck_parent_attrs_against_processingparent_key_complies_allowed_processingsget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 104.90秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: attribute buffer (head->attrs_size, cur) potentially influenced by parsed object attributes

シンク: TEE_MemMove at get_attribute_ptrs:119 reading header from cur into stack pkcs11_ref

判定理由: The line performs a fixed-size copy from a buffer pointer 'cur' computed from head and advanced by header-driven sizes, but lacks an immediate pre-copy check that the full header fits within the remaining buffer. This is a direct memory-safety risk (out-of-bounds read) despite existing post-loop panic and other checks, so it is reported as vulnerable.

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: parent_key_complies_allowed_processings
プロンプト 中間 (parent_key_complies_allowed_processings)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “parent_key_complies_allowed_processings” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_parent_attrs_against_processing at lines [2102]:
-- Call #1 at line 2102 --
2100: }
2101:
2102: >>> 	if (!parent_key_complies_allowed_processings(proc_id, head)) {
2103:     		DMSG("Allowed mechanism failed");
2104:     		return PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

1867: static bool parent_key_complies_allowed_processings(uint32_t proc_id,
1868: struct obj_attrs *head)
1869: {
1870: char *attr = NULL;
1871: uint32_t size = 0;
1872: uint32_t proc = 0;
1873: size_t count = 0;
1874: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
1875:
1876: rc = get_attribute_ptr(head, PKCS11_CKA_ALLOWED_MECHANISMS,
1877: (void *)&attr, &size);
1878: if (rc == PKCS11_RV_NOT_FOUND)
1879: return true;
1880: if (rc) {
1881: EMSG("unexpected attributes state");
1882: TEE_Panic(TEE_ERROR_BAD_STATE);
1883: }
1884:
1885: for (count = size / sizeof(uint32_t); count; count--) {
1886: TEE_MemMove(&proc, attr, sizeof(uint32_t));
1887: attr += sizeof(uint32_t);
1888:
1889: if (proc == proc_id)
1890: return true;
1891: }
1892:
1893: DMSG("can't find %s in allowed list", id2str_proc(proc_id));
1894: return false;
1895: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "parent_key_complies_allowed_processings",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"parent_key_complies_allowed_processings",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (parent_key_complies_allowed_processings)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "parent_key_complies_allowed_processings",
    "tainted_vars": [
      "proc_id",
      "head",
      "attr",
      "size",
      "proc",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr, size",
        "rhs": "get_attribute_ptr(head, PKCS11_CKA_ALLOWED_MECHANISMS, &attr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1876-1877"
      },
      {
        "lhs": "count",
        "rhs": "size / sizeof(uint32_t)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1885"
      },
      {
        "lhs": "proc",
        "rhs": "TEE_MemMove(&proc, attr, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1886"
      },
      {
        "lhs": "attr",
        "rhs": "attr + sizeof(uint32_t) (advances through buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1887"
      }
    ],
    "sanitizers": [
      {
        "kind": "absence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1876-1879",
        "evidence": "If get_attribute_ptr returns NOT_FOUND, function returns true (no allowed list) which prevents iteration"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2102,
      "function": "parent_key_complies_allowed_processings",
      "rule": "other",
      "why": "Call-site binding: proc_id argument originates from proc_params->id parsed from REE-provided ctrl buffer (caller-controlled).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "if (!parent_key_complies_allowed_processings(proc_id, head)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2102,
      "function": "parent_key_complies_allowed_processings",
      "rule": "other",
      "why": "Call-site binding: 'head' argument is wrapping_key->attributes (object attributes) — alias of TA-held attributes; origin considered TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!parent_key_complies_allowed_processings(proc_id, head)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1885,
      "function": "parent_key_complies_allowed_processings",
      "rule": "weak_input_validation",
      "why": "Parses allowed mechanism list from attributes and compares entries to proc_id (caller-controlled) using TEE_MemMove; relies on attribute contents and size from get_attribute_ptr without strong validation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "for (count = size / sizeof(uint32_t); count; count--) { TEE_MemMove(&proc, attr, sizeof(uint32_t)); attr += sizeof(uint32_t); if (proc == proc_id) return true; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from parent_key_complies_allowed_processings at lines [1876, 2392, 2654, 2698, 2702, 2706, 2710, 2714, 2798, 2807]:
-- Call #1 at line 1876 --
1874: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
1875:
1876: >>> rc = get_attribute_ptr(head, PKCS11_CKA_ALLOWED_MECHANISMS,
1877: (void *)&attr, &size);
1878: if (rc == PKCS11_RV_NOT_FOUND)
-- Call #2 at line 2392 --
2390: * it which are allowed for an object.
2391: */
2392: >>> if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL,
2393: NULL) == PKCS11_RV_NOT_FOUND)
2394: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
-- Call #3 at line 2654 --
2652: void *value = NULL;
2653:
2654: >>> rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);
2655: if (rc)
2656: return PKCS11_CKR_ARGUMENTS_BAD;
-- Call #4 at line 2698 --
2696: }
2697:
2698: >>> rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);
2699: if (rc)
2700: goto out;
-- Call #5 at line 2702 --
2700: goto out;
2701:
2702: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);
2703: if (rc)
2704: goto out;
-- Call #6 at line 2706 --
2704: goto out;
2705:
2706: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);
2707: if (rc)
2708: goto out;
-- Call #7 at line 2710 --
2708: goto out;
2709:
2710: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);
2711: if (rc)
2712: goto out;
-- Call #8 at line 2714 --
2712: goto out;
2713:
2714: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);
2715: if (rc)
2716: goto out;
-- Call #9 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #10 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159"
      },
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "outputs of get_attribute_ptrs(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158-159"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count == 0 -> NOT_FOUND, count != 1 -> GENERAL_ERROR"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' is a pointer to object attributes passed through; origin can be REE-derived or TEE-held depending on caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'attr_ptr' is an out-parameter that will be set to point into attribute storage (alias of internal buffers); caller may subsequently read it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr_size,src_sz=unknown,dst_sz=ptr_size"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 160,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "Relies on count returned by helper; if helper returns unexpected sizes or multiple entries, function returns GENERAL_ERROR but does not sanitize pointer contents further.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "code_excerpt": "if (!count) return PKCS11_RV_NOT_FOUND; if (count != 1) return PKCS11_CKR_GENERAL_ERROR;"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (when set)",
        "rhs": "cur + sizeof(pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end the code panics (TEE_Panic) preventing further out-of-bounds use"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter is an attribute list pointer whose provenance depends on caller (could be REE-derived or TEE-held).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(struct obj_attrs)+head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' out-parameter will receive pointers into attribute storage (aliases of internal buffers).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr_size,src_sz=unknown,dst_sz=ptr_size"
        ]
      },
      "code_excerpt": "void **attr_ptr = attr;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' out-parameter will be set from parsed attribute headers (may reflect untrusted sizes).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "uint32_t *attr_size_ptr = attr_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' in caller is used to limit returned entries; caller passed initial max and will receive found count.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "size_t max_found = *count;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Parses attribute headers from buffer using pkcs11_ref.size to compute next offset and pointer results; if headers are corrupted/malicious, loop arithmetic may be influenced.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      },
      {
        "lhs": "n",
        "rhs": "requested copy length argument",
        "site": "call-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination &pkcs11_ref is a local stack object written from 'cur' (caller-controlled buffer region).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'cur' points into attribute buffer derived from head->attrs_size; origin may be attacker-influenced if head stems from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header then uses pkcs11_ref.size to compute next_off and pointers; malformed sizes in attributes can influence loop bounds and pointer arithmetic.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from 'cur' which is advanced through an attribute buffer using pkcs11_ref.size-driven arithmetic; there is no explicit check that cur+sizeof(pkcs11_ref) <= end before the copy, permitting an out-of-bounds read if attributes_size is malformed.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "attribute buffer (head->attrs_size, cur) potentially influenced by parsed object attributes",
      "propagation_path": [
        "head (wrapping_key->attributes) -> get_attribute_ptrs: cur = (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "pkcs11_ref.size used to compute next_off -> loop arithmetic influences further reads @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      ],
      "sink": "TEE_MemMove at get_attribute_ptrs:119 reading header from cur into stack pkcs11_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "The attribute buffer length head->attrs_size is malformed or crafted so that cur is near end and remaining bytes < sizeof(pkcs11_ref).",
        "An attacker can influence the contents/size of the attribute buffer referenced by head (depending on object provenance)."
      ],
      "attack_scenario": "An attacker supplies or manipulates attribute storage such that the header copy reads beyond the buffer, causing an out-of-bounds read which may crash the TA or leak adjacent memory depending on runtime behavior.",
      "impact": "Memory-safety violation (out-of-bounds read) that can lead to denial-of-service (TEE_Panic or crash) and potential information disclosure of adjacent TA memory."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure (cur + sizeof(pkcs11_ref)) <= end before calling TEE_MemMove; validate pkcs11_ref.size does not make next_off exceed remaining buffer."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Sanitize pkcs11_ref.size after reading header and before using it to compute next_off; reject obviously invalid sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of fixed sizeof(pkcs11_ref) from cur without explicit check of remaining bytes",
        "Subsequent arithmetic uses pkcs11_ref.size to advance cur, so malformed sizes influence control flow"
      ],
      "negative_indicators": [
        "Loop uses cur < end as primary loop condition and there is a panic if cur > end after loop, providing some protection",
        "Attribute buffers are typically TA-held (wrapping_key->attributes) reducing attacker control in common paths"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The line performs a fixed-size copy from a buffer pointer 'cur' computed from head and advanced by header-driven sizes, but lacks an immediate pre-copy check that the full header fits within the remaining buffer. This is a direct memory-safety risk (out-of-bounds read) despite existing post-loop panic and other checks, so it is reported as vulnerable.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "No explicit pre-copy bound check that (cur + sizeof(pkcs11_ref)) <= end; pkcs11_ref.size used later to compute offsets can be attacker-controlled leading to out-of-bounds read."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { TEE_Panic(0); }"
    },
    {
      "type": "count_limit",
      "location": "get_attribute_ptrs:110-111,140-141",
      "evidence": "max_found = *count and break when found == max_found to limit returned entries"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Often TEE-private object attributes (wrapping_key->attributes) not directly REE-provided",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1262-1268"
    },
    {
      "arg": "attr_ptr / attr_size",
      "why_safe": "Out-parameters set to point into internal buffers; caller usage may be constrained but pointers reflect internal storage",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety issue may enable CRASH or info-leak; because memory-safety takes precedence, potential later information-disclosure classifications (e.g., unencrypted output) are noted but not promoted here."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Exact copy size is sizeof(pkcs11_ref) with no pre-copy bounds check",
      "Subsequent logic uses pkcs11_ref.size for pointer arithmetic"
    ],
    "negative_indicators": [
      "Loop condition cur < end and post-loop panic limit some exploitation",
      "Attribute buffers may be TA-controlled reducing direct REE attacker control in common flows"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety precedence: the TEE_MemMove at line 119 performs an unchecked header copy from a buffer whose remaining size isn't verified before the copy; this permits an out-of-bounds read so the line is classified vulnerable (weak_input_validation).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "pkcs11_ref.size from the copied header is used to compute next_off and advance 'cur' without sanitizing size; malformed sizes can corrupt loop bounds and subsequent pointer math.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes TA-private key_data into REE-visible out_buf using out_size derived from params[2].memref.size; potential overwrite if dst too small or unprotected copy.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #51: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 112.52秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: params (caller-provided memref buffer) -> template -> head (attributes list) derived from REE

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading header from possibly-short buffer

判定理由: The read at line 119 directly uses attacker-controllable buffer length to compute cur/end; cur<end alone does not guarantee sizeof(header) bytes are available, so this is a memory-safety flaw (out-of-bounds read) with high confidence.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2392, 2654, 2698, 2702, 2706, 2710, 2714, 2798, 2807]:
-- Call #1 at line 2392 --
2390: * it which are allowed for an object.
2391: */
2392: >>> if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL,
2393: NULL) == PKCS11_RV_NOT_FOUND)
2394: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
-- Call #2 at line 2654 --
2652: void *value = NULL;
2653:
2654: >>> rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);
2655: if (rc)
2656: return PKCS11_CKR_ARGUMENTS_BAD;
-- Call #3 at line 2698 --
2696: }
2697:
2698: >>> rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);
2699: if (rc)
2700: goto out;
-- Call #4 at line 2702 --
2700: goto out;
2701:
2702: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);
2703: if (rc)
2704: goto out;
-- Call #5 at line 2706 --
2704: goto out;
2705:
2706: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);
2707: if (rc)
2708: goto out;
-- Call #6 at line 2710 --
2708: goto out;
2709:
2710: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);
2711: if (rc)
2712: goto out;
-- Call #7 at line 2714 --
2712: goto out;
2713:
2714: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);
2715: if (rc)
2716: goto out;
-- Call #8 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #9 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 and passed to get_attribute_ptrs",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "populated by get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return value",
        "rhs": "derived from count (0 -> PKCS11_RV_NOT_FOUND, !=1 -> PKCS11_CKR_GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "function enforces that exactly one attribute entry is found (count checks) and returns errors otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2392,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of caller 'head' (attributes list) is consumed by callee; origin of head may be REE-visible (upstream callers pass templates derived from REE)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL, NULL) == PKCS11_RV_NOT_FOUND)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2392,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr out-parameter is alias-bound to caller storage; caller-provided pointer may reference TA or REE memory depending on call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2392,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size out-parameter is alias-bound to caller storage; size originates from parsed attribute and may be attacker-controlled if head is REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "head->attrs_size",
      "cur",
      "end",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "next_off",
      "found",
      "attr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (reads bytes from cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (pkcs11_ref.size derived from data at cur)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "attr_ptr entries / attr_size entries",
        "rhs": "written from cur + sizeof(pkcs11_ref) and pkcs11_ref.size when id matches",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses for (; cur < end; cur += next_off) limiting reads to cur<end"
      },
      {
        "kind": "runtime_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) then TEE_Panic(0) to detect overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 107,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of caller-provided 'head' passed into function; head typically originates from REE-derived template in higher-level callers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute, void **attr, uint32_t *attr_size, size_t *count)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 112,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr (out pointer) is alias-bound to caller storage; caller may supply TA or REE memory so origin is unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "void **attr_ptr = attr;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 113,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size (out pointer) is alias-bound to caller storage; sizes written derive from parsed pkcs11_ref.size which may be attacker-controlled if head is REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "uint32_t *attr_size_ptr = attr_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "reads pkcs11_ref header from cur (derived from head) and uses pkcs11_ref.size to compute next_off and pointer writes without explicit check that sizeof(header)+size <= end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "first parameter passed to TEE_MemMove call-sites (may be TA or caller buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-sites listed>"
      },
      {
        "lhs": "src",
        "rhs": "second parameter passed to TEE_MemMove (often derived from head/cur or caller buffers)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-sites listed>"
      },
      {
        "lhs": "n",
        "rhs": "size argument (sizeof(...), computed sizes, strlen, or MIN(...) expressions) from call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-sites listed>"
      }
    ],
    "sanitizers": [
      {
        "kind": "implicit_runtime_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "caller code checks cur > end and calls TEE_Panic(0) if overflow detected"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from cur (derived from head which may be REE-supplied) into local struct using sizeof(header) without proving that sizeof+payload fits before reading payload size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes to caller-provided attr pointer; attr (destination) origin may be REE or TA depending on caller, so alias binding is uncertain",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads header from cur then copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+header; pkcs11_ref.size is attacker-controlled if cur is REE-derived and header/payload bounds not fully validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=end - (cur+sizeof(pkcs11_ref)),dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies into 'pre' which is set to NULL earlier; destination is invalid leading to memory-safety issue (caller misuse), origin of ref may be REE or TA",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre (pre may be uninitialized/NULL) using strlen(prefix) as length; destination origin/size not validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads sizeof(pkcs11_ref) bytes from cur (derived from head which may be REE-supplied) without proving sizeof(pkcs11_ref) <= end - cur; attacker-controlled head->attrs_size can make src shorter than the read, causing out-of-bounds read.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "params (caller-provided memref buffer) -> template -> head (attributes list) derived from REE",
      "propagation_path": [
        "params->memref.buffer -> serialargs_alloc_get_attributes -> template (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004)",
        "template -> create_attributes_from_template -> head (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1047-1052)",
        "head passed into check_attrs_against_modification/get_attribute_ptrs (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1055 and attributes.c:107)",
        "cur = (char *)head + sizeof(struct obj_attrs); TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-119)"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading header from possibly-short buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or supplies a crafted params->memref.buffer that results in head->attrs_size smaller than sizeof(pkcs11_attribute_head)",
        "No earlier validation ensures sizeof(pkcs11_attribute_head) bytes are available at cur"
      ],
      "attack_scenario": "Malicious client supplies a truncated attributes blob; when the TA calls TEE_MemMove to read the attribute header, it reads past the end of the buffer causing an out-of-bounds read and potential crash or information disclosure.",
      "impact": "Memory-safety violation: out-of-bounds read that may lead to crash, data leakage, or undefined behavior exploitable further."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate that (size_t)(end - cur) >= sizeof(pkcs11_attribute_head) before calling TEE_MemMove; similarly validate sizeof + pkcs11_ref.size <= end before using pkcs11_ref.size to advance."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Sanity-check pkcs11_ref.size for reasonable upper bounds and that sizeof(pkcs11_ref) + pkcs11_ref.size does not wrap/overflow."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur derived from head->attrs_size as src without explicit prior check that sizeof(header) bytes remain",
        "Loop uses cur < end but not sizeof(header) <= end - cur check"
      ],
      "negative_indicators": [
        "There is a runtime panic check later (if cur > end then TEE_Panic) but it occurs after advancing cur and is not a proper pre-read guard"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The read at line 119 directly uses attacker-controllable buffer length to compute cur/end; cur<end alone does not guarantee sizeof(header) bytes are available, so this is a memory-safety flaw (out-of-bounds read) with high confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur without ensuring that many bytes remain in the buffer derived from head (REE-supplied)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-142",
      "evidence": "loop condition for (; cur < end; cur += next_off) limits iterations but does not ensure sizeof(header) bytes are available before read"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe",
      "evidence": "head->attrs_size is used to derive end but individual element size checks are missing before reads (attributes.c:107-121)"
    }
  ],
  "residual_risks": [
    "Line 366 (TEE_MemMove to params[0].memref.buffer) could be information-disclosure if a TA-private sensitive value reaches REE, but memory-safety finding at line 119 takes precedence for crash/leak risk."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct memmove from attacker-influenced buffer without pre-size check",
      "Multiple call-sites build attribute lists from REE-provided data"
    ],
    "negative_indicators": [
      "There is a later panic-on-overflow check (cur > end -> TEE_Panic) but it is insufficient as a precondition guard"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety (out-of-bounds read) is directly supported by code flow and insufficient pre-read checks; this is prioritized over information-disclosure classifications.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Reads attribute header into cli_ref and uses cli_ref.size to compute len without proving header+size <= end.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Header read uses pkcs11_ref.size to advance without prior validation that header+payload fit inside head->attrs_size.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "why": "Copies attribute value to caller-provided buffer; destination origin may be TA or REE and size is derived from parsed data.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #52: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 126.16秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-supplied attribute blob (params -> ctrl->memref.buffer) potentially from REE

シンク: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from untrusted region without sufficient bounds check

判定理由: The code performs an unconditional read of a fixed-size header from a buffer region determined by attacker-influenced metadata without verifying sufficient remaining length; this is a classic out-of-bounds read (CWE-125) and the existing loop condition does not guarantee safety.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2392, 2654, 2698, 2702, 2706, 2710, 2714, 2798, 2807]:
-- Call #1 at line 2392 --
2390: * it which are allowed for an object.
2391: */
2392: >>> if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL,
2393: NULL) == PKCS11_RV_NOT_FOUND)
2394: return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
-- Call #2 at line 2654 --
2652: void *value = NULL;
2653:
2654: >>> rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);
2655: if (rc)
2656: return PKCS11_CKR_ARGUMENTS_BAD;
-- Call #3 at line 2698 --
2696: }
2697:
2698: >>> rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);
2699: if (rc)
2700: goto out;
-- Call #4 at line 2702 --
2700: goto out;
2701:
2702: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);
2703: if (rc)
2704: goto out;
-- Call #5 at line 2706 --
2704: goto out;
2705:
2706: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);
2707: if (rc)
2708: goto out;
-- Call #6 at line 2710 --
2708: goto out;
2709:
2710: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);
2711: if (rc)
2712: goto out;
-- Call #7 at line 2714 --
2712: goto out;
2713:
2714: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);
2715: if (rc)
2716: goto out;
-- Call #8 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #9 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(head, ... , &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-158"
      },
      {
        "lhs": "attr_ptr, attr_size",
        "rhs": "populated by get_attribute_ptrs reading from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2392,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' argument is obj->attributes (TA-private) when invoked from check_attrs_against_modification",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=sizeof(obj->attributes),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(obj->attributes, cli_ref.id, NULL, NULL) == PKCS11_RV_NOT_FOUND)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2654,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' here aliases a template-derived head that originated from REE-supplied ctrl buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2698,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' is template-derived (from caller) and may be REE-influenced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2702,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter from template (caller-supplied) may be REE-visible",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2706,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' argument may contain untrusted attribute sizes/values from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2710,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' used to read private exponent attribute; head may be REE-originated",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2714,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: 'head' used to retrieve public exponent; source is template-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(void *),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2798,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: '*pub_head' passed as head likely TA-managed pub attributes (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2807,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: '*priv_head' passed as head likely TA-managed private attributes (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*count",
        "rhs": "updated to found at end",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop uses cur < end where end derived from head->attrs_size"
      },
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "cur > end triggers TEE_Panic to catch length mismatch"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 107,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases caller-provided attributes structure which may be REE-originated or TA-private depending on caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head->attrs_size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "char *cur = (char *)head + sizeof(struct obj_attrs);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 112,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' output pointer is caller-supplied (may be NULL or point into caller stack/vars)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "void **attr_ptr = attr;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 113,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' output pointer is caller-supplied (may be NULL or point into caller memory)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "uint32_t *attr_size_ptr = attr_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 110,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: '*count' used as max_found; caller-provided count influences loop's early exit",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=*count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "size_t max_found = *count;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref from cur and uses pkcs11_ref.size to compute next_off without validating that pkcs11_ref.size fits within remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "pkcs11_ref",
      "cur",
      "attr",
      "attr_ptr",
      "prefix",
      "prefix2",
      "data",
      "ref",
      "pre"
    ],
    "propagation": [
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from cur (caller-provided buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "attr (dest)",
        "rhs": "TEE_MemMove(attr, attr_ptr, size) writing into caller-provided attr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "data",
        "rhs": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data))) copying from cur-derived region",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352-354"
      },
      {
        "lhs": "head",
        "rhs": "TEE_MemMove(&head, ref, sizeof(head)) reading ref (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads header from cur (derived from head->attrs_size) and uses header.size to compute next offset without validating header.size against remaining bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value into caller-supplied 'attr' pointer; destination origin depends on caller (may be REE-visible) — binding of callee param to caller-provided buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) from cur into local buffer; pkcs11_ref.size is attacker-controlled if head is untrusted and not validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads sizeof(pkcs11_ref) from cur (derived from head and head->attrs_size) using loop condition cur < end but does not ensure cur + sizeof(pkcs11_ref) <= end, enabling an out-of-bounds read when head is attacker-controlled.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-supplied attribute blob (params -> ctrl->memref.buffer) potentially from REE",
      "propagation_path": [
        "params (caller) -> ctrl (entry_copy_object) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1089-1090",
        "ctrl->memref.buffer -> serialargs_alloc_get_attributes -> template/head constructed : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118-1163",
        "head passed to check_attrs_against_modification -> get_attribute_ptrs (head) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1171,2373,107",
        "get_attribute_ptrs uses cur/end derived from head->attrs_size and invokes TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      ],
      "sink": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reading from untrusted region without sufficient bounds check"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed/too-short serialized attribute blob in params/control memref",
        "head->attrs_size is under attacker control or inconsistent with actual buffer contents"
      ],
      "attack_scenario": "An attacker provides a crafted attribute list where head->attrs_size and embedded pkcs11_ref.size cause cur to point near the end such that TEE_MemMove reads past buffer end, causing out-of-bounds read and potential crash or data disclosure.",
      "impact": "Out-of-bounds read can cause TA crash (denial of service) and may leak adjacent memory contents to TA logic; if exploited in combination with other weaknesses, could lead to information disclosure or memory corruption."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate that (end - cur) >= sizeof(pkcs11_ref) before calling TEE_MemMove and verify pkcs11_ref.size fits within remaining bytes before using it to compute next_off."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Check that pkcs11_ref.size is a reasonable value (e.g., does not cause next_off to wrap or exceed end) before using it to advance cur."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145",
        "recommendation": "Avoid calling TEE_Panic; instead return an error when inconsistent lengths are detected earlier."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition uses cur < end but no explicit check for sizeof(header) before read",
        "TEE_MemMove reads fixed sizeof(pkcs11_ref) from cur which may be within last bytes"
      ],
      "negative_indicators": [
        "There is a general loop bound using end = cur + head->attrs_size and a later cur > end panic check, but it does not prevent the initial read of sizeof(pkcs11_ref) when cur is close to end"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The code performs an unconditional read of a fixed-size header from a buffer region determined by attacker-influenced metadata without verifying sufficient remaining length; this is a classic out-of-bounds read (CWE-125) and the existing loop condition does not guarantee safety.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(pkcs11_ref) from cur without ensuring sufficient bytes remain in the buffer."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-116",
      "evidence": "loop uses cur < end where end = (char *)head + sizeof(obj_attrs) + head->attrs_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Not inherently safe; head->attrs_size is used but not fully validated against embedded sizes",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-120"
    }
  ],
  "residual_risks": [
    "line 119: memory-safety finding suppresses any information-disclosure classification here; if exploited to leak TA-private attributes later copied to REE, that would be a separate issue."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of sizeof(pkcs11_ref) in TEE_MemMove without explicit remaining-length check",
      "Multiple call-sites pass potentially REE-originated buffers into these parsing routines"
    ],
    "negative_indicators": [
      "There is a loop bound (cur < end) and a later panic on cur > end, but these do not prevent the immediate unsafe read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedes other classes; the unconditional header read from an attacker-influenced buffer is a high-confidence out-of-bounds read (weak input validation) and thus marked vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Unvalidated read of header from serialized attributes where embedded size fields (pkcs11_ref.size) and remaining buffer length are not adequately checked.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies pkcs11_ref.size bytes from cur into local buffer using MIN but pkcs11_ref.size itself was derived from untrusted data without prior validation.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes obj_handle into caller-provided out->memref.buffer (MEMREF_OUTPUT); not promoted to unencrypted_output since data is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #53: TA_InvokeCommandEntryPoint -> entry_wrap_key -> alloc_key_data_to_wrap -> alloc_copy_attribute_value -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyalloc_key_data_to_wrapalloc_copy_attribute_valueget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 135.28秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: object attributes storage (head->attrs area) — TA-private

シンク: TEE_MemMove call at attributes.c:119 performing read from computed cur

判定理由: The code performs a fixed-size read from a pointer derived from internal metadata without ensuring the full read fits within declared attrs_size. This is a classical out-of-bounds read risk (CWE-125) with strong evidence at the exact call site.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: alloc_key_data_to_wrap
プロンプト 中間 (alloc_key_data_to_wrap)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_key_data_to_wrap” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1256]:
-- Call #1 at line 1256 --
1254: }
1255:
1256: >>> rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz);
1257: if (rc)
1258: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2766: enum pkcs11_rc alloc_key_data_to_wrap(struct obj_attrs *head, void **data,
2767: uint32_t *sz)
2768: { 2769: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 2770: 2771: switch (get_class(head)) { 2772: case PKCS11_CKO_SECRET_KEY: 2773: rc = alloc_copy_attribute_value(head, data, sz); 2774: break; 2775: case PKCS11_CKO_PRIVATE_KEY: 2776: if (get_key_type(head) == PKCS11_CKK_RSA) 2777: rc = encode_rsa_private_key_der(head, data, sz); 2778: break; 2779: default: 2780: break; 2781: } 2782: 2783: return rc; 2784: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_key_data_to_wrap", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_key_data_to_wrap", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_key_data_to_wrap)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_key_data_to_wrap",
    "tainted_vars": [
      "head",
      "data",
      "sz",
      "rc",
      "key class result",
      "key_data",
      "key_sz"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "switch(get_class(head)) -> alloc_copy_attribute_value / encode_rsa_private_key_der",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2769-2778"
      },
      {
        "lhs": "key_data, key_sz",
        "rhs": "alloc_copy_attribute_value(head, data, sz) or encode_rsa_private_key_der(head, data, sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2772-2777"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1256,
      "function": "alloc_key_data_to_wrap",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases key->attributes from TA object (origin TA-private attributes).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1256,
      "function": "alloc_key_data_to_wrap",
      "rule": "other",
      "why": "Call-site binding: callee 'data' parameter is &key_data (TA-private out pointer) passed by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1256,
      "function": "alloc_key_data_to_wrap",
      "rule": "other",
      "why": "Call-site binding: callee 'sz' parameter is &key_sz (TA-private size out parameter) from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_key_data_to_wrap(key->attributes, &key_data, &key_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2772,
      "function": "alloc_key_data_to_wrap",
      "rule": "other",
      "why": "Produces key_data/key_sz from key attributes (secret material) which will later be used for wrapping; sensitive TA-private data is allocated/encoded here.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_copy_attribute_value(head, data, sz) / rc = encode_rsa_private_key_der(head, data, sz);"
    }
  ]
}

関数: alloc_copy_attribute_value
プロンプト 中間 (alloc_copy_attribute_value)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_copy_attribute_value” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_key_data_to_wrap at lines [2773]:
-- Call #1 at line 2773 --
2771:     	switch (get_class(head)) {
2772:     	case PKCS11_CKO_SECRET_KEY:
2773: >>> 		rc = alloc_copy_attribute_value(head, data, sz);
2774:     		break;
2775:     	case PKCS11_CKO_PRIVATE_KEY:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2647: static enum pkcs11_rc alloc_copy_attribute_value(struct obj_attrs *head,
2648: void **data, uint32_t *sz)
2649: {
2650: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
2651: void *buffer = NULL;
2652: void *value = NULL;
2653:
2654: rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);
2655: if (rc)
2656: return PKCS11_CKR_ARGUMENTS_BAD;
2657:
2658: buffer = TEE_Malloc(*sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);
2659: if (!buffer)
2660: return PKCS11_CKR_DEVICE_MEMORY;
2661:
2662: TEE_MemMove(buffer, value, *sz);
2663: *data = buffer;
2664:
2665: return PKCS11_CKR_OK;
2666: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_copy_attribute_value",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"alloc_copy_attribute_value",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (alloc_copy_attribute_value)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_copy_attribute_value",
    "tainted_vars": [
      "head",
      "data",
      "sz",
      "value",
      "buffer",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "value",
        "rhs": "get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz) -> value from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2654-2656"
      },
      {
        "lhs": "buffer",
        "rhs": "TEE_Malloc(*sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2658-2660"
      },
      {
        "lhs": "*data",
        "rhs": "buffer (allocated) assigned after copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2662-2664"
      }
    ],
    "sanitizers": [
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2655-2656",
        "evidence": "if (rc) return PKCS11_CKR_ARGUMENTS_BAD after get_attribute_ptr"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2658-2660",
        "evidence": "if (!buffer) return PKCS11_CKR_DEVICE_MEMORY after TEE_Malloc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2773,
      "function": "alloc_copy_attribute_value",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attribute head (origin TA-private key attributes).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_copy_attribute_value(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2773,
      "function": "alloc_copy_attribute_value",
      "rule": "other",
      "why": "Call-site binding: callee 'data' parameter is &key_data (TA-private out pointer) passed by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_copy_attribute_value(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2773,
      "function": "alloc_copy_attribute_value",
      "rule": "other",
      "why": "Call-site binding: callee 'sz' parameter is &key_sz (TA-private size out parameter) from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_copy_attribute_value(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "alloc_copy_attribute_value",
      "rule": "other",
      "why": "Copies attribute value (likely TA-private secret) into freshly TEE_Malloc'd buffer using *sz; source sensitivity is secret and buffer is TA-private.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_copy_attribute_value at lines [2654, 2698, 2702, 2706, 2710, 2714, 2798, 2807]:
-- Call #1 at line 2654 --
2652: void *value = NULL;
2653:
2654: >>> rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);
2655: if (rc)
2656: return PKCS11_CKR_ARGUMENTS_BAD;
-- Call #2 at line 2698 --
2696: }
2697:
2698: >>> rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);
2699: if (rc)
2700: goto out;
-- Call #3 at line 2702 --
2700: goto out;
2701:
2702: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);
2703: if (rc)
2704: goto out;
-- Call #4 at line 2706 --
2704: goto out;
2705:
2706: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);
2707: if (rc)
2708: goto out;
-- Call #5 at line 2710 --
2708: goto out;
2709:
2710: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);
2711: if (rc)
2712: goto out;
-- Call #6 at line 2714 --
2712: goto out;
2713:
2714: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);
2715: if (rc)
2716: goto out;
-- Call #7 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #8 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count",
      "returned value (via attr_ptr)"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count) -> attr_ptr set to pointer(s) found in head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "attr_size",
        "rhs": "get_attribute_ptrs(...,&attr_size,...) -> attr_size set from attribute metadata in head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "Checks that count != 0 and count == 1, otherwise returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2654,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'head' parameter aliases caller-provided attribute head (origin TA-private key attributes).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2654,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_ptr' parameter is &value (caller local) and will be set to point into head's storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2654,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter is sz (caller-provided out size) and receives attribute length from head.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Function forwards pointers from internal storage to caller (attr_ptr/attr_size), exposing TA-private attribute pointers and sizes to caller code.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=pointer/size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) -- bytes read from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (size derived from attribute header)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*count",
        "rhs": "found (incremented when pkcs11_ref.id == attribute)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:125-126,150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "Loop condition uses cur<end to limit reads; next_off computed and loop advances cur by next_off"
      },
      {
        "kind": "panic_on_overrun",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end after loop, code calls TEE_Panic(0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'head' is pointer to object attributes (TA-private storage) passed in from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr' parameter aliases caller buffer(s) (attr_ptr) which will be populated with pointers into head's storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=pointer,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: callee 'attr_size' parameter is caller-provided out size array that will receive attribute lengths from head.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=4*count,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads attribute headers and uses pkcs11_ref.size to advance cur (next_off) without explicit check that cur+sizeof(pkcs11_ref) and cur+next_off are within bounds before the TEE_MemMove, risking out-of-bounds read if attrs_size is inconsistent.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "bytes copied from src of length len",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "len",
        "rhs": "call-site literal/variable (e.g., sizeof(pkcs11_ref) or computed size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination &pkcs11_ref is a local TA stack buffer (receives bytes copied by TEE_MemMove).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'cur' points into head->attrs storage (TA-private) and is read by TEE_MemMove.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(pkcs11_ref) from cur without an explicit pre-check that cur+sizeof(pkcs11_ref) is <= end on the exact read site.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' (caller buffer) may be populated from attr_ptr data; origins depend on caller (populated pointers into head).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) from cur (derived from head + offsets) without an explicit pre-check that cur+sizeof(pkcs11_ref) <= end, allowing an out-of-bounds read if head->attrs_size or pkcs11_ref.size are inconsistent.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "object attributes storage (head->attrs area) — TA-private",
      "propagation_path": [
        "head -> cur computed as (char*)head + sizeof(struct obj_attrs) @ attributes.c:107",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads header from cur @ attributes.c:119",
        "pkcs11_ref.size used to advance next_off and to index into attribute payloads @ attributes.c:120-121",
        "returned pointer(s) from get_attribute_ptrs propagate to get_attribute_ptr -> alloc_copy_attribute_value -> alloc_key_data_to_wrap -> entry_wrap_key and later written to out_buf"
      ],
      "sink": "TEE_MemMove call at attributes.c:119 performing read from computed cur"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A crafted or corrupted object with inconsistent head->attrs_size or malformed attribute headers stored in TA-private storage is present",
        "No additional validation ensuring cur+sizeof(header) <= end before the MemMove at line 119"
      ],
      "attack_scenario": "Malformed or corrupted attrs_size or earlier metadata causes TEE_MemMove to read past the end of the attributes buffer, potentially leaking adjacent memory or causing crash/undefined behavior.",
      "impact": "Out-of-bounds read leading to information disclosure of adjacent TA memory, crash, or control-flow compromise depending on downstream use."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that (cur + sizeof(pkcs11_ref)) <= end and that (cur + next_off) <= end before performing TEE_MemMove and advancing cur."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Replace blind TEE_MemMove with a guarded copy that checks remaining buffer length and returns an error if insufficient."
      },
      {
        "type": "type_validation",
        "location": "attributes parsing",
        "recommendation": "Sanity-check pkcs11_ref.size for reasonable limits (e.g., not exceeding attrs_size) before use."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of cur and sizeof(pkcs11_ref) at the MemMove site without a prior exact-bounds check",
        "subsequent use of pkcs11_ref.size to compute next_off which is influenced by read header"
      ],
      "negative_indicators": [
        "Loop has cur < end guard which partially constrains reads",
        "There is a later panic on cur > end, indicating some overrun detection albeit post-read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The code performs a fixed-size read from a pointer derived from internal metadata without ensuring the full read fits within declared attrs_size. This is a classical out-of-bounds read risk (CWE-125) with strong evidence at the exact call site.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(pkcs11_ref) from cur without verifying cur+sizeof(pkcs11_ref) <= end."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "Loop condition cur < end limits iterations but does not guarantee cur+sizeof(pkcs11_ref) <= end before the read"
    },
    {
      "type": "panic_on_overrun",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "If cur > end after loop the code calls TEE_Panic(0) which detects overrun post-read"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Contains attrs_size used to bound iteration, providing partial protection",
      "evidence": "attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure classification at this site; however, downstream copies (e.g., writing key_data to REE buffers) remain potential disclosure vectors."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unguarded fixed-size read from computed pointer",
      "pkcs11_ref.size influences indexing after the read"
    ],
    "negative_indicators": [
      "Loop guard cur < end offers partial protection",
      "panic on cur > end is reactive, not preventive"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety weakness (possible out-of-bounds read) at the TEE_MemMove call is the primary issue; existing loop guard and panic are insufficient to guarantee safety before the read.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads attribute header and uses header.size to advance without explicit pre-read bounds check; can cause out-of-bounds read.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "alloc_copy_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=*sz"
        ]
      },
      "why": "Copies attribute VALUE into allocated buffer using size from get_attribute_ptr without additional validation; upstream header corruption could influence size.",
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Wrapped key bytes (sensitive) are written into REE-visible params[2].memref.buffer; insufficient explicit bound checks on out_buf against params[2].memref.size may allow overwrite or disclosure.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #54: TA_InvokeCommandEntryPoint -> entry_wrap_key -> alloc_key_data_to_wrap -> encode_rsa_private_key_der -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyalloc_key_data_to_wrapencode_rsa_private_key_derget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 147.78秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE‑125

深刻度: MEDIUM

テイントフロー:

ソース: object attribute storage (head + offset) containing pkcs11 attribute entries

シンク: TEE_MemMove reading header and subsequent loop advancement leading to out-of-bounds memory access

判定理由: The code copies a header from object memory then immediately trusts a length field from that header to advance parsing without validating it against remaining buffer bounds, creating a clear out-of-bounds read/iteration vector.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: encode_rsa_private_key_der
プロンプト 中間 (encode_rsa_private_key_der)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “encode_rsa_private_key_der” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_key_data_to_wrap at lines [2777]:
-- Call #1 at line 2777 --
2775: case PKCS11_CKO_PRIVATE_KEY:
2776: if (get_key_type(head) == PKCS11_CKK_RSA)
2777: >>> rc = encode_rsa_private_key_der(head, data, sz);
2778: break;
2779: default:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

2669: encode_rsa_private_key_der(struct obj_attrs *head, void **data, uint32_t *sz)
2670: { 2671: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 2672: int i = 0; 2673: int mbedtls_rc = 0; 2674: int start = 0; 2675: int der_size = 0; 2676: void *n = NULL; 2677: void *p = NULL; 2678: void *q = NULL; 2679: void *d = NULL; 2680: void *e = NULL; 2681: uint32_t n_len = 0; 2682: uint32_t p_len = 0; 2683: uint32_t q_len = 0; 2684: uint32_t d_len = 0; 2685: uint32_t e_len = 0; 2686: uint8_t *buffer = NULL; 2687: mbedtls_pk_context pk = { }; 2688: mbedtls_rsa_context *rsa = NULL; 2689: const mbedtls_pk_info_t *pk_info = NULL; 2690: 2691: mbedtls_pk_init(&pk); 2692: pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_RSA); 2693: if (mbedtls_pk_setup(&pk, pk_info)) { 2694: rc = PKCS11_CKR_GENERAL_ERROR; 2695: goto out; 2696: } 2697: 2698: rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len); 2699: if (rc) 2700: goto out; 2701: 2702: rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len); 2703: if (rc) 2704: goto out; 2705: 2706: rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len); 2707: if (rc) 2708: goto out; 2709: 2710: rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len); 2711: if (rc) 2712: goto out; 2713: 2714: rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len); 2715: if (rc) 2716: goto out; 2717: 2718: rsa = mbedtls_pk_rsa(pk); 2719: mbedtls_rc = mbedtls_rsa_import_raw(rsa, n, n_len, p, p_len, 2720: q, q_len, d, d_len, e, e_len); 2721: if (mbedtls_rc) { 2722: rc = PKCS11_CKR_ARGUMENTS_BAD; 2723: goto out; 2724: } 2725: 2726: if (mbedtls_rsa_complete(rsa)) { 2727: rc = PKCS11_CKR_ARGUMENTS_BAD; 2728: goto out; 2729: } 2730: 2731: if (mbedtls_rsa_check_privkey(rsa)) { 2732: rc = PKCS11_CKR_ARGUMENTS_BAD; 2733: goto out; 2734: } 2735: 2736: der_size = n_len * 8; 2737: buffer = TEE_Malloc(der_size, TEE_USER_MEM_HINT_NO_FILL_ZERO); 2738: if (!buffer) { 2739: rc = PKCS11_CKR_DEVICE_MEMORY; 2740: goto out; 2741: } 2742: 2743: mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size); 2744: if (mbedtls_rc < 0) { 2745: rc = PKCS11_CKR_ARGUMENTS_BAD; 2746: goto out; 2747: } 2748: 2749: start = der_size - mbedtls_rc; 2750: for (i = 0; i < mbedtls_rc; i++) { 2751: buffer[i] = buffer[i + start]; 2752: buffer[i + start] = 0; 2753: } 2754: 2755: *data = buffer; 2756: *sz = mbedtls_rc; 2757: out: 2758: mbedtls_pk_free(&pk); 2759: 2760: if (rc) 2761: TEE_Free(buffer); 2762: 2763: return rc; 2764: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "encode_rsa_private_key_der", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"encode_rsa_private_key_der", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (encode_rsa_private_key_der)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "encode_rsa_private_key_der",
    "tainted_vars": [
      "head",
      "data",
      "sz",
      "n",
      "p",
      "q",
      "d",
      "e",
      "n_len",
      "p_len",
      "q_len",
      "d_len",
      "e_len",
      "buffer",
      "der_size",
      "mbedtls_rc"
    ],
    "propagation": [
      {
        "lhs": "n, p, q, d, e",
        "rhs": "get_attribute_ptr(head, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2698-2715"
      },
      {
        "lhs": "rsa",
        "rhs": "mbedtls_pk_rsa(pk) and mbedtls_rsa_import_raw(... n,p,q,d,e ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2718-2721"
      },
      {
        "lhs": "der_size",
        "rhs": "n_len * 8",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2736"
      },
      {
        "lhs": "buffer",
        "rhs": "TEE_Malloc(der_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2737-2741"
      },
      {
        "lhs": "mbedtls_rc",
        "rhs": "mbedtls_pk_write_key_der(&pk, buffer, der_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743-2747"
      },
      {
        "lhs": "*data, *sz",
        "rhs": "buffer, mbedtls_rc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2755-2756"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2692-2696",
        "evidence": "mbedtls_pk_setup(&pk, pk_info) checked and returns on error"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2698-2715",
        "evidence": "Each get_attribute_ptr checked and function returns on rc"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2726-2734",
        "evidence": "mbedtls_rsa_complete / check_privkey checked and returns on error"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2737-2741",
        "evidence": "checks buffer != NULL and returns PKCS11_CKR_DEVICE_MEMORY on failure"
      },
      {
        "kind": "call_return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743-2747",
        "evidence": "mbedtls_pk_write_key_der return checked (<0 -> error)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/alloc_key_data_to_wrap (call-site)",
      "line": 2777,
      "function": "encode_rsa_private_key_der",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases key->attributes (TA-private object attributes containing private key parts).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = encode_rsa_private_key_der(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/alloc_key_data_to_wrap (call-site)",
      "line": 2777,
      "function": "encode_rsa_private_key_der",
      "rule": "other",
      "why": "Call-site binding: 'data' parameter is &key_data (TA-private out pointer) provided by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = encode_rsa_private_key_der(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/alloc_key_data_to_wrap (call-site)",
      "line": 2777,
      "function": "encode_rsa_private_key_der",
      "rule": "other",
      "why": "Call-site binding: 'sz' parameter is &key_sz (TA-private size out parameter) from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = encode_rsa_private_key_der(head, data, sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2736,
      "function": "encode_rsa_private_key_der",
      "rule": "other",
      "why": "Allocates buffer with TEE_Malloc to hold sensitive private-key DER; returns it via *data/*sz making TA-private secret available to caller.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "code_excerpt": "buffer = TEE_Malloc(der_size, ...); *data = buffer; *sz = mbedtls_rc;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2750,
      "function": "encode_rsa_private_key_der",
      "rule": "other",
      "why": "Per-byte in-place copy loop moves DER bytes to front of buffer and zeroes tail; operates on TA-private buffer containing secret—ensure loop bounds match mbedtls_rc.",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "code_excerpt": "for (i = 0; i < mbedtls_rc; i++) { buffer[i] = buffer[i + start]; buffer[i + start] = 0; }"
    }
  ]
}

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from encode_rsa_private_key_der at lines [2698, 2702, 2706, 2710, 2714, 2798, 2807]:
-- Call #1 at line 2698 --
2696: }
2697:
2698: >>> rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);
2699: if (rc)
2700: goto out;
-- Call #2 at line 2702 --
2700: goto out;
2701:
2702: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);
2703: if (rc)
2704: goto out;
-- Call #3 at line 2706 --
2704: goto out;
2705:
2706: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);
2707: if (rc)
2708: goto out;
-- Call #4 at line 2710 --
2708: goto out;
2709:
2710: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);
2711: if (rc)
2712: goto out;
-- Call #5 at line 2714 --
2712: goto out;
2713:
2714: >>> rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);
2715: if (rc)
2716: goto out;
-- Call #6 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #7 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return rc",
        "rhs": "count checks (if !count -> NOT_FOUND; if count != 1 -> GENERAL_ERROR)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "count_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-164",
        "evidence": "returns NOT_FOUND if count==0 and GENERAL_ERROR if count!=1"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2698,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases local pointer 'n' in caller (holds private-key modulus) which is TA-private secret.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_MODULUS, &n, &n_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2702,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases local pointer 'p' in caller (private prime) which is TA-private secret.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_1, &p, &p_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2706,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases local pointer 'q' in caller (private prime) which is TA-private secret.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIME_2, &q, &q_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2710,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases local pointer 'd' in caller (private exponent) which is TA-private secret.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PRIVATE_EXPONENT, &d, &d_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2714,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases local pointer 'e' in caller (public exponent) but still sourced from object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, PKCS11_CKA_PUBLIC_EXPONENT, &e, &e_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2798,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases id1 pointer in caller (object ID) originating from object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2807,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "Call-site binding: attr_ptr output aliases id2 pointer in caller (object ID) originating from object attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "pkcs11_ref.size",
      "found"
    ],
    "propagation": [
      {
        "lhs": "cur, end",
        "rhs": "(char *)head + sizeof(struct obj_attrs) ; cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size (from TEE_MemMove read)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "found, attr_ptr, attr_size_ptr",
        "rhs": "matching attribute entries update when pkcs11_ref.id == attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-139"
      },
      {
        "lhs": "*count",
        "rhs": "found (written at function end)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'head' aliases object attribute storage (TA-private object memory) passed by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attribute' is caller-provided selector (scalar) controlling matching; treated as TA-provided input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr' output pointers alias caller-provided buffers (will point into head) — potential leak of TA-private attribute pointers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'attr_size' output aliases caller size slots (populated from pkcs11_ref.size) derived from object memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Call-site binding: 'count' parameter aliases caller's count variable (initially 1) controlling max_found; caller-supplied bound influences behavior.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=sizeof(size_t),dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads pkcs11_ref from object memory and uses pkcs11_ref.size to advance cur (next_off) without explicit upper-limit on pkcs11_ref.size, risking out-of-bounds if attrs_size is corrupted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "n",
        "rhs": "size argument passed to TEE_MemMove (sizeof(pkcs11_ref) or computed lengths)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "cur > end check leads to TEE_Panic to prevent overruns"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&pkcs11_ref' is a caller stack buffer (TA-private) receiving data copied from object memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'cur' points into object attribute storage (head+offset) which is TA-private memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (read from src) to compute next_off without constraining pkcs11_ref.size against remaining attrs_size; a corrupted size can cause out-of-bounds reads.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Reads pkcs11_ref header from object storage and then uses pkcs11_ref.size to compute next_off without constraining it against remaining attrs_size, enabling out-of-bounds reads/advances.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "object attribute storage (head + offset) containing pkcs11 attribute entries",
      "propagation_path": [
        "head.attrs storage -> cur pointer arithmetic @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119",
        "next_off computed from pkcs11_ref.size and used to advance cur -> potential out-of-bounds loop iteration"
      ],
      "sink": "TEE_MemMove reading header and subsequent loop advancement leading to out-of-bounds memory access"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A corrupted or malicious pkcs11 object attrs_size or pkcs11_ref.size present in object storage",
        "Attacker can influence or supply malformed object attribute data (e.g., via previously stored object)"
      ],
      "attack_scenario": "Crafted attribute blob with pkcs11_ref.size large or attrs_size inconsistent causes next_off to advance past end, leading to out-of-bounds reads or TEE_Panic (denial-of-service) or memory disclosure depending on subsequent code paths.",
      "impact": "Memory-safety violation: potential out-of-bounds read/advance leading to crash/DoS or reading unintended memory (information disclosure)."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:119-121",
        "recommendation": "Validate pkcs11_ref.size against remaining bytes (end - cur - sizeof(pkcs11_ref)) before using it to compute next_off; reject entries with inconsistent sizes."
      },
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure loop increments cannot cause cur to exceed end and handle malformed sizes safely without looping or panic."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of pkcs11_ref.size (read from untrusted object memory) to compute next_off immediately after TEE_MemMove",
        "No explicit check of pkcs11_ref.size against remaining attrs_size prior to use"
      ],
      "negative_indicators": [
        "There is a later cur > end check that triggers TEE_Panic which mitigates silent memory corruption but results in DoS"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The code copies a header from object memory then immediately trusts a length field from that header to advance parsing without validating it against remaining buffer bounds, creating a clear out-of-bounds read/iteration vector.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads pkcs11_ref and pkcs11_ref.size is used unchecked to compute next_off causing potential out-of-bounds advancement."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Points to TA object storage (not REE), but content may be malformed; not inherently safe",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses information-disclosure labeling here, but elsewhere the wrapped key (TA-private secret) is later written into REE-visible params[2] (wrap_data_by_symm_enc at processing.c:1266) — potential unencrypted_output risk at that later site."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unchecked use of size field from parsed header",
      "Lack of pre-use range validation"
    ],
    "negative_indicators": [
      "There is a panic-based check after loop end which may abort on corruption"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the immediate risk is an out-of-bounds advancement/read due to trusting pkcs11_ref.size; this is a clear weak input validation vulnerability with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Reads header then uses header.size to compute next_off without validating size against remaining attrs_size.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2750,
      "function": "encode_rsa_private_key_der",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "why": "Per-byte in-place copy moves DER bytes to front of buffer and zeroes tail; ensure loop bounds match mbedtls_rc to avoid buffer issues.",
      "code_excerpt": "for (i = 0; i < mbedtls_rc; i++) { buffer[i] = buffer[i + start]; buffer[i + start] = 0; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) using out_size derived from params[2].memref.size without an effective upper bound check; TA-private secret is written to shared memory.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #55: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> add_missing_attribute_id -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairadd_missing_attribute_idget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 133.84秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: caller-provided serialized object buffer (head->attrs) potentially originating from REE

シンク: TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur into local pkcs11_ref (attributes.c:119)

判定理由: Memory-safety precedence: evidence shows a fixed-size copy from a pointer derived from external buffer with insufficient pre-copy bounds checks, which is a clear OOB-read risk (CWE-125).

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_missing_attribute_id at lines [2798, 2807]:
-- Call #1 at line 2798 --
2796: assert(priv_head);
2797:
2798: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);
2799: if (rc) { 2800: if (rc != PKCS11_RV_NOT_FOUND) -- Call #2 at line 2807 -- 2805: }
2806:
2807: >>> rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);
2808:     	if (rc) {
2809:     		if (rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "1 (initialization)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156"
      },
      {
        "lhs": "attr_ptr,attr_size,count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return value",
        "rhs": "based on count (0 -> NOT_FOUND, !=1 -> GENERAL_ERROR, else OK)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2798,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of *pub_head passed from caller into get_attribute_ptr; origin from templates that may contain REE-derived data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2798,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr (address of id1) from caller passed for writing; callee may populate pointer to data possibly backed by shared buffers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_write,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_ID, &id1, &id1_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 2807,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of *priv_head passed from caller into get_attribute_ptr; origin from templates that may contain REE-derived data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*priv_head, PKCS11_CKA_ID, &id2, &id2_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptr",
      "rule": "weak_input_validation",
      "why": "get_attribute_ptrs writes to attr_ptr/attr_size/count without local validation of resulting sizes or provenance",
      "sink_function": "get_attribute_ptrs",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref",
      "found",
      "attr_ptr",
      "attr_size_ptr"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr (written)",
        "rhs": "cur + sizeof(pkcs11_ref) (pointer into head's buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:131-134"
      },
      {
        "lhs": "*attr_size_ptr (written)",
        "rhs": "pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:137-138"
      },
      {
        "lhs": "*count",
        "rhs": "found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "loop condition uses cur < end to limit parsing; final check cur > end triggers panic"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of head passed from caller into callee; head may reference buffers originating from REE/shared memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of attr (attr_ptr) argument from caller passed for writing; callee writes pointers into this buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_writes,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of attr_size argument from caller passed for writing sizes; callee writes pkcs11_ref.size into it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of count pointer passed from caller; callee updates count with number of matches",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "parsing uses pkcs11_ref.size from buffer to compute next_off and pointer targets without validating size bounds or provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "assigns pointers into head buffer (possibly shared) into caller-provided attr array without verifying that resulting pointers are safe or canonical",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_write,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (e.g., cur, ref, prefix)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "n",
        "rhs": "size argument (e.g., sizeof(pkcs11_ref), pkcs11_ref.size, strlen(prefix))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-121",
        "evidence": "loop uses cur < end to limit reads; final check panics if cur > end"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from buffer at cur using size from code; pkcs11_ref.size later used to compute offsets without validating that size is sane or provenance of cur",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute pointers/content from attr_ptr into caller-provided attr destination; origin of attr_ptr may be derived from parsed buffers",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies client-supplied attribute header from ref location into local cli_head; used length cli_head.size influences subsequent parsing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from ref_attr into pkcs11_ref and then trusts pkcs11_ref.size for further operations without extra validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from ref_attr into pkcs11_ref and then uses its id/size for a lookup without validating ref_attr provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 using prefix_len derived elsewhere; origin of prefix may be caller-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies small sample bytes from attribute value into local buffer using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size originates from parsed header",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies struct head from ref into local head and then indexes head.attrs_count; ref provenance not validated here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre (buffer) for logging; length uses strlen(prefix) which relies on prefix being NUL-terminated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur into local pkcs11_ref where cur is derived from head buffer; loop only checks cur < end (not cur + sizeof(pkcs11_ref) <= end), so a malformed/short attrs_size can make the copy read past end causing memory-safety issues.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "caller-provided serialized object buffer (head->attrs) potentially originating from REE",
      "propagation_path": [
        "params (REE) -> pub_template/priv_template -> obj_attrs head (processing.c:448-462)",
        "head passed into get_attribute_ptrs(head, ...) (attributes.c:158)",
        "cur = (char*)head + sizeof(struct obj_attrs); cur used as src in TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (attributes.c:107-119)"
      ],
      "sink": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur into local pkcs11_ref (attributes.c:119)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed serialized object buffer provided to TA (head->attrs_size smaller than claimed)",
        "No validation ensuring space for header before copying"
      ],
      "attack_scenario": "Supply a crafted attrs blob where end - cur < sizeof(pkcs11_ref); TEE_MemMove will read past buffer bounds, potentially causing panic or memory disclosure/corruption depending on runtime behavior.",
      "impact": "Memory-safety violation: possible OOB read leading to crash (TEE_Panic) or disclosure of adjacent memory; could lead to denial-of-service or information disclosure."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that cur + sizeof(pkcs11_attribute_head) <= end before calling TEE_MemMove; similarly validate pkcs11_ref.size before using it to compute next_off and pointer targets."
      },
      {
        "type": "type_validation",
        "location": "callers that construct head:unknown",
        "recommendation": "Validate attrs_size provenance and enforce maximum reasonable size for serialized objects before parsing."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Loop condition uses cur < end but does not check cur + sizeof(pkcs11_ref) <= end before the fixed-size copy.",
        "Final check panics only if cur > end (post-loop) rather than preventing the header copy."
      ],
      "negative_indicators": [
        "There is a general loop bound based on head->attrs_size (cur < end) which limits parsing in typical correct inputs."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety precedence: evidence shows a fixed-size copy from a pointer derived from external buffer with insufficient pre-copy bounds checks, which is a clear OOB-read risk (CWE-125).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) executes without ensuring cur + sizeof(pkcs11_ref) <= end; pkcs11_ref.size later used to compute offsets, compounding risk."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "loop condition cur < end limits parsing; final check cur > end triggers panic"
    },
    {
      "type": "type_validation",
      "location": "get_attribute_ptrs:150",
      "evidence": "*count = found; caller checks count"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated by loop boundary using head->attrs_size",
      "evidence": "get_attribute_ptrs:107-108"
    },
    {
      "arg": "attr_ptr/attr_size",
      "why_safe": "written only when space permits according to max_found, but their contents (pkcs11_ref.size) are not fully validated",
      "evidence": "get_attribute_ptrs:110-139"
    }
  ],
  "residual_risks": [
    "Line 366 in TA_InvokeCommandEntryPoint copies rc to params[0].memref.buffer (TEE_MemMove) but is not promoted to unencrypted_output; memory-safety finding at line 119 may suppress information-disclosure analysis for some flows."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy from cur without pre-copy bounds check",
      "Subsequent use of pkcs11_ref.size to compute offsets and pointer targets"
    ],
    "negative_indicators": [
      "Loop bound cur < end provides some protection for well-formed inputs"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Marked vulnerable due to a provable pattern: fixed-size read from untrusted-derived buffer without verifying sufficient remaining length, yielding an OOB-read (CWE-125).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 130,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pointer_write,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "why": "Assigns pointers into parsed head buffer into caller-provided attr array without validating that resulting pointers are within bounds or originate from safe memory.",
      "code_excerpt": "*attr_ptr++ = cur + sizeof(pkcs11_ref);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (shared/REE-visible); handles are non-sensitive but destination is shared.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2825,
      "function": "add_missing_attribute_id",
      "sink_function": "set_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id1_size,src_sz=id1_size,dst_sz=unknown"
        ]
      },
      "why": "set_attribute called with id pointer and id_size obtained from get_attribute_ptr without additional validation of provenance or size limits.",
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    }
  ]
}
フロー #56: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> tee2pkcs_rsa_attributes -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keystee2pkcs_rsa_attributesget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 116.68秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided serialized object buffer (params -> templates -> head->attrs buffer) originating from REE

シンク: TEE_MemMove reads header bytes from cur into local pkcs11_ref without ensuring the header fits within head->attrs_size (out-of-bounds read)

判定理由: The MemMove at line 119 reads a fixed header size from a pointer computed from a REE-supplied buffer without verifying the header fits within the buffer bounds; this is a clear out-of-bounds read risk (CWE-125) despite downstream checks.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_rsa_attributes at lines [624, 703, 710]:
-- Call #1 at line 624 --
622: goto out;
623:
624: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr,
625: NULL);
626: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
-- Call #2 at line 703 --
701: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
702:
703: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr,
704: &a_size);
705: if (rc != PKCS11_CKR_OK || a_size != sizeof(uint32_t))
-- Call #3 at line 710 --
708: TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));
709:
710: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr,
711: &a_size);
712: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: { 156: size_t count = 1; 157: 158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count); 159: 160: if (!count) 161: return PKCS11_RV_NOT_FOUND; 162: 163: if (count != 1) 164: return PKCS11_CKR_GENERAL_ERROR; 165: 166: return PKCS11_CKR_OK; 167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptr", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptr", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      },
      {
        "lhs": "attr_ptr,attr_size",
        "rhs": "populated by get_attribute_ptrs(...) (indirect)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      },
      {
        "lhs": "return value rc",
        "rhs": "derived from count checks (0 -> NOT_FOUND, !=1 -> GENERAL_ERROR, else OK)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count and returns explicit error codes for 0 or !=1 which bounds multiplicity"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "alias of *pub_head (object attributes structure) passed as head; origin may be from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr out-parameter is bound to caller pointer (a_ptr) which may alias into template buffers derived from REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size out-parameter is bound to caller a_size pointer; its value influences subsequent sized copy into modulus_bits",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur,end",
        "rhs": "(char*)head + sizeof(struct obj_attrs) and cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size after TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-121"
      },
      {
        "lhs": "found, *count",
        "rhs": "incremented when pkcs11_ref.id == attribute and finally stored back to *count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:122-151"
      },
      {
        "lhs": "attr (out) and attr_size (out)",
        "rhs": "written from cur+sizeof(pkcs11_ref) and pkcs11_ref.size respectively when matches found",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "Checks if cur > end and panics to prevent processing beyond buffer"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of head argument (object attributes buffer) passed from caller; head may be constructed from REE-provided template data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr out-parameter (attr) is bound to caller pointer and will receive pointers into head's buffer (shared-derived), creating aliases into potentially REE-origin memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size out-parameter bound to caller pointer; its value influences sized operations elsewhere (e.g., TEE_MemMove into locals)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "count in/out parameter is updated with number of matches found and returned to caller; caller logic depends on this value for subsequent checks",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Parses length-prefixed attributes using pkcs11_ref.size from buffer; if pkcs11_ref.size is attacker-controlled it may cause next_off or cur arithmetic to overflow/skip checks leading to panic/out-of-bounds",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "call-site destination argument (varies by call)",
        "site": "attributes.c:119,187,220,352,353,435,447"
      },
      {
        "lhs": "src",
        "rhs": "call-site source argument (varies by call, often pointers into attribute buffers 'cur' or refs)",
        "site": "attributes.c:119,187,220,352,353,435,447"
      },
      {
        "lhs": "n",
        "rhs": "call-site length argument (sizeof(...) or runtime size/min/strlen etc.)",
        "site": "attributes.c:119,187,220,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "caller checks cur <= end and panics if cur > end to prevent over-read in some loops"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from 'cur' (pointer into attribute buffer possibly derived from REE) into local pkcs11_ref struct; src is REE-derived so could be attacker-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload pointers/bytes from attr_ptr into attr buffer provided by caller; attr_ptr may alias into REE-derived buffers",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies client-provided attribute header bytes into local cli_head from cur; src is parsed buffer and could be attacker-controlled",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from attribute payload into a small local buffer 'data' using MIN(pkcs11_ref.size, sizeof(data)); pkcs11_ref.size influences copy length",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serial object head from 'ref' into local head structure; source may be untrusted buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into 'pre' buffer; source 'prefix' provenance unclear (possibly REE), and length uses strlen(prefix) without explicit dst size here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur (pointer into REE-derived attribute buffer) without a prior bounds check that cur+sizeof(pkcs11_ref) <= end; attacker-controlled sizes in the buffer can cause out-of-bounds read/over-read.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided serialized object buffer (params -> templates -> head->attrs buffer) originating from REE",
      "propagation_path": [
        "params (REE) -> pub_template/priv_template constructed in entry_generate_key_pair @ processing.c:425-431",
        "pub_head/priv_head (obj_attrs) populated from templates -> passed into generate_rsa_keys @ processing.c:519",
        "pub_head passed into get_attribute_ptrs via get_attribute_ptr -> get_attribute_ptrs(head, ...) @ attributes.c:156-158",
        "cur pointer computed from head and used as source for TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119"
      ],
      "sink": "TEE_MemMove reads header bytes from cur into local pkcs11_ref without ensuring the header fits within head->attrs_size (out-of-bounds read)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or can influence the serialized object buffer provided in params (REE-origin).",
        "head->attrs_size or embedded pkcs11_ref.size fields are crafted to make cur+sizeof(pkcs11_ref) exceed end or to manipulate loop arithmetic."
      ],
      "attack_scenario": "A malicious REE client supplies a crafted serialized attributes buffer that causes get_attribute_ptrs to read beyond the buffer via TEE_MemMove, leading to crash or disclosure of adjacent memory in the TEE process.",
      "impact": "Information disclosure of adjacent memory or denial-of-service (panic/crash) in the Trusted Application; possible corruption of control flow if exploited in combination with other flaws."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Ensure cur + sizeof(pkcs11_ref) <= end before calling TEE_MemMove; validate head->attrs_size and pkcs11_ref.size against remaining buffer space."
      },
      {
        "type": "type_validation|range_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Validate pkcs11_ref.size for reasonable limits and check for arithmetic overflows when computing next_off."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of REE-derived buffer pointer 'cur' as source to TEE_MemMove at line 119",
        "No explicit pre-copy bounds check for cur+sizeof(pkcs11_ref) before the MemMove"
      ],
      "negative_indicators": [
        "There is a later check cur > end with panic which partly protects the loop, but it occurs after the copy and thus is insufficient for this read"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The MemMove at line 119 reads a fixed header size from a pointer computed from a REE-supplied buffer without verifying the header fits within the buffer bounds; this is a clear out-of-bounds read risk (CWE-125) despite downstream checks.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads pkcs11_attribute_head from cur without ensuring enough bytes remain in the attribute buffer, allowing out-of-bounds read."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    },
    {
      "type": "type_validation",
      "location": "get_attribute_ptr:160-166",
      "evidence": "count checks in get_attribute_ptr that enforce multiplicity"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "Partially validated elsewhere (attrs_size used), but not sufficiently checked before header read",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses treating the same copy as an information-disclosure (unencrypted_output) on that line because memory-safety is prioritized."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed-size read from REE-derived pointer without pre-check",
      "Subsequent code depends on sizes from parsed headers that an attacker can control"
    ],
    "negative_indicators": [
      "There is an after-the-fact check that panics if cur > end, but it does not prevent the initial read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety issue (out-of-bounds read) is present at the sink site due to lack of a pre-copy bounds check; this yields high-confidence vulnerability (CWE-125) and must be fixed by adding explicit checks before the MemMove.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Loop computes next_off from pkcs11_ref.size (attacker-controlled) to advance cur; without robust range checks this can lead to mis-parsing, over-reads, or infinite loops.",
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    }
  ]
}
フロー #57: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keysget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 128.59秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Serialized object buffer (head->attrs region) likely derived from REE-controlled templates

シンク: TEE_MemMove reading header from cur (attributes.c:119)

判定理由: The code performs an unconditional fixed-size read from a pointer computed from head and head->attrs_size; the loop condition cur < end does not guarantee sizeof(pkcs11_ref) bytes are available, enabling out-of-bounds read (memory-safety issue) which takes precedence over information-disclosure classification.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_rsa_keys at lines [703, 710]:
-- Call #1 at line 703 --
701: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
702:
703: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr,
704: &a_size);
705: if (rc != PKCS11_CKR_OK || a_size != sizeof(uint32_t))
-- Call #2 at line 710 --
708: TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));
709:
710: >>> rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr,
711: &a_size);
712: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: { 156: size_t count = 1; 157: 158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count); 159: 160: if (!count) 161: return PKCS11_RV_NOT_FOUND; 162: 163: if (count != 1) 164: return PKCS11_CKR_GENERAL_ERROR; 165: 166: return PKCS11_CKR_OK; 167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptr", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptr", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "initialized to 1 then passed to get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:156-159"
      },
      {
        "lhs": "attr_ptr,attr_size",
        "rhs": "outputs of get_attribute_ptrs(...) populated from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "Checks count == 0 -> NOT_FOUND; count != 1 -> GENERAL_ERROR; otherwise OK"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "head argument aliases *pub_head from caller (origin may be template built from REE data)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr output bound to local a_ptr (TEE-private) via &a_ptr",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 703,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size output bound to local a_size (TEE-private) via &a_size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 710,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "head argument aliases *pub_head from caller (same origin as previous call)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 710,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_ptr output bound to local a_ptr (TEE-private) via &a_ptr for public exponent retrieval",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 710,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "attr_size output bound to local a_size (TEE-private) via &a_size for public exponent retrieval",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr, &a_size);"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size after TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119-120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "derived from cur and pkcs11_ref.size when matching attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:115-142",
        "evidence": "Loop ensures cur < end and updates cur by next_off; breaks when found == max_found"
      },
      {
        "kind": "panic_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "If cur > end then TEE_Panic(0) to stop on detected overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "alias of head passed from caller (*pub_head) which may originate from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr (attr_ptr) is an output pointer provided by caller; function writes pointers derived from shared buffer into it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size is an output provided by caller; function writes attribute sizes derived from head into it",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "count is an in/out parameter controlling how many matches are returned and is modified based on parsed data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "Reads pkcs11_attribute_head from cur using TEE_MemMove; cur is derived from head->attrs_size and may be attacker-controlled leading to malformed sizes/next_off",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "written from src via TEE_MemMove(dst, src, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from cur (derived from head, potentially REE-supplied) into local pkcs11_ref on stack; source provenance uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Writes into attr (caller-provided output pointer) data from attr_ptr (derived from parsed object), binding caller outputs to parsed buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from cur into local cli_head; cur originates from serialized buffer possibly from REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from ref_attr into local pkcs11_ref; ref_attr provenance may be attacker-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from ref_attr into local pkcs11_ref before further parsing; source region uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes from prefix (unknown origin) into prefix2 buffer then writes padding; source size used in copy is prefix_len+1",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads attribute header into pkcs11_ref and then copies up to sizeof(data) bytes from following payload into local data[]; payload length is attacker-controlled via pkcs11_ref.size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head from ref into local head; ref likely points into serialized object buffer whose provenance is upstream",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer prior to logging; prefix provenance uncertain and length uses strlen(prefix)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove reads sizeof(pkcs11_ref) bytes from cur derived from head/attrs_size without ensuring cur + sizeof(pkcs11_ref) <= end, allowing out-of-bounds read from attacker-controlled buffer.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Serialized object buffer (head->attrs region) likely derived from REE-controlled templates",
      "propagation_path": [
        "params (REE) -> pub_template / priv_template (processing.c:425-431,448-462)",
        "pub_head/priv_head created from templates -> get_attribute_ptrs called via get_attribute_ptr (attributes.c:158)",
        "get_attribute_ptrs parses buffer and calls TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) (attributes.c:119)"
      ],
      "sink": "TEE_MemMove reading header from cur (attributes.c:119)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted serialized object/template such that head->attrs_size and internal offsets position cur near end",
        "No upstream validation prevents malformed attrs_size or internal sizes"
      ],
      "attack_scenario": "Attacker-controlled serialized attributes cause get_attribute_ptrs to MemMove past buffer end, leading to out-of-bounds read and potential crash or memory disclosure depending on surrounding memory layout.",
      "impact": "Information disclosure or denial-of-service (panic/crash); possible memory corruption depending on subsequent use of read data."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Ensure end - cur >= sizeof(pkcs11_attribute_head) before calling TEE_MemMove; validate next_off computed from pkcs11_ref.size does not cause wrap/overflow."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Validate pkcs11_ref.size against remaining buffer and impose sane limits to prevent large next_off values."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-148",
        "recommendation": "Avoid relying on post-loop panic; perform pre-copy checks to prevent out-of-bounds reads."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct MemMove of fixed sizeof(pkcs11_ref) from cur with only cur < end loop condition",
        "Post-loop overflow check exists but does not prevent the initial read"
      ],
      "negative_indicators": [
        "Loop checks cur < end and later panics if cur > end, indicating some defensive code (but too late)",
        "No explicit proof of attacker-controlled head in this function alone (origin tracked across calls)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The code performs an unconditional fixed-size read from a pointer computed from head and head->attrs_size; the loop condition cur < end does not guarantee sizeof(pkcs11_ref) bytes are available, enabling out-of-bounds read (memory-safety issue) which takes precedence over information-disclosure classification.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads sizeof(pkcs11_ref) from cur without ensuring sufficient remaining bytes, allowing OOB read."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "panic_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe",
      "evidence": "head->attrs_size used to compute end but not sufficient to guarantee pre-copy length check (attributes.c:107-108,115-121)"
    }
  ],
  "residual_risks": [
    "Line 119 prioritized as memory-safety (weak_input_validation); information-disclosure (unencrypted_output) not promoted here though parsed data later flows to outputs."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size MemMove from potentially attacker-controlled buffer",
      "Insufficient pre-copy bounds checks"
    ],
    "negative_indicators": [
      "Post-loop panic exists but is too late to prevent initial read"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety weakness (out-of-bounds read) is evident at the MemMove site; this is prioritized and classified as weak_input_validation with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Parsing loop uses sizes from serialized attributes (possibly REE-controlled) to derive next offsets; malformed sizes may drive out-of-bounds reads or large jumps.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "generate_rsa_keys",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=a_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Copies attribute bytes into local modulus_bits after get_attribute_ptr; relies on get_attribute_ptr to have validated size.",
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out buffer (shared); structural risk of exposing handles though not classified as sensitive here.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #58: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keysget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 109.26秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: REE-provided object template bytes (params -> pub_template/pub_head)

シンク: TEE_MemMove reading into local pkcs11_ref from potentially out-of-bounds cur

判定理由: TEE_MemMove at line 119 reads a fixed header size from a pointer computed from attacker-controllable serialized data and then uses the read size to advance the pointer; no prior per-iteration bounds check ensures the copy is within the remaining buffer, leading to out-of-bounds read/panic; memory-safety risk takes precedence over information-disclosure.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_ec_keys at lines [614, 749]:
-- Call #1 at line 614 --
612: }
613:
614: >>> if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS,
615: &a_ptr, &a_size) || !a_ptr) { 616: EMSG("No EC_PARAMS attribute found in public key"); -- Call #2 at line 749 -- 747: }
748:
749: >>> if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS,
750:     			      &a_ptr, &a_size) || !a_ptr) {
751:     		EMSG("No EC_PARAMS attribute found in public key");

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks that count != 0 and count == 1, returning errors otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 614,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller passes pub_head (derived from templates populated from REE data) as head; callee will dereference and return pointers potentially into REE-derived memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=pub_head->attrs_size,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size) || !a_ptr) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 614,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller supplies &a_ptr as attr_ptr; callee writes out pointer potentially aliasing REE-origin memory into caller variable.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 614,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller supplies &a_size as attr_size; callee writes size derived from attribute metadata which may be attacker-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=pub_head->attrs_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size)"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "max_found",
      "found",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*count",
        "rhs": "found (number of matching attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:150"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } -- detects overflow past end but results in panic"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 614,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller passes *pub_head (from REE-populated template) as head; callee will index into head->attrs (shared/REE-derived).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=pub_head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 614,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller supplies &a_ptr as attr parameter; callee writes pointers that may alias into REE-origin memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Reads attribute header from cur (derived from head + offset) with TEE_MemMove using attacker-controlled offsets/size; pkcs11_ref.size then drives next_off without validation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "Uses pkcs11_ref.size (from untrusted data) to compute next_off for loop advancement without validating that next_off keeps cur within bounds.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size + sizeof(pkcs11_ref),dst_sz=end - cur"
        ]
      },
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "multiple call sites (attributes.c:119,187,220,265,298,344,352,353,435,447)"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "multiple call sites (attributes.c:119,187,220,265,298,344,352,353,435,447)"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided size parameter (often derived from attribute metadata or strlen/min)",
        "site": "multiple call sites (attributes.c:119,187,220,265,298,344,352,353,435,447)"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw copy; callers must ensure bounds/validity (some callers perform checks, others rely on sizes)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from cur (derived from head+offset where head.attrs_size is attacker-influenced) into pkcs11_ref using len sizeof(pkcs11_ref) while next_off is computed from untrusted pkcs11_ref.size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies attribute value pointer data from attr_ptr into attr buffer using size from caller; source/size may be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre (caller-provided buffer) using strlen(prefix) without explicit dst bounds here; destination origin at call-site determines risk.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur where cur is computed from head + offset and next_off is driven by pkcs11_ref.size (untrusted): this can advance cur past end and cause out-of-bounds reads/panic; callers originate head from REE-populated templates.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "REE-provided object template bytes (params -> pub_template/pub_head)",
      "propagation_path": [
        "params (REE) -> pub_template/pub_head @ processing.c:425-456",
        "pub_head (REE-derived) passed into generate_ec_keys -> get_attribute_ptrs via get_attribute_ptr @ processing_ec.c:614 / processing.c:516",
        "get_attribute_ptrs reads header at cur computed from head + sizeof(struct obj_attrs) and uses pkcs11_ref.size to compute next_off @ attributes.c:107-121",
        "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads from untrusted-controlled location @ attributes.c:119 (sink)"
      ],
      "sink": "TEE_MemMove reading into local pkcs11_ref from potentially out-of-bounds cur"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker can control the serialized object bytes supplied via params/templates",
        "Malformed pkcs11_ref.size such that next_off causes cur to point beyond end (or len insufficient) before the copy"
      ],
      "attack_scenario": "Provide a crafted attribute blob where pkcs11_ref.size is large or malformed so that TEE_MemMove reads beyond the intended buffer; this may trigger TA panic (TEE_Panic) or memory-corruption depending on environment.",
      "impact": "Denial of service via TA panic; potential memory-corruption leading to undefined behavior depending on platform (high severity)"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:115-121",
        "recommendation": "Validate that cur + sizeof(pkcs11_ref) <= end before calling TEE_MemMove and validate pkcs11_ref.size to ensure next_off does not advance beyond end."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120",
        "recommendation": "Check pkcs11_ref.size for reasonable maximums and that sizeof(pkcs11_ref)+pkcs11_ref.size does not overflow or exceed remaining buffer."
      },
      {
        "type": "mem_access_check",
        "location": "get_attribute_ptrs:145-150",
        "recommendation": "Avoid panic on simple bounds violation; return an error instead of TEE_Panic to prevent DoS and allow callers to handle malformed input."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of untrusted pkcs11_ref.size to compute next_off (attributes.c:120)",
        "TEE_MemMove reads header from cur without prior per-iteration bounds check (attributes.c:119)",
        "Later check panics if cur > end, indicating potential overflow scenario (attributes.c:145-148)"
      ],
      "negative_indicators": [
        "Loop condition uses cur < end which can prevent some overruns but next_off is computed from untrusted data",
        "There is a global check after the loop that panics on overflow (detection but too late)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "TEE_MemMove at line 119 reads a fixed header size from a pointer computed from attacker-controllable serialized data and then uses the read size to advance the pointer; no prior per-iteration bounds check ensures the copy is within the remaining buffer, leading to out-of-bounds read/panic; memory-safety risk takes precedence over information-disclosure.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Read of fixed header from cur without confirming cur+sizeof(header) <= end; pkcs11_ref.size (untrusted) then used to compute next_off enabling overflow/panic."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:145-148",
      "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "not safe",
      "evidence": "head->attrs_size is used to compute end but per-iteration reads rely on untrusted pkcs11_ref.size (attributes.c:107-121)"
    }
  ],
  "residual_risks": [
    "line 119: memory-safety classification prevents promotion to unencrypted_output despite key material possibly being handled later"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct, local evidence of untrusted size usage and lack of per-copy bounds check"
    ],
    "negative_indicators": [
      "Post-loop panic exists (detection), not a mitigation for exploitation"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety issue is explicit: untrusted length drives loop advancement and an unchecked TEE_MemMove reads a fixed-size header from that pointer. This can lead to out-of-bounds reads and TA panic; thus the line is vulnerable under weak input validation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 120,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=pkcs11_ref.size + sizeof(pkcs11_ref),dst_sz=end - cur"
        ]
      },
      "why": "Uses pkcs11_ref.size (from untrusted input) to compute next_off without validating it keeps cur within bounds, enabling overflow/panic.",
      "code_excerpt": "next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 653,
      "function": "generate_ec_keys",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=tee_size,src_sz=tee_size,dst_sz=pub_head->attrs_size+priv_head->attrs_size"
        ]
      },
      "why": "tee2pkcs_ec_attributes extracts key material from tee_obj into pub_head/priv_head; handling secret key bytes in TA-managed structures is sensitive and must be protected from leaking to REE.",
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but writing into shared memory is structural risk to track.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #59: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_eddsa_keys -> get_attribute_ptr -> get_attribute_ptrs -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_eddsa_keysget_attribute_ptrget_attribute_ptrsTEE_MemMove

実行時間: 113.48秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: params-derived serialized object buffer (REE-visible) passed through obj_attrs->head

シンク: TEE_MemMove copies header from potentially truncated/controlled cur location into TA stack

判定理由: Memory-safety issue (out-of-bounds read) is present because a fixed-size copy is performed from an untrusted-derived pointer without verifying sufficient remaining source bytes; memory-safety precedence applied.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: get_attribute_ptr
プロンプト 中間 (get_attribute_ptr)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptr” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_eddsa_keys at lines [749]:
-- Call #1 at line 749 --
747: }
748:
749: >>> if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS,
750:     			      &a_ptr, &a_size) || !a_ptr) {
751:     		EMSG("No EC_PARAMS attribute found in public key");

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

153: enum pkcs11_rc get_attribute_ptr(struct obj_attrs *head, uint32_t attribute,
154: void **attr_ptr, uint32_t *attr_size)
155: {
156: size_t count = 1;
157:
158: get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)
161: return PKCS11_RV_NOT_FOUND;
162:
163: if (count != 1)
164: return PKCS11_CKR_GENERAL_ERROR;
165:
166: return PKCS11_CKR_OK;
167: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"get_attribute_ptr",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (get_attribute_ptr)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptr",
    "tainted_vars": [
      "head",
      "attribute",
      "attr_ptr",
      "attr_size",
      "count"
    ],
    "propagation": [
      {
        "lhs": "attr_ptr, attr_size, count",
        "rhs": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:158"
      }
    ],
    "sanitizers": [
      {
        "kind": "value_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:160-166",
        "evidence": "checks that count != 0 and count == 1, returning errors otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 749,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided head pointer (*pub_head) flows into helper; origin region unclear (could be TA-managed or derived from REE), so binding surfaced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size) || !a_ptr) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 749,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided attr_ptr address (&a_ptr) passed into helper; binding of out-parameter to callee observed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size) || !a_ptr) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 749,
      "function": "get_attribute_ptr",
      "rule": "other",
      "why": "caller-provided attr_size address (&a_size) passed into helper; binding of out-parameter to callee observed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (get_attribute_ptr(*pub_head, PKCS11_CKA_EC_PARAMS, &a_ptr, &a_size) || !a_ptr) {"
    }
  ]
}

関数: get_attribute_ptrs
プロンプト 中間 (get_attribute_ptrs)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_attribute_ptrs” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptr at lines [158]:
-- Call #1 at line 158 --
156: size_t count = 1;
157:
158: >>> get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);
159:
160: if (!count)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

104: void get_attribute_ptrs(struct obj_attrs *head, uint32_t attribute,
105: void **attr, uint32_t *attr_size, size_t *count)
106: { 107: char *cur = (char *)head + sizeof(struct obj_attrs); 108: char *end = cur + head->attrs_size; 109: size_t next_off = 0; 110: size_t max_found = *count; 111: size_t found = 0; 112: void **attr_ptr = attr; 113: uint32_t *attr_size_ptr = attr_size; 114: 115: for (; cur < end; cur += next_off) { 116: 117: struct pkcs11_attribute_head pkcs11_ref = { }; 118: 119: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)); 120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; 121: 122: if (pkcs11_ref.id != attribute) 123: continue; 124: 125: found++; 126: 127: if (!max_found) 128: continue; 129: 130: if (attr) { 131: if (pkcs11_ref.size) 132: *attr_ptr++ = cur + sizeof(pkcs11_ref); 133: else 134: *attr_ptr++ = NULL; 135: } 136: 137: if (attr_size) 138: *attr_size_ptr++ = pkcs11_ref.size; 139: 140: if (found == max_found) 141: break; 142: } 143: 144: 145: if (cur > end) { 146: DMSG("Exceeding serial object length"); 147: TEE_Panic(0); 148: } 149: 150: *count = found; 151: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_attribute_ptrs", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_attribute_ptrs", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_attribute_ptrs)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_attribute_ptrs",
    "tainted_vars": [
      "head",
      "attribute",
      "attr",
      "attr_size",
      "count",
      "cur",
      "end",
      "next_off",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "cur",
        "rhs": "(char *)head + sizeof(struct obj_attrs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:107"
      },
      {
        "lhs": "end",
        "rhs": "cur + head->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:108"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119"
      },
      {
        "lhs": "next_off",
        "rhs": "sizeof(pkcs11_ref) + pkcs11_ref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:120"
      },
      {
        "lhs": "*attr_ptr / *attr_size_ptr",
        "rhs": "cur + sizeof(pkcs11_ref) / pkcs11_ref.size when matching attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:130-138"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:145-148",
        "evidence": "if (cur > end) { DMSG(...); TEE_Panic(0); } - detects exceeding serial object length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "caller-provided head pointer passed into helper; origin at call-site may be REE-derived (shared memref), so binding surfaced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr output pointer (attr) passed into helper as destination for found attribute addresses; binding of out-parameter observed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "attr_size output pointer passed into helper; binding of out-parameter observed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 158,
      "function": "get_attribute_ptrs",
      "rule": "other",
      "why": "count pointer (&count) passed into helper to receive number of matches; binding of out-parameter observed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "get_attribute_ptrs(head, attribute, attr_ptr, attr_size, &count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "rule": "weak_input_validation",
      "why": "loop advances by next_off derived from pkcs11_ref.size (input-controlled) without per-iteration validation against end until final check, enabling crafted attrs_size/size to cause mis-iteration",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute_ptrs at lines [119, 187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 119 --
117: struct pkcs11_attribute_head pkcs11_ref = { };
118:
119: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120: next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:
-- Call #2 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #3 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #4 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #5 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #6 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #7 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #8 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #9 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #10 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 119:
114:
115:     	for (; cur < end; cur += next_off) {
116:     
117:     		struct pkcs11_attribute_head pkcs11_ref = { };
118:     
119: >>> 		TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
120:     		next_off = sizeof(pkcs11_ref) + pkcs11_ref.size;
121:     
122:     		if (pkcs11_ref.id != attribute)
123:     			continue;
124:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copy of n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:119,187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 119,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header from cur (possibly REE-derived shared buffer) into stack struct pkcs11_ref, binding shared src into TA-private destination",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute data to attr (output array) from attr_ptr; binding of potential TA/REE sources into attr destination",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies client-provided header from cur into cli_head on stack; cur may be from shared buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header from ref_attr into local pkcs11_ref; src may be REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header into local pkcs11_ref before resolving value; source may be untrusted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies logging prefix into prefix2 from prefix (likely TA or REE); potential read from external buffer into local buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header into pkcs11_ref from cur; cur may be from serialized object (untrusted), influencing subsequent size calculations",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized attribute into small local array 'data' - size is attacker-controlled leading to potential info flow or truncation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head structure from ref into local head; source may be serialized external data, binding untrusted src into TA-local struct",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer for logging; src may be external and length determined by strlen(prefix) without explicit dst bounds here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [119]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [119] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      119
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 119,
      "function": "get_attribute_ptrs",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from cur without validating that cur+sizeof(pkcs11_ref) <= end; next_off and pkcs11_ref.size are derived from untrusted data, enabling out-of-bounds read via this MemMove.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "params-derived serialized object buffer (REE-visible) passed through obj_attrs->head",
      "propagation_path": [
        "params (TEE_Param memref) -> head (obj_attrs) @ processing.c:394-396",
        "head->attrs_size used to set end; cur initialized from head @ attributes.c:107-108",
        "cur (untrusted pointer into serialized buffer) -> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) @ attributes.c:119"
      ],
      "sink": "TEE_MemMove copies header from potentially truncated/controlled cur location into TA stack"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A caller (REE) supplies a serialized object in params that makes head->attrs_size small or crafted",
        "Serialized data causes cur to point near or beyond end such that sizeof(pkcs11_ref) bytes are not fully available"
      ],
      "attack_scenario": "A malicious REE client crafts a serialized attributes blob where pkcs11_ref.size or attrs_size cause the loop to position cur close to end; the MemMove then reads beyond the buffer, causing out-of-bounds read or panic, potentially leaking memory or triggering OOB behavior.",
      "impact": "Out-of-bounds read leading to potential information disclosure or TA crash (TEE_Panic from subsequent check)."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute_ptrs:119",
        "recommendation": "Verify (cur + sizeof(pkcs11_ref)) <= end before invoking TEE_MemMove; validate pkcs11_ref.size before using to advance cur."
      },
      {
        "type": "range_check",
        "location": "get_attribute_ptrs:120-121",
        "recommendation": "Ensure next_off is non-zero and within a sane bound (e.g., does not exceed remaining bytes) before using it to advance the loop."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct MemMove from untrusted cur pointer without explicit per-copy upper bound check",
        "next_off computed from pkcs11_ref.size (untrusted) controls iteration and can cause mispositioning"
      ],
      "negative_indicators": [
        "Loop condition (cur < end) and final check (if cur > end) exist, which may limit some exploitation",
        "Code panics when cur > end, potentially preventing silent data leakage in some cases"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety issue (out-of-bounds read) is present because a fixed-size copy is performed from an untrusted-derived pointer without verifying sufficient remaining source bytes; memory-safety precedence applied.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 119,
        "function": "get_attribute_ptrs",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref)) reads fixed header size from cur without ensuring cur+sizeof(header) <= end; cur and pkcs11_ref.size originate from untrusted serialized data."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute_ptrs:115-121",
      "evidence": "for (; cur < end; cur += next_off) { ... } and later if (cur > end) { DMSG(...); TEE_Panic(0); }"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "caller performs template/size checks upstream but head->attrs_size originates from serialized data and is not fully constrained: processing.c:448-462 and attributes.c:107-108"
    }
  ],
  "residual_risks": [
    "Line 119 memory-safety finding suppresses direct 'unencrypted_output' promotion, but if pkcs11_ref contents are later copied to REE-visible outputs they could cause info disclosure."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size MemMove from untrusted pointer",
      "Computation of next_off from untrusted pkcs11_ref.size"
    ],
    "negative_indicators": [
      "Loop condition and final cur> end check exist and may abort on clear overrun"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Marked vulnerable due to clear potential for out-of-bounds read: a fixed-size copy is performed from an untrusted-derived pointer without an explicit per-copy bounds check; mitigations should add an immediate check before the MemMove.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 115,
      "function": "get_attribute_ptrs",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=next_off,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Loop advances by next_off computed from untrusted pkcs11_ref.size without validating each advancement against end, enabling mis-iteration or overshoot.",
      "code_excerpt": "for (; cur < end; cur += next_off) { ... next_off = sizeof(pkcs11_ref) + pkcs11_ref.size; }"
    }
  ]
}
フロー #60: TA_InvokeCommandEntryPoint -> entry_wrap_key -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyget_boolget_attributeTEE_MemMove

実行時間: 46.82秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Bounds check on attr_size prevents copying more bytes than caller buffer; copy is TA-internal and not written to REE, so no overflow or information disclosure at this sink.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer (argument)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (argument, e.g., attr_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided size argument (argument 'size')",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy primitive; callers must ensure bounds and validity"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer 'attr' via TEE_MemMove; if pointers or size are tainted/misreported this can overwrite destination.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' aliases caller buffer (&bbool) provided by get_attribute caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr and is used as copy source.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller-supplied attr_size (initialized to sizeof(bbool)=1) is checked against required size and function returns PKCS11_CKR_BUFFER_TOO_SMALL before copying; copy is between TA-private regions, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attribute storage (attr_ptr) from get_attribute_ptr",
      "propagation_path": [
        "get_attribute_ptr -> get_attribute: attr_ptr, size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "get_attribute -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187",
        "get_attribute called by get_bool with &bbool, size=sizeof(bbool) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-239"
      ],
      "sink": "TEE_MemMove into caller buffer (&bbool) at line 187"
    },
    "exploitation_analysis": {
      "preconditions": [
        "get_attribute_ptr returns a size <= provided attr_size (or else copy avoided)",
        "no corruption of attr_size prior to check"
      ],
      "attack_scenario": "If attr_size were incorrectly set smaller and check bypassed, a too-large size could cause overwrite; in current code attr_size is initialized and checked, preventing this.",
      "impact": "Potential memory corruption if check missing; current code prevents overflow, impact limited to assertion or error returns."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "attributes.c:244",
        "recommendation": "Avoid assert(rc == PKCS11_CKR_OK); handle unexpected rc values gracefully to prevent TA crash"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute: if (*attr_size < size) return BUFFER_TOO_SMALL",
        "attr_size in get_bool is initialized to sizeof(bbool)=1 before call"
      ],
      "negative_indicators": [
        "get_attribute_ptr implementation not shown here (attr_ptr provenance and size computation assumed correct)",
        "assert(rc == PKCS11_CKR_OK) in get_bool could abort on unexpected rc"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Bounds check on attr_size prevents copying more bytes than caller buffer; copy is TA-internal and not written to REE, so no overflow or information disclosure at this sink.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A size/bounds check prevents the copy when the provided buffer is too small and the data is copied only into a TA-local buffer.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "null_check",
      "location": "get_attribute:186-188",
      "evidence": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr_size (caller: get_bool 'size')",
      "why_safe": "Initialized to sizeof(bbool) and used in explicit bounds check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241"
    },
    {
      "arg": "attr (caller: &bbool)",
      "why_safe": "Small fixed stack buffer with caller-provided size checked before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-187"
    }
  ],
  "residual_risks": [
    "line 187: assertion on unexpected rc in get_bool (rc asserted == OK) may crash TA instead of graceful handling"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit pre-copy bounds check",
      "attr_size initialized to exact destination buffer size"
    ],
    "negative_indicators": [
      "Relies on get_attribute_ptr correctness (not inspected here)",
      "Assert in caller could abort on unexpected error"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: bounds checks prevent overflow at TEE_MemMove( ... , size) and the data stays TA-private; thus no vulnerable sink at line 187.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 244,
      "function": "get_bool",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "why": "get_bool uses assert(rc == PKCS11_CKR_OK) for unexpected error codes which may abort the TA instead of graceful error handling.",
      "code_excerpt": "assert(rc == PKCS11_CKR_OK);"
    }
  ]
}
フロー #61: TA_InvokeCommandEntryPoint -> entry_wrap_key -> set_processing_state -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyset_processing_stateget_boolget_attributeTEE_MemMove

実行時間: 70.66秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The explicit attr_size check at lines 180-184 ensures copies only occur when the caller buffer is large enough, preventing overflow at the sink line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (attr_ptr/cur/ref/prefix/etc.)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220,265,298,344,352-353,435,447"
      },
      {
        "lhs": "n",
        "rhs": "size argument (caller-controlled size or computed MIN/...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187,344-354"
      }
    ],
    "sanitizers": [
      {
        "kind": "caller_bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller may update attr_size and return BUFFER_TOO_SMALL before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller stack buffer 'attr' (both TA-private); size determined by 'size'.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from 'cur' into local cli_head; 'cur' likely references serialized input region (unknown), destination is stack-local.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference header from ref_attr into local pkcs11_ref; source origin unknown (could be serialized input).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference header into local pkcs11_ref; source is ref_attr (unknown origin).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into prefix2 using prefix_len provided by caller logic; bounds depend on prefix_len check upstream.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref header from cur into local structure; cur likely points into serialized buffer (caller-controlled).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from serialized area into local small buffer; size derived from parsed header.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header from ref into local head; source 'ref' origin unknown (could be REE or TA-owned).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into 'pre' buffer; 'pre' may be REE-visible or TA-owned depending on earlier allocation—origin uncertain.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller provided attr_size initialized to sizeof(bbool); get_attribute checks attr_size and returns BUFFER_TOO_SMALL when actual size > provided size, preventing overflow before the TEE_MemMove at line 187.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "obj_attrs via get_attribute_ptr -> attr_ptr",
      "propagation_path": [
        "obj_attrs -> get_attribute_ptr yields attr_ptr,size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "get_attribute checks attr_size and may return BUFFER_TOO_SMALL @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "TEE_MemMove(attr, attr_ptr, size) copies into caller buffer &bbool @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      ],
      "sink": "TEE_MemMove into caller buffer (&bbool) at line 187"
    },
    "exploitation_analysis": {
      "preconditions": [
        "An attribute's stored size must exceed caller-provided buffer size (sizeof(bbool))",
        "get_attribute must be invoked with attr_size pointer present (it is) — but this triggers BUFFER_TOO_SMALL early"
      ],
      "attack_scenario": "If the bounds check were absent, an oversized attribute returned by get_attribute_ptr could cause an overflow into the small caller buffer; with current code the function returns BUFFER_TOO_SMALL instead of copying.",
      "impact": "Potential memory corruption if bounds check removed; with current checks impact is mitigated."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-184",
        "recommendation": "Keep and maintain the existing attr_size check; ensure all callers supply correct attr_size and handle BUFFER_TOO_SMALL correctly."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct pre-copy bounds check comparing caller-provided size against actual size",
        "Caller (get_bool) initializes attr_size to sizeof(bbool)"
      ],
      "negative_indicators": [
        "attr_ptr and size originate from get_attribute_ptr which could be influenced by internal data; however check prevents copy when too large"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The explicit attr_size check at lines 180-184 ensures copies only occur when the caller buffer is large enough, preventing overflow at the sink line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "An effective bounds check (attr_size vs size) prevents the TEE_MemMove from copying more bytes than the caller buffer can hold; thus no vulnerable condition at this sink line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (caller &bbool)",
      "why_safe": "Caller initializes attr_size to sizeof(bbool), ensuring TEE_MemMove is guarded by attr_size check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241"
    }
  ],
  "residual_risks": [
    "wrap_data_by_symm_enc writes TA-private key material into params[2].memref.buffer (REE-visible) at processing.c:1266 — potential unencrypted secret exposure if callers provide MEMREF_OUTPUT; not applicable to line 187 but a separate structural risk"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check before copy",
      "Caller supplies correct attr_size for small buffer"
    ],
    "negative_indicators": [
      "None significant for this sink line"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety check prevents oversized copy; sink at line 187 is protected by early return on insufficient buffer, so classify as not vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes (TA-private secret/key) into REE-visible params[2].memref.buffer without demonstrated effective sanitizer ensuring output confidentiality or bounds beyond out_size update.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #62: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeTEE_MemMove

実行時間: 36.17秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Bounds check in get_attribute prevents the copy when *attr_size < size, and caller supplies attr_size initialized to sizeof(bbool), so the specific TEE_MemMove at line 187 is not vulnerable.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "attr",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src (read) via TEE_MemMove(dest, src, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "*attr_size (updated)",
        "rhs": "size (used as copy length/returned by get_attribute/get_attribute_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "Caller may check attr_size against size and return BUFFER_TOO_SMALL before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of destination pointer 'attr' (caller buffer) into TEE_MemMove; origin is caller-local (&bbool) in this call-site and considered TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of source pointer 'attr_ptr' (attribute storage) into TEE_MemMove; origin from get_attribute_ptr may be TA-managed or derived from REE-parsed data (ambiguous).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copy operation relies on prior conditional attr_size check; if attr_size is NULL caller-safety isn't enforced here (attr assumed non-NULL).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr)\n\tTEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller-provided attr_size is checked against attribute size in get_attribute and function returns BUFFER_TOO_SMALL before TEE_MemMove, preventing over-read/write; destination in this call is a TA-local buffer (&bbool), not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "Potentially REE-derived attribute storage (attr_ptr) via get_attribute_ptr",
      "propagation_path": [
        "params/... -> template/head parsed upstream (various) -> head passed into get_attribute_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "get_attribute(..., &bbool, &size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239 -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      ],
      "sink": "TEE_MemMove copying attribute bytes into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed or malicious attribute data referenced by attr_ptr with size > provided *attr_size",
        "Upstream parsing produced attr_ptr pointing to unexpected memory"
      ],
      "attack_scenario": "If attr_size were not checked or attr_size pointer were NULL, a large attribute size could cause an out-of-bounds copy; however current call-site provides attr_size and get_attribute enforces check.",
      "impact": "Potential memory corruption or information disclosure if bounds checks absent; not applicable here due to checks."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_attribute:176-178",
        "recommendation": "Ensure get_attribute_ptr performs strict validation of attr_ptr and reported size (reject invalid pointers/sizes originating from REE-parsed templates)."
      },
      {
        "type": "access_control",
        "location": "upstream parsing:unknown",
        "recommendation": "Treat attributes derived from REE as untrusted and validate all fields explicitly before use."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check in get_attribute that returns BUFFER_TOO_SMALL before TEE_MemMove",
        "Destination buffer at this call-site is a small TA-local buffer (&bbool) initialized size = sizeof(bbool)"
      ],
      "negative_indicators": [
        "Origin of attr_ptr and its size come from get_attribute_ptr which may derive from parsed templates whose origin can be REE; attr_ptr provenance is ambiguous"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Bounds check in get_attribute prevents the copy when *attr_size < size, and caller supplies attr_size initialized to sizeof(bbool), so the specific TEE_MemMove at line 187 is not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces attr_size checks and returns before TEE_MemMove; destination is TA-local small buffer so no REE leak or overflow at this site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_bool/get_attribute call sites",
      "evidence": "callers initialize size to sizeof(destination) before calling get_attribute"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller provides attr_size initialized to sizeof(bbool), and get_attribute checks size before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241,180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "copied only after size validated; provenance remains ambiguous so additional validation recommended",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-187"
    }
  ],
  "residual_risks": [
    "attr_ptr provenance ambiguous (could be derived from REE-parsed templates); ensure get_attribute_ptr strictly validates pointers and sizes"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit pre-copy bounds check",
      "Small, fixed destination size at caller"
    ],
    "negative_indicators": [
      "Ambiguous origin of source attr_ptr and its reported size"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 187 is protected by a prior conditional that returns on BUFFER_TOO_SMALL; combined with caller-provided size initialized to destination capacity, there is high confidence no overflow or REE leak occurs at this call.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1505,
      "function": "check_attrs_misc_integrity",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Validation relies on get_bool reading attributes that may originate from REE-parsed templates; stronger validation recommended.",
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_NEVER_EXTRACTABLE) && get_bool(head, PKCS11_CKA_EXTRACTABLE)) {"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "get_attribute_ptr provides attr_ptr and size from head; attr_ptr provenance is ambiguous and should be validated.",
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    }
  ]
}
フロー #63: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeTEE_MemMove

実行時間: 36.40秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The copy at line 187 is guarded by a binding check on attr_size that prevents the copy when destination is too small; the specific call from get_bool passes a size variable and thus is safe.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst[..len-1]",
        "rhs": "src[..len-1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pointer 'attr' is caller-provided buffer used as TEE_MemMove destination; may be smaller than 'size' unless caller-checked",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source pointer 'attr_ptr' originates from get_attribute_ptr and is copied into caller buffer; source provenance may be caller-influenced templates",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "length parameter 'size' controls the copy and originates from get_attribute_ptr; if attacker-influenced, may cause over-read/over-write if caller's attr_size not properly checked",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller provides attr_size and function checks '*attr_size < size' and returns PKCS11_CKR_BUFFER_TOO_SMALL before the copy, preventing overflow/over-read at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attr_ptr from get_attribute_ptr (derived from obj_attrs/templates)",
      "propagation_path": [
        "get_attribute_ptr -> get_attribute: rc <- get_attribute_ptr(head, attribute, &attr_ptr, &size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "get_attribute -> TEE_MemMove: TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      ],
      "sink": "TEE_MemMove copies 'size' bytes from attr_ptr into caller buffer 'attr'"
    },
    "exploitation_analysis": {
      "preconditions": [
        "caller supplies an attr_size pointer and a destination buffer 'attr'",
        "get_attribute_ptr returns a size larger than the provided *attr_size and attr_size is NULL or not checked (not the case here)"
      ],
      "attack_scenario": "If caller did not provide or check attr_size, a large size from get_attribute_ptr could cause out-of-bounds copy; in current call-site caller provides attr_size and the function returns instead of copying.",
      "impact": "Potential memory corruption or information disclosure if unchecked copy occurred; mitigated here by explicit buffer-size check and early return."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure all callers always pass a valid attr_size and validate attr pointer non-null before calling; consider explicit sanity checks in callers as well."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Presence of explicit size check that returns PKCS11_CKR_BUFFER_TOO_SMALL before copy",
        "Call-site (get_bool) supplies attr_size initialized to sizeof(bbool)"
      ],
      "negative_indicators": [
        "If callers omit attr_size or pass inconsistent sizes elsewhere, there is potential for misuse (but not at this target site)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy at line 187 is guarded by a binding check on attr_size that prevents the copy when destination is too small; the specific call from get_bool passes a size variable and thus is safe.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "An explicit bounds check in get_attribute prevents the TEE_MemMove at line 187 from executing when the destination buffer is too small.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_bool:235-245",
      "evidence": "caller initializes size to sizeof(bbool) and handles PKCS11_RV_NOT_FOUND / asserts rc == PKCS11_CKR_OK"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dst)",
      "why_safe": "Caller provides attr_size and code checks it before copying",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_size",
      "why_safe": "Used in bounds check and updated on BUFFER_TOO_SMALL return",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184,189-190"
    }
  ],
  "residual_risks": [
    "Callers that omit passing a valid attr_size or pass NULL could trigger copies elsewhere; ensure all callers follow the required contract."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check preceding the sink",
      "Caller initializes and supplies size correctly in observed call path"
    ],
    "negative_indicators": [
      "Some code paths in the codebase use raw TEE_MemMove with buffers whose provenance varies; requires holistic caller discipline"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety rules take precedence; since get_attribute enforces a pre-copy bounds check and the observed caller supplies a valid size, the sink at line 187 is not vulnerable here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "attr_size controls the copy length and is set based on get_attribute_ptr; if callers violate the attr_size contract, over-read/over-write could occur.",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size); ... TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #64: TA_InvokeCommandEntryPoint -> entry_create_object -> check_created_attrs_against_token -> check_attrs_misc_integrity -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectcheck_created_attrs_against_tokencheck_attrs_misc_integrityget_boolget_attributeTEE_MemMove

実行時間: 48.81秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks in get_attribute (attr_size comparison and early return) prevent overflow; the copy writes into a TA-private buffer, so no unencrypted REE output occurs at this line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n",
      "attr",
      "attr_ptr",
      "size",
      "pre",
      "prefix",
      "cli_head",
      "cur",
      "pkcs11_ref"
    ],
    "propagation": [
      {
        "lhs": "memory at dst",
        "rhs": "memory at src copied n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "cli_head",
        "rhs": "bytes copied from cur into &cli_head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-221"
      },
      {
        "lhs": "pre/prefix buffers",
        "rhs": "prefix copied into pre via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:445-447"
      }
    ],
    "sanitizers": [
      {
        "kind": "caller_size_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers often check provided size against needed size and return BUFFER_TOO_SMALL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' aliases caller-local buffer (&bbool) which is TA-private; record binding of dst to TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination &cli_head is a stack-allocated struct receiving data from 'cur' (serialised input) which may originate from REE; dst is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=len,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies prefix into pre using strlen(prefix) without explicit bounds here; if pre's allocation is attacker-controlled or insufficient this may overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'size' bytes from attr_ptr into caller buffer 'attr' (&bbool) but caller provided attr_size == sizeof(bbool) so get_attribute returns BUFFER_TOO_SMALL if size > sizeof(bbool); destination is TA-private stack, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attributes parsed from REE-provided template (via serialargs -> template -> created attrs)",
      "propagation_path": [
        "params (REE) -> template (TEE_Malloc/parsed) @ object.c:325-333",
        "template -> head (created attributes) @ object.c:346-352",
        "head -> get_attribute_ptr(...) -> attr_ptr,size @ attributes.c:176",
        "TEE_MemMove(attr, attr_ptr, size) @ attributes.c:187"
      ],
      "sink": "TEE_MemMove copying into TA-private buffer (&bbool) in get_attribute"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malicious or malformed attribute data reachable in attr_ptr with size > expected",
        "Absence of attr_size checks at call-site"
      ],
      "attack_scenario": "An attacker supplies an attribute whose size exceeds the caller's buffer; get_attribute detects size mismatch and returns BUFFER_TOO_SMALL, preventing the copy into the small buffer.",
      "impact": "If size checks were absent, possible stack/heap overflow or information exposure; with current checks impact is mitigated."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure all call-sites check returned sizes and handle BUFFER_TOO_SMALL; prefer explicit max-size checks before calling get_attribute where possible."
      },
      {
        "type": "type_validation",
        "location": "attributes parsing: object.c:325-333",
        "recommendation": "Validate attribute content and bounds when parsing serial input to avoid malformed sizes propagated into attr_ptr/size."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct bounds check in get_attribute sets *attr_size and returns BUFFER_TOO_SMALL if caller buffer too small",
        "Destination of copy is TA-private local (&bbool), not REE-visible"
      ],
      "negative_indicators": [
        "attr_ptr/src region provenance is partially unknown (could be derived from REE)",
        "Some call-sites perform copies using lengths like strlen(prefix) without local bounds checks"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks in get_attribute (attr_size comparison and early return) prevent overflow; the copy writes into a TA-private buffer, so no unencrypted REE output occurs at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces a size check and returns BUFFER_TOO_SMALL before any copy when the caller buffer is too small; the destination is TA-private.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "not_found_handling",
      "location": "get_bool:241-242",
      "evidence": "if get_attribute returns PKCS11_RV_NOT_FOUND the caller returns false"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller supplies attr_size == sizeof(bbool) and get_attribute returns BUFFER_TOO_SMALL if actual size exceeds that",
      "evidence": "attributes.c:237-242, attributes.c:180-184"
    },
    {
      "arg": "head",
      "why_safe": "head is validated earlier by check_attrs_misc_integrity and other checks in the call chain though some checks rely on template parsing",
      "evidence": "pkcs11_attributes.c:1503-1524; object.c:325-336"
    }
  ],
  "residual_risks": [
    "Weak input validation of attribute semantics: boolean attributes in 'head' derived from REE input can affect control flow (e.g., trusted/token) and may need stronger authorization checks",
    "Some TEE_MemMove call-sites elsewhere use strlen(prefix) or unbounded lengths without explicit local buffer-size asserts"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check prevents copying when dest buffer too small",
      "Destination is TA-private"
    ],
    "negative_indicators": [
      "Source region (attr_ptr) provenance not fully explicit in all paths",
      "Policy-level issues (attributes from REE influencing privileges) remain"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the explicit size check and early return in get_attribute and the TA-private destination buffer, the TEE_MemMove at line 187 is not a vulnerability; remaining issues are policy/validation related and flagged as structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 206,
      "function": "entry_create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: params array from REE passed into entry_create_object; origin is REE-visible memref",
      "code_excerpt": "rc = entry_create_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided REE-visible out->memref.buffer; structural risk of writing to shared buffer (but obj_handle is non-sensitive)",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "check_created_attrs_against_token",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Decisions about trusted/token attributes are made from 'head' which may have been derived from REE input; insufficient authorization checks here could allow privilege escalation",
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies prefix into pre using strlen(prefix) without explicit local bounds here; potential overflow if pre not sized appropriately",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #65: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_paircheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 36.25秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: get_attribute enforces attr_size checks and refuses to perform the copy when the buffer is too small; destination is TA-private and the copied boolean is non-sensitive, so no unencrypted_output applies.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "get_attribute checks attr_size against size and returns BUFFER_TOO_SMALL before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'attr' is a caller-local TA buffer (&bbool) receiving data via TEE_MemMove; dest is TA-private but may receive REE-influenced content",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'attr_ptr' may alias object attribute storage that was derived from REE-provided templates; provenance REE->TA (attr content REE-influenced)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Length 'size' is used to control the copy; although checked earlier, its provenance may be influenced by attribute metadata",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller supplied attr_size initially equals sizeof(bbool) and get_attribute checks attr_size against actual size and returns BUFFER_TOO_SMALL before TEE_MemMove; destination is TA-private and not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attribute storage (obj_attrs) possibly influenced by REE-provided templates",
      "propagation_path": [
        "params (REE) -> pub_template/priv_template (processing.c)",
        "pub_head/priv_head (TA) -> get_attribute_ptr @ attributes.c:176",
        "attr_ptr -> TEE_MemMove(attr, attr_ptr, size) @ attributes.c:187"
      ],
      "sink": "TEE_MemMove copying attribute payload into TA-local buffer (&bbool)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious or malformed attribute metadata leading get_attribute_ptr to report a larger size than caller provided"
      ],
      "attack_scenario": "Attacker supplies REE-controlled attribute templates to try to cause an oversized copy into a small TA buffer; however get_attribute enforces size check and returns BUFFER_TOO_SMALL preventing the copy.",
      "impact": "If unchecked, could lead to memory corruption; current checks mitigate this call-site."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "attributes.c:176-184",
        "recommendation": "Ensure get_attribute_ptr validates attr_ptr and size against object storage bounds and maintain defensive checks before any copy."
      },
      {
        "type": "access_control",
        "location": "attributes.c:176|unknown",
        "recommendation": "Harden origin validation for attributes derived from REE to reduce trust in attr metadata."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute that returns BUFFER_TOO_SMALL before copying",
        "Destination is TA-local stack buffer (&bbool) with expected small fixed size"
      ],
      "negative_indicators": [
        "attr_ptr provenance is REE-influenced (attributes constructed from REE templates)",
        "Some upstream bindings have unknown src/dst sizes"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "get_attribute enforces attr_size checks and refuses to perform the copy when the buffer is too small; destination is TA-private and the copied boolean is non-sensitive, so no unencrypted_output applies.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Effective bounds check (attr_size vs size) prevents oversized copy and destination is not REE-visible, so no information disclosure or memory-safety issue at this call-site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "attributes.c:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "attributes.c:176-178",
      "evidence": "get_attribute_ptr return code is checked and propagated"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "Caller provides buffer sized sizeof(bbool) and get_attribute enforces size checks before copying",
      "evidence": "attributes.c:237-241,180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "Resolved via get_attribute_ptr and checked return code before use",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "attr_ptr provenance is REE-influenced; if get_attribute_ptr has flaws in validating source storage bounds, a future change could bypass current checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check preventing copy when destination smaller than source",
      "Immediate return on BUFFER_TOO_SMALL prior to TEE_MemMove"
    ],
    "negative_indicators": [
      "Upstream attr_ptr size provenance partly unknown",
      "Several bindings record src/dst sizes as unknown"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The pre-copy bounds check and non-REE destination make this TEE_MemMove usage safe against overflow and not an information disclosure; structural provenance concerns remain but do not make this line vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Attribute storage (attr_ptr) may originate from REE-influenced templates; content copied into TA buffers though current size checks prevent overflow.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #66: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keycheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 39.97秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: get_attribute enforces a bounds check and returns without copying if destination is too small; the copy at line 187 is TA-internal and not to REE, so it is not classified as unencrypted output or a vulnerability.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided buffer passed as first arg to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src",
        "rhs": "attribute storage pointer passed as second arg to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "n",
        "rhs": "size variable passed as third arg to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy; caller is expected to enforce bounds (get_attribute does bounds-check before calling)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest parameter 'attr' aliases caller stack buffer (&bbool) which receives bytes from stored attribute; origin is TA stack (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Src parameter 'attr_ptr' is pointer into stored attribute data (TA-owned), treated as TEE-private source for copy.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Size parameter 'size' originates from attribute metadata and is used to control the copy; if incorrect it can cause overflow of dest.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller provided attr_size (initialized to sizeof(bbool)) and get_attribute performs an explicit size check returning BUFFER_TOO_SMALL before the TEE_MemMove, and the copy is between TA-private buffers.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attribute storage pointer (attr_ptr) from get_attribute_ptr, TA-private",
      "propagation_path": [
        "attr_ptr <- get_attribute_ptr(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      ],
      "sink": "TEE_MemMove into caller buffer (&bbool) in get_attribute"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Stored attribute size > caller-provided buffer size (would be caught by check)",
        "No override of the size check path"
      ],
      "attack_scenario": "If preconditions existed and the size-check were bypassed, an oversize attribute could overflow the caller buffer; current code prevents that by returning BUFFER_TOO_SMALL.",
      "impact": "Potential memory corruption if unchecked, but not reachable here due to explicit checks."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute:180-184",
        "recommendation": "Keep and audit size checks; ensure all callers handle BUFFER_TOO_SMALL return and don't use truncated/incorrect sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute before TEE_MemMove",
        "TEE_MemMove here copies between TA-private buffers (not REE-visible)"
      ],
      "negative_indicators": [
        "Relies on correct behavior of get_attribute_ptr to supply accurate size"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "get_attribute enforces a bounds check and returns without copying if destination is too small; the copy at line 187 is TA-internal and not to REE, so it is not classified as unencrypted output or a vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Bounds-check before copy prevents overflow and the copy is between TEE-private buffers, not to REE.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "null_check",
      "location": "get_attribute:176-178",
      "evidence": "rc = get_attribute_ptr(...); if (rc) return rc;"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller stack buffer sized and checked via attr_size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "obtained from get_attribute_ptr and validated (rc checked) before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "processing.c:1266 writes wrapped key material into params[2].memref.buffer (REE-visible) — sensitive TA-private key material may flow to REE if not properly checked or intended"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit pre-copy bounds check",
      "Copies are between TEE-private buffers at this call site"
    ],
    "negative_indicators": [
      "Downstream code (entry_wrap_key) contains writes to REE-visible buffers of sensitive material (separate structural risk)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 187's TEE_MemMove is protected by preconditions in get_attribute and operates on TA-private memory; therefore it's not vulnerable. Separate structural risks elsewhere are reported.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) using out_size derived from params[2].memref.size without an effective upper bound check; key_data is TA-private secret being written to shared memory.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #67: TA_InvokeCommandEntryPoint -> entry_create_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 57.82秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety bounds check prevents overflow at this TEE_MemMove; the copied boolean is non-sensitive and is written into a TA-local buffer, so it does not meet criteria for unencrypted_output promotion.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "&cli_head",
        "rhs": "cur (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "&pkcs11_ref",
        "rhs": "ref_attr (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "Caller ensures attr_size >= size or returns BUFFER_TOO_SMALL before MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller-provided buffer 'attr' via TEE_MemMove; destination origin (caller buffer) can be TA-private or caller-controlled (ambiguous).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serial header bytes from 'cur' into local cli_head via TEE_MemMove; source 'cur' may be REE-originated serialized input (shared).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference structure from ref_attr into local pkcs11_ref via TEE_MemMove; ref_attr provenance may be untrusted input.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller supplies attr_size initialized to sizeof(bbool); get_attribute checks attr_size against attribute size and returns BUFFER_TOO_SMALL if insufficient, preventing an out-of-bounds copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attribute storage (attr_ptr) via get_attribute_ptr",
      "propagation_path": [
        "attr_ptr <- get_attribute_ptr(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187",
        "bbool <- attr in get_bool @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239"
      ],
      "sink": "TEE_MemMove copying attribute bytes into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls attribute storage returned by get_attribute_ptr (requires ability to influence object attributes or serialized input).",
        "No larger-than-expected attribute size (but if larger, get_attribute returns BUFFER_TOO_SMALL and prevents copy)."
      ],
      "attack_scenario": "Maliciously crafted attribute data could be provided, but size checks prevent overflow into caller buffer; no direct path to leak sensitive TA-private data to REE at this line.",
      "impact": "If size checks were absent, could cause memory corruption; with checks present, impact is limited/non-exploitable here."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "get_attribute:176-187",
        "recommendation": "Ensure get_attribute_ptr validates provenance of attr_ptr and enforces strict attribute schemas before copying."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute prevents copying when attr_size < size",
        "Caller initializes attr_size to sizeof(bbool) before call"
      ],
      "negative_indicators": [
        "Origin of attr_ptr can be REE-visible or TA-private depending on call-site (ambiguous)",
        "TEE_MemMove copies from attr_ptr without further provenance checks"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety bounds check prevents overflow at this TEE_MemMove; the copied boolean is non-sensitive and is written into a TA-local buffer, so it does not meet criteria for unencrypted_output promotion.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Effective bounds checking (attr_size compare) and caller-initialized small destination prevent out-of-bounds copy and no sensitive TA-private secret is sent to REE at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "Caller provides buffer and attr_size initialized to sizeof(bbool); get_attribute enforces size check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "Verified via get_attribute_ptr error handling before copy but provenance may be ambiguous; copy guarded by size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "attr_ptr provenance ambiguity: source may be REE-visible serialized input in some call-sites, which could allow malicious attribute content though size-check prevents overflow at this line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size checks in get_attribute",
      "Fixed small destination size in get_bool (sizeof(bbool))"
    ],
    "negative_indicators": [
      "Unclear provenance of attr_ptr at some call-sites (REE vs TA)",
      "TEE_MemMove performs raw copy conditioned only on size"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the explicit bounds check in get_attribute and caller-provided small buffer, this TEE_MemMove is protected from overflow and does not produce an unencrypted sensitive output to REE; therefore not a vulnerability at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute bytes into caller buffer; destination origin can be TA-private or caller-controlled and attr_ptr provenance is ambiguous.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies serial header from potentially REE-originated buffer into local cli_head; serialized input provenance may be untrusted.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Copies reference structure from ref_attr (possibly untrusted) into local pkcs11_ref.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local obj_handle into caller-provided out->memref.buffer (REE-visible); destination is shared but value is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #68: TA_InvokeCommandEntryPoint -> entry_destroy_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_destroy_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 45.57秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The copy is guarded by a size check in get_attribute; TEE_MemMove executes only when the destination buffer is large enough, and both sides are TA-private. The remaining issue is a caller-side assertion on unexpected rc (DoS), not a memory-safety or disclosure vulnerability at this sink.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "attr",
      "attr_ptr",
      "size",
      "attr_size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "get_attribute_ptr(head, attribute, &attr_ptr, &size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177"
      },
      {
        "lhs": "TEE_MemMove(dest=attr, src=attr_ptr, size)",
        "rhs": "copy from attr_ptr to attr of length size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "*attr_size (out)",
        "rhs": "size assigned to *attr_size on return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:189-190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "If attr_size && *attr_size < size then set *attr_size = size and return PKCS11_CKR_BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'attr' is a caller-provided buffer (e.g., &bbool) bound into this helper and written via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'attr_ptr' originates from get_attribute_ptr and points into object attributes (TA-managed); it's the read source for the copy.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 180,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Length 'size' returned by get_attribute_ptr is used to control the copy; its provenance affects safety of the move.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute performs a size check (returns BUFFER_TOO_SMALL) before any copy; TEE_MemMove at line 187 only runs when attr_size >= size, so no buffer overflow and both src/dst are TA-private (no REE leak).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "object attributes (attr_ptr) read via get_attribute_ptr",
      "propagation_path": [
        "params/obj attributes -> get_attribute_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177",
        "get_attribute -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187",
        "get_bool caller receives local bbool"
      ],
      "sink": "TEE_MemMove writes into caller buffer (attr) inside TA"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker-controlled attribute size differs from expected small size"
      ],
      "attack_scenario": "If attribute size is larger than caller buffer, get_attribute returns BUFFER_TOO_SMALL; get_bool asserts on unexpected rc causing a potential crash (denial-of-service), but no overflow or data leak occurs.",
      "impact": "Possible denial-of-service via assert crash; no direct memory corruption or plaintext exfiltration at this sink."
    },
    "missing_mitigations": [
      {
        "type": "error_check",
        "location": "attributes.c:239",
        "recommendation": "Handle PKCS11_CKR_BUFFER_TOO_SMALL return path gracefully in callers (avoid assert), e.g., propagate error instead of asserting."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute preventing copy when dest size < src size",
        "Source and destination are TA-private (no REE-visible buffer at this call)"
      ],
      "negative_indicators": [
        "Callers (get_bool) assert rc == OK and do not handle BUFFER_TOO_SMALL, causing potential crash"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The copy is guarded by a size check in get_attribute; TEE_MemMove executes only when the destination buffer is large enough, and both sides are TA-private. The remaining issue is a caller-side assertion on unexpected rc (DoS), not a memory-safety or disclosure vulnerability at this sink.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Effective bounds check in get_attribute prevents overflow and the buffers involved are TA-private, so no unencrypted REE output occurs at this call.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "attributes.c:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "attributes.c:241-245",
      "evidence": "caller checks rc and asserts OK (get_bool asserts rc == PKCS11_CKR_OK)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "size checked against requested size before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "obtained from get_attribute_ptr which provides size; used only after size check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177"
    }
  ],
  "residual_risks": [
    "assert in get_bool on unexpected rc can cause denial-of-service if attribute size mismatches expected size"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check prevents copy when dest too small",
      "No REE-visible buffers involved at this TEE_MemMove call"
    ],
    "negative_indicators": [
      "Callers do not handle BUFFER_TOO_SMALL robustly (assert), enabling possible crash"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Guarding checks prevent overflow and disclosure at this sink; remaining concern is DoS from unchecked error propagation, which is a robustness issue rather than an exploitable overflow or data leak here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "TEE_MemMove reads attribute storage into caller buffer; correctness depends on size returned by get_attribute_ptr and caller handling of BUFFER_TOO_SMALL.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #69: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valuecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 41.31秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: The function performs a bounds check on attr_size before copying and in the evaluated call-site the destination is a TA-local buffer, preventing overflow and immediate REE disclosure.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "data copied from src by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "n (copy length)",
        "rhs": "caller-supplied size argument",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller checks attr_size and may return BUFFER_TOO_SMALL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute data from attr_ptr (TEE-private object storage) into caller buffer 'attr'; if caller buffer aliases REE-visible memory this can expose TA data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination pointer 'attr' at call-site may be a caller-provided buffer (e.g., &bbool or REE-origin); record origin as TEE-private for local buffers or REE-visible when caller supplies shared mem.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: rc = get_attribute(head, attribute, &bbool, &size); -> TEE_MemMove(attr, attr_ptr, size)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source pointer 'attr_ptr' originates from get_attribute_ptr (object attribute storage) and is treated as TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "attr_ptr obtained via get_attribute_ptr(...) then used in TEE_MemMove"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller-supplied attr_size is checked against attribute size and get_attribute returns BUFFER_TOO_SMALL without copying if dest is too small; at this call-site attr is often a TA-local buffer (&bbool), so no REE-visible copy occurs here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The function performs a bounds check on attr_size before copying and in the evaluated call-site the destination is a TA-local buffer, preventing overflow and immediate REE disclosure.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_bool:241-244",
      "evidence": "if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr_size",
      "why_safe": "Checked against actual attribute size and adjusted/returned as BUFFER_TOO_SMALL if insufficient",
      "evidence": "attributes.c:180-184"
    },
    {
      "arg": "attr (destination)",
      "why_safe": "In this call-site destination is a local TA buffer (&bbool) sized sizeof(bbool)",
      "evidence": "attributes.c:235-239"
    }
  ],
  "residual_risks": [
    "Line 187 copies attribute data into intermediate TA buffers (e.g., template/cli_ref->data in other call-sites); those buffers are later copied to REE at object.c:910, creating potential information exposure downstream."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check in get_attribute prevents copying when destination is too small",
      "Assert in get_bool enforces expected success path"
    ],
    "negative_indicators": [
      "Attribute data originates from object storage that may contain sensitive attributes",
      "Some call-sites pass buffers that are later shipped to REE (indirect exposure)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety protections (bounds check) prevent overflow at the evaluated TEE_MemMove call and, at this call-site, the destination is TA-local; therefore no immediate vulnerability at line 187. However, copying attribute data into TA-side intermediate buffers that are later copied to REE is a structural risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Template (populated earlier via get_attribute/TEE_MemMove into cli_ref->data) is copied wholesale to REE-visible out->memref.buffer, potentially exposing attributes flagged sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}
フロー #70: TA_InvokeCommandEntryPoint -> entry_get_object_size -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_object_sizecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 54.24秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Existing size check in get_attribute prevents copying more bytes than the caller buffer (attr_size) and the destination here is a TA-local small buffer; therefore the specific sink call is not vulnerable.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src via TEE_MemMove(dest, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "cli_head (written)",
        "rhs": "cur via TEE_MemMove(&cli_head, cur, sizeof(cli_head))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "pre (written)",
        "rhs": "prefix via TEE_MemMove(pre, prefix, strlen(prefix))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller checks attr_size < size and returns BUFFER_TOO_SMALL before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of destination 'attr' bound to caller buffer (stack-local bbool in get_bool); copies from attr_ptr into caller buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of destination '&cli_head' bound to local struct on stack; copies from 'cur' (serial buffer) into local header",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of destination 'pre' bound to local pointer derived earlier; copies prefix (possibly REE-originated) into pre without explicit bounds here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "TEE_MemMove performs a raw memory copy from attr_ptr to attr; caller-side size check exists but copy uses 'size' returned by get_attribute_ptr which must be trusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller (get_bool) supplies attr_size = sizeof(bbool) and get_attribute enforces attr_size >= size or returns BUFFER_TOO_SMALL before performing TEE_MemMove; dest is TA-local stack buffer (&bbool) and copied data originates from TA-managed attributes.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "obj attributes (TA-managed) via get_attribute_ptr",
      "propagation_path": [
        "obj->attributes -> get_attribute_ptr returns attr_ptr/size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "get_attribute(head, attribute, &bbool, &size) -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187",
        "get_bool returns bbool to callers (e.g., object_is_private) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:244-245"
      ],
      "sink": "TEE_MemMove(dest=attr (caller buffer), src=attr_ptr, n=size) at attributes.c:187"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed or malicious attr_ptr/size returned by get_attribute_ptr (but get_attribute_ptr return is checked)",
        "Caller provides insufficient attr_size (handled by BUFFER_TOO_SMALL)"
      ],
      "attack_scenario": "An attacker would need get_attribute_ptr to return a size larger than the caller-provided buffer without triggering the existing size check; not observed here.",
      "impact": "Potential memory corruption if size checking were absent; in this call path checks prevent overflow so impact is low."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute:176-187",
        "recommendation": "Ensure get_attribute_ptr cannot return a manipulated size/attr_ptr (validate attr_ptr points inside TA-owned memory and size sanity checks)"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Caller initializes attr_size to sizeof(bbool)",
        "get_attribute enforces attr_size >= size or returns BUFFER_TOO_SMALL",
        "assert(rc == PKCS11_CKR_OK) ensures expected code path"
      ],
      "negative_indicators": [
        "get_attribute_ptr implementation not shown here; its correctness is assumed",
        "some other TEE_MemMove sites copy from REE-visible buffers into TA locals elsewhere"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Existing size check in get_attribute prevents copying more bytes than the caller buffer (attr_size) and the destination here is a TA-local small buffer; therefore the specific sink call is not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Caller-provided attr_size bounds are checked and get_attribute returns BUFFER_TOO_SMALL prior to TEE_MemMove; destination is TA-private and source is TA-managed.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "existence_check",
      "location": "get_attribute:176-178",
      "evidence": "rc = get_attribute_ptr(...); if (rc) return rc;"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "Caller provided buffer &bbool of size sizeof(uint8_t); get_attribute enforces size <= *attr_size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-242"
    },
    {
      "arg": "attr_size",
      "why_safe": "Initialized to sizeof(bbool) by caller and used in bounds check before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-241"
    }
  ],
  "residual_risks": [
    "get_attribute_ptr correctness not shown; if it can return malformed size/attr_ptr that bypasses checks, risk remains"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check immediately before TEE_MemMove",
      "Small, fixed destination in caller (bbool) initialized and checked"
    ],
    "negative_indicators": [
      "Upstream get_attribute_ptr implementation not present for review"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The sink at line 187 is protected by a prior size check that returns BUFFER_TOO_SMALL if the caller buffer is too small; destination and source are TA-private here, so no information leak or overflow is evident.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc to caller-provided params[0].memref.buffer (REE-visible); destination is shared but data is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "entry_get_object_size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies computed obj_size into REE-visible out->memref.buffer; destination is shared but obj_size is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies header from serial buffer 'cur' (likely REE-originated) into TA stack-local cli_head; caller ensures len calculations but serial buffer provenance is REE-visible.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "attributes printing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Copies prefix (potentially REE-originated) into local buffer without an explicit bounds check at this site.",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #71: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 59.68秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Bounds-checking (attr_size negotiation) prevents unsafe copy at this callsite, so line 187 is not classified vulnerable; remaining concerns are structural (unknown src provenance and potential assertion-induced DoS).

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst[0..n-1]",
        "rhs": "src[0..n-1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "dst[0..n-1]",
        "rhs": "src[0..n-1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220-221"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "Callers often check/adjust attr_size and may return BUFFER_TOO_SMALL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'attr' is caller stack memory (TEE-private) while source 'attr_ptr' provenance is from get_attribute_ptr and may be unknown/shared; alias/binding of pointers at call-site",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src to dst without in-function validation of src/dst regions or that dst has at least 'size' bytes (relies on caller); if caller-supplied sizes are tainted this is risky",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site copies a header from serialized input ('cur') into a local struct; source 'cur' originates from serial buffer (REE-visible) and is aliased into local TEE memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller supplies attr_size and get_attribute checks attr_size vs required size and returns BUFFER_TOO_SMALL before performing TEE_MemMove, so in-path copy into caller buffer is guarded.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "obj attributes (may originate from REE inputs)",
      "propagation_path": [
        "params (caller memref) -> serialargs -> template -> obj->attributes @ object.c:992-1002",
        "obj->attributes -> get_attribute_ptr -> attr_ptr,size @ attributes.c:176",
        "attr_ptr,size -> get_attribute -> TEE_MemMove(attr, attr_ptr, size) @ attributes.c:176-187"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) copying into caller-provided buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed/tainted attribute data causing size mismatch",
        "Absence of caller-side attr_size checks (not the case here)"
      ],
      "attack_scenario": "An attacker-controlled serialized attribute could attempt to make required size larger than provided buffer to trigger BUFFER_TOO_SMALL or, if caller misuses attr_size, cause oversized copy; with current callers, buffer-size negotiation prevents direct overflow.",
      "impact": "If misused elsewhere, possible memory corruption; with current callsite, likely at most error return or assertion-failure (DoS)."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "attributes.c:176-184",
        "recommendation": "Validate attr_ptr provenance and ensure attr_size checks are consistently handled by all callers (avoid callers asserting on unexpected rc)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "get_attribute checks attr_size against required size and returns BUFFER_TOO_SMALL before copying",
        "callsite in get_bool provides a fixed-size local buffer (sizeof bbool) that matches expected boolean size"
      ],
      "negative_indicators": [
        "Origin of attr_ptr/src_region is unknown (could be REE-influenced)",
        "Some callers may assert on unexpected rc, which could cause DoS"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Bounds-checking (attr_size negotiation) prevents unsafe copy at this callsite, so line 187 is not classified vulnerable; remaining concerns are structural (unknown src provenance and potential assertion-induced DoS).",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces size negotiation and returns BUFFER_TOO_SMALL before TEE_MemMove; callers provide appropriate small buffers for booleans, preventing overflow or direct data leakage at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller provides a local buffer sized to sizeof(bbool) and get_attribute enforces copy size",
      "evidence": "attributes.c:237-241, attributes.c:180-184"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "checked via get_attribute_ptr return code before use; however provenance is unknown",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "assertion on unexpected rc in get_bool may cause DoS if attr_size negotiation yields BUFFER_TOO_SMALL instead of OK",
    "attr_ptr source region is unknown (could be REE-influenced) and not validated here beyond get_attribute_ptr"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit buffer-size check before copy",
      "small, fixed-size caller buffer for boolean case"
    ],
    "negative_indicators": [
      "unknown provenance of source pointer attr_ptr",
      "caller-side assert handling may terminate TA on unexpected rc"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety checks precede the copy and prevent overflow for this usage pattern; no evidence of sensitive TA-private data being copied to REE at this call, so no information-disclosure classification is promoted.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr relying on caller-provided attr_size; attr_ptr provenance not fully validated here.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "why": "get_attribute_ptr supplies attr_ptr and size; its validation determines safety but its provenance is external to this function.",
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 241,
      "function": "get_bool",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "why": "get_bool asserts on unexpected rc values (other than NOT_FOUND and OK), which could lead to TA abort if callers receive BUFFER_TOO_SMALL.",
      "code_excerpt": "if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);"
    }
  ]
}
フロー #72: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_access_attrs_against_token -> object_is_private -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_access_attrs_against_tokenobject_is_privateget_boolget_attributeTEE_MemMove

実行時間: 41.33秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: Bounds check on attr_size and controlled attr_ptr source ensure the copy at line 187 does not expose TA-private sensitive data to REE nor cause an unchecked overflow in this context.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest[0..n-1]",
        "rhs": "src[0..n-1] copied",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' (&bbool) is caller memory (TA stack) and will be written by TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr (attribute storage) and is read as src for the move.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is a TA-local buffer (&bbool) and get_attribute enforces size checks (returns BUFFER_TOO_SMALL) before copying; source is TA attribute storage, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Bounds check on attr_size and controlled attr_ptr source ensure the copy at line 187 does not expose TA-private sensitive data to REE nor cause an unchecked overflow in this context.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_bool:244",
      "evidence": "assert(rc == PKCS11_CKR_OK) ensures get_attribute succeeded before using bbool"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool in caller)",
      "why_safe": "caller-provided stack buffer sized for a uint8_t and used with get_attribute's bounds check",
      "evidence": "attributes.c:237-241"
    },
    {
      "arg": "attr_ptr (source)",
      "why_safe": "comes from get_attribute_ptr resolving attribute storage (TA-private) not direct REE memory in this call chain",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "If get_attribute is later invoked with attr pointing into REE-shared memory (different call-sites), TEE_MemMove could write TA-derived data into REE-visible buffers; those cases are handled as structural_risks."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check in get_attribute prior to copy",
      "attr is a small local stack buffer (&bbool)",
      "Source attr_ptr resolved internally from obj attributes (TA-private) in this call chain"
    ],
    "negative_indicators": [
      "Some call-sites of TEE_MemMove in the file copy from possibly REE-provided buffers (other lines), but not line 187",
      "attr_size and size variables are updated by helper functions (get_attribute_ptr) whose internals were not exhaustively verified here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks and the local nature of the destination at this call-site prevent overflow or inadvertent REE exposure; no sanitizer failures were observed for line 187.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "why": "TEE_MemMove may copy attribute bytes into caller-supplied buffer; correctness depends on get_attribute_ptr and attr_size usage at call-sites.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); needs correct ptypes/size checks (which are present) to avoid misuse.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=template_size"
        ]
      },
      "why": "Copies object attributes from obj->attributes into newly allocated head_new; ensure template_size computed from attrs_size is correct to avoid overflow.",
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    }
  ]
}
フロー #73: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> object_is_token -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueobject_is_tokenget_boolget_attributeTEE_MemMove

実行時間: 54.88秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety check in get_attribute prevents exceeding destination size; the sink writes into a TA-local 1-byte buffer and does not send TA-private sensitive data to REE, so no vulnerability at this line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "attr",
      "attr_ptr",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst (destination buffer)",
        "rhs": "caller-provided pointer passed as first arg to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src (source pointer)",
        "rhs": "attr_ptr returned by get_attribute_ptr and passed as second arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-187"
      },
      {
        "lhs": "len",
        "rhs": "size value computed/returned by get_attribute_ptr and passed as third arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of caller-provided destination buffer (attr) passed into TEE_MemMove; destination originates from caller-local &bbool in get_bool",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=unknown,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of source pointer (attr_ptr) passed into TEE_MemMove; attr_ptr originates from get_attribute_ptr and its region could be TA-private or REE-visible (unknown)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from attr_ptr into attr without validating that attr_ptr points to trusted memory region; size originates from get_attribute_ptr and may be influenced by input",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is a TA-local 1-byte buffer (&bbool) and get_attribute enforces attr_size check (returns BUFFER_TOO_SMALL) when size > provided *attr_size, preventing overflow; no evidence of sensitive TA-private data being copied to REE at this call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attr_ptr (from get_attribute_ptr, source region unknown; may originate from TA structures or REE-derived data)",
      "propagation_path": [
        "params (REE-origin) -> serialargs -> template (object.c:992-1004)",
        "template->attrs_size -> template_size computation (object.c:1040)",
        "get_attribute_ptr returns attr_ptr and size (attributes.c:176)",
        "get_attribute copies: TEE_MemMove(attr, attr_ptr, size) (attributes.c:186-187)",
        "get_bool returns bbool (attributes.c:233-245)"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) writing into local &bbool"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malicious or malformed attribute data such that get_attribute_ptr returns a size larger than provided attr_size (already handled by check).",
        "Ability to influence attr_ptr contents if attr_ptr points to attacker-controlled memory."
      ],
      "attack_scenario": "An attacker supplies crafted attribute data that would make get_attribute attempt to copy more than the provided buffer size; however, get_attribute detects this and returns BUFFER_TOO_SMALL, so direct overflow is prevented.",
      "impact": "If checks were missing, potential memory corruption; with present checks, no overflow at this sink. Unknown-origin of attr_ptr could allow leakage if later copied to REE, but not at this line."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "attributes.c:176-187",
        "recommendation": "Ensure get_attribute_ptr guarantees attr_ptr points to trusted/TA-private memory or perform explicit region validation before TEE_MemMove."
      },
      {
        "type": "type_validation",
        "location": "attributes.c:176-190",
        "recommendation": "Validate returned 'size' against expected attribute type sizes and bounds to reduce ambiguity about source origin and length."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct bounds check in get_attribute (lines 180-184) prevents copying when provided buffer is too small.",
        "Destination here is a fixed 1-byte local buffer (&bbool), minimizing overflow risk."
      ],
      "negative_indicators": [
        "attr_ptr source region is unknown (could be REE-visible/shared), allowing potential upstream integrity concerns.",
        "Some callers derive attributes from REE-provided buffers (serialargs), so upstream validation matters."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety check in get_attribute prevents exceeding destination size; the sink writes into a TA-local 1-byte buffer and does not send TA-private sensitive data to REE, so no vulnerability at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces a buffer-size check and returns BUFFER_TOO_SMALL when the source size exceeds the provided destination size; the specific call uses a 1-byte destination (&bbool), preventing overflow and no sensitive TA-private data is sent to REE at this call.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_bool:241-245",
      "evidence": "rc == PKCS11_RV_NOT_FOUND -> return false; assert(rc == PKCS11_CKR_OK)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "Caller provides attr_size initialized to sizeof(bbool)=1; get_attribute checks and prevents larger copies",
      "evidence": "attributes.c:237-241,180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "Region of attr_ptr is unknown; copying limited by size check but origin validation is absent",
      "evidence": "attributes.c:176-187"
    }
  ],
  "residual_risks": [
    "attr_ptr source region unknown (could be REE-visible/shared); while overflow is prevented here, upstream unchecked source integrity could affect other operations.",
    "Upstream serialargs-derived templates from REE may lead to malformed attributes used elsewhere if not fully validated."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check present and triggered before copy.",
      "Destination buffer is a known small local buffer."
    ],
    "negative_indicators": [
      "attr_ptr origin is unknown; potential for other misuse elsewhere.",
      "Assertions used (assert(rc == PKCS11_CKR_OK)) may be disabled in some builds."
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Safety is determined by the explicit attr_size check in get_attribute which prevents copying more bytes than the caller allowed; in this call the caller's allowed size equals sizeof(bbool), so the copy is safe and not an information-disclosure to REE.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into attr; size originates from get_attribute_ptr and attr_ptr region is not validated, so upstream input validation is weak.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_alloc_get_attributes derives template from caller memref buffer; template->attrs_size influences downstream sizes without strong validation.",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "params memref (caller-provided shared buffer) is passed into entry_set_attribute_value and used to build attribute templates; origin is REE-visible.",
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    }
  ]
}
フロー #74: TA_InvokeCommandEntryPoint -> entry_copy_object -> object_is_token -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectobject_is_tokenget_boolget_attributeTEE_MemMove

実行時間: 44.58秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks in get_attribute prevent overflow for TEE_MemMove at line 187 and the destination is TEE-private, so no unencrypted REE output occurs; the primary remaining issue is caller-side handling of non-OK rc.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (caller buffer)",
        "rhs": "src (attr_ptr) copied of length n via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "dest (cli_head)",
        "rhs": "cur (serialized stream) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-220"
      },
      {
        "lhs": "dest (&pkcs11_ref)",
        "rhs": "ref_attr copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:263-265"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest 'attr' is caller stack (&bbool) (TA-private) written by TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: src 'attr_ptr' originates from get_attribute_ptr (obj attributes, TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination 'attr' is a TA-local buffer (&bbool) and get_attribute enforces attr_size >= size (returns BUFFER_TOO_SMALL) before copying; both src and dst are TEE-private, so no REE exfiltration.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "obj->attributes (TA-private) via get_attribute_ptr",
      "propagation_path": [
        "obj->attributes -> attr_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "attr_ptr -> TEE_MemMove(dest=attr,&src=attr_ptr,size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187",
        "&bbool dest in get_bool <- copied value @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:233-239"
      ],
      "sink": "TEE_MemMove into TA-local buffer (get_attribute:attr)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker-controlled REE cannot directly alter TA-private obj->attributes",
        "malformed serialized attributes could cause larger size returned by get_attribute_ptr"
      ],
      "attack_scenario": "If get_attribute_ptr reported a size larger than caller-provided attr_size, get_attribute returns BUFFER_TOO_SMALL preventing the copy; no direct path to overwrite TA stack via this TEE_MemMove call exists due to size check.",
      "impact": "Low — potential logic failure if caller doesn't handle BUFFER_TOO_SMALL, but not an immediate memory corruption or REE exfiltration at this line."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_bool:235-246",
        "recommendation": "Handle non-OK rc (e.g., PKCS11_CKR_BUFFER_TOO_SMALL) from get_attribute explicitly instead of asserting, to avoid unexpected aborts."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "get_attribute performs explicit buffer-size check before copying (lines 180-184)",
        "destination is a small TA-local buffer (&bbool), not REE-visible"
      ],
      "negative_indicators": [
        "caller get_bool does not handle BUFFER_TOO_SMALL return (assert assumes OK), which is a residual robustness risk"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks in get_attribute prevent overflow for TEE_MemMove at line 187 and the destination is TEE-private, so no unencrypted REE output occurs; the primary remaining issue is caller-side handling of non-OK rc.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The TEE_MemMove at line 187 copies into a TA-private buffer with an explicit size check in get_attribute preventing overflow; the copy does not target REE-visible memory so it is not an unencrypted output.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "get_attribute:176-178",
      "evidence": "propagates rc from get_attribute_ptr and returns on error"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "Caller provides buffer size via attr_size and get_attribute checks attr_size >= size before copying",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "attr_ptr originates from get_attribute_ptr over TA-private obj attributes; copy length controlled by returned size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177"
    }
  ],
  "residual_risks": [
    "line 187: caller (get_bool) asserts on non-OK rc from get_attribute rather than handling BUFFER_TOO_SMALL, which can cause aborts or denial-of-service"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit buffer-size check in get_attribute before TEE_MemMove",
      "Destination is TA-private stack variable (&bbool)"
    ],
    "negative_indicators": [
      "get_bool does not gracefully handle BUFFER_TOO_SMALL (uses assert), lowering robustness"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The sink is memory-safe and confined to TA-private memory; no evidence of sensitive TA-private data being written to REE at this line. Therefore not a vulnerability for information disclosure or overflow at this call.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(uint8_t),src_sz=unknown,dst_sz=sizeof(uint8_t)"
        ]
      },
      "why": "get_bool initializes a small caller buffer and calls get_attribute which may return BUFFER_TOO_SMALL; caller asserts on non-OK rc instead of handling it.",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}
フロー #75: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> object_is_modifiable -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueobject_is_modifiableget_boolget_attributeTEE_MemMove

実行時間: 45.66秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 187 is guarded by a preceding size check that returns BUFFER_TOO_SMALL when the destination is too small, and the destination is TA-private (no REE-visible write), so no direct memory-safety or sensitive REE disclosure occurs at this call site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (attr_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "memory at dest",
        "rhs": "memory at src (copied n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination 'attr' is a caller-local buffer; TEE_MemMove will write up to 'size' bytes into it based on attr_ptr-derived size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source 'attr_ptr' derives from get_attribute_ptr(head, ...); provenance of attr_ptr depends on head (caller-controlled), may be TA-private or unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove at this site copies from attr_ptr to a local caller buffer 'attr' but caller-provided attr_size is checked against size and function returns PKCS11_CKR_BUFFER_TOO_SMALL when too small, preventing an unchecked write here in normal paths; destination is TA-private, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "The copy at line 187 is guarded by a preceding size check that returns BUFFER_TOO_SMALL when the destination is too small, and the destination is TA-private (no REE-visible write), so no direct memory-safety or sensitive REE disclosure occurs at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "entry_set_attribute_value:989-991",
      "evidence": "ptypes must match expected exp_pt or function returns PKCS11_CKR_ARGUMENTS_BAD"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "Caller supplies buffer and attr_size; get_attribute enforces size check before copying",
      "evidence": "attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "Resolved via get_attribute_ptr from TA-side attributes; provenance typically TA-private or from parsed template allocated in TA",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "line 187: get_attribute may return PKCS11_CKR_BUFFER_TOO_SMALL to caller; callers (e.g., get_bool) assert rc==OK which could cause an assertion failure/crash if BUFFER_TOO_SMALL propagates"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check in get_attribute prevents copy when destination buffer too small",
      "Destination of copy is TA-private local buffer (&bbool) in get_bool, not REE-visible"
    ],
    "negative_indicators": [
      "get_bool asserts rc==PKCS11_CKR_OK and would not handle PKCS11_CKR_BUFFER_TOO_SMALL gracefully, which can lead to a crash (availability issue)",
      "Provenance of attr_ptr depends on head/template which may originate from REE-parsed data"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety protections (size check returning BUFFER_TOO_SMALL) prevent an unchecked write at the TEE_MemMove site; no evidence that sensitive TA-private data is being copied to REE at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "Caller-provided serialized template (from REE memref) is parsed/allocated and its attrs_size drives allocations and subsequent attribute accesses; insufficient validation of template contents can allow malformed sizes.",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "TEE_MemMove copies up to 'size' bytes from attr_ptr into caller buffer 'attr'; although bounds-checked, attr_ptr provenance depends on head which may be derived from REE-parsed template.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 235,
      "function": "get_bool",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "why": "get_bool asserts rc == PKCS11_CKR_OK after get_attribute; if get_attribute returns BUFFER_TOO_SMALL the assert can trigger, causing an availability issue.",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size); if (rc == PKCS11_RV_NOT_FOUND) return false; assert(rc == PKCS11_CKR_OK);"
    }
  ]
}
フロー #76: TA_InvokeCommandEntryPoint -> entry_copy_object -> object_is_copyable -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectobject_is_copyableget_boolget_attributeTEE_MemMove

実行時間: 64.94秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The local bounds check in get_attribute prevents overflow at this call-site and data remains TA-private; conditions for unencrypted_output are not met.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer passed into TEE_MemMove",
        "site": "caller: various (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187)"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer passed into TEE_MemMove",
        "site": "caller: various (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187)"
      },
      {
        "lhs": "n",
        "rhs": "size argument determining number of bytes to copy (caller-controlled expressions)",
        "site": "caller: various (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187)"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers often perform size checks (e.g., attr_size vs size) before invoking TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies size bytes from attr_ptr (TA-private attribute storage) into attr (caller stack buffer) — dest and src are TA-private but size is caller-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized header from cur (likely serialized REE/TA source) into local cli_head; origin of cur may be shared or internal depending on parsing path.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Generic pattern: copying into caller-provided buffers can move TA-private or REE-originating data depending on call-site; sizes may be derived from untrusted sources at some sites.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(dest, src, n);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller provides attr_size initialized to sizeof(bbool); get_attribute checks attr_size < size and returns PKCS11_CKR_BUFFER_TOO_SMALL before calling TEE_MemMove, preventing overflow and the copy stays within TA-private memory.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TA-private attribute storage (attr_ptr) from get_attribute_ptr",
      "propagation_path": [
        "obj->attributes -> get_attribute_ptr(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "get_attribute(...) copies to &bbool via TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187",
        "get_bool(...) returns bbool to callers (e.g., object_is_copyable) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:233-244"
      ],
      "sink": "TEE_MemMove writing into caller stack buffer &bbool"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled modification of attribute storage content or sizes (requires other vulnerabilities)"
      ],
      "attack_scenario": "If size checks were bypassed, a large attribute size could cause an overflow when copying into a too-small caller buffer.",
      "impact": "Potential memory corruption within TA (denial of service or code execution) if bounds checks missing; not an REE disclosure here."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure all call sites supply accurate attr_size and treat unexpected sizes defensively; consider explicit max-size checks for known callers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit buffer-size check in get_attribute prevents copying when dst size < src size",
        "Caller initialized attr_size to sizeof(bbool)"
      ],
      "negative_indicators": [
        "If other callers pass incorrect attr_size, different call-sites might trigger copies with larger sizes"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The local bounds check in get_attribute prevents overflow at this call-site and data remains TA-private; conditions for unencrypted_output are not met.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces attr_size comparison and returns without copying when destination is too small; copied data remains TA-private, not REE-visible.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "assertion",
      "location": "get_bool:244",
      "evidence": "assert(rc == PKCS11_CKR_OK) ensures bbool valid before return"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "size checked via attr_size before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "obtained from get_attribute_ptr with rc checked before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "Other call-sites that call get_attribute with incorrect attr_size may still enable unsafe copies",
    "Copies from TA-private to REE-visible buffers at other lines (e.g., 1237, 366) remain structural risks for information exposure"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check present at the function that performs the copy",
      "Call-site (get_bool) initializes attr_size to sizeof(bbool)"
    ],
    "negative_indicators": [
      "Some TEE_MemMove uses elsewhere copy into REE-visible buffers (contextual risk, but not at line 187)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 187 is protected by an explicit size comparison that prevents copying when destination buffer is too small; the copy targets TA-private memory, so neither memory-safety nor information-disclosure conditions are met here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); potential information flow to REE though obj_handle is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer (REE-visible); structural info flow to REE (rc is public/non-sensitive).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #77: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_token -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_tokenget_boolget_attributeTEE_MemMove

実行時間: 36.42秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: A bounds check for attr_size versus required size prevents overruns and the destination is TA-private, so the copy at this line is not exploitable as written.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src via TEE_MemMove(dest, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "size info influences copy",
        "rhs": "n parameter (caller-controlled at call sites)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller checks attr_size against size and may return BUFFER_TOO_SMALL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of destination pointer 'attr' (caller buffer &bbool) into memmove; destination origin is caller stack (TA-private) but caller-provided size may be smaller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size /* initially sizeof(bbool) */"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of source pointer 'attr_ptr' into memmove; origin determined by get_attribute_ptr and may be REE-derived or TA-owned (ambiguous).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes without additional runtime sanitizer here; relies on caller to have validated attr_size vs size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller-provided attr_size is checked against required size and function returns BUFFER_TOO_SMALL before the TEE_MemMove; destination is TA-private stack (&bbool) and not REE-visible, so no unencrypted REE output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "A bounds check for attr_size versus required size prevents overruns and the destination is TA-private, so the copy at this line is not exploitable as written.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest, &bbool)",
      "why_safe": "caller-provided stack buffer sized to sizeof(bbool) and checked via attr_size",
      "evidence": "attributes.c:237-241"
    },
    {
      "arg": "attr_size (&size)",
      "why_safe": "initialized to sizeof(bbool) and used in bounds check before copy",
      "evidence": "attributes.c:237-241,180-184"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "origin ambiguous; copy guarded by size but origin trust depends on get_attribute_ptr validation",
      "evidence": "attributes.c:176-178,186-187"
    }
  ],
  "residual_risks": [
    "attr_ptr origin ambiguous: if get_attribute_ptr returns REE-derived data and later that data is copied to REE-visible buffers elsewhere, information exposure could occur"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check preventing copy when destination size is too small",
      "Destination in this call is a TA-private stack variable (&bbool)"
    ],
    "negative_indicators": [
      "Source pointer attr_ptr origin is unknown/ambiguous (could be REE-derived)",
      "Higher-level attribute parsing relies on prior validation; an upstream bug could affect attr_ptr/size"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety check (attr_size vs size) prevents overflow and destination is TA-private; no evidence that sensitive TA-private data is being copied to REE at this line, so mark safe while noting upstream/source ambiguity as residual risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 176,
      "function": "get_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "get_attribute relies on get_attribute_ptr to provide attr_ptr and size; attr_ptr origin is ambiguous and upstream validation is required.",
      "code_excerpt": "rc = get_attribute_ptr(head, attribute, &attr_ptr, &size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_bool",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=1,src_sz=unknown,dst_sz=1"
        ]
      },
      "why": "get_bool asserts rc == OK after get_attribute; malformed attributes could trigger assert or unexpected behavior if upstream checks fail.",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}
フロー #78: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_token -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_tokenget_boolget_attributeTEE_MemMove

実行時間: 58.03秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: The memcpy at line 187 is protected by a bounds check that compares the caller-provided attr_size against the attribute size and returns BUFFER_TOO_SMALL before copying; the destination is a TA-private local buffer, so no unencrypted REE output occurs here.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "attr",
      "attr_ptr",
      "size",
      "cur",
      "prefix",
      "prefix2",
      "pre",
      "ref",
      "pkcs11_ref",
      "cli_head",
      "pkcs11_ref.size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "source buffer copied into dst via TEE_MemMove(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "cli_head",
        "rhs": "bytes from cur copied into &cli_head via TEE_MemMove(&cli_head, cur, sizeof(cli_head))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-220"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "bytes from ref_attr/cur copied into &pkcs11_ref via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:263-266,350-353"
      },
      {
        "lhs": "prefix2",
        "rhs": "bytes from prefix copied into prefix2 via TEE_MemMove(prefix2, prefix, prefix_len + 1)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:342-345"
      },
      {
        "lhs": "pre",
        "rhs": "bytes from prefix copied into pre via TEE_MemMove(pre, prefix, strlen(prefix))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:445-447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "get_attribute checks attr_size < size and returns BUFFER_TOO_SMALL before MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr into caller buffer attr; source may originate from object attributes derived from REE-provided templates",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized header bytes from cur (possibly REE-provided serial buffer) into local cli_head via fixed-size memcpy",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies ref metadata from ref_attr into local pkcs11_ref; source may be untrusted serialized data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies ref metadata from ref_attr into local pkcs11_ref at alternate codepath; source provenance may be REE-visible",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 using prefix_len+1 as length; length derived earlier and used without further upper-bound here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref header from cur into local struct, then copies following bytes into small local buffer using MIN(pkcs11_ref.size, sizeof(data)) — header-driven length used to bound second copy",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies payload bytes (cur + sizeof(pkcs11_ref)) into small local buffer using MIN(pkcs11_ref.size, sizeof(data)) to limit copy",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies header 'head' from ref into local head via fixed-size MemMove; source ref may be untrusted",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer using strlen(prefix) as length; length computed from prefix which may be unbounded relative to pre",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination buffer (&bbool) size initialized to sizeof(bbool) and get_attribute checks *attr_size < size and returns BUFFER_TOO_SMALL before MemMove, preventing overflow; destination is TA-private.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The memcpy at line 187 is protected by a bounds check that compares the caller-provided attr_size against the attribute size and returns BUFFER_TOO_SMALL before copying; the destination is a TA-private local buffer, so no unencrypted REE output occurs here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "null_check",
      "location": "get_attribute:176-178",
      "evidence": "rc = get_attribute_ptr(...); if (rc) return rc;"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (destination)",
      "why_safe": "caller supplies buffer &bbool with attr_size initialized to sizeof(bbool); get_attribute enforces size check before copy",
      "evidence": "attributes.c:237-241"
    },
    {
      "arg": "attr_size",
      "why_safe": "used as length hint and updated on BUFFER_TOO_SMALL, preventing out-of-bounds copy",
      "evidence": "attributes.c:180-190"
    }
  ],
  "residual_risks": [
    "Source attr_ptr may originate from object attributes that were derived from REE-provided templates earlier; although not a leak here, upstream malformed serialized inputs could influence sizes/contents."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size check before MemMove at get_attribute",
      "Destination in this callsite is a fixed-size TA-local buffer (&bbool)"
    ],
    "negative_indicators": [
      "attr_ptr source provenance can be REE-visible (untrusted) in some paths",
      "Some other MemMove sites copy untrusted data into TA structures and later into REE-visible buffers"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety (bounds check) prevents overflow at this sink and the destination is TA-private, so no information disclosure or overwrite vulnerability is present at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive in context",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #79: TA_InvokeCommandEntryPoint -> entry_create_object -> check_created_attrs_against_token -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectcheck_created_attrs_against_tokenget_boolget_attributeTEE_MemMove

実行時間: 42.06秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: Destination is TA-private at this call-site and get_attribute enforces a size check (returns BUFFER_TOO_SMALL) before copying, so no tainted-to-REE sensitive copy or unchecked overflow occurs here.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer at call-site (attr_ptr/cur/ref/etc.)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187,220,265,298,344,352,353,435,447"
      },
      {
        "lhs": "n",
        "rhs": "size argument passed by callers (size, sizeof(...), strlen(prefix), MIN(...))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187,220,265,298,344,352,353,435,447"
      }
    ],
    "sanitizers": [
      {
        "kind": "caller_bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "callers often check buffer size (attr_size vs size) before invoking TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' is caller-provided buffer (here &bbool) — region is TEE-private stack at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'attr_ptr' originates from get_attribute_ptr and may reference data derived from REE input (processed into TA memory) — record as unknown/TEE-private origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Performs raw memory copy of 'size' bytes; if destination in other call-sites is REE-visible, this becomes TA->REE copy and may expose TA-held data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(caller_provided)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "At this call-site destination 'attr' is a TA-private local (&bbool) and callers perform a bounds check (attr_size vs size) before invoking the copy, preventing overflow; no REE-visible destination on this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "Destination is TA-private at this call-site and get_attribute enforces a size check (returns BUFFER_TOO_SMALL) before copying, so no tainted-to-REE sensitive copy or unchecked overflow occurs here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "existence_check",
      "location": "get_bool:241-245",
      "evidence": "if get_attribute returns PKCS11_RV_NOT_FOUND return false; assert(rc == PKCS11_CKR_OK)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "caller passes address of local &bbool (TEE-private) sized sizeof(uint8_t)",
      "evidence": "attributes.c:237-239"
    },
    {
      "arg": "attr_size",
      "why_safe": "initialized to sizeof(bbool) so get_attribute can detect and report BUFFER_TOO_SMALL",
      "evidence": "attributes.c:237-241"
    }
  ],
  "residual_risks": [
    "Other call-sites of TEE_MemMove in this module copy into caller-provided buffers that may be REE-visible (e.g., entry_create_object -> out->memref.buffer at object.c:390); those lines remain structural risks for potential TA->REE disclosure.",
    "If assertions are disabled, get_bool's assert(rc == PKCS11_CKR_OK) could allow unexpected paths — defensive error handling would be preferable."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size/bounds check in get_attribute before copying",
      "Destination at this call-site is a TA-private local (&bbool)"
    ],
    "negative_indicators": [
      "Some upstream data in 'head' originates from REE and influences decisions (authorization), but not a direct leak at this line",
      "assert present instead of explicit runtime error handling (behavior differs if asserts disabled)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks at and before this call prevent overflow, and the destination here is not REE-visible, so this specific TEE_MemMove invocation is not a vulnerable sink; related structural risks elsewhere are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle (TA-private) into caller-provided out->memref.buffer (REE-visible), exposing TA-created handle to REE.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1588,
      "function": "check_created_attrs_against_token",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Decisions rely on attributes in 'head' (possibly derived from REE input) with limited authorization checks, which could allow privilege misassignment.",
      "code_excerpt": "if (get_bool(head, PKCS11_CKA_TRUSTED) && !pkcs11_session_is_so(session))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "why": "Raw memory copy of 'size' bytes; when callers pass REE-visible buffers this becomes a TA->REE copy and may expose TA data.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #80: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_parent_attrs_against_processing -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keycheck_parent_attrs_against_processingget_boolget_attributeTEE_MemMove

実行時間: 50.35秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Bounds check in get_attribute prevents copying when caller buffer is too small; here get_bool provides a 1-byte buffer and get_attribute will return BUFFER_TOO_SMALL instead of copying if attribute size >1, so the specific TEE_MemMove at line 187 is not vulnerable.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (memory copy source)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "dest",
        "rhs": "src (memory copy source)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "dest",
        "rhs": "src (memory copy source)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "dest",
        "rhs": "src (memory copy source)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest 'attr' is caller buffer (e.g., &bbool in get_bool) and src 'attr_ptr' is attribute storage pointer; copies size bytes from attr_ptr into attr.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size or size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest '&cli_head' is local stack, src 'cur' is buffer parsed from serialized input (caller-controlled); copies fixed sizeof(cli_head).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest 'prefix2' is TA buffer, src 'prefix' may be caller or TA data; copies prefix_len+1 bytes without additional runtime bound here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dest 'pre' may be TA buffer, src 'prefix' origin unclear (could be caller-provided); copies strlen(prefix) bytes which is caller-controlled length.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute checks caller buffer size (returns PKCS11_CKR_BUFFER_TOO_SMALL if *attr_size < size) so TEE_MemMove only runs when dest buffer is large enough; source is TA-private attribute storage and destination in this call (get_bool) is a local TA buffer (bbool), not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attr_ptr (object attribute storage, TA-private)",
      "propagation_path": [
        "get_attribute_ptr(...) -> attr_ptr/size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-178",
        "get_attribute: TEE_MemMove(attr, attr_ptr, size) @ ...:187",
        "get_bool: returns bbool from local buffer @ ...:233-246",
        "check_parent_attrs_against_processing uses get_bool result @ ...:1928"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) writes into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker must control obj attribute storage or get_attribute_ptr return",
        "caller supplies attr_size pointer and attr buffer"
      ],
      "attack_scenario": "If get_attribute_ptr were subverted to return a larger size and a src pointer pointing to attacker-controlled memory, TEE_MemMove could copy unexpected bytes into caller buffer, but get_attribute enforces size checking and returns BUFFER_TOO_SMALL instead of copying.",
      "impact": "Potential memory corruption or incorrect attribute decisions if checks absent; in current code impact is low due to size check."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure get_attribute_ptr guarantees attr_ptr/size integrity; consider validating attr_ptr resides in expected TEE-private structures."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size comparison and early return at get_attribute if dest too small",
        "assert(rc == PKCS11_CKR_OK) after get_attribute in get_bool"
      ],
      "negative_indicators": [
        "get_attribute_ptr implementation not shown here; if it can be manipulated it may affect behavior",
        "some callers pass buffers derived from REE-controlled serialized input elsewhere"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Bounds check in get_attribute prevents copying when caller buffer is too small; here get_bool provides a 1-byte buffer and get_attribute will return BUFFER_TOO_SMALL instead of copying if attribute size >1, so the specific TEE_MemMove at line 187 is not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "get_attribute enforces attr_size checks and only performs TEE_MemMove when dest buffer is large enough; the specific call copies TA-private attribute into a TA-local buffer.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "assert",
      "location": "get_bool:244",
      "evidence": "assert(rc == PKCS11_CKR_OK)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "Only written when provided buffer size >= attribute size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_size",
      "why_safe": "Used to detect insufficient buffer and cause early return",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184"
    }
  ],
  "residual_risks": [
    "line 1266: wrap_data_by_symm_enc writes TA-private key_data into params[2].memref.buffer (REE-visible) without a strong upper-bound check; could result in secret disclosure if params[2] is REE-shared and not properly bounded"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size check before copy",
      "Local uses (get_bool) use small fixed buffer and rely on checked behavior"
    ],
    "negative_indicators": [
      "get_attribute_ptr implementation not inspected here",
      "Other TEE_MemMove calls copy from REE-visible buffers elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The memory-safety sanitizer (size check) prevents overflow and prevents copying when dest too small; no evidence of TA-private secret being copied to REE at this specific sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) using out_size derived from params[2].memref.size without an effective upper bound check; key_data is TA-private secret being written to shared memory.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #81: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_secret_key -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_secret_keyget_boolget_attributeTEE_MemMove

実行時間: 65.35秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst (memory)",
        "rhs": "data copied from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "cli_head (stack)",
        "rhs": "bytes copied from cur via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-220"
      },
      {
        "lhs": "data[]",
        "rhs": "bytes copied from cur + sizeof(pkcs11_ref) via TEE_MemMove with MIN(pkcs11_ref.size, sizeof(data))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352-354"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "caller checks *attr_size < size and returns PKCS11_CKR_BUFFER_TOO_SMALL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from attr_ptr into attr; size originates from get_attribute_ptr and may reflect untrusted/unknown provenance without stronger validation of attr_ptr",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(cli_head) from cur into stack cli_head where cur is derived from head (which may be REE-supplied); relies on surrounding loop bounds to be correct",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref structure from ref_attr into local pkcs11_ref; origin of ref_attr is context-dependent (unknown)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur into local data[] using size derived from parsed pkcs11_ref; if pkcs11_ref was attacker-controlled this may under/over-run without extra checks",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=end - (cur + sizeof(pkcs11_ref)),dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into pre using strlen(prefix) as length; origin of prefix may be untrusted and dst buffer pre provenance/size not shown here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Caller provided attr_size (initialized to sizeof(bbool)); get_attribute checks *attr_size < size and returns PKCS11_CKR_BUFFER_TOO_SMALL, so TEE_MemMove only executes when size <= provided buffer (bounds check present).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "high"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A bounds check in get_attribute prevents copying more bytes than the caller buffer size (attr_size), and in this call site the caller supplies a 1-byte buffer with its size checked.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller-provided small buffer with size checked before copy",
      "evidence": "attributes.c:237-241, attributes.c:180-187"
    },
    {
      "arg": "attr_size (&size)",
      "why_safe": "used in bounds check before TEE_MemMove",
      "evidence": "attributes.c:180-184"
    }
  ],
  "residual_risks": [
    "Other call-sites perform TEE_MemMove using lengths derived from untrusted templates (e.g., MIN(pkcs11_ref.size, sizeof(data)) and copying cli_head from cur) where upstream validation is weaker."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check in get_attribute prevents overflow at this call site",
      "attr_size initialized to sizeof(bbool) immediately before call"
    ],
    "negative_indicators": [
      "attr_ptr provenance may be from REE-derived head, but that affects content not buffer bounds here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 187 performs a memory copy guarded by an explicit size check comparing caller buffer size to the attribute size; caller provides a single-byte buffer and the check prevents the copy when size exceeds that, so no vulnerable copy occurs at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "get_attribute / check loop",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies attribute header from cur (derived from head which may be REE-supplied) relying on loop bounds; insufficient per-item validation of cli_ref.size before using it to advance len.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "get_attribute / parsing",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=end - (cur + sizeof(pkcs11_ref)),dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies data with length derived from parsed pkcs11_ref.size; if pkcs11_ref is attacker-controlled this may lead to incorrect assumptions about available source bytes.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "some helper",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies prefix using strlen(prefix) into pre where pre buffer provenance/size is not shown here.",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:size)"
        ]
      },
      "why": "General copy site where size is derived from get_attribute_ptr; callers must supply correct attr_size to avoid buffer issues.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #82: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_secret_key -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_secret_keyget_boolget_attributeTEE_MemMove

実行時間: 75.04秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The immediate sink at line 187 is protected by get_attribute's size check which prevents copying more bytes than the caller allocated; destination is TA-local and not REE-visible, so no unencrypted_output applies.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst (written)",
        "rhs": "src (read) copied n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "cli_head (written)",
        "rhs": "cur (read) copied sizeof(cli_head) bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-220"
      },
      {
        "lhs": "pkcs11_ref (written)",
        "rhs": "ref_attr (read) copied sizeof(pkcs11_ref) bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:263-265"
      },
      {
        "lhs": "prefix2 (written)",
        "rhs": "prefix (read) copied prefix_len + 1 bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:342-344"
      },
      {
        "lhs": "data / &data[0] (written)",
        "rhs": "cur + sizeof(pkcs11_ref) (read) copied MIN(pkcs11_ref.size, sizeof(data)) bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:351-354"
      },
      {
        "lhs": "head (written)",
        "rhs": "ref (read) copied sizeof(head) bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:433-435"
      },
      {
        "lhs": "pre (written)",
        "rhs": "prefix (read) copied strlen(prefix) bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:445-447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dst (&bbool) is caller-local TA buffer, src (attr_ptr) originates from attribute storage (TA-private) returned by get_attribute_ptr",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(cli_head) from cur which is derived from head buffer (client-supplied); cli_head.size later used without separate validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr (parsed data); subsequent use of pkcs11_ref.size may be attacker-controlled if not validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into prefix2; both likely TA-local but length expression (prefix_len + 1) must be correct to avoid overflow",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=prefix_len + 1,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+offset into local buffer; pkcs11_ref.size comes from parsed input and must be trusted elsewhere",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head from ref; origin of ref may be external and head.attrs_count used later—binding reflects potential external influence",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre; prefix may be caller-controlled and length computed by strlen(prefix) should be validated against pre buffer size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copy length 'size' is validated against caller-provided *attr_size earlier in get_attribute (returns BUFFER_TOO_SMALL if insufficient), and in this invocation get_bool sets attr_size to sizeof(bbool) so destination is bounded and local (TA-private).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-supplied attribute list (head) possibly from REE",
      "propagation_path": [
        "head (REE-visible/unknown) -> get_attribute_ptr -> attr_ptr @ attributes.c:176",
        "attr_ptr -> get_attribute -> TEE_MemMove(attr, attr_ptr, size) @ attributes.c:186-187",
        "attr is &bbool in get_bool (TA-local) @ attributes.c:235-239"
      ],
      "sink": "TEE_MemMove into TA-local buffer (&bbool) at attributes.c:187"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed attribute metadata in head allowing manipulated size/ptr from get_attribute_ptr",
        "Absence of earlier bounds checks between get_attribute_ptr and final copy"
      ],
      "attack_scenario": "If get_attribute_ptr returned a size larger than caller buffer and get_attribute did not enforce or return error, an overread/overflow could occur; however get_attribute enforces and returns BUFFER_TOO_SMALL so exploitation at this line is blocked.",
      "impact": "Potential memory corruption or information disclosure if bounds checks were missing; not applicable here due to existing check."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_attribute_ptr:unknown",
        "recommendation": "Ensure get_attribute_ptr validates attribute id and reported size against head->attrs_size and remaining buffer before returning attr_ptr/size."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check in get_attribute that compares *attr_size and size (attributes.c:180-184).",
        "get_bool provides small local buffer size (sizeof(bbool))."
      ],
      "negative_indicators": [
        "get_attribute_ptr implementation not shown here; if it returns incorrect size/ptr, upstream risk remains.",
        "Some parsing paths use sizes derived from untrusted cli_ref.size elsewhere."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The immediate sink at line 187 is protected by get_attribute's size check which prevents copying more bytes than the caller allocated; destination is TA-local and not REE-visible, so no unencrypted_output applies.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Bounds check in get_attribute prevents buffer overflow at this call-site and destination is TA-private, so the copy is not an information‑disclosure to REE.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "Caller supplies attr_size = sizeof(bbool) and get_attribute enforces *attr_size >= size before copying",
      "evidence": "attributes.c:237-241,180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "Pointer originates from get_attribute_ptr which should validate within head; however its correctness is not shown and is a residual risk",
      "evidence": "attributes.c:176"
    }
  ],
  "residual_risks": [
    "get_attribute_ptr may return attr_ptr/size derived from untrusted head; parsing of cli_ref.size elsewhere lacks explicit extra validation (weak_input_validation at attributes.c:218-221)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size check in get_attribute prevents overflow at copy",
      "Destination buffer is TA-local and small (bbool), minimizing disclosure risk"
    ],
    "negative_indicators": [
      "get_attribute_ptr implementation not inspected here; could supply incorrect size/ptr if flawed",
      "Other code paths parse untrusted sizes (cli_ref.size) and use them without additional checks"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the explicit bounds check in get_attribute and the TA-local destination, the TEE_MemMove at line 187 is not a vulnerability; remaining concerns are structural (parsing and sources) but do not make this sink vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 218,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Parses cli_head from client-supplied buffer and later uses cli_head.size without separate validation in this function.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies bytes using pkcs11_ref.size derived from parsed input; size origin must be validated.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out buffer (REE-visible); out->memref.size was validated earlier to equal sizeof(obj_handle).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #83: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_private_key -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_private_keyget_boolget_attributeTEE_MemMove

実行時間: 64.37秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety check (attr_size >= size) at get_attribute prevents overflow at this TEE_MemMove site; remaining concerns are structural (untrusted size/ptr provenance) but do not make this sink line vulnerable.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied len bytes) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "cli_head",
        "rhs": "cur (bytes at cur copied into cli_head) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-220"
      },
      {
        "lhs": "&pkcs11_ref, &data[0]",
        "rhs": "cur and cur+sizeof(pkcs11_ref) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:351-354"
      },
      {
        "lhs": "prefix2",
        "rhs": "prefix copied len+1 bytes via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:342-344"
      },
      {
        "lhs": "head",
        "rhs": "ref copied into head via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:433-435"
      },
      {
        "lhs": "pre",
        "rhs": "prefix copied into pre via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:446-447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from attr_ptr (origin from get_attribute_ptr) into caller buffer attr relying on size without revalidating attr_ptr provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "reads header from cur into cli_head using sizeof(cli_head) where cur is derived from head (which may be REE-supplied); size field subsequently used to advance loop",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies pkcs11_ref and up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur into local structures relying on pkcs11_ref.size parsed from untrusted data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix (REE-provided) into prefix2 buffer using prefix_len+1 without explicit destination-size check here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=prefix_len+1,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies ref into head structure; origin of ref may be external and head used afterwards without additional validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=sizeof(head),dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix into pre buffer using strlen(prefix) where prefix may be REE-supplied; destination size not evident here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute only executes TEE_MemMove(attr, attr_ptr, size) after verifying provided attr_size >= size (returns BUFFER_TOO_SMALL otherwise), preventing overflow into attr (caller bbool).",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-supplied attribute storage (head) possibly derived from REE",
      "propagation_path": [
        "params[memref.buffer] -> template -> head (object attributes) @ object.c:1002,1047",
        "head -> cur -> cli_ref via TEE_MemMove @ pkcs11_attributes.c:2380",
        "get_attribute_ptr(head, attribute, &attr_ptr, &size) -> attr_ptr,size @ attributes.c:176",
        "TEE_MemMove(attr, attr_ptr, size) @ attributes.c:186-187"
      ],
      "sink": "TEE_MemMove copies 'size' bytes from attr_ptr into caller buffer attr (bbool)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "maliciously crafted head/template from REE controlling attr_ptr and size",
        "absence or bypass of get_attribute_ptr or its returned size correctness"
      ],
      "attack_scenario": "If get_attribute_ptr returned a size larger than caller-provided attr_size and the earlier size check were absent or bypassed, an attacker-controlled large size could cause an overflow into TA memory.",
      "impact": "Memory corruption within TA (low to high depending on overwritten data), possible crash or code execution in worst case."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute:get_attribute_ptr:176-178",
        "recommendation": "Validate attr_ptr points inside trusted TA-owned storage or copy from REE only into known-size buffers after additional validation; fail safely if provenance uncertain."
      },
      {
        "type": "bounds_check",
        "location": "get_attribute:180-184",
        "recommendation": "Handle PKCS11_CKR_BUFFER_TOO_SMALL return without relying on assert; propagate error robustly to callers instead of asserting."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check in get_attribute prevents copy when caller buffer too small (evidence lines 180-184).",
        "TEE_MemMove is only executed after get_attribute returns OK."
      ],
      "negative_indicators": [
        "get_attribute_ptr provenance of attr_ptr is not validated here; upstream head may be REE-derived.",
        "Some upstream parsing uses lengths from untrusted data (cli_ref.size) to advance loops."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety check (attr_size >= size) at get_attribute prevents overflow at this TEE_MemMove site; remaining concerns are structural (untrusted size/ptr provenance) but do not make this sink line vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The sink is preceded by an explicit size comparison that prevents copying more bytes than the caller buffer can hold; therefore no direct vulnerability at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "caller-provided small buffer checked against size before copy",
      "evidence": "attributes.c:176-184,186-188"
    },
    {
      "arg": "attr_ptr (source)",
      "why_safe": "used only after get_attribute_ptr returned OK, but provenance not fully validated",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "Upstream parsing copies (TEE_MemMove at pkcs11_attributes.c:218-220,352) consume lengths from untrusted data (cli_ref.size, pkcs11_ref.size) and could corrupt internal structures if malicious; these are structural risks not reaching this sink line.",
    "get_attribute_ptr returns attr_ptr and size without validating attr_ptr provenance; copy uses that size after a compare, but trust in get_attribute_ptr remains a residual risk."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit buffer-size check before copy at get_attribute.",
      "TEE_MemMove copy target is a small fixed-size stack buffer (bbool)."
    ],
    "negative_indicators": [
      "Multiple upstream uses of untrusted lengths to compute offsets/loop increments.",
      "get_attribute_ptr implementation not shown; its correctness is assumed."
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The critical memory-safety protection exists at the get_attribute boundary; therefore the specific TEE_MemMove at line 187 is not vulnerable, although related upstream parsing and untrusted-pointer provenance remain structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 220,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Reads attribute header from untrusted cur and uses cli_head.size to advance parsing loop without stronger validation.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 352,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies data from cur using pkcs11_ref.size (untrusted) even though bounded by MIN(), reliance on parsed size may be risky.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "some_helper",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=prefix_len+1,dst_sz=unknown"
        ]
      },
      "why": "Copies prefix into local buffer without visible destination-size check here.",
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "get_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=head->attrs_size,dst_sz=sizeof(bbool)"
        ]
      },
      "why": "Relies on get_attribute_ptr to return a correct attr_ptr and size; get_attribute copies from attr_ptr based on that size.",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}
フロー #84: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_private_key -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_private_keyget_boolget_attributeTEE_MemMove

実行時間: 73.28秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The immediate sink at line 187 is protected by a prior bounds check that returns BUFFER_TOO_SMALL if the source size exceeds the caller's buffer size (sizeof bbool), preventing overflow; thus not vulnerable at this line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      },
      {
        "lhs": "memory at dest",
        "rhs": "memory at src copied for n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest is caller stack buffer (&bbool, TA-local) while src attr_ptr provenance comes from get_attribute_ptr (may be REE-influenced); copy length 'size' derived from metadata",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from 'cur' (parsed from head buffer) into local cli_head using fixed sizeof(cli_head) without validating remaining bytes against cli_head.size first",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 with length prefix_len+1 where prefix may originate from earlier data; destination is TA buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix_len+1+4"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from cur into local structure without validating that cur+sizeof(pkcs11_ref) is within bounds",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'head' struct from ref (source unknown) into local head; origin of ref may be REE-influenced and head used to drive loops",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre for logging; source prefix may be caller-controlled leading to potential oversized copy if prefix length miscomputed",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute verifies requested size against caller-provided attr_size (initialized to sizeof(bbool)) and returns BUFFER_TOO_SMALL before the TEE_MemMove, preventing overflow of local bbool buffer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-supplied attributes blob (head) possibly REE-originated",
      "propagation_path": [
        "head (REE-influenced) -> get_attribute_ptr -> attr_ptr,size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "get_attribute(head, attribute, &bbool, &size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:239",
        "TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      ],
      "sink": "TEE_MemMove copies size bytes into local bbool buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "A malformed attributes blob causes get_attribute_ptr to report a size value"
      ],
      "attack_scenario": "If get_attribute did not perform the size check, an attacker-controlled size could overflow the local buffer leading to memory corruption; however current checks prevent the copy when size > provided buffer.",
      "impact": "Potential memory corruption or crash if size check absent; with current check impact reduced to rejection or error path."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure callers handle PKCS11_CKR_BUFFER_TOO_SMALL robustly and avoid assuming success; propagate failures without asserts."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptr:176|get_attribute:176",
        "recommendation": "Validate attr_ptr and size provenance tightly (e.g., bounds relative to head->attrs_size) before using size for copies."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check in get_attribute prevents TEE_MemMove when dest is too small"
      ],
      "negative_indicators": [
        "get_attribute_ptr provenance and size computation rely on earlier parsing; malformed inputs might trigger other code paths",
        "Other callers sometimes pass head derived from REE without additional validation"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The immediate sink at line 187 is protected by a prior bounds check that returns BUFFER_TOO_SMALL if the source size exceeds the caller's buffer size (sizeof bbool), preventing overflow; thus not vulnerable at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A bounds check in get_attribute prevents copying more bytes than the destination bbool buffer can hold.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool)",
      "why_safe": "Destination size initialized to sizeof(bbool) and compared against source size before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:237-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "Value read via get_attribute_ptr; copy guarded by size check but provenance of attr_ptr should be validated upstream",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-187"
    }
  ],
  "residual_risks": [
    "line 187: upstream get_attribute_ptr or parsing may produce unexpected size values leading to non-OK rc (e.g., BUFFER_TOO_SMALL) which callers sometimes assert on, causing potential crashes (denial of service)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check before TEE_MemMove",
      "Local destination buffer size known at call site"
    ],
    "negative_indicators": [
      "Provenance of attr_ptr/size depends on earlier parsing of REE-supplied data",
      "Some call sites assert on rc, which may cause denial if unexpected rc returned"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence applied: bounds check prevents overflow at this sink; remaining concerns are structural (input validation/parsing) and do not make the sink itself vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Parses client-supplied attribute entries and copies header without validating cli_ref.size against remaining buffer before using it as a bound.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size?*attr_size:unknown"
        ]
      },
      "why": "Copies 'size' bytes from attr_ptr into caller buffer; size is derived from metadata and relies on get_attribute_ptr correctness.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out memref; out is REE-visible but obj_handle is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #85: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableget_boolget_attributeTEE_MemMove

実行時間: 60.33秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The local pre-copy size check prevents overflow at this callsite (get_bool provides a valid attr_size), so the specific line is not vulnerable; however, similar copy patterns elsewhere warrant caution.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer (varies by callsite)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<callsite>"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (varies by callsite)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<callsite>"
      },
      {
        "lhs": "n",
        "rhs": "size argument (may be derived from parsed/REE-supplied values)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:<callsite>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (obtained from get_attribute_ptr, potentially REE-derived) into caller buffer 'attr' relying on earlier check; if attr_size was NULL or check bypassed, destination may be undersized.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size_or_unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(cli_head) bytes from cur (derived from head, which may be REE-supplied) into local cli_head without additional per-field validation beyond loop bounds.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into stack buffer 'data'; pkcs11_ref.size is derived from parsed REE data and could be manipulated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies strlen(prefix) bytes from prefix (caller-provided) into pre without ensuring pre has adequate size; origin of prefix may be REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "At this callsite get_attribute only reaches TEE_MemMove after checking attr_size against size (lines 180-184); in the caller (get_bool) attr_size is provided as sizeof(bbool) so copy occurs only when destination is large enough.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-supplied attribute storage (head) via get_attribute_ptr",
      "propagation_path": [
        "head (REE-origin) -> get_attribute_ptr -> attr_ptr,size @ attributes.c:176-178",
        "size checked against *attr_size @ attributes.c:180-184",
        "TEE_MemMove(attr, attr_ptr, size) @ attributes.c:186-187"
      ],
      "sink": "TEE_MemMove copying into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "caller provides attr_size pointer that is NULL or smaller than needed (not the case in get_bool)",
        "get_attribute_ptr returns a larger size than the provided *attr_size"
      ],
      "attack_scenario": "If a caller passed attr_size==NULL or an undersized buffer and code path bypassed the size check, an attacker-controlled attribute could cause an overflow during the copy.",
      "impact": "Potential memory corruption in TA (denial or code execution) if unchecked copies occur in other callsites."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-187",
        "recommendation": "Require non-NULL attr_size for any non-NULL attr or perform explicit explicit dst-size validation before copying; fail safely if attr_size is NULL."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check present immediately before the copy",
        "Caller get_bool supplies attr_size initialized to sizeof(bbool)"
      ],
      "negative_indicators": [
        "Other callsites call TEE_MemMove with sizes derived from parsed data (e.g., MIN(pkcs11_ref.size, sizeof(data))) indicating varied patterns",
        "Some callsites copy based on strlen or parsed sizes where destination sizing isn't obviously checked"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The local pre-copy size check prevents overflow at this callsite (get_bool provides a valid attr_size), so the specific line is not vulnerable; however, similar copy patterns elsewhere warrant caution.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A concrete bounds check (attr_size vs size) guards the copy and the examined caller provides a matching attr_size, preventing unsafe copy at line 187.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dst)",
      "why_safe": "Caller (get_bool) supplies a stack buffer and attr_size initialized to sizeof(bbool); get_attribute enforces bounds before copying",
      "evidence": "attributes.c:237-241, attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "Obtained via get_attribute_ptr which returns size; subsequent size check protects dst",
      "evidence": "attributes.c:176-184"
    }
  ],
  "residual_risks": [
    "Other callsites use TEE_MemMove with sizes derived from REE-parsed fields (e.g., cli_ref.size, strlen(prefix)) that may lack per-callsite explicit dst-size checks.",
    "If callers pass attr_size==NULL with a non-NULL attr, the current check cannot prevent overflow."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct presence of pre-copy bounds check",
      "Caller supplies explicit attr_size"
    ],
    "negative_indicators": [
      "Multiple similar copy patterns elsewhere with varying validation rigor"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 187 is guarded by a prior buffer-size check and the immediate caller provides a matching size, so no vulnerability is reported for this sink line; structural issues elsewhere remain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating that sizeof(cli_ref)+cli_ref.size stays within end",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove (callsite)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "Copies bytes based on parsed pkcs11_ref.size (from REE) into a fixed stack buffer; though MIN is used, pkcs11_ref parsing must be robust to avoid misinterpretation.",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove (callsite)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies prefix bytes into pre using strlen(prefix) without clear bounds on pre's size at this callsite.",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #86: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableget_boolget_attributeTEE_MemMove

実行時間: 50.28秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest[0..len-1]",
        "rhs": "src[0..len-1] copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' is caller-owned buffer (&bbool) in TA stack/local",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from attr_ptr (origin resolved by get_attribute_ptr) into dest; src provenance and size bounds rely on upstream checks",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&cli_head' is local stack structure receiving bytes from 'cur' (parsed input)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding (representative): copying local handle into caller-visible out buffer in object.c uses TEE_MemMove to write into REE-visible memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute checks *attr_size < size and returns BUFFER_TOO_SMALL before performing TEE_MemMove, preventing an out-of-bounds copy into the caller's 1-byte buffer; therefore the direct copy at this line is guarded.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "high"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A bounds check in get_attribute prevents TEE_MemMove from copying more bytes than the caller-provided buffer size; thus the specific sink call at line 187 is not reachable with an overflow.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (dest)",
      "why_safe": "caller provides buffer size via attr_size which is checked before copy",
      "evidence": "attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (src)",
      "why_safe": "origin resolved by get_attribute_ptr; copy guarded by size check though provenance may be untrusted",
      "evidence": "attributes.c:176-187"
    }
  ],
  "residual_risks": [
    "assertion failure in get_bool when get_attribute returns BUFFER_TOO_SMALL (may lead to TA abort) at attributes.c:244",
    "upstream parsing of attribute headers (TEE_MemMove of cli_head) uses untrusted sizes; inadequate validation there is a structural risk"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit bounds check and early return in get_attribute before TEE_MemMove",
      "TEE_MemMove only executed when get_attribute returns OK"
    ],
    "negative_indicators": [
      "some callers pass 'head' derived from REE; upstream parsing uses sizes from untrusted buffers",
      "callers (get_bool) assert rc==OK and do not handle BUFFER_TOO_SMALL which may cause abort"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The copy at line 187 is protected by a prior size check in get_attribute which returns without copying when the destination is too small; therefore no overflow at this sink. However, upstream untrusted sizes and callers not handling BUFFER_TOO_SMALL are structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Parses client-supplied attribute headers using cli_ref.size from untrusted buffer without validating that cli_ref.size fits remaining bytes.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "get_attribute relies on get_attribute_ptr to provide attr_ptr and size; if get_attribute_ptr returns size larger than expected and callers don't handle BUFFER_TOO_SMALL, logic errors may occur.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #87: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationget_boolget_attributeTEE_MemMove

実行時間: 69.72秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: The explicit size check in get_attribute prevents copying more bytes than the caller buffer (get_bool's sizeof(bbool)), mitigating an over-read/overflow at this call-site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "attr",
      "attr_ptr",
      "cur",
      "cli_head",
      "pkcs11_ref",
      "prefix",
      "prefix2",
      "data",
      "head",
      "ref",
      "pre"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "generic:TEE_MemMove"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "generic:TEE_MemMove"
      },
      {
        "lhs": "n",
        "rhs": "caller-provided copy length",
        "site": "generic:TEE_MemMove"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from attr_ptr (derived from head, possibly REE-supplied) into caller buffer attr; size originates from get_attribute_ptr and may be attacker-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies attribute header from cur (within head derived from REE) into local cli_head and uses returned cli_head.size to advance parsing without extra validation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies fixed-size pkcs11_ref from ref_attr into local structure; both are TA-managed in this path",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies fixed-size pkcs11_ref from ref_attr into local structure before lookup; origin likely TA-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=sizeof(pkcs11_ref),dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies prefix (src) into prefix2 using prefix_len derived earlier; if prefix originates from REE, length/contents may be untrusted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=prefix_len + 1,dst_sz=prefix_len + 1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "reads pkcs11_ref header from cur (parsing REE-derived blob) into local pkcs11_ref; subsequent use of pkcs11_ref.size influences other copies",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into local data; size derived from REE-parsed header",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies head structure from ref into local head; both are likely TA-managed at this call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=sizeof(head),dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies prefix into pre using strlen(prefix) bytes; if prefix pointer originates from REE, length and contents are attacker-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute checks attr_size and returns PKCS11_CKR_BUFFER_TOO_SMALL before copying when requested buffer is smaller, and get_bool passes sizeof(bbool) so oversized source avoids the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The explicit size check in get_attribute prevents copying more bytes than the caller buffer (get_bool's sizeof(bbool)), mitigating an over-read/overflow at this call-site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool in get_bool)",
      "why_safe": "caller-provided buffer is size-checked via attr_size mechanism",
      "evidence": "attributes.c:237-187"
    },
    {
      "arg": "attr_ptr (source)",
      "why_safe": "validated via get_attribute_ptr earlier; get_attribute enforces size check before copying",
      "evidence": "attributes.c:176-184"
    }
  ],
  "residual_risks": [
    "Parsing of attribute lists uses lengths from REE-derived blobs (cli_ref.size/template->attrs_size) to drive further copies; these parsing steps show weak_input_validation risks elsewhere.",
    "Head/template values originating from REE are used to compute template_size and loop bounds; malformed values could trigger other logic bugs even if this copy is protected."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct explicit bounds check in get_attribute that prevents copy when caller buffer smaller",
      "get_bool initializes size to sizeof(bbool) so small local buffer is guarded"
    ],
    "negative_indicators": [
      "Upstream parsing uses REE-derived sizes (cli_ref.size, template->attrs_size) with only limited validation, creating structural risks elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety check in get_attribute directly prevents an unsafe copy at line 187; although upstream parsing exhibits weak validation, this specific sink is defended by the attr_size check.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "reads attribute header from REE-derived blob and uses cli_ref.size to advance parsing without fully validating total length",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "copies data governed by pkcs11_ref.size parsed from REE blob; parsing-bound size may be attacker-controlled",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "allocates and builds template from REE-provided serialargs; template->attrs_size influences allocations and later parsing",
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    }
  ]
}
フロー #88: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> get_bool -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationget_boolget_attributeTEE_MemMove

実行時間: 52.94秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: The memmove itself is protected by an explicit attr_size vs size check, preventing overflow; however, upstream handling of non-OK return codes (BUFFER_TOO_SMALL) is weak (assert), so the defect is weak input validation / crash risk, not a direct memory-safety overflow or unencrypted REE output.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "destination pointer passed to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "src",
        "rhs": "source pointer passed to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "memory at dest",
        "rhs": "memory at src copied for n bytes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Performs raw copy from src to dest using size 'size' without validating provenance of src/size beyond upstream checks; if src or size are attacker-controlled this can copy unexpected data or overflow caller buffers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'attr' aliases caller stack buffer (&bbool) which is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'attr_ptr' may point into data derived from 'head' (which can be REE-originated), so src region is unknown/possibly REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=head->attrs_size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute checks attr_size against attribute size and returns BUFFER_TOO_SMALL before performing TEE_MemMove when provided attr_size is too small, preventing overflow; source may be REE-derived but destination is TA-private.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "Client-provided attribute template (head) derived from REE",
      "propagation_path": [
        "params.ctrl->memref.buffer -> serialargs -> template/head @ object.c:1108-1118",
        "head -> check_attrs_against_modification cur loop reading cli_ref via TEE_MemMove @ pkcs11_attributes.c:2380-2381",
        "get_attribute(head, ...) -> get_attribute_ptr(...) -> attr_ptr,size -> get_attribute TEE_MemMove(attr, attr_ptr, size) @ attributes.c:176-187"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) copies attribute into TA-local buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted attribute template in params ctrl memref",
        "Attribute size larger than caller-provided attr_size (e.g., sizeof(bbool))"
      ],
      "attack_scenario": "A malformed attribute size can cause get_attribute to return BUFFER_TOO_SMALL which is not handled by the caller (get_bool asserts), leading to assertion failure/crash rather than controlled overwrite.",
      "impact": "Denial of Service (assert/crash) rather than confidential data leakage or buffer overflow in this path"
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "attributes.c:239-245",
        "recommendation": "Handle PKCS11_CKR_BUFFER_TOO_SMALL return from get_attribute gracefully instead of asserting; explicitly check rc values and avoid assert on caller-supplied data."
      },
      {
        "type": "bounds_check",
        "location": "pkcs11_attributes.c:2380-2381",
        "recommendation": "Validate cli_ref.size against remaining bytes before computing len and using it to bound parsing."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "get_attribute performs attr_size check before memmove, preventing overflow",
        "destination buffer (&bbool) size is supplied and enforced"
      ],
      "negative_indicators": [
        "Caller (get_bool) asserts rc == OK and does not handle BUFFER_TOO_SMALL, enabling possible crash",
        "Some source regions remain unknown (attr_ptr provenance) though likely REE-derived"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove itself is protected by an explicit attr_size vs size check, preventing overflow; however, upstream handling of non-OK return codes (BUFFER_TOO_SMALL) is weak (assert), so the defect is weak input validation / crash risk, not a direct memory-safety overflow or unencrypted REE output.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A bounds check in get_attribute prevents performing the memmove when the destination capacity is too small, so no overflow or data leak to REE at this sink line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "attributes.c:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "object.c:1104-1106",
      "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr",
      "why_safe": "destination buffer size is supplied and checked via attr_size before memmove",
      "evidence": "attributes.c:180-187"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "source pointer obtained via get_attribute_ptr; memmove only performed after size checks",
      "evidence": "attributes.c:176-187"
    }
  ],
  "residual_risks": [
    "line 187: upstream lack of graceful handling for PKCS11_CKR_BUFFER_TOO_SMALL (assert in get_bool) can cause crash/DoS",
    "parsing of attribute list in pkcs11_attributes.c uses cli_ref.size without strict validation against remaining bytes (potential read/logic issues)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size check in get_attribute prevents memmove when buffer too small"
    ],
    "negative_indicators": [
      "Assert usage in callers (get_bool) can turn BUFFER_TOO_SMALL into a crash",
      "Some source provenance labels are unknown"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety protections exist at the memmove site, preventing overflow. The remaining issues are weak input validation and improper error handling leading to potential DoS, which are structural risks rather than a vulnerable sink copy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Parses client-supplied attribute entries using cli_ref.size without validating it against remaining bytes before using it to advance the cursor.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 239,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "Copies attribute bytes from attr_ptr into caller buffer; relies on upstream checks and callers to handle BUFFER_TOO_SMALL, but some callers assert on non-OK rc.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 241,
      "function": "get_bool",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(bbool),src_sz=size,dst_sz=sizeof(bbool)"
        ]
      },
      "why": "get_bool asserts rc == PKCS11_CKR_OK after calling get_attribute; if get_attribute returns BUFFER_TOO_SMALL an assert can crash (DoS).",
      "code_excerpt": "rc = get_attribute(head, attribute, &bbool, &size);"
    }
  ]
}
フロー #89: TA_InvokeCommandEntryPoint -> entry_generate_secret -> check_created_attrs_against_processing -> check_attr_bval -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretcheck_created_attrs_against_processingcheck_attr_bvalget_attributeTEE_MemMove

実行時間: 71.08秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

安全判定理由: Buffer-size checks in get_attribute (compare attr_size to size and return PKCS11_CKR_BUFFER_TOO_SMALL) prevent overflow at this call; destination in the examined call is a TA-local buffer, not REE-visible sensitive output.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "source bytes copied from src",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      },
      {
        "lhs": "local structures (e.g., cli_head, pkcs11_ref, head)",
        "rhs": "copied from serial buffer pointers (cur/ref/prefix) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:218-221,263-266,296-299,350-354,433-436"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "higher-level code checks sizes (e.g., buffer-too-small) before some copies"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes from attr_ptr (sourced from parsed attributes) into caller buffer 'attr'; source likely originates from REE-parsed data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Parses client attribute header by copying from serial buffer 'cur' into local cli_head; 'cur' originates from REE-provided serial data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header from ref_attr (parsed data) into local pkcs11_ref; ref_attr is from REE-origin serial buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies referenced attribute header from ref_attr into pkcs11_ref for subsequent get_attribute_ptr; source likely REE-origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes into local prefix2 buffer from 'prefix' source; origin of 'prefix' may be caller/REE-provided.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix_len+1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from buffer 'cur' into local structure; 'cur' is parsed serial data (REE-origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies a small data fragment from serial buffer into local array 'data'; source originates from REE-provided serial stream.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head structure from ref pointer into local 'head'; ref likely points into REE-origin serialized attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into 'pre' buffer using strlen(prefix); destination 'pre' origin/size not validated here — potential unsafe write if pre not sized.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove performs raw memory copy using caller-provided size 'size' without validating attr_ptr provenance or ensuring dest buffer capacity here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "get_attribute ensures size from get_attribute_ptr and checks caller-provided attr_size against size, returning BUFFER_TOO_SMALL when insufficient; here attr is caller stack/local (&bbool) with attr_size initialized to sizeof(bbool).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Buffer-size checks in get_attribute (compare attr_size to size and return PKCS11_CKR_BUFFER_TOO_SMALL) prevent overflow at this call; destination in the examined call is a TA-local buffer, not REE-visible sensitive output.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "check_created_attrs_against_processing:1653-1661",
      "evidence": "asserts validate attributes/type (may be compiled out)"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (&bbool) at callsite check_attr_bval:1622-1624",
      "why_safe": "attr_size initialized to sizeof(bbool) and checked by get_attribute",
      "evidence": "pkcs11_attributes.c:1621-1625"
    },
    {
      "arg": "attr_ptr (source)",
      "why_safe": "sourced via get_attribute_ptr whose return is checked before copy",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "assert-based validation in downstream functions may be compiled out, weakening checks",
    "some TEE_MemMove uses copy into buffers with unknown destination size (e.g., pre) — those are structural risks outside this sink line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size check and early return on PKCS11_CKR_BUFFER_TOO_SMALL in get_attribute",
      "attr_size set to sizeof(bbool) at caller before call"
    ],
    "negative_indicators": [
      "Some validation relies on assert() which may be disabled in production builds",
      "attr_ptr provenance (source region) is unknown in this function and ultimately traces to REE-parsed data"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety sanitizer (bounds check on attr_size) directly protects this TEE_MemMove call; destination is TA-local in the examined callsite so no unencrypted REE output occurs here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1653,
      "function": "check_created_attrs_against_processing",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Uses assert() to validate attributes and types; if asserts are disabled this can skip validation of REE-provided attributes.",
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "attributes parsing",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "why": "Copies prefix into buffer 'pre' using strlen(prefix) without validating destination size here.",
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}
フロー #90: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> check_created_attrs_against_processing -> check_attr_bval -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_paircheck_created_attrs_against_processingcheck_attr_bvalget_attributeTEE_MemMove

実行時間: 62.82秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

信頼度: LOW

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187 and various callsites"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (attr_ptr/cur/ref/etc.)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-177 and various callsites"
      },
      {
        "lhs": "n",
        "rhs": "size parameter computed by caller (size, sizeof(...), strlen(prefix), MIN(...), etc.)",
        "site": "multiple callsites (see structural_risks entries)"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-184",
        "evidence": "Callers sometimes check buffer sizes (attr_size check) before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "attr (caller buffer) is destination for copy from attr_ptr which was obtained from head derived from REE templates; alias binds caller dest to origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies serialized attribute header from cur into local cli_head; dest is local stack, src is parsed buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference attribute into pkcs11_ref from ref_attr; source originates from parsed data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference attribute into pkcs11_ref from ref_attr (similar parsing path)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2; destination is caller buffer and sized by caller, then modified; potential overwrite if sizes incorrect",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=prefix_len + 1,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from cur into local structure and then copies following bytes into local data array; sources from parsed buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload into local data buffer using MIN(pkcs11_ref.size, sizeof(data)); size is attacker-controlled via parsed ref",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head from ref into local head variable; ref originates from parsed attribute list",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer for logging; if prefix is attacker-controlled this could lead to unexpected logging content or overflow if pre is undersized",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=strlen(prefix),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Generic memory copy can write into REE-visible buffers if callers pass shared memrefs as dest; potential shared-memory overwrite depending on caller context",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies from attr_ptr into caller-supplied attr; callers observed in context pass TEE-private locals (e.g., &bbool) and a bounds check on attr_size is performed before the copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "low"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "At this sink, callers use local TEE-private buffers and get_attribute enforces a size check (returns BUFFER_TOO_SMALL) before copying, preventing overflow or REE leakage in observed callsites.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (destination)",
      "why_safe": "Callers pass local variables (&bbool, &boolval, &key_length) rather than REE memrefs in observed contexts",
      "evidence": "processing.c:1622-1624,2132-2136,2456-2457"
    },
    {
      "arg": "attr_ptr (source)",
      "why_safe": "attr_ptr obtained from get_attribute_ptr reading internal attribute storage (TEE-private) in observed flows",
      "evidence": "attributes.c:176-178"
    }
  ],
  "residual_risks": [
    "If a caller were to pass a REE-visible memref directly as attr, the copy would write into shared memory—this usage was not observed at the analyzed callsites."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit attr_size bounds check in get_attribute",
      "callers in context pass local stack variables as destination buffers"
    ],
    "negative_indicators": [
      "general-purpose API can copy into caller-provided buffers; other callsites may pass different buffers",
      "attr_ptr/size values originate from parsed templates derived from REE, so malformed inputs could influence behavior elsewhere"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The specific sink at line 187 is covered by an explicit size check and, in observed call paths, destination buffers are TEE-private locals; therefore there is no demonstrated vulnerability at this line. Structural risks elsewhere (e.g., assertions on untrusted data, copies into REE-visible memrefs at other sites) remain and are reported below.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "why": "Copies attribute bytes from attr_ptr into caller buffer attr via TEE_MemMove; if caller supplies a REE-visible destination this writes into shared memory.",
      "code_excerpt": "if (attr) TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); destination is shared even though handles are non-sensitive.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1653,
      "function": "check_created_attrs_against_processing",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Uses assert(check_attr_bval(...)) on attributes derived from untrusted templates; assertion may cause panic on malformed input.",
      "code_excerpt": "assert(check_attr_bval(proc_id, head, PKCS11_CKA_LOCAL, false));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1669,
      "function": "check_created_attrs_against_processing",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Asserts key-type via get_key_type(head) where head is derived from untrusted templates; malformed attrs could disrupt processing.",
      "code_excerpt": "assert(get_key_type(head) == PKCS11_CKK_EC);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 186,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=attr_size ? *attr_size : unknown"
        ]
      },
      "why": "Generic memory copy can write into REE-visible buffers if callers pass shared memrefs as dest; potential shared-memory overwrite depending on caller context.",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #91: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> attribute_is_exportable -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueattribute_is_exportableget_attributeTEE_MemMove

実行時間: 46.67秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: get_attribute performs a bounds check on attr_size and callers initialize attr_size to the destination size (e.g., sizeof(boolval)), preventing overflow or unintended REE exposure at this TEE_MemMove call.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copy n bytes)",
        "site": "abstract:TEE_MemMove(...)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'attr' is caller-supplied buffer (often TA-local like &boolval) receiving bytes from attr_ptr which may originate from object attributes; alias/binding recorded.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from 'cur' (pointer into template buffer allocated from serial args which is derived from REE data) into local cli_head; source may contain REE-derived content.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=template->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix (source possibly caller-provided or from serial data) into prefix2 buffer; length calculation uses prefix_len which may be influenced by input.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix_len+1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'prefix' into 'pre'; source 'prefix' may be external/REE-derived and is used untrusted in logging path.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is a TA-local destination (e.g., &boolval) and callers set attr_size to sizeof(boolval) before call; get_attribute enforces size check and returns BUFFER_TOO_SMALL when *attr_size < size, preventing overflow/exposure at this callsite.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "obj->attributes (TA-side)",
      "propagation_path": [
        "obj->attributes -> get_attribute_ptr(... ) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "attr_ptr -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      ],
      "sink": "TEE_MemMove to TA-local buffer (attr)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Caller provides attr_size smaller than actual attribute size and attr is non-NULL",
        "get_attribute_ptr returns a size larger than attr_size and copy proceeds without earlier check (not the case here)"
      ],
      "attack_scenario": "Not applicable given existing size check; would require bypassing attr_size check or corrupted control flow.",
      "impact": "Potential memory corruption or disclosure if checks absent; not applicable here."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "get_attribute:180-184",
        "recommendation": "Ensure callers always initialize attr_size to intended destination capacity and consider explicit runtime assertion for attr != NULL when attr_size indicates data will be copied."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check in get_attribute that returns BUFFER_TOO_SMALL when *attr_size < size",
        "Callers in attribute_is_exportable set boolsize = sizeof(boolval) prior to calling get_attribute"
      ],
      "negative_indicators": [
        "Origin of attr_ptr can vary; if attr_ptr were derived from REE without further checks at other callsites it could be sensitive in other paths (but not this line)",
        "Some template buffers originate from serialargs (REE) elsewhere in codebase (structural risk)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "get_attribute performs a bounds check on attr_size and callers initialize attr_size to the destination size (e.g., sizeof(boolval)), preventing overflow or unintended REE exposure at this TEE_MemMove call.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 187 writes into a TA-local buffer with prior size checks; attr_size is set by callers to the destination capacity and get_attribute returns BUFFER_TOO_SMALL if insufficient.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "attribute_is_exportable:2133-2143",
      "evidence": "callers set boolsize = sizeof(boolval) before invoking get_attribute"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr",
      "why_safe": "Caller-provided destination initialized, expected size matches attr_size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2133-2136"
    },
    {
      "arg": "attr_size",
      "why_safe": "Set by caller to sizeof(boolval) before call; used for bounds check in callee",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2133-2134"
    }
  ],
  "residual_risks": [
    "Line 910 (TEE_MemMove out->memref.buffer, template) copies TA-side template into REE-visible buffer; sensitivity of attributes and export gating should be re-verified (structural risk reported below)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check prevents copy when destination is too small",
      "Callers initialize sizes to match local destination"
    ],
    "negative_indicators": [
      "attr_ptr origin varies across code; other callsites may copy REE-derived data to REE"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks in get_attribute and size initialization by callers preclude a vulnerable copy at line 187; therefore no vulnerability at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into REE-visible params[0].memref.buffer; destination is shared with REE (caller).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies template (attributes) into out->memref.buffer (REE-visible); attributes may include sensitive flags/values if export gating fails.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=template->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies attribute header from template (which may be derived from REE-serialized data) into local cli_head; template provenance includes REE-provided serial buffer.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    }
  ]
}
フロー #92: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_certificate -> get_attribute -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_certificateget_attributeTEE_MemMove

実行時間: 84.97秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-120

深刻度: MEDIUM

テイントフロー:

ソース: attr_ptr (derived from get_attribute_ptr(head, attribute) which may reference parsed attributes/head from REE-derived data)

シンク: TEE_MemMove(attr, attr_ptr, size) copies into caller buffer 'attr' without guaranteed bounds when attr_size is NULL or inconsistent

判定理由: The sink performs an unconditional copy of 'size' bytes when attr is non-NULL; although a bounds-check exists when attr_size is provided, callers may pass NULL attr_size or mismatched sizes making the check ineffective—this is a weak input validation that can lead to overflow/overread.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copy of n bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "&cli_head",
        "rhs": "cur (bytes copied into cli_head)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "&pkcs11_ref",
        "rhs": "ref_attr (bytes copied into pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      },
      {
        "lhs": "&pkcs11_ref",
        "rhs": "ref_attr (bytes copied into pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:298"
      },
      {
        "lhs": "prefix2",
        "rhs": "prefix",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "&pkcs11_ref",
        "rhs": "cur",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352"
      },
      {
        "lhs": "&data[0]",
        "rhs": "cur + sizeof(pkcs11_ref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353"
      },
      {
        "lhs": "&head",
        "rhs": "ref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      },
      {
        "lhs": "pre",
        "rhs": "prefix",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:2376",
        "evidence": "loop uses cur < end as bound (helps prevent overread when cur derived from head->attrs_size)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies size bytes from attr_ptr (TA-internal) into caller-supplied attr buffer; binding dest to caller-local buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies sizeof(cli_head) from cur (derived from head which may be REE-supplied) into local cli_head",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end - cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies sizeof(pkcs11_ref) from ref_attr into local pkcs11_ref; ref_attr provenance may be REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies sizeof(pkcs11_ref) from ref_attr into pkcs11_ref at another call site; binding shows ref_attr origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies prefix_len+1 bytes from prefix into prefix2 (both likely TA buffers); shows direct buffer copy with computed length",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix_len+1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies sizeof(pkcs11_ref) from cur into local pkcs11_ref; cur originates from parsed head (possibly REE)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end - cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies MIN(pkcs11_ref.size, sizeof(data)) bytes from cur+sizeof(pkcs11_ref) into data; pkcs11_ref.size is derived from parsed input and may be attacker-controlled if not fully validated",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies sizeof(head) from ref into head (binding of destination to local head from ref source)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies strlen(prefix) bytes into pre (pre may be TA buffer but prefix provenance could be REE); binds prefix source to destination pre",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove copies 'size' bytes from attr_ptr into caller-supplied dest 'attr' at line 187; caller-provided attr_size check only prevents copy when attr_size is provided and too small—if attr_size is NULL or inconsistent, no bounds check prevents overflow/overread.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-120",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "attr_ptr (derived from get_attribute_ptr(head, attribute) which may reference parsed attributes/head from REE-derived data)",
      "propagation_path": [
        "params (caller memref) -> template/head -> head passed into get_attribute_ptr @ object.c:1002/1047",
        "get_attribute_ptr results attr_ptr,size -> get_attribute copies via TEE_MemMove(attr, attr_ptr, size) @ attributes.c:187"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) copies into caller buffer 'attr' without guaranteed bounds when attr_size is NULL or inconsistent"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker can control or craft object attribute data referenced by head/get_attribute_ptr such that reported size is larger than destination buffer or attr_size is NULL.",
        "Caller passes a non-NULL attr pointer without a matching attr_size or with attr_size < size but code path does not return early."
      ],
      "attack_scenario": "Maliciously crafted attributes cause get_attribute to copy more bytes than the destination buffer holds, leading to memory corruption inside the TA.",
      "impact": "Memory corruption in TA (crash, code execution, or data corruption), potential compromise of TA integrity."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_attribute:180-187",
        "recommendation": "Require caller to supply a valid attr_size and always validate dest buffer length against 'size' before calling TEE_MemMove; if attr_size is NULL, refuse or use a safe maximum."
      },
      {
        "type": "type_validation",
        "location": "get_attribute_ptr:unknown",
        "recommendation": "Ensure get_attribute_ptr validates that returned attr_ptr and size are consistent and within expected object bounds."
      },
      {
        "type": "mem_access_check",
        "location": "call sites of get_attribute:various",
        "recommendation": "Callers should initialize and provide attr_size reflecting the actual destination capacity or handle BUFFER_TOO_SMALL return code safely before using buffers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy of 'size' bytes into caller buffer at line 187",
        "Existing check only triggers if attr_size is provided and smaller; code path allows copy when attr_size is NULL"
      ],
      "negative_indicators": [
        "Many call sites provide attr_size and check return codes (BUFFER_TOO_SMALL) before using data (e.g., attr_is_modifiable_certificate uses boolsize initialized to 0 causing early return)",
        "In several code paths callers pass proper attr_size and react to BUFFER_TOO_SMALL"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The sink performs an unconditional copy of 'size' bytes when attr is non-NULL; although a bounds-check exists when attr_size is provided, callers may pass NULL attr_size or mismatched sizes making the check ineffective—this is a weak input validation that can lead to overflow/overread.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 187,
        "function": "get_attribute",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(attr, attr_ptr, size) can copy more bytes than destination 'attr' when attr_size is NULL or not validated against 'size'."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr_size",
      "why_safe": "When provided and set to actual destination capacity, prevents copy by returning BUFFER_TOO_SMALL",
      "evidence": "get_attribute:180-184"
    },
    {
      "arg": "attr",
      "why_safe": "Safe when caller supplied buffer size via attr_size matches or exceeds 'size'",
      "evidence": "callers that initialize and check attr_size handle BUFFER_TOO_SMALL (e.g., some call sites)"
    }
  ],
  "residual_risks": [
    "line 187 memory-safety finding suppresses but does not eliminate possible information disclosure if later copies place TA-private sensitive data into REE-visible buffers"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct unconditional copy of attacker-influenced length",
      "Multiple call sites where attr_size may be NULL or inconsistent"
    ],
    "negative_indicators": [
      "Several call sites supply and check attr_size causing early return (reduces exploitable surface)",
      "Some upstream validation loops exist (cur<end) which limit some overreads"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety weakness (insufficient validation of destination buffer length) at the copy site constitutes a valid vulnerability risk; while some call sites mitigate by providing attr_size, the function allows unsafe usage patterns (attr_size NULL or mismatched) that enable exploitation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "reads attribute header from cur (derived from head which is REE-supplied) and uses cli_ref.size to advance len without fully validating bounds against end",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove (caller context)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "why": "copies MIN(pkcs11_ref.size, sizeof(data)) bytes where pkcs11_ref.size is attacker-controlled if parsed input not validated",
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "why": "copies 'size' bytes into attr without guaranteed destination bounds when attr_size is NULL or mismatched",
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    }
  ]
}
フロー #93: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> attribute_is_modifiable -> attr_is_modifiable_certificate -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationattribute_is_modifiableattr_is_modifiable_certificateget_attributeTEE_MemMove

実行時間: 80.29秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Copy at line 187 transfers TA-private data into a TA-local buffer and is guarded by a size-check in get_attribute; no evidence of REE-visible sink or missing sanitizer at this program point.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copy of len bytes)",
        "site": "TEE_MemMove:call-sites listed in /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute payload from attr_ptr (TA-private attribute storage) into caller buffer 'attr' (TA-local); correctness depends on get_attribute_ptr validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=(attr_size?*attr_size:unknown)"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads cli_head from cur which points into parsed attribute buffer (originates from caller-supplied head/template)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr (pointer into parsed data) into local pkcs11_ref; source likely from parsed/REE-provided buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref from ref_attr into local structure before using it to index attributes; relies on validity of ref_attr/size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix bytes within TA-local buffers (prefix2 <- prefix); uses prefix_len+1 as length, bounds depend on prefix_len correctness",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies pkcs11_ref header from cur (parsed buffer) into local pkcs11_ref; source cur originates from parsed/REE buffer",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies small data fragment from parsed buffer (cur + sizeof(pkcs11_ref)) into local 'data' array using MIN(pkcs11_ref.size, sizeof(data))",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'head' structure from ref into local head variable; correctness depends on validity of ref and size of head",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer before logging; prefix provenance uncertain (could be caller-provided), bounds depend on strlen(prefix)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "At this call the copy moves data from TA-private attr_ptr into a TA-local destination; get_attribute enforces a buffer-size check that prevents blind overwrites and, in the observed call-site (boolval/boolsize), returns BUFFER_TOO_SMALL rather than copying into an undersized buffer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attr_ptr from get_attribute_ptr (derived from head/object attributes)",
      "propagation_path": [
        "obj->attributes -> get_attribute_ptr -> attr_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176",
        "TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      ],
      "sink": "TEE_MemMove copying into TA-local buffer 'attr'"
    },
    "exploitation_analysis": {
      "preconditions": [
        "An attacker would need to cause attr_ptr to reference secret TA-private data and arrange a caller-provided attr/attr_size to accept the copy into REE-visible memory (not the case at this site)."
      ],
      "attack_scenario": "Not applicable for this call-site because destination is TA-local and size checks are in place.",
      "impact": "None at this sink line (TA-local copy)."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes.c:176-184",
        "recommendation": "Ensure get_attribute_ptr validates attr_ptr/size against head->attrs_size and callers initialize attr_size to actual buffer capacity where appropriate."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "get_attribute enforces attr_size vs size check and returns BUFFER_TOO_SMALL if inadequate",
        "destination of copy at this site is TA-local variable (not REE-visible)"
      ],
      "negative_indicators": [
        "get_attribute_ptr validation responsibilities are external to this function (assumes correctness)",
        "other call-sites may pass REE-originated heads where attr_ptr could point into untrusted data"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Copy at line 187 transfers TA-private data into a TA-local buffer and is guarded by a size-check in get_attribute; no evidence of REE-visible sink or missing sanitizer at this program point.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The move at line 187 copies into TA-local storage and is protected by get_attribute's buffer-size check; no sensitive TA-private data is being copied to REE here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "attributes.c:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr",
      "why_safe": "destination is TA-local stack variable in the observed call; copy only occurs when attr_size indicates sufficient space",
      "evidence": "attributes.c:186-190"
    },
    {
      "arg": "attr_ptr",
      "why_safe": "originates from get_attribute_ptr reading from object attributes (TA-private) in this call-site",
      "evidence": "attributes.c:176"
    }
  ],
  "residual_risks": [
    "line 187: dependent on correctness of get_attribute_ptr validation of attr_ptr/size",
    "higher-level parsing functions (parsing REE-supplied templates) perform TEE_MemMove from untrusted memory into local structures with limited validation (weak_input_validation)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit size check in get_attribute",
      "destination at this call is TA-local"
    ],
    "negative_indicators": [
      "get_attribute_ptr correctness not proven here",
      "other code paths parse REE-supplied data with weaker checks"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety rules take precedence; size checks prevent overflow at this site and the copy does not expose TA secrets to REE, so it's not a vulnerability here.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Parses client-supplied attribute headers from head buffer using cli_ref.size without explicit validation against remaining bytes before using cli_ref.size-controlled lengths.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2311,
      "function": "attribute_is_modifiable",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(req_attr->id),src_sz=head->attrs_size,dst_sz=sizeof(req_attr->id)"
        ]
      },
      "why": "Decision logic branches directly on req_attr->id from untrusted parsed data; attribute payload/size not re-validated before allowing modifications.",
      "code_excerpt": "switch (req_attr->id) { ... }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out buffer (REE-visible); currently obj_handle is non-sensitive but this is a REE-facing copy.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #94: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> get_attribute -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueget_attributeTEE_MemMove

実行時間: 78.35秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187

パラメータインデックス: 0

解析結果

詳細: Memory-safety sanitizer (buffer-size check) at get_attribute prevents overflow at this call; the copy target is TA-private, so no direct unencrypted output occurs on this line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_attribute at lines [187, 220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 187 --
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
-- Call #2 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #3 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #4 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #5 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #6 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #7 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #8 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #9 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 187:
182:
183: return PKCS11_CKR_BUFFER_TOO_SMALL;
184: }
185:
186: if (attr)
187: >>> TEE_MemMove(attr, attr_ptr, size);
188:
189: if (attr_size)
190: *attr_size = size;
191:
192: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:187"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:298"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:352-353"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      },
      {
        "lhs": "dst",
        "rhs": "src (copied) via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 187,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: dst 'attr' (caller buffer) receives data from attr_ptr within template; both are TEE-private buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=*attr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(attr, attr_ptr, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies into local cli_head from 'cur' (template region) on stack; source is template memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies pkcs11_ref from ref_attr (likely from serialized template region) into local pkcs11_ref.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: similar copy of pkcs11_ref from ref_attr into local; used to lookup attribute pointer next.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies prefix string into prefix2 buffer; sizes computed with prefix_len (derived earlier).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len+1,src_sz=unknown,dst_sz=prefix_len+1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies pkcs11_ref from serialized buffer 'cur' into local pkcs11_ref; source is template region.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies up to MIN(pkcs11_ref.size, sizeof(data)) bytes from template area into local data[] buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies 'ref' into local 'head' structure; origin of 'ref' uncertain (could be REE-provided serialized data).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies prefix into 'pre' buffer before logging; origin of prefix uncertain, may be external.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [187]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [187] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      187
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 187,
      "function": "get_attribute",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copy writes into a TA-private buffer ('attr' points into template allocated inside TA) and get_attribute enforces a size check (returns BUFFER_TOO_SMALL) before copying, preventing overflow; not a direct REE exfiltration at this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params -> serialargs_alloc_get_attributes -> template (TEE-private)",
      "propagation_path": [
        "params (REE) -> ctrl->memref.buffer @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:767",
        "serialargs_alloc_get_attributes -> template (TEE-private) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:777-779",
        "cli_head <- cli_ref via TEE_MemMove @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832",
        "get_attribute called with data_ptr, &cli_head.size -> TEE_MemMove(attr, attr_ptr, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:186-187"
      ],
      "sink": "TEE_MemMove(attr, attr_ptr, size) writing into template/T A-private region"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls params memref to craft template contents",
        "object attribute sizes and template layout as parsed"
      ],
      "attack_scenario": "An attacker supplies malformed attribute descriptors via params to manipulate template contents; however the get_attribute size check prevents overruns at this copy site.",
      "impact": "If later the template is copied back to REE (separate site), sensitive attribute values could be exposed; this line itself does not directly exfiltrate."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "entry_get_attribute_value:792-796",
        "recommendation": "Ensure check_access_attrs_against_token robustly enforces attribute visibility and exportability before populating template."
      },
      {
        "type": "bounds_check",
        "location": "object.c:910",
        "recommendation": "Ensure out->memref.size is validated against template total size before copying to REE to prevent accidental disclosure or truncation."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit size check in get_attribute (lines 180-184) prevents copying when provided buffer too small",
        "Destination of this copy is TA-private template buffer, not REE-visible"
      ],
      "negative_indicators": [
        "Template originates from REE-provided params (serialargs_alloc_get_attributes) and may carry attacker-controlled sizes prior to sanitization",
        "Later TEE_MemMove(out->memref.buffer, template, out->memref.size) copies template to REE (structural risk)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety sanitizer (buffer-size check) at get_attribute prevents overflow at this call; the copy target is TA-private, so no direct unencrypted output occurs on this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "This TEE_MemMove invocation writes into TA-private memory and is protected by a prior size check, and thus is not a vulnerable sink for overflow or direct information disclosure by itself.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_attribute:180-184",
      "evidence": "if (attr_size && *attr_size < size) { *attr_size = size; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "type_validation",
      "location": "entry_get_attribute_value:745-765",
      "evidence": "ptypes == exp_pt check"
    },
    {
      "type": "access_control",
      "location": "entry_get_attribute_value:792-796",
      "evidence": "check_access_attrs_against_token(...) enforced"
    }
  ],
  "argument_safety": [
    {
      "arg": "attr (data_ptr / cli_ref->data)",
      "why_safe": "Destination buffer size is validated via attr_size check before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:180-187"
    },
    {
      "arg": "attr_ptr (object attribute storage)",
      "why_safe": "attr_ptr comes from get_attribute_ptr which returns attribute pointer and size; size used in bounds check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:176-183"
    }
  ],
  "residual_risks": [
    "line 910: template (which may contain attribute values derived from object attributes) is copied to out->memref.buffer (REE-visible) — possible information disclosure if sensitive attributes were not redacted",
    "template content initially derived from REE params before allocation (serialargs_alloc_get_attributes) — malformed inputs could influence template layout prior to checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check directly guarding the copy",
      "Copy target is TA-private at this site"
    ],
    "negative_indicators": [
      "Upstream template derived from REE-controlled data",
      "Subsequent copy of template to REE exists elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The dominant memory-safety rule applies: a bounds check prevents overflow at this TEE_MemMove and the destination is TA-private, so no immediate unencrypted output; structural risks (notably template -> REE copy) remain and are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-constructed template (which may contain attribute values) into REE-visible out->memref.buffer; this is the actual REE-facing copy that could leak attributes if they are sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 301,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "params (TEE_Param array) originates from REE and is passed into entry_get_attribute_value; template allocation later is derived from these params.",
      "code_excerpt": "rc = entry_get_attribute_value(client, ptypes, params);"
    }
  ]
}
フロー #95: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> modify_attributes_list -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuemodify_attributes_listTEE_MemMove

実行時間: 72.09秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: params[0].memref.buffer (caller REE-provided serialized attributes)

シンク: TEE_MemMove(&cli_head, cur, sizeof(cli_head)) into local cli_head

判定理由: The copy reads a fixed-size header from a buffer whose remaining size isn't checked before the copy and then uses the parsed size to advance the pointer; this is a classic weak-input-validation leading to possible out-of-bounds reads and malformed length-driven loop behavior.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from modify_attributes_list at lines [220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #2 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #3 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #4 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #5 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #6 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #7 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #8 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 220:
215:     	for (; cur < end; cur += len) {
216:     		struct pkcs11_attribute_head *cli_ref = (void *)cur;
217:     
218:     		struct pkcs11_attribute_head cli_head = { };
219:     
220: >>> 		TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221:     		len = sizeof(cli_head) + cli_head.size;
222:     
223:     		rc = set_attribute(dst, cli_head.id,
224:     				   cli_head.size ? cli_ref->data : NULL,
225:     				   cli_head.size);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "copy_len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "TEE_MemMove:unknown"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "TEE_MemMove:unknown"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length",
        "site": "TEE_MemMove:unknown"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &cli_head is a local/TEE-private buffer receiving data from cur (region derived from head); binding of dst to caller origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copy from cur uses sizeof(cli_head) while loop bounds use head->attrs_size; cli_head.size then used to compute len without stronger validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &pkcs11_ref is local and receives bytes from ref_attr (origin region tied to head/cur)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &pkcs11_ref is local and source ref_attr derives from parsed head data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination prefix2 is local; source prefix may be from parsed data or constant, binding of src/dst at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &pkcs11_ref local, source cur derives from head/serialized data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=head->attrs_size,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &data[0] local, source cur+sizeof(pkcs11_ref) is within parsed buffer; length MIN(pkcs11_ref.size, sizeof(data)) used",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size,sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination &head is local and receives bytes from ref (origin tied to caller-provided head/new buffers)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pre (likely buffer) receives prefix bytes; binding of prefix source to origin shown at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [220]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [220] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      220
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "TEE_MemMove copies sizeof(cli_head) from cur into a local structure while loop bounds use head->attrs_size and there is no per-iteration check that end - cur >= sizeof(cli_head), allowing out-of-bounds read or malformed length (cli_head.size) to drive loop arithmetic.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer (caller REE-provided serialized attributes)",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_alloc_get_attributes -> template/head @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1002-1004",
        "head -> cur = (char*)head + sizeof(struct obj_attrs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:210",
        "cur -> TEE_MemMove(&cli_head, cur, sizeof(cli_head)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220 (sink)"
      ],
      "sink": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)) into local cli_head"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE-side serialized attributes are passed in params memref",
        "head->attrs_size is small or malformed so that cur is near end and fewer than sizeof(cli_head) bytes remain",
        "No additional validation is performed on cli_head.size or remaining bytes"
      ],
      "attack_scenario": "A malicious caller crafts the serialized attributes such that cur points near the end of the buffer or contains a malformed cli_head.size; the TEE_MemMove then reads beyond the intended region or parses an inflated cli_head.size which can cause subsequent loop arithmetic to go out-of-bounds or trigger other logic errors.",
      "impact": "Potential memory-safety issues (out-of-bounds read) and downstream logic/control-flow corruption leading to crashes or further misuse of attacker-controlled lengths."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "modify_attributes_list:215-221",
        "recommendation": "Before copying sizeof(cli_head) from cur, verify (end - cur) >= sizeof(cli_head); after parsing cli_head.size, verify (end - cur) >= len and that len is within reasonable limits."
      },
      {
        "type": "range_check",
        "location": "modify_attributes_list:221",
        "recommendation": "Validate cli_head.size is within expected maximums to prevent integer overflow or excessive allocations/iterations."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy (TEE_MemMove) uses sizeof(cli_head) with no per-iteration size check",
        "Loop bounds derived from head->attrs_size which originates from serialized REE input"
      ],
      "negative_indicators": [
        "There is an enclosing for-loop condition cur < end which provides some boundary but not a per-copy length check"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy reads a fixed-size header from a buffer whose remaining size isn't checked before the copy and then uses the parsed size to advance the pointer; this is a classic weak-input-validation leading to possible out-of-bounds reads and malformed length-driven loop behavior.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 220,
        "function": "modify_attributes_list",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies sizeof(cli_head) from cur without verifying remaining bytes (end - cur) >= sizeof(cli_head); cli_head.size then used to compute len affecting loop bounds."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_set_attribute_value:974-991",
      "evidence": "ptypes compared to expected exp_pt and returns on mismatch"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1047-1052 (create_attributes_from_template called) but template validation is limited"
    }
  ],
  "residual_risks": [
    "220: potential information disclosure not promoted because primary memory-safety (weak_input_validation) takes precedence; attacker-controlled template could still lead to REE-visible data exposure elsewhere"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of unvalidated copy at line 220",
      "Upstream source is attacker-controlled serialized data"
    ],
    "negative_indicators": [
      "Loop condition cur < end provides partial bounding but not sufficient per-copy check"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety (weak input validation) at the copy site is the dominant issue: an unguarded fixed-size copy from a parsed buffer whose remaining length isn't checked can be exploited; therefore it is reported as vulnerable with medium confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=head->attrs_size,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "parses cli_head.size from unvalidated buffer and uses it to compute len and advance cur without ensuring sufficient remaining bytes for each copy.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;"
    }
  ]
}
フロー #96: TA_InvokeCommandEntryPoint -> entry_copy_object -> modify_attributes_list -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectmodify_attributes_listTEE_MemMove

実行時間: 66.92秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: params/ctrl memref provided by REE parsed into template/head via serialargs

シンク: TEE_MemMove(&cli_head, cur, sizeof(cli_head)) copies data from possibly-short buffer into stack

判定理由: Memory-safety weakness (insufficient bounds validation) at the memcpy-like call is present because the code copies a fixed header size from a parsed buffer without ensuring that many bytes remain; memory-safety is prioritized over information-disclosure classification.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from modify_attributes_list at lines [220, 265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 220 --
218: struct pkcs11_attribute_head cli_head = { };
219:
220: >>> TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221: len = sizeof(cli_head) + cli_head.size;
222:
-- Call #2 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #3 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #4 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #5 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #6 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #7 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #8 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 220:
215:     	for (; cur < end; cur += len) {
216:     		struct pkcs11_attribute_head *cli_ref = (void *)cur;
217:     
218:     		struct pkcs11_attribute_head cli_head = { };
219:     
220: >>> 		TEE_MemMove(&cli_head, cur, sizeof(cli_head));
221:     		len = sizeof(cli_head) + cli_head.size;
222:     
223:     		rc = set_attribute(dst, cli_head.id,
224:     				   cli_head.size ? cli_ref->data : NULL,
225:     				   cli_head.size);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "cli_head",
      "pkcs11_ref",
      "prefix2",
      "data",
      "head",
      "pre"
    ],
    "propagation": [
      {
        "lhs": "cli_head",
        "rhs": "copied from cur via TEE_MemMove at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      },
      {
        "lhs": "pkcs11_ref",
        "rhs": "copied from ref_attr/cur via TEE_MemMove at call-sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265,298,352"
      },
      {
        "lhs": "prefix2",
        "rhs": "copied from prefix via TEE_MemMove at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "data",
        "rhs": "copied from cur+sizeof(pkcs11_ref) via TEE_MemMove at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353-354"
      },
      {
        "lhs": "head",
        "rhs": "copied from ref via TEE_MemMove at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      },
      {
        "lhs": "pre",
        "rhs": "copied from prefix via TEE_MemMove at call-site",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:447"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove calls rely on caller-provided length; callers sometimes check bounds elsewhere but not at all call-sites"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies header from potentially REE-influenced buffer 'cur' into TA stack cli_head; length used without verifying remaining bytes at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end-cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference structure from ref_attr into local pkcs11_ref; origin of ref_attr is parsed data (unknown)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 298,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies reference structure from ref_attr into local pkcs11_ref at another call-site; source provenance unclear",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=unknown,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 344,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix string into prefix2 buffer using prefix_len-based size; origin of prefix may be REE-influenced",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=prefix_len + 1,src_sz=unknown,dst_sz=prefix_len + 1"
        ]
      },
      "code_excerpt": "TEE_MemMove(prefix2, prefix, prefix_len + 1);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 352,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute header from cur into pkcs11_ref then copies data into local small buffer; cli-provided sizes drive MIN() used for copy",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=end-cur,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute bytes into local data[] using MIN(pkcs11_ref.size, sizeof(data)); source is parsed buffer influenced by REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=MIN(pkcs11_ref.size, sizeof(data)),src_sz=pkcs11_ref.size,dst_sz=sizeof(data)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies head structure from ref (unknown provenance) into local head variable; caller-supplied ref may be untrusted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&head, ref, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 447,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies prefix into pre buffer for logging; prefix origin may be untrusted leading to log injection risk",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=strlen(prefix),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(pre, prefix, strlen(prefix));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [220]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [220] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      220
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(cli_head) from cur (parsed attribute stream ultimately influenced by REE) into stack cli_head using length derived from untrusted header stream; loop bound uses head->attrs_size but does not ensure end-cur >= sizeof(cli_head) before the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "params/ctrl memref provided by REE parsed into template/head via serialargs",
      "propagation_path": [
        "params (REE) -> ctrl->memref.buffer (entry_copy_object) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108",
        "ctrl buffer -> template/head via serialargs_alloc_get_attributes : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118",
        "head->attrs_size -> modify_attributes_list cur/end computation : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:210-211",
        "cur (from head) -> TEE_MemMove(&cli_head, cur, sizeof(cli_head)) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:220"
      ],
      "sink": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)) copies data from possibly-short buffer into stack"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted params leading to a head with attrs_size smaller than sizeof(cli_head) or with malformed attribute headers",
        "No additional checks verifying remaining bytes before this TEE_MemMove"
      ],
      "attack_scenario": "A malicious REE client supplies a crafted attribute stream where head->attrs_size or remaining bytes are smaller than sizeof(cli_head), causing TEE_MemMove to read out-of-bounds and potentially crash or leak memory.",
      "impact": "Out-of-bounds read can cause crash or disclosure of TA memory; in some contexts may be leveraged for control-flow or information disclosure."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "modify_attributes_list:220",
        "recommendation": "Verify (end - cur) >= sizeof(cli_head) before TEE_MemMove and validate cli_head.size against remaining bytes."
      },
      {
        "type": "range_check",
        "location": "entry_copy_object:1108-1122",
        "recommendation": "Ensure serialargs_alloc_get_attributes and creation of head enforce sane max attrs_size and validate template sizes before passing to modify_attributes_list."
      },
      {
        "type": "type_validation",
        "location": "modify_attributes_list:221-225",
        "recommendation": "Validate cli_head.size is within expected bounds before using it to advance the loop or allocate."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove at line 220 copies fixed sizeof(cli_head) from cur derived from head->attrs_size bound",
        "No explicit check that (end - cur) >= sizeof(cli_head) before the copy"
      ],
      "negative_indicators": [
        "Loop uses cur < end as a bound which may prevent some OOB cases if head->attrs_size is correct",
        "Higher-level serialargs_remaining_bytes check exists in caller but does not guarantee layout safety here"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety weakness (insufficient bounds validation) at the memcpy-like call is present because the code copies a fixed header size from a parsed buffer without ensuring that many bytes remain; memory-safety is prioritized over information-disclosure classification.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 220,
        "function": "modify_attributes_list",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)) can read beyond available bytes because end computed from head->attrs_size is not checked to be >= sizeof(cli_head) before the copy."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "loop_bound_check",
      "location": "modify_attributes_list:215",
      "evidence": "for (; cur < end; cur += len) uses end computed from head->attrs_size"
    },
    {
      "type": "type_validation",
      "location": "entry_copy_object:1104-1106",
      "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1118-1125"
    }
  ],
  "residual_risks": [
    "Line 220 memory-safety finding suppresses direct unencrypted_output labeling; however, attribute data derived from REE may still lead to info disclosure elsewhere if copied to REE later."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size copy from parsed buffer without explicit (end-cur) >= sizeof(header) check"
    ],
    "negative_indicators": [
      "Caller performed serialargs_remaining_bytes checks, but that does not guarantee per-header layout correctness"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Marked vulnerable due to insufficient local bounds validation before copying a fixed-size header from an untrusted parsed buffer; this is a memory-safety (weak input validation) issue requiring explicit pre-copy length checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 221,
      "function": "modify_attributes_list",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses cli_head.size (from unvalidated header) to compute len and advance loop, enabling OOB or infinite loop if header is malicious.",
      "code_excerpt": "len = sizeof(cli_head) + cli_head.size;"
    }
  ]
}
フロー #97: TA_InvokeCommandEntryPoint -> entry_wrap_key -> attributes_match_reference -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_wrap_keyattributes_match_referenceTEE_MemMove

実行時間: 58.90秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: req_attrs/ref->attrs (attribute reference blob) originating from wrapping key attribute retrieval

シンク: TEE_MemMove reads fixed sizeof(pkcs11_ref) bytes from caller-provided ref_attr

判定理由: Memory-safety issue: an unconditional fixed-size read from a caller-provided blob without verifying remaining bytes creates an out-of-bounds read (CWE-125); this takes precedence over information-disclosure classification.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from attributes_match_reference at lines [265, 298, 344, 352, 353, 435, 447]:
-- Call #1 at line 265 --
263: uint32_t size = 0;
264:
265: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:
267:
-- Call #2 at line 298 --
296: uint32_t size = 0;
297:
298: >>> TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
299:
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
-- Call #3 at line 344 --
342: return;
343:
344: >>> TEE_MemMove(prefix2, prefix, prefix_len + 1);
345: TEE_MemFill(prefix2 + prefix_len, ' ', 4);
346: *(prefix2 + prefix_len + 4) = '\0';
-- Call #4 at line 352 --
350: uint8_t data[4] = { 0 };
351:
352: >>> TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
-- Call #5 at line 353 --
351:
352: TEE_MemMove(&pkcs11_ref, cur, sizeof(pkcs11_ref));
353: >>> TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref),
354: MIN(pkcs11_ref.size, sizeof(data)));
355:
-- Call #6 at line 435 --
433: char *pre = NULL;
434:
435: >>> TEE_MemMove(&head, ref, sizeof(head));
436:
437: if (!head.attrs_count)
-- Call #7 at line 447 --
445:
446: if (prefix)
447: >>> TEE_MemMove(pre, prefix, strlen(prefix));
448:
449: IMSG_RAW("%s,--- (serial object) Attributes list --------", pre);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

// Call at line 265:
260:     	for (count = 0; count < ref->attrs_count; count++) {
261:     		struct pkcs11_attribute_head pkcs11_ref = { };
262:     		void *value = NULL;
263:     		uint32_t size = 0;
264:     
265: >>> 		TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));
266:     
267:     
268:     		if (attribute_is_hidden(&pkcs11_ref))
269:     			return false;
270:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "ref_attr",
      "pkcs11_ref",
      "prefix",
      "prefix2",
      "cur",
      "head",
      "pre",
      "prefix_len"
    ],
    "propagation": [
      {
        "lhs": "pkcs11_ref",
        "rhs": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:265"
      },
      {
        "lhs": "data[0]",
        "rhs": "TEE_MemMove(&data[0], cur + sizeof(pkcs11_ref), MIN(pkcs11_ref.size, sizeof(data)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:353-354"
      },
      {
        "lhs": "prefix2",
        "rhs": "TEE_MemMove(prefix2, prefix, prefix_len + 1)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:344"
      },
      {
        "lhs": "head",
        "rhs": "TEE_MemMove(&head, ref, sizeof(head))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:435"
      }
    ],
    "sanitizers": [
      {
        "kind": "equality_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:273-275",
        "evidence": "checks size == pkcs11_ref.size and uses TEE_MemCompare to validate contents"
      },
      {
        "kind": "early_return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:255-258",
        "evidence": "if (!ref->attrs_count) return true"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies pkcs11_ref from ref_attr using sizeof(pkcs11_ref) without an explicit overall bounds check against ref->attrs total bytes; a malformed ref can cause out-of-bounds read.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&pkcs11_ref' is a local TA stack object (TEE-private) receiving data from ref_attr.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'ref_attr' aliases ref->attrs provided by caller (origin from req_attrs); origin considered TA-private but upstream provenance varies.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [265]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [265] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      265
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 265,
      "function": "attributes_match_reference",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(pkcs11_ref) from ref_attr without an explicit bounds check that ref->attrs contains that many bytes; malformed/ref truncated input can cause out-of-bounds read.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "req_attrs/ref->attrs (attribute reference blob) originating from wrapping key attribute retrieval",
      "propagation_path": [
        "req_attrs -> ref (entry_wrap_key) @ processing.c:1248-1250",
        "ref->attrs -> ref_attr @ attributes.c:252",
        "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref)) @ attributes.c:265 (sink)"
      ],
      "sink": "TEE_MemMove reads fixed sizeof(pkcs11_ref) bytes from caller-provided ref_attr"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled or malformed req_attrs/ref->attrs blob with length smaller than expected",
        "No prior validation ensuring ref->attrs contains sizeof(pkcs11_ref) bytes at this offset"
      ],
      "attack_scenario": "A crafted wrapping template (req_attrs) with insufficient bytes causes TEE_MemMove to read past the provided buffer, leading to out-of-bounds read of TA memory which may crash the TA or leak adjacent memory via subsequent behavior.",
      "impact": "Information disclosure or denial-of-service (TA crash); possible further memory-corruption dependent on downstream use of read data."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "attributes_match_reference:265",
        "recommendation": "Validate that remaining bytes in ref (derived from ref->attrs_count/total length) >= sizeof(pkcs11_ref) before calling TEE_MemMove."
      },
      {
        "type": "range_check",
        "location": "attributes_match_reference:277",
        "recommendation": "On advancing ref_attr, ensure cumulative offset cannot exceed total ref->attrs buffer size."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct fixed-size copy (TEE_MemMove) using sizeof(pkcs11_ref) from caller-provided buffer",
        "No explicit preceding bounds check against total ref->attrs length at this site"
      ],
      "negative_indicators": [
        "Loop iterates based on ref->attrs_count which may imply elements exist, but code does not verify per-iteration remaining byte count"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety issue: an unconditional fixed-size read from a caller-provided blob without verifying remaining bytes creates an out-of-bounds read (CWE-125); this takes precedence over information-disclosure classification.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
        "line": 265,
        "function": "attributes_match_reference",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Unconditional TEE_MemMove of sizeof(pkcs11_ref) from ref_attr without verifying ref buffer has sufficient bytes"
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "equality_check",
      "location": "attributes_match_reference:273-275",
      "evidence": "Checks size == pkcs11_ref.size and compares contents with TEE_MemCompare (post-copy)"
    }
  ],
  "argument_safety": [
    {
      "arg": "ref->attrs_count",
      "why_safe": "Used to control loop iteration count but not validated against byte-length per-iteration",
      "evidence": "attributes.c:260-261"
    }
  ],
  "residual_risks": [
    "Memory-safety finding prevents safe promotion to an information-disclosure classification for downstream uses of parsed attributes (e.g., compare/copy), as OOB reads may alter control flow or expose TA memory."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed-size read from unvalidated caller buffer at exact site",
      "No pre-check of remaining bytes before memcpy-equivalent"
    ],
    "negative_indicators": [
      "ref->attrs_count exists and loop bounds use it, suggesting intended structure, but insufficiently checked"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The unconditional fixed-size copy from a caller-supplied blob without verifying available bytes is a clear memory-safety vulnerability (CWE-125) with high confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes (TA-private secret) into params[2].memref.buffer (REE-visible) where out_size is derived from params[2].memref.size; bounds/size interactions could allow overwrite if dst too small.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc value into caller-provided params[0].memref.buffer (REE-visible); rc is non-sensitive but destination is shared.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 265,
      "function": "attributes_match_reference",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(pkcs11_ref),src_sz=ref->attrs_count_bytes,dst_sz=sizeof(pkcs11_ref)"
        ]
      },
      "why": "Call-site bindings: ref_attr aliases ref->attrs provided by caller; pkcs11_ref is local TA storage receiving the copy.",
      "code_excerpt": "TEE_MemMove(&pkcs11_ref, ref_attr, sizeof(pkcs11_ref));"
    }
  ]
}
フロー #98: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_alloc_get_one_attribute -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretserialargs_alloc_get_one_attributeserialargs_getTEE_MemMove

実行時間: 89.20秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Insufficient visible evidence that serialargs_get_ptr fails to validate bounds; because a validation check (rc) exists upstream, cannot conclusively mark the sink call as vulnerable. Structural weak-input-validation risk remains.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_one_attribute
プロンプト 中間 (serialargs_alloc_get_one_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_one_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [232, 421, 618, 873, 1149]:
-- Call #1 at line 232 --
230: return rc;
231:
232: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
233: if (rc)
234: goto out;
-- Call #2 at line 421 --
419: return rc;
420:
421: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
422: if (rc)
423: goto out;
-- Call #3 at line 618 --
616: }
617:
618: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
619: if (rc)
620: return rc;
-- Call #4 at line 873 --
871: return rc;
872:
873: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
874: if (rc)
875: return rc;
-- Call #5 at line 1149 --
1147: return rc;
1148:
1149: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
1150: if (rc)
1151: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

107: serialargs_alloc_get_one_attribute(struct serialargs *args,
108: struct pkcs11_attribute_head **out)
109: { 110: struct pkcs11_attribute_head head = { }; 111: enum pkcs11_rc rc = PKCS11_CKR_OK; 112: char *orig_next = args->next; 113: void *p = NULL; 114: 115: rc = serialargs_get(args, &head, sizeof(head)); 116: if (rc) 117: return rc; 118: 119: rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size); 120: if (rc) 121: return rc; 122: 123: *out = p; 124: 125: return PKCS11_CKR_OK; 126: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_one_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_one_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_one_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_one_attribute",
    "tainted_vars": [
      "args",
      "out",
      "head",
      "orig_next",
      "p"
    ],
    "propagation": [
      {
        "lhs": "orig_next",
        "rhs": "args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:112-113"
      },
      {
        "lhs": "head",
        "rhs": "serialargs_get(args, &head, sizeof(head)) reads from args buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-117"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size) allocates and fills p from args buffer using head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:119-121"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated copy of data)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:123-124"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-121",
        "evidence": "checks rc after serialargs_get and alloc_and_get and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 107,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "weak_input_validation",
      "why": "Size head.size parsed from untrusted args controls allocation and copy via alloc_and_get without further validation of head.size bounds here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=head.size,src_sz=unknown,dst_sz=head.size"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 107,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "caller-provided serialargs 'args' (originating from REE-provided memref) is used as source for parsing and allocation; alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &head, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 107,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "out parameter (caller pointer to receive allocated attr) is written with allocated pointer p; aliasing binds callee out to caller storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*out = p;"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [115, 136, 163]:
-- Call #1 at line 115 --
113: void *p = NULL;
114:
115: >>> rc = serialargs_get(args, &head, sizeof(head));
116: if (rc)
117: return rc;
-- Call #2 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #3 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) => src points into args buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) <- src",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-36",
        "evidence": "checks rc from serialargs_get_ptr and only performs TEE_MemMove when rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from args-derived src (untrusted/REE) into out without validating src bounds here; size is attacker-influenced",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee parameter 'args' aliases caller-provided serialargs (originates from REE memref); binding of callee param to shared buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_get(struct serialargs *args, void *out, size_t size)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out parameter is written via TEE_MemMove; binds callee out to caller storage (often TEE-private locals)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "args->next (caller context)"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "destination pointer passed to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "out <- src",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "caller checks rc from serialargs_get_ptr and only calls TEE_MemMove when rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from untrusted serialargs/REE buffer) into out without additional bounds validation here; size is attacker-influenced",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: src argument originates from caller-controlled serialargs buffer (REE-visible); alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: out parameter (destination) is caller-provided storage or local buffer and receives copied data; callee dest aliasing to caller storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "TEE_MemMove copies 'size' bytes from src derived from untrusted serialargs into out, but caller checks rc from serialargs_get_ptr before the copy; adequacy of serialargs_get_ptr validation is not visible here.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (params->memref.buffer)",
      "propagation_path": [
        "params (caller) -> serialargs_init/ctrlargs @ processing.c:226",
        "serialargs_get_ptr reads src from args buffer -> serialargs_get @ serializer.c:32",
        "TEE_MemMove(out, src, size) copies into out @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) @ serializer.c:34"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious or malformed serialargs in REE-provided memref",
        "serialargs_get_ptr fails to properly validate available bytes/size"
      ],
      "attack_scenario": "If serialargs_get_ptr does not ensure src has at least 'size' bytes, an attacker-controlled buffer could cause over-read or invalid reads into TA memory when TEE_MemMove is performed.",
      "impact": "Potential memory-safety issues (over-read or copy of attacker data into TA memory); no direct secret disclosure to REE at this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr validates that args has >= size bytes before returning success."
      },
      {
        "type": "type_validation",
        "location": "caller:serializer.c:32-35",
        "recommendation": "Where size is derived from parsed headers (e.g., head.size), validate reasonable upper bounds before allocation/copy."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Copy source is derived from REE-visible serialargs (tainted).",
        "TEE_MemMove uses attacker-influenced 'size'."
      ],
      "negative_indicators": [
        "Caller checks rc from serialargs_get_ptr and only calls TEE_MemMove on success (some validation exists).",
        "At call-sites size is typically fixed (sizeof structures) which limits risk if serialargs_get_ptr validated lengths)."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Insufficient visible evidence that serialargs_get_ptr fails to validate bounds; because a validation check (rc) exists upstream, cannot conclusively mark the sink call as vulnerable. Structural weak-input-validation risk remains.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The call only executes after serialargs_get_ptr returns success (rc checked); without visibility into serialargs_get_ptr's internals there is insufficient evidence to mark the line vulnerable.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "serialargs_get:serializer.c:32-35",
      "evidence": "rc = serialargs_get_ptr(...); if (!rc) TEE_MemMove(...);"
    },
    {
      "type": "type_validation",
      "location": "entry_generate_secret:processing.c:222-224",
      "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "Used with serialargs_get_ptr which returns rc checked by caller",
      "evidence": "serializer.c:32-35"
    },
    {
      "arg": "size",
      "why_safe": "Often a compile-time sizeof(...) at call sites, limiting size variability",
      "evidence": "calls in processing.c use sizeof(head)/sizeof(attr)/sizeof(uint32_t)"
    }
  ],
  "residual_risks": [
    "34: memory-safety depends on correctness of serialargs_get_ptr bounds checks; if that function is flawed an over-read/unsafe copy may occur"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "tainted source -> copy sink on same line",
      "size is attacker-influenced in some flows"
    ],
    "negative_indicators": [
      "upstream rc check exists; call sites use fixed sizes",
      "no evidence of secret/data flowing back to REE at this line"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Marked not_applicable rather than vulnerable because an upstream validation (serialargs_get_ptr rc) gates the copy; lack of visibility into that function prevents definitive vulnerability classification. Structural weak-input-validation issues remain and should be audited.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies size bytes from src derived from untrusted serialargs into out without validating source bounds at this site; relies on serialargs_get_ptr correctness.",
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=head.size,src_sz=unknown,dst_sz=head.size"
        ]
      },
      "why": "head.size parsed from untrusted data controls allocation and copy via alloc_and_get without further bounds validation here.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #99: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_alloc_get_one_attribute -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairserialargs_alloc_get_one_attributeserialargs_getTEE_MemMove

実行時間: 115.94秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Insufficient visible proof of a missing bounds check at this call-site to label it vulnerable under memory-safety rules; however copying untrusted data without explicit, visible validation is a weak_input_validation structural risk.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_one_attribute
プロンプト 中間 (serialargs_alloc_get_one_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_one_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [421, 618, 873, 1149]:
-- Call #1 at line 421 --
419: return rc;
420:
421: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
422: if (rc)
423: goto out;
-- Call #2 at line 618 --
616: }
617:
618: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
619: if (rc)
620: return rc;
-- Call #3 at line 873 --
871: return rc;
872:
873: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
874: if (rc)
875: return rc;
-- Call #4 at line 1149 --
1147: return rc;
1148:
1149: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
1150: if (rc)
1151: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

107: serialargs_alloc_get_one_attribute(struct serialargs *args,
108: struct pkcs11_attribute_head **out)
109: { 110: struct pkcs11_attribute_head head = { }; 111: enum pkcs11_rc rc = PKCS11_CKR_OK; 112: char *orig_next = args->next; 113: void *p = NULL; 114: 115: rc = serialargs_get(args, &head, sizeof(head)); 116: if (rc) 117: return rc; 118: 119: rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size); 120: if (rc) 121: return rc; 122: 123: *out = p; 124: 125: return PKCS11_CKR_OK; 126: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_one_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_one_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_one_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_one_attribute",
    "tainted_vars": [
      "args",
      "args->next",
      "orig_next",
      "head",
      "head.size",
      "p",
      "out"
    ],
    "propagation": [
      {
        "lhs": "head",
        "rhs": "serialargs_get(args, &head, sizeof(head)) reads from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-117"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size) allocates and copies head.size bytes from orig_next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:119-121"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated buffer containing copied attribute payload)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:123-124"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-117",
        "evidence": "serialargs_get reads fixed-size header sizeof(head) and returns error on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 421,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided serialargs pointer passed into callee; origin is ctrlargs built from REE-supplied ctrl->memref.buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 421,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&proc_params) passed into callee; out pointer resides in TA stack",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 618,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided serialargs pointer passed into callee at second call site; origin is ctrlargs from REE memref",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 618,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&proc_params) at second call site; out pointer is TA-local",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 873,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided serialargs pointer passed into callee at third call site; ctrlargs originates from REE buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 873,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&proc_params) at third call site; out pointer is TA-local",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1149,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided serialargs pointer passed into callee at fourth call site; ctrlargs holds REE-controlled cursor",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1149,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&proc_params) at fourth call site; pointer stored in TA-local variable",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_attribute_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "weak_input_validation",
      "why": "uses head.size (derived from serialized header read from args) to control allocation and copy without additional validation here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head.size,src_sz=ctrl->memref.size,dst_sz=allocated p size"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [115, 136, 163]:
-- Call #1 at line 115 --
113: void *p = NULL;
114:
115: >>> rc = serialargs_get(args, &head, sizeof(head));
116: if (rc)
117: return rc;
-- Call #2 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #3 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "src",
      "out",
      "size"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) reads a pointer into args' buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr returns error code on failure (checked by caller)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 115,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided serialargs ('args') passed into serialargs_get at this call site; origin is ctrlargs built from REE memref buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &head, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 115,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&head) passed into serialargs_get; out points to TA-local buffer receiving header",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(head),src_sz=unknown,dst_sz=sizeof(head)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &head, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided serialargs ('args') at second call site; originates from REE-controlled ctrlargs buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&attr) at second call site; out is TA-local receiving attribute header",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr),src_sz=unknown,dst_sz=sizeof(attr)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided serialargs ('args') at third call site; args cursor is REE-driven",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided out pointer (&session_handle) at third call site; TA-local receives session handle read from args",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "copies size bytes from src (derived from args) to out without validating that src points to trusted/private data here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sizeof(out buffer)"
        ]
      },
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out / dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "destination argument of TEE_MemMove receives bytes copied from src",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "dst <- src",
        "rhs": "TEE_MemMove(dst, src, size) copies size bytes from src to dst",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of caller-provided 'out' (TA-local/out param) passed as dst here; destination originates from caller context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of 'src' pointer (from serialargs_get_ptr) passed as src here; src is derived from args which originates from REE-provided buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sizeof(out buffer)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst 'ptr' (allocated local buffer) passed as dst; ptr is TA-allocated but will contain copied data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src 'buf0' passed as src; origin uncertain (could be REE-visible or TA-private) from earlier context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst 'ptr + buf0_sz' (pointer arithmetic) passed as dst; arithmetic on TA buffer influenced by sizes possibly from REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src 'src' passed as src; provenance may be REE-controlled via serialargs, making copied bytes untrusted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst 'buf + *blen' (offset write) passed as dst; destination offset depends on *blen which may be attacker-influenced leading to potential overflow",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from src (derived from args/REE) into out without validating that src contents or full bounds are trusted here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sizeof(out buffer)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies 'size' bytes from src (derived from REE-controlled serialargs) into TA memory; callers check serialargs_get_ptr return but there is insufficient visible evidence here to confirm a bounds/size sanitizer or sensitive-data promotion to REE.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-unknown",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params.ctrl->memref.buffer (via serialargs/ctrlargs)",
      "propagation_path": [
        "params.ctrl->memref.buffer -> ctrlargs (processing.c:415)",
        "ctrlargs.next / serialargs_get_ptr -> src (serializer.c:32)",
        "TEE_MemMove(out, src, size) copies into TA out buffer (serializer.c:34)"
      ],
      "sink": "TEE_MemMove(out, src, size) (serializer.c:34)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls serialized input in REE-provided memref buffer",
        "serialargs_get_ptr returns src and size such that size exceeds expected/allocated destination"
      ],
      "attack_scenario": "Malformed serial payload causes serialargs_get_ptr/alloc_and_get to return a src/size that lead to an out-of-bounds copy into TA memory, enabling memory corruption.",
      "impact": "Potential memory corruption in TA (information disclosure, integrity compromise, crash) if bounds checks are missing."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure explicit validated bounds (src within args buffer and dst size adequate) before copying; use saturated checks comparing size against remaining bytes and destination capacity."
      },
      {
        "type": "type_validation",
        "location": "serialargs_alloc_get_one_attribute:119",
        "recommendation": "Validate head.size against a sane maximum before allocating/copying."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "src is derived from REE-controlled serialargs",
        "TEE_MemMove is used to copy 'size' bytes"
      ],
      "negative_indicators": [
        "caller checks serialargs_get/serialargs_get_ptr return codes before memmove",
        "some upstream validations of ptypes and out->memref.size exist in callers"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Insufficient visible proof of a missing bounds check at this call-site to label it vulnerable under memory-safety rules; however copying untrusted data without explicit, visible validation is a weak_input_validation structural risk.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "No definitive evidence that copy_len exceeds source or destination bounds at this program point; callers perform some checks and serialargs_get_ptr return is tested before the copy.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_key_pair:412-413",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to out_ref_size"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get:32",
      "evidence": "serialargs_get_ptr return code is checked before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (from serialargs_get_ptr)",
      "why_safe": "serialargs_get_ptr returns error if invalid and caller checks rc",
      "evidence": "serializer.c:32-34"
    },
    {
      "arg": "out (destination)",
      "why_safe": "destination is TA-local buffer provided by caller; caller validated out->memref.size against expected out_ref_size in entry_generate_key_pair",
      "evidence": "processing.c:410-413"
    }
  ],
  "residual_risks": [
    "34: Potential memory-safety issue if serialargs_get_ptr or earlier parsers fail to fully validate head.size/remaining bytes; weak_input_validation structural risk retained."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from REE-derived buffer into TA memory (memmove of size bytes).",
      "head.size is used to control allocations elsewhere (alloc_and_get) with limited local checks visible."
    ],
    "negative_indicators": [
      "Return codes from serialargs_get/serialargs_get_ptr are checked before copying.",
      "Higher-level checks on ptypes and out->memref.size exist in callers."
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the available evidence, the memmove at line 34 is a weak_input_validation structural risk but lacks conclusive proof of an out-of-bounds copy; therefore not reported as a confirmed vulnerability but residual risk and mitigations are provided.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sizeof(out buffer)"
        ]
      },
      "why": "Copies 'size' bytes from REE-derived src into TA memory without an explicit visible bounds check here tying size to destination capacity.",
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #100: TA_InvokeCommandEntryPoint -> entry_wrap_key -> serialargs_alloc_get_one_attribute -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyserialargs_alloc_get_one_attributeserialargs_getTEE_MemMove

実行時間: 102.85秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: At this callsite size is a fixed compile-time length and serialargs_get_ptr must succeed before TEE_MemMove runs, preventing an immediate buffer overflow or information leak; therefore not vulnerable.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_one_attribute
プロンプト 中間 (serialargs_alloc_get_one_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_one_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1149]:
-- Call #1 at line 1149 --
1147: return rc;
1148:
1149: >>> rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);
1150: if (rc)
1151: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

107: serialargs_alloc_get_one_attribute(struct serialargs *args,
108: struct pkcs11_attribute_head **out)
109: { 110: struct pkcs11_attribute_head head = { }; 111: enum pkcs11_rc rc = PKCS11_CKR_OK; 112: char *orig_next = args->next; 113: void *p = NULL; 114: 115: rc = serialargs_get(args, &head, sizeof(head)); 116: if (rc) 117: return rc; 118: 119: rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size); 120: if (rc) 121: return rc; 122: 123: *out = p; 124: 125: return PKCS11_CKR_OK; 126: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_one_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_one_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_one_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_one_attribute",
    "tainted_vars": [
      "args",
      "args->next",
      "orig_next",
      "head",
      "p",
      "out"
    ],
    "propagation": [
      {
        "lhs": "head",
        "rhs": "serialargs_get(args, &head, sizeof(head)) reads from args->next / args buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-117"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size) copies data from orig_next using head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:119-121"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated/copy result) assigned to caller out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:123"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115-117",
        "evidence": "checks rc after serialargs_get and returns on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:119-121",
        "evidence": "checks rc after alloc_and_get and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1149,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1149,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is &proc_params (TA-private pointer out on stack) passed by caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_one_attribute(&ctrlargs, &proc_params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "rule": "weak_input_validation",
      "why": "Uses head.size (derived from reader-controlled data in args) to allocate/copy via alloc_and_get without additional validation of head.size bounds.",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head.size,src_sz=orig_remaining_bytes,dst_sz=head.size"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [115, 136, 163]:
-- Call #1 at line 115 --
113: void *p = NULL;
114:
115: >>> rc = serialargs_get(args, &head, sizeof(head));
116: if (rc)
117: return rc;
-- Call #2 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #3 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) -> src derived from args->next/caller buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "caller-provided out pointer passed into serialargs_get",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27-36"
      },
      {
        "lhs": "out (written)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "returns rc from serialargs_get_ptr and only does TEE_MemMove when rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 115,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &head, sizeof(head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs derived from ctrl->memref.buffer (caller-provided shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from args/REE data) into caller-provided out using TEE_MemMove; size originates from caller-controlled call and may be unvalidated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining_bytes,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "out (destination)",
        "rhs": "callee-provided destination pointer in TEE_MemMove calls (written)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66-67,188"
      },
      {
        "lhs": "src (source)",
        "rhs": "source pointer passed into TEE_MemMove, may originate from args/REE or internal buffers",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34,64-67,186-189"
      },
      {
        "lhs": "written_region",
        "rhs": "TEE_MemMove(..., size) copies size bytes from src to out/ptr/buf+*blen",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66-67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr returns rc and TEE_MemMove only executed if rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args/REE data) into out using TEE_MemMove; size is caller-influenced and may be unvalidated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining_bytes,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "First TEE_MemMove copies buf0 (likely TA data) into ptr, second copies src (potentially REE-controlled) into ptr+buf0_sz; second copy size may be influenced by REE.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz or size,src_sz=buf0_sz/orig_remaining_bytes,dst_sz=ptr_alloc_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from src (reader-controlled) into ptr+buf0_sz; offset arithmetic with buf0_sz may lead to out-of-bounds if sizes unvalidated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining_bytes,dst_sz=ptr_alloc_sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data into buf + *blen; *blen and len may be influenced by caller-controlled values leading to overflow if unbounded.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=orig_remaining_bytes,dst_sz=buf_capacity - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies a fixed-size sizeof(head) bytes into a TA-private out buffer; source is reader-provided but serialargs_get_ptr returns error unless sufficient bytes are available, so the immediate copy is guarded.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "args (caller/REE-provided buffer)",
      "propagation_path": [
        "args->next -> serialargs_get_ptr -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) (copy into TA-private out)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed/insufficient args buffer passed from REE to serialargs_get_ptr"
      ],
      "attack_scenario": "If serialargs_get_ptr incorrectly reports success despite insufficient bytes, an over-read could occur when copying into out.",
      "impact": "Potential memory-safety (over-read) or crash in TA; no REE exfiltration at this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr strictly verifies that src points to at least size bytes and fails otherwise; add explicit size limits where caller-provided sizes are used."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr returns rc and TEE_MemMove only executed when rc == 0",
        "size at this call is sizeof(head), a fixed compile-time size"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not shown here; relies on its correctness",
        "other callsites use variable sizes influenced by REE"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "At this callsite size is a fixed compile-time length and serialargs_get_ptr must succeed before TEE_MemMove runs, preventing an immediate buffer overflow or information leak; therefore not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 34 is guarded by serialargs_get_ptr's success check and targets a TA-private buffer with a fixed-size copy, preventing immediate unsafe REE-visible output or overflow.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get_ptr returns rc and TEE_MemMove only executed if rc == 0"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "At this callsite size == sizeof(head), a fixed compile-time size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:115"
    },
    {
      "arg": "out",
      "why_safe": "Caller provides a TA-private buffer (local 'head') sized for sizeof(head)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:110-116"
    }
  ],
  "residual_risks": [
    "line34: depends on correctness of serialargs_get_ptr; if that function misreports success, over-read may occur"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit rc check before TEE_MemMove",
      "fixed-size copy at this callsite"
    ],
    "negative_indicators": [
      "implementation of serialargs_get_ptr not shown (assumed correct)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the local fixed-size target, the pre-copy rc check, and no REE-visible destination, the line is not an information-disclosure or immediate memory-safety vulnerability; remaining risk depends on serialargs_get_ptr correctness.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head.size,src_sz=orig_remaining_bytes,dst_sz=head.size"
        ]
      },
      "why": "Uses head.size (derived from reader-controlled data in args) to allocate/copy without additional validation of head.size bounds.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes TA-private key_data (sensitive) into params[2].memref.buffer (REE-visible) with out_size derived from caller buffer size; potential secret disclosure if not properly bounded.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #101: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 115.17秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 34 is guarded by serialargs_get_ptr's success return which prevents out-of-bounds/absent-source copies; the direction is REE->TA so not an unencrypted REE leak.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [236, 425, 429, 877]:
-- Call #1 at line 236 --
234: goto out;
235:
236: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
237: if (rc)
238: goto out;
-- Call #2 at line 425 --
423: goto out;
424:
425: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &pub_template);
426: if (rc)
427: goto out;
-- Call #3 at line 429 --
427: goto out;
428:
429: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &priv_template);
430: if (rc)
431: goto out;
-- Call #4 at line 877 --
875: return rc;
876:
877: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
878: if (rc)
879: goto out_free;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "out",
      "attr",
      "orig_next",
      "p",
      "args->next",
      "attr.attrs_size"
    ],
    "propagation": [
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated and filled from args buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      },
      {
        "lhs": "orig_next",
        "rhs": "args->next (saved at function entry)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:133-134"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-143",
        "evidence": "checks rc after serialargs_get and alloc_and_get and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 236,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "caller-provided serialargs (ctrlargs) originates from ctrl->memref.buffer (REE-visible) and is forwarded into callee; callee reads from args->next which may reference REE memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=attr.attrs_size"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 236,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "callee out parameter (&template) is an alias of caller local pointer; callee writes allocated pointer back into caller-provided storage (binding of out)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "args->next"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "only performs TEE_MemMove if serialargs_get_ptr returned success (rc == 0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller passes &attr (stack) as out; function reads src from args (which originates from REE-visible buffer) and copies size bytes into caller stack object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(attr)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller passes &session_handle as out; function copies size bytes from args-derived src (potentially REE memory) into caller stack variable",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dst",
        "rhs": "buf0 (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "dst + buf0_sz",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from serialargs_get_ptr reading args which originate from REE) into caller stack object 'out' (TEE-private) via TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(attr)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0_sz bytes from buf0 into ptr; origin of buf0 unclear (could be REE-derived), binding ptr target is TEE-private allocation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src into ptr+buf0_sz; src origin uncertain (likely args-derived) and destination is TA-private buffer with pointer arithmetic",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Appends 'len' bytes from data into buf + *blen; data/source origin may be REE-visible and write uses caller-provided length *blen (tainted arithmetic)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen)+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies 'size' bytes from src obtained via serialargs_get_ptr (which validates and returns error if unavailable) into caller 'out' (TEE-private); src is REE-derived but serialargs_get_ptr return is checked before copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 34 is guarded by serialargs_get_ptr's success return which prevents out-of-bounds/absent-source copies; the direction is REE->TA so not an unencrypted REE leak.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serialargs_get:32-35",
      "evidence": "serialargs_get_ptr returned rc checked and TEE_MemMove only executed when rc == 0"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (from serialargs_get_ptr)",
      "why_safe": "validated by serialargs_get_ptr before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
    },
    {
      "arg": "out",
      "why_safe": "caller provides sized destination; callers check out->memref.size before invoking higher-level flows",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:222-224"
    }
  ],
  "residual_risks": [
    "34: source is REE-visible (ctrl->memref.buffer) so upstream attacker-controlled data flows into TA memory; if serialargs_get_ptr has an implementation bug this could lead to over-read or malformed data"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return is checked before TEE_MemMove",
      "higher-level callers validate ptypes and out->memref.size"
    ],
    "negative_indicators": [
      "src_region is REE-visible (untrusted) and some downstream uses (create_attributes_from_template, generate_random_key_value) manipulate parsed data",
      "serialargs_get_ptr implementation not shown here; correctness assumed"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety checks (serialargs_get_ptr return and caller validations) prevent the copy from being exploitable at this line; the flow is REE->TA (not TA->REE) so it is not an unencrypted output.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 236,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=attr.attrs_size"
        ]
      },
      "why": "serialargs_alloc_get_attributes reads from ctrlargs (REE-origin) and allocates/returns a template into TA memory",
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 236,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "why": "Params array (caller-provided memrefs) is forwarded into helper; out memref is REE-visible",
      "code_excerpt": "rc = entry_generate_secret(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(attr)"
        ]
      },
      "why": "Copies bytes from args-derived src (REE) into local attr object; relies on serialargs_get_ptr for bounds validation",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "alloc_and_get / related",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen)+len"
        ]
      },
      "why": "Appends len bytes from data into buf + *blen using tainted arithmetic for destination offset",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #102: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 128.58秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided serialargs buffer (params->memref.buffer from TA entry)

シンク: TEE_MemMove copying 'size' bytes from REE-derived src into TA memory

判定理由: The copy reads from REE-derived memory into TA memory using a caller-supplied size without visible, sufficient validation at this program point, creating a realistic memory-safety risk (weak input validation).

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [425, 429, 877]:
-- Call #1 at line 425 --
423: goto out;
424:
425: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &pub_template);
426: if (rc)
427: goto out;
-- Call #2 at line 429 --
427: goto out;
428:
429: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &priv_template);
430: if (rc)
431: goto out;
-- Call #3 at line 877 --
875: return rc;
876:
877: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
878: if (rc)
879: goto out_free;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "args->next",
      "orig_next",
      "attr",
      "attr.attrs_size",
      "p",
      "out"
    ],
    "propagation": [
      {
        "lhs": "orig_next",
        "rhs": "args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:133"
      },
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-142"
      },
      {
        "lhs": "*out",
        "rhs": "p",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 425,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "alias of caller's serialargs object (ctrlargs) originating from REE memref buffer passed into callee as args",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &pub_template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 429,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "alias of caller-local pointer (&priv_template) passed as out parameter into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object_head*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &priv_template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "rule": "weak_input_validation",
      "why": "attr.attrs_size (read from REE-controlled args via serialargs_get) used as length in alloc_and_get without further validation",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "src",
      "out",
      "size",
      "args->next"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 425,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller's serialargs object (&ctrlargs) passed into serialargs_get; origin is REE-provided memref buffer from TA entry path",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided serialargs passed into serialargs_get at another callsite (session_handle read); args originates from REE-visible buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies size bytes from src (derived via serialargs_get_ptr from REE data) into out without validating size or src provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out/dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "dst <- src",
        "rhs": "TEE_MemMove(dst, src, size) copies size bytes from src to dst",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from serialargs_get_ptr reading REE-controlled args) into caller-provided out without validating src provenance beyond serialargs_get_ptr return",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies buf0_sz bytes from buf0 (origin may be REE-visible) into allocated ptr without validating combined sizes/overlap",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src into ptr+buf0_sz without validating src provenance or that ptr has room for buf0_sz+size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies len bytes from data (likely REE-controlled) into buf + *blen without explicit bounds check against buffer capacity",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies size bytes from src (derived from REE-controlled serialargs) into out without an explicit validated src/dst size at this callsite; upstream checks not visible here.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (params->memref.buffer from TA entry)",
      "propagation_path": [
        "params (REE-visible) -> ctrlargs (serialargs) @ processing.c:415",
        "serialargs_get_ptr reads src from args->next (REE-derived) -> serialargs_get @ serializer.c:32",
        "TEE_MemMove(out, src, size) copies size bytes into TA memory @ serializer.c:34"
      ],
      "sink": "TEE_MemMove copying 'size' bytes from REE-derived src into TA memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls the REE-side serialargs buffer contents/length",
        "serialargs_get_ptr returns a src pointer and size is attacker-influenced or mismatched"
      ],
      "attack_scenario": "Maliciously crafted serialargs cause serialargs_get_ptr/serialargs_get to produce a src pointer or size that leads TEE_MemMove to copy out-of-bounds data into TA memory, leading to memory corruption or information exposure.",
      "impact": "Memory corruption in TA (crash or code execution) or reading unintended memory, depending on allocation/state."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:34",
        "recommendation": "Validate that src points to at least 'size' readable bytes and that 'out' has capacity >= size before TEE_MemMove; verify serialargs_get_ptr enforces these invariants."
      },
      {
        "type": "type_validation",
        "location": "callers of serialargs_get (processing.c:136,163)",
        "recommendation": "Ensure callers pass expected 'size' consistent with the serialized object's declared length and check return codes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove is invoked with 'src' derived from serialargs_get_ptr which reads REE-provided data",
        "No local sanitizer shown at this site validating 'size' or src/dst capacity"
      ],
      "negative_indicators": [
        "Callers of serialargs_get pass concrete sizes (sizeof(attr), sizeof(uint32_t)) which may limit attacker influence",
        "serialargs_get_ptr may perform internal validation (not visible here)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy reads from REE-derived memory into TA memory using a caller-supplied size without visible, sufficient validation at this program point, creating a realistic memory-safety risk (weak input validation).",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 34,
        "function": "serialargs_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove(out, src, size) copies potentially attacker-controlled 'size' bytes from REE-derived src into TA memory without local validation."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_key_pair:412-413",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to out_ref_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "Often passed as fixed sizes (sizeof(attr), sizeof(uint32_t)) at callers",
      "evidence": "processing.c:136,163"
    }
  ],
  "residual_risks": [
    "Line 34 memory-safety finding suppresses information-disclosure promotion (unencrypted_output) because dst is TA-private; however downstream copies into REE-visible memrefs exist elsewhere (processing.c:555) and should be reviewed."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from REE-derived src into TA memory at line 34",
      "No local bounds/sanity checks shown in function"
    ],
    "negative_indicators": [
      "Callers pass fixed-size 'size' arguments which may limit exploitability",
      "serialargs_get_ptr may internally validate (not visible)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Marked vulnerable due to weak input validation around a direct memory copy from REE-controlled data into TA memory with no visible guarantees that 'size' and 'src' are safe.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from REE-derived src into TA memory without explicit validation at this callsite.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but the copy is to shared memory.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #103: TA_InvokeCommandEntryPoint -> entry_create_object -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 101.34秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The call at line 34 moves data from an REE-derived source into a TA-private destination (TA stack/local), so it does not constitute unencrypted output to REE; no definitive bounds overflow is evident at this call-site given callers pass fixed expected sizes (e.g., sizeof(attr)), though upstream input-size handling is weak.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_create_object at lines [331, 517, 777, 1002, 1118]:
-- Call #1 at line 331 --
329: return rc;
330:
331: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
332: if (rc)
333: return rc;
-- Call #2 at line 517 --
515: return rc;
516:
517: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
518: if (rc)
519: return rc;
-- Call #3 at line 777 --
775: return rc;
776:
777: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
778: if (rc)
779: return rc;
-- Call #4 at line 1002 --
1000: return rc;
1001:
1002: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1003: if (rc)
1004: return rc;
-- Call #5 at line 1118 --
1116: return rc;
1117:
1118: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1119: if (rc)
1120: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "out",
      "attr",
      "orig_next",
      "p",
      "attr.attrs_size"
    ],
    "propagation": [
      {
        "lhs": "orig_next",
        "rhs": "args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:133"
      },
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr)) reads from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p (allocated output)",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size) copies from orig_next using attr.attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-141"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated buffer) assigned to caller pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 331,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases caller's ctrlargs which is initialized from REE-provided memref buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 331,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is &template (TA-local pointer) passed from caller; origin is TEE-private local.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "rule": "weak_input_validation",
      "why": "Uses attr.attrs_size (read from REE-originated input) to allocate and copy bytes via alloc_and_get without explicit validation of attrs_size bounds here.",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) (reads pointer derived from args->next)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 331,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases caller's ctrlargs initialized from REE-provided memref buffer (shared input).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is &session_handle (TA-local stack) at caller site; destination is TEE-private local storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args/REE input) into out without explicit local validation here; size is caller-provided.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len/size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "src",
        "rhs": "pointer derived from serialargs (args/REE input) or other caller buffer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided size argument to TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from serialargs/REE input) into out without local validation here; size is caller-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' at serialargs_get call is alias of caller-local buffer (e.g. &attr or &session_handle) - TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(caller_type)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'ptr' destination is TA-allocated buffer (TEE-private) receiving data from caller buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (possibly REE-originated) into ptr+buf0_sz without local size/sanity checks here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data (caller-provided) into buf + *blen without validating that destination has sufficient space here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies 'size' bytes from REE-derived src into a TA-local destination (out is caller-local &attr), so this line is not an REE disclosure sink; however size is caller-controlled and validated upstream only by callers.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call at line 34 moves data from an REE-derived source into a TA-private destination (TA stack/local), so it does not constitute unencrypted output to REE; no definitive bounds overflow is evident at this call-site given callers pass fixed expected sizes (e.g., sizeof(attr)), though upstream input-size handling is weak.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_create_object:321-323",
      "evidence": "ptypes == expected and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "size (serialargs_get caller)",
      "why_safe": "callers pass fixed sizeof(...) for known structures in some places (e.g., sizeof(attr))",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136; /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:325"
    }
  ],
  "residual_risks": [
    "alloc_and_get uses attr.attrs_size (from REE) to control allocation/copy (serializer.c:140) without explicit validation here",
    "TEE_MemMove calls at other sites (serializer.c:66,67,188) copy caller-controlled lengths into TA buffers without local checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "destination at line 34 is TA-local (&attr), not REE-visible",
      "callers often pass fixed sizes (sizeof(attr)) to serialargs_get"
    ],
    "negative_indicators": [
      "size argument originates from caller context and is used without local validation in serialargs_get/alloc_and_get",
      "serialargs_get_ptr implementation and its validations are not present in analyzed snippets"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 34 performs an in-TA copy (REE->TA) into a TA-private buffer with callers supplying expected fixed sizes in key paths; therefore it is not an unencrypted REE output. However, upstream weak input validation of variable lengths (attr.attrs_size and other size arguments) remains a structural risk deserving mitigation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Uses attr.attrs_size (from REE-derived input) to allocate and copy bytes without explicit bounds validation here.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Copies buf0_sz bytes from caller buffers into TA-allocated ptr without local robustness checks here.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Copies len bytes from data into buf + *blen without a local check that destination has sufficient space.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #104: TA_InvokeCommandEntryPoint -> entry_find_objects_init -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objects_initserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 122.71秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Memory-safety is primary; because serialargs_get_ptr is checked and callers supply concrete sizes, the copy at line 34 is protected; remaining concerns are structural and appear at other sites where untrusted sizes drive allocations/copies.

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: entry_find_objects_init
プロンプト 中間 (entry_find_objects_init)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_find_objects_init” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [292]:
-- Call #1 at line 292 --
290: break;
291: case PKCS11_CMD_FIND_OBJECTS_INIT:
292: >>> rc = entry_find_objects_init(client, ptypes, params);
293: break;
294: case PKCS11_CMD_FIND_OBJECTS:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

490: enum pkcs11_rc entry_find_objects_init(struct pkcs11_client *client,
491: uint32_t ptypes, TEE_Param *params)
492: { 493: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 494: TEE_PARAM_TYPE_NONE, 495: TEE_PARAM_TYPE_NONE, 496: TEE_PARAM_TYPE_NONE); 497: TEE_Param *ctrl = params; 498: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 499: struct serialargs ctrlargs = { }; 500: struct pkcs11_session *session = NULL; 501: struct pkcs11_session *sess = NULL; 502: struct pkcs11_object_head *template = NULL; 503: struct obj_attrs *req_attrs = NULL; 504: struct pkcs11_object *obj = NULL; 505: struct pkcs11_find_objects *find_ctx = NULL; 506: struct handle_db *object_db = NULL; 507: 508: if (!client || ptypes != exp_pt) 509: return PKCS11_CKR_ARGUMENTS_BAD; 510: 511: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 512: 513: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 514: if (rc) 515: return rc; 516: 517: rc = serialargs_alloc_get_attributes(&ctrlargs, &template); 518: if (rc) 519: return rc; 520: 521: if (serialargs_remaining_bytes(&ctrlargs)) { 522: rc = PKCS11_CKR_ARGUMENTS_BAD; 523: goto out; 524: } 525: 526: 527: if (session_is_active(session)) { 528: rc = PKCS11_CKR_OPERATION_ACTIVE; 529: goto out; 530: } 531: 532: if (session->find_ctx) { 533: EMSG("Active object search already in progress"); 534: rc = PKCS11_CKR_FUNCTION_FAILED; 535: goto out; 536: } 537: 538: rc = sanitize_client_object(&req_attrs, template, 539: sizeof(*template) + template->attrs_size, 540: PKCS11_UNDEFINED_ID, PKCS11_UNDEFINED_ID); 541: if (rc) 542: goto out; 543: 544: 545: find_ctx = TEE_Malloc(sizeof(*find_ctx), TEE_MALLOC_FILL_ZERO); 546: if (!find_ctx) { 547: rc = PKCS11_CKR_DEVICE_MEMORY; 548: goto out; 549: } 550: 551: TEE_Free(template); 552: template = NULL; 553: 554: switch (get_class(req_attrs)) { 555: case PKCS11_CKO_UNDEFINED_ID: 556: 557: case PKCS11_CKO_SECRET_KEY: 558: case PKCS11_CKO_PUBLIC_KEY: 559: case PKCS11_CKO_PRIVATE_KEY: 560: case PKCS11_CKO_DATA: 561: case PKCS11_CKO_CERTIFICATE: 562: break; 563: default: 564: EMSG("Find object of class %s (%"PRIu32") is not supported", 565: id2str_class(get_class(req_attrs)), 566: get_class(req_attrs)); 567: rc = PKCS11_CKR_ARGUMENTS_BAD; 568: goto out; 569: } 570: 571: 575: 576: 577: TAILQ_FOREACH(sess, get_session_list(session), link) { 578: LIST_FOREACH(obj, &sess->object_list, link) { 579: 584: if (obj->token) 585: continue; 586: 587: if (!attributes_match_reference(obj->attributes, 588: req_attrs)) 589: continue; 590: 591: rc = find_ctx_add(find_ctx, 592: pkcs11_object2handle(obj, session)); 593: if (rc) 594: goto out; 595: } 596: } 597: 598: object_db = get_object_handle_db(session); 599: 600: 601: LIST_FOREACH(obj, &session->token->object_list, link) { 602: uint32_t handle = 0; 603: bool new_load = false; 604: 605: if (!obj->attributes) { 606: rc = load_persistent_object_attributes(obj); 607: if (rc) { 608: rc = PKCS11_CKR_GENERAL_ERROR; 609: goto out; 610: } 611: 612: new_load = true; 613: } 614: 615: if (!obj->attributes || 616: check_access_attrs_against_token(session, 617: obj->attributes) || 618: !attributes_match_reference(obj->attributes, req_attrs)) { 619: if (new_load) 620: release_persistent_object_attributes(obj); 621: 622: continue; 623: } 624: 625: 626: handle = pkcs11_object2handle(obj, session); 627: if (!handle) { 628: handle = handle_get(object_db, obj); 629: if (!handle) { 630: rc = PKCS11_CKR_DEVICE_MEMORY; 631: goto out; 632: } 633: } 634: 635: rc = find_ctx_add(find_ctx, handle); 636: if (rc) 637: goto out; 638: } 639: 640: find_ctx->attributes = req_attrs; 641: req_attrs = NULL; 642: session->find_ctx = find_ctx; 643: find_ctx = NULL; 644: rc = PKCS11_CKR_OK; 645: 646: out: 647: TEE_Free(req_attrs); 648: TEE_Free(template); 649: release_find_obj_context(find_ctx); 650: 651: return rc; 652: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_find_objects_init", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_find_objects_init", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_find_objects_init)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_find_objects_init",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "template",
      "req_attrs",
      "session"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:497-498"
      },
      {
        "lhs": "ctrl->memref.buffer",
        "rhs": "caller-provided params[0].memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:511"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:513-515"
      },
      {
        "lhs": "template",
        "rhs": "serialargs_alloc_get_attributes(&ctrlargs, &template)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:517-519"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:493-496,508-510",
        "evidence": "exp_pt compared against ptypes; returns PKCS11_CKR_ARGUMENTS_BAD if mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:521-524",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked and errors out if remaining"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 292,
      "function": "entry_find_objects_init",
      "rule": "other",
      "why": "Call-site binding: callee 'client' parameter aliases caller 'client' value derived from tee_session (origin unclear).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(struct pkcs11_client),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_find_objects_init(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 292,
      "function": "entry_find_objects_init",
      "rule": "other",
      "why": "Call-site binding: callee 'params' parameter aliases caller 'params' (caller-provided memref buffer = REE-visible shared memory).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_find_objects_init(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 508,
      "function": "entry_find_objects_init",
      "rule": "weak_input_validation",
      "why": "ptypes must equal exp_pt (MEMREF_INOUT); caller may pass MEMREF_OUTPUT leading to type mismatch and potential misuse of params as input.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=sizeof(expected_memref)"
        ]
      },
      "code_excerpt": "if (!client || ptypes != exp_pt)\n    return PKCS11_CKR_ARGUMENTS_BAD;"
    }
  ]
}

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_find_objects_init at lines [517, 777, 1002, 1118]:
-- Call #1 at line 517 --
515: return rc;
516:
517: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
518: if (rc)
519: return rc;
-- Call #2 at line 777 --
775: return rc;
776:
777: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
778: if (rc)
779: return rc;
-- Call #3 at line 1002 --
1000: return rc;
1001:
1002: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1003: if (rc)
1004: return rc;
-- Call #4 at line 1118 --
1116: return rc;
1117:
1118: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1119: if (rc)
1120: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "args->next",
      "orig_next",
      "attr",
      "attr.attrs_size",
      "p",
      "out"
    ],
    "propagation": [
      {
        "lhs": "orig_next",
        "rhs": "args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:133-134"
      },
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143"
      },
      {
        "lhs": "*out",
        "rhs": "p",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145-146"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138",
        "evidence": "serialargs_get may validate presence of sizeof(attr) bytes before populating attr (error returned on rc)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143",
        "evidence": "alloc_and_get returns error on rc (presumed to validate lengths/availability)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 517,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases caller ctrlargs which wraps caller-provided memref.buffer (shared REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 517,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter (&template) binds to caller local 'template' (destination is TA-private allocation target).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=attr.attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "rule": "weak_input_validation",
      "why": "Uses attr.attrs_size (derived from untrusted serialized input) to allocate/copy via alloc_and_get; size-driven allocation/copy may be attacker-controlled.",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=orig_next_remaining,dst_sz=attr.attrs_size"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies src->out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr returns rc on error (implies validation of availability of 'size' bytes)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from untrusted serialargs) into out; size is caller-provided and may be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter aliases caller local 'attr' (TA-private) and 'args' wraps caller-provided memref.buffer (shared/REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr),src_sz=args->remaining,dst_sz=sizeof(attr)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter binds to caller local 'session_handle' (TA-private) while 'args' originates from caller serial buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->remaining,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) writes size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) writes buf0_sz bytes from buf0 to ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz",
        "rhs": "TEE_MemMove(ptr + buf0_sz, src, size) writes size bytes from src to ptr+buf0_sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "TEE_MemMove(buf + *blen, data, len) appends len bytes from data to buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller checks serialargs_get_ptr return code before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from untrusted serialargs) into out; size may be attacker-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' aliases caller-provided 'out' (TA-private) while src originates from serial buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TA-allocated buffer while source 'buf0' origin is unclear (could be TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (origin may be untrusted) into ptr+buf0_sz; size may be attacker-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'buf0' parameter bound at call-site; origin of buf0 is not shown (unknown region).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Appends len bytes from data into buf+*blen; 'len' and 'data' may be derived from untrusted input leading to overflow if not checked.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=orig_remaining,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'buf + *blen' aliases caller buffer 'buf' (TA-private) while 'data' originates externally (unknown/REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=data_len_unknown,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies fixed-size 'size' bytes from src (serialargs buffer) into out, but serialargs_get_ptr is checked before the copy, and callers invoke serialargs_get with concrete sizeof(...) sizes (e.g., sizeof(attr)), preventing an immediate overflow or over-read at this site.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serial buffer (params[0].memref.buffer)",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs (object.c:511)",
        "ctrlargs -> serialargs_get_ptr -> src (serializer.c:32)",
        "src -> TEE_MemMove(out, src, size) (serializer.c:34)"
      ],
      "sink": "TEE_MemMove(out, src, size) in serialargs_get (serializer.c:34)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed/insufficient serialized data in params[0] memref",
        "Callers pass an attacker-controlled 'size' to serialargs_get (but in practice callers pass concrete sizeof values)"
      ],
      "attack_scenario": "If serialargs_get_ptr did not validate that 'size' bytes are available at src, an over-read or out-of-bounds copy could occur; here serialargs_get_ptr returns error on insufficiency, preventing exploitation at this site.",
      "impact": "Potential memory-safety issues (over-read/overflow) or corruption inside TA if checks were absent; not exploitable at this site due to checks."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr explicitly validates requested 'size' against remaining bytes and document its contract"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr return is checked before TEE_MemMove (serializer.c:32-34)",
        "Callers use fixed sizeof(...) sizes when invoking serialargs_get"
      ],
      "negative_indicators": [
        "Some alloc/copy sites use attr.attrs_size derived from untrusted input (serializer.c:140) which could be attacker-controlled if not validated elsewhere"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety is primary; because serialargs_get_ptr is checked and callers supply concrete sizes, the copy at line 34 is protected; remaining concerns are structural and appear at other sites where untrusted sizes drive allocations/copies.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The specific TEE_MemMove at line 34 performs a copy only after serialargs_get_ptr returned success and callers use fixed-size arguments, so sanitization at that program point prevents exploitation.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get_ptr:serializer.c:32",
      "evidence": "serialargs_get_ptr return code is checked before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "entry_find_objects_init:object.c:493-510",
      "evidence": "ptypes compared against expected exp_pt and error returned on mismatch"
    }
  ],
  "argument_safety": [
    {
      "arg": "size (serialargs_get caller)",
      "why_safe": "Called with concrete sizeof(...) values (e.g., sizeof(attr), sizeof(uint32_t))",
      "evidence": "serializer.c:136, serializer.c:163"
    },
    {
      "arg": "args / ctrl->memref.buffer",
      "why_safe": "Validated via serialargs_get_ptr and serialargs_remaining_bytes checks earlier in call chain",
      "evidence": "object.c:511, object.c:521-524, serializer.c:32"
    }
  ],
  "residual_risks": [
    "serializer.c:140 - alloc_and_get uses attr.attrs_size (derived from serialized input) to allocate/copy; if attr.attrs_size is attacker-controlled and not fully validated, this can lead to allocation/overflow risks",
    "serializer.c:188 - append using len/data may overflow target buffer if caller-controlled lengths not checked"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Checked return of serialargs_get_ptr before copy",
      "Callers use fixed-size copy lengths for these serial reads"
    ],
    "negative_indicators": [
      "Some downstream uses of untrusted size fields (attr.attrs_size) could present memory-safety issues elsewhere"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 34 is not vulnerable because appropriate pre-copy checks exist at that program point; other structural risks remain elsewhere in the chain and should be addressed separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=orig_next_remaining,dst_sz=attr.attrs_size"
        ]
      },
      "why": "Uses attr.attrs_size (from untrusted serialized input) to allocate and copy data; attacker-controlled size may cause allocation or copy issues",
      "code_excerpt": "alloc_and_get(..., attr.attrs_size)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=orig_remaining,dst_sz=*blen + len"
        ]
      },
      "why": "Appends data using len derived from untrusted input; possible overflow if buffer capacity not enforced",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 517,
      "function": "entry_find_objects_init",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: serialargs args originate from caller memref (shared/REE-visible); ensure caller buffer is validated",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}
フロー #105: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 108.14秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

信頼度: LOW

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [777, 1002, 1118]:
-- Call #1 at line 777 --
775: return rc;
776:
777: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
778: if (rc)
779: return rc;
-- Call #2 at line 1002 --
1000: return rc;
1001:
1002: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1003: if (rc)
1004: return rc;
-- Call #3 at line 1118 --
1116: return rc;
1117:
1118: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1119: if (rc)
1120: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "out",
      "attr",
      "orig_next",
      "p"
    ],
    "propagation": [
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "orig_next",
        "rhs": "args->next (saved at entry)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:133"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated/copy of attributes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138",
        "evidence": "rc checked after serialargs_get"
      },
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143",
        "evidence": "rc checked after alloc_and_get"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 777,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &ctrlargs (which references REE-provided memref buffer) passed as 'args' parameter; argument origins include REE-visible bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 777,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &template (address of TA-local pointer) passed as 'out' to receive allocated object (TEE-private destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_object_head *)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &ctrlargs (wrapping REE memref) passed as 'args' parameter; origin of underlying buffer is REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &template passed as 'out' to receive allocated/copy buffer (TA-private), caller expects template pointer back.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_object_head *)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &ctrlargs (derived from REE memref) passed as 'args' parameter; underlying next pointer may point into REE-visible memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Binding: &template passed as 'out' to receive allocated attributes (TA-private pointer returned to caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_object_head *)"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "rc from serialargs_get_ptr checked before performing TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'args' parameter originates from &ctrlargs (which wraps REE memref buffer) passed into serialargs_get; underlying buffer is REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'out' argument (&attr) is a TA-local destination (stack) receiving bytes copied from possibly REE-originating 'args'.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'args' parameter (used to read session_handle) derives from caller-controlled serialargs wrapping REE buffer; source is REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'out' argument (&session_handle) is TA-local destination receiving bytes read from args; potential untrusted input copied into TA memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr",
        "rhs": "buf0 and src concatenated via TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data via TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "serialargs_get_ptr return checked before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from 'src' (may point into REE-originated serialargs buffer) into 'out' (TA-local destination), propagating untrusted input into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 (from orig_next/serialargs) into allocated ptr; source likely REE-origin and destination TEE-private, possible untrusted data concatenation without explicit bounds check here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'src' into ptr+offset (constructed buffer); 'src' may be REE-originated and write uses computed pointer arithmetic (ptr+buf0_sz).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'data' into buf+*blen; source provenance unclear (may be REE or TA); destination is TA buffer updated with new length—possible overflow risk if bounds not enforced here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen)+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove at line 34 copies a fixed-size chunk (size argument) from a source returned by serialargs_get_ptr into a TA-local destination; the call-site checks serialargs_get_ptr return but there is no evidence here of a bounds/overflow condition or of secret data being written to REE from this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "low"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "At the evaluated sink (line 34) data flows from REE-derived serialargs into TA-local memory with the source-resolver return checked; size is caller-supplied but concretely invoked with fixed sizeof(...) at call sites, and no evidence of secret→REE copy or unchecked overflow at this line.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serialargs_get:32-34",
      "evidence": "rc from serialargs_get_ptr checked before performing TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "entry_get_attribute_value:745-765",
      "evidence": "ptypes == exp_pt check"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs wrapping ctrl->memref.buffer)",
      "why_safe": "serialargs_get_ptr return is checked before use",
      "evidence": "serializer.c:32-34"
    },
    {
      "arg": "size",
      "why_safe": "size is passed as fixed sizeof(...) at call sites (e.g., sizeof(attr), sizeof(uint32_t))",
      "evidence": "serializer.c:136, object.c:773"
    }
  ],
  "residual_risks": [
    "line 34: source pointer provenance and internal bounds/validations performed by serialargs_get_ptr are not visible here; if serialargs_get_ptr is flawed it could still enable over-read or malformed input into TA memory",
    "line 910: copying 'template' into out->memref.buffer (REE-visible) may expose attributes including sensitive ones (attr_sensitive flagged earlier) — structural risk",
    "line 366: TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc)) writes into REE-visible memref (MEMREF_OUTPUT) — structural risk (public rc but structural)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return is checked before the copy",
      "size argument at call sites is a fixed sizeof(...) preventing variable-length copy at this site"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation and its bounds checks are not available here",
      "upstream data originates from REE memrefs (untrusted)"
    ],
    "confidence_level": "low"
  },
  "decision_rationale": "The evaluated sink at line 34 performs a bounded copy into TA-local memory with a return check on the pointer resolver; there is no direct evidence of an overflow or of secret data being leaked to REE at that exact line, so it is not marked vulnerable. However, there are structural risks elsewhere in the chain (notably the copy at line 910 to an REE-visible buffer) and unknowns in serialargs_get_ptr warrant caution.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-owned 'template' (which may include attributes marked sensitive earlier) into REE-visible out->memref.buffer, potentially exposing attribute data.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); rc is non-sensitive but operation writes into shared memory.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "why": "Concatenates pieces read from serialargs into allocated buffer without an explicit bounds check visible here.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "some_helper",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen)+len"
        ]
      },
      "why": "Writes data into buf + *blen using a length 'len'—bounds at this point are not evident, posing potential overflow risk.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #106: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 104.68秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The sink at line 34 performs a copy from REE-derived src into TA-private memory; because the copy direction is into TA (not to REE), it does not constitute an unencrypted output. There is no explicit evidence of a bounds overflow at this call-site, so we do not mark it vulnerable. However, upstream weak input validation on sizes (attr.attrs_size and alloc_and_get) presents a structural risk.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1002, 1118]:
-- Call #1 at line 1002 --
1000: return rc;
1001:
1002: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1003: if (rc)
1004: return rc;
-- Call #2 at line 1118 --
1116: return rc;
1117:
1118: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1119: if (rc)
1120: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "args->next",
      "orig_next",
      "attr",
      "attr.attrs_size",
      "p",
      "out"
    ],
    "propagation": [
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143"
      },
      {
        "lhs": "*out",
        "rhs": "p (allocated and filled from caller-provided buffer via alloc_and_get)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136",
        "evidence": "serialargs_get reads fixed-size pkcs11_object_head structure (sizeof(attr))"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1002,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "alias of caller-provided serialargs (ctrlargs derived from params->memref.buffer) passed into callee; origin is REE-visible shared memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=ctrl->memref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1002,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "alias of callee out-parameter bound to &template (TEE-private) at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "rule": "weak_input_validation",
      "why": "attr.attrs_size (derived from reader over caller buffer) is used as allocation/copy length in alloc_and_get without explicit validation of bounds here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "args->next"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (copied from src)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34-35"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1002,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller-provided 'args' (ctrlargs derived from params->memref.buffer) is passed as serialargs pointer; origin is REE-visible shared memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=ctrl->memref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1002,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out parameter is &attr (callee stack) bound to caller local; destination is TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr),src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller-provided 'args' passed from upstream call-site (second call) is REE-origin serialargs buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=ctrl->memref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from args) to out without additional bounds validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr, ptr + buf0_sz",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size) assemble into allocated buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "TEE_MemMove(buf + *blen, data, len) appends data of length len",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from serialargs, likely REE-origin) to out without local bounds validation at this call-site",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "First call copies buf0_sz bytes from buf0 (origin unclear) into ptr; source/destination origins not fully validated here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Second call copies 'size' bytes from src (likely REE-derived) into ptr+buf0_sz without explicit bounds check here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Appends 'len' bytes from data into buf + *blen without visible bounds validation at this site",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "This TEE_MemMove copies a fixed-size header (out <- src) where src is derived from REE-provided serialargs; the copy direction is REE->TA (not TA->REE) and no evidence shows a memory-safety overflow at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params->memref.buffer (REE-visible shared)",
      "propagation_path": [
        "params->memref.buffer -> ctrlargs (entry_set_attribute_value:992)",
        "ctrlargs -> serialargs_alloc_get_attributes / serialargs_get (serializer.c:136)",
        "serialargs_get_ptr -> src (serializer.c:32) -> TEE_MemMove(out, src, size) (serializer.c:34)"
      ],
      "sink": "TEE_MemMove(out, src, size) in serialargs_get (copies into TA-private out)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls contents of params memref buffer",
        "serialargs parsing functions do not validate sizes sufficiently"
      ],
      "attack_scenario": "Malicious REE crafts serialargs so alloc_and_get/serialargs_get_ptr return a manipulated src pointer or size causing out-of-bounds read/write in downstream code (not demonstrated at this exact TEE_MemMove call)",
      "impact": "Potential memory-safety corruption in TA if earlier bounds checks are absent; no direct REE data leakage from this call"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32-34",
        "recommendation": "Ensure serialargs_get_ptr validates available bytes >= size and return error otherwise; validate size against expected maxima before copying"
      },
      {
        "type": "type_validation",
        "location": "object.c:1002",
        "recommendation": "Validate template.attrs_size and other length fields read from REE before using them to allocate or compute sizes"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get checks rc from serialargs_get_ptr before copying (serializer.c:32-34)",
        "entry_set_attribute_value validates ptypes against expected exp_pt (object.c:974-991)"
      ],
      "negative_indicators": [
        "implementation of serialargs_get_ptr and alloc_and_get not shown; attr.attrs_size used as allocation length without explicit validation in this function (serializer.c:140)",
        "origin of args is REE-visible shared memory (params memref) which is attacker-controlled"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The sink at line 34 performs a copy from REE-derived src into TA-private memory; because the copy direction is into TA (not to REE), it does not constitute an unencrypted output. There is no explicit evidence of a bounds overflow at this call-site, so we do not mark it vulnerable. However, upstream weak input validation on sizes (attr.attrs_size and alloc_and_get) presents a structural risk.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The TEE_MemMove at line 34 moves data from REE into TA-private memory and lacks direct evidence of an overflow or a disclosure to REE; sanitizers/checks at call sites (ptypes match and serialargs_get return check) reduce but do not eliminate risk.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "object.c:974-991",
      "evidence": "ptypes compared to exp_pt and function returns on mismatch"
    },
    {
      "type": "return_check",
      "location": "serializer.c:32-34",
      "evidence": "serialargs_get checks rc from serialargs_get_ptr and only calls TEE_MemMove when rc == 0"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs / ctrlargs)",
      "why_safe": "partially — serialargs_get_ptr may enforce bounds (checked via rc) before copying",
      "evidence": "serializer.c:32-34"
    },
    {
      "arg": "out (caller local attr)",
      "why_safe": "destination is TA-private stack/heap local; size is fixed (sizeof(attr)) at this call",
      "evidence": "serializer.c:136 (call site uses sizeof(attr))"
    }
  ],
  "residual_risks": [
    "line 34: upstream weak_input_validation (attr.attrs_size used in alloc_and_get) could still lead to memory-safety issues elsewhere if alloc_and_get/serialargs_get_ptr do not fully validate bounds"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "checks of ptypes and serialargs_get return code present",
      "copy size at this call is a fixed sizeof(attr) at the call-site"
    ],
    "negative_indicators": [
      "alloc_and_get uses attr.attrs_size as copy/alloc length without explicit validation in that function",
      "internal implementations of serialargs_get_ptr and alloc_and_get not shown"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the copy direction (REE->TA), lack of evidence of overflow at this call, and presence of some checks (ptypes, rc), the line is not classified as a vulnerability. However, upstream weak input validation (attrs_size usage and alloc_and_get) remains a structural concern that could lead to memory-safety issues elsewhere.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "attr.attrs_size (read from REE-provided buffer) is used as allocation/copy length in alloc_and_get without explicit validation here",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "why": "Assembly copies into allocated buffer using buf0_sz and size without visible bounds checks here",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "caller-provided params memref.buffer passed into serialargs functions (aliasing REE-visible shared buffer)",
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    }
  ]
}
フロー #107: TA_InvokeCommandEntryPoint -> entry_copy_object -> serialargs_alloc_get_attributes -> serialargs_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectserialargs_alloc_get_attributesserialargs_getTEE_MemMove

実行時間: 111.68秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided serialargs buffer (ctrl->memref.buffer)

シンク: TEE_MemMove(out, src, size) in serialargs_get (serializer.c:34)

判定理由: Although some callers pass fixed safe sizes, serialargs_get itself performs a raw memmove of 'size' bytes from a source derived from REE without validating the destination capacity at this program point; this is a generic weak-input-validation memory-safety issue warranting reporting.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_alloc_get_attributes
プロンプト 中間 (serialargs_alloc_get_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_alloc_get_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1118]:
-- Call #1 at line 1118 --
1116: return rc;
1117:
1118: >>> rc = serialargs_alloc_get_attributes(&ctrlargs, &template);
1119: if (rc)
1120: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

128: enum pkcs11_rc serialargs_alloc_get_attributes(struct serialargs *args,
129: struct pkcs11_object_head **out)
130: { 131: struct pkcs11_object_head attr = { }; 132: enum pkcs11_rc rc = PKCS11_CKR_OK; 133: char *orig_next = args->next; 134: void *p = NULL; 135: 136: rc = serialargs_get(args, &attr, sizeof(attr)); 137: if (rc) 138: return rc; 139: 140: rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, 141: attr.attrs_size); 142: if (rc) 143: return rc; 144: 145: *out = p; 146: 147: return PKCS11_CKR_OK; 148: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_alloc_get_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_alloc_get_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_alloc_get_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_alloc_get_attributes",
    "tainted_vars": [
      "args",
      "out",
      "attr",
      "orig_next",
      "p",
      "attr.attrs_size",
      "args->next"
    ],
    "propagation": [
      {
        "lhs": "attr",
        "rhs": "serialargs_get(args, &attr, sizeof(attr)) reads from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138"
      },
      {
        "lhs": "p",
        "rhs": "alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size) copies attrs from args->next into allocated p",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:140-143"
      },
      {
        "lhs": "*out",
        "rhs": "p assigned to *out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:145"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-138",
        "evidence": "serialargs_get returns error on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases ctrlargs which references caller's ctrl->memref.buffer (reader over REE-provided bytes)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is &template (caller pointer to be populated) - caller-owned TA pointer passed by reference",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object_head *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "rule": "weak_input_validation",
      "why": "Uses attr.attrs_size (derived from REE-provided bytes read into 'attr') as length for alloc_and_get without an explicit upper bound check",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=attr.attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 145,
      "function": "serialargs_alloc_get_attributes",
      "rule": "other",
      "why": "Assigns allocated pointer 'p' to caller-provided out; propagates TA-private allocation back to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*out = p;"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [136, 163]:
-- Call #1 at line 136 --
134: void *p = NULL;
135:
136: >>> rc = serialargs_get(args, &attr, sizeof(attr));
137: if (rc)
138: return rc;
-- Call #2 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) -> src derived from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src into out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "serialargs_get_ptr returns rc and serialargs_get checks rc before MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs which references ctrl->memref.buffer (REE-provided)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 136,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter (&attr) is caller-local TA storage provided to receive bytes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(attr),src_sz=unknown,dst_sz=sizeof(attr)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &attr, sizeof(attr));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter (&session_handle) is caller-local TA variable to receive data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Performs TEE_MemMove(out, src, size) using size derived from caller without explicit upper-bound here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "copy from src of length size (TEE_MemMove semantics)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dest",
        "rhs": "copy from src of length buf0_sz then from src of length size (alloc_and_get usage)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "copy from data of length len",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller (serialargs_get) checks rc from serialargs_get_ptr before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args->next, REE-provided) into caller dest without an upper-bound check here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies buf0_sz bytes from buf0 (likely REE-provided) into allocated ptr without visible bounds check here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (from args) into ptr+buf0_sz without explicit bounds check here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies len bytes from data into buf + *blen; len and *blen derived from caller-controlled values without local upper-bound here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'size' bytes from src (derived from REE-provided args->next) into out with no local upper-bound check here; size may be attacker-influenced in general callers.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "ctrl->memref.buffer -> ctrlargs (object.c:1108)",
        "serialargs_get_ptr reads src from args->next -> serialargs_get (serializer.c:32)",
        "TEE_MemMove(out, src, size) copies size bytes into out (serializer.c:34)"
      ],
      "sink": "TEE_MemMove(out, src, size) in serialargs_get (serializer.c:34)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or crafts REE-side serialized args buffer content",
        "A caller invokes serialargs_get with a size that leads to copying more bytes than the destination out can safely hold (or serialargs_get_ptr returns a src within REE buffer but size not validated against out capacity)"
      ],
      "attack_scenario": "Malicious REE-supplied serialized data causes serialargs_get to copy excessive bytes into TA memory, potentially causing memory corruption or information disclosure depending on out buffer usage.",
      "impact": "Memory corruption within the TA (possible crash or code execution) or reading unintended data into TA structures."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:34",
        "recommendation": "Validate that 'size' does not exceed the actual capacity of 'out' before calling TEE_MemMove; ensure serialargs_get_ptr provides a length-limited view and that callers pass correct, validated sizes."
      },
      {
        "type": "type_validation",
        "location": "alloc_and_get:140",
        "recommendation": "Validate attr.attrs_size against a sane maximum before allocating and copying to prevent oversized allocations or copies."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove copies attacker-controlled source derived from serialargs (REE-visible)",
        "No explicit upper-bound check in serialargs_get for 'out' capacity at the memmove site"
      ],
      "negative_indicators": [
        "Callers of serialargs_get frequently pass fixed, small sizes (e.g., sizeof(attr), sizeof(uint32_t)) which are safe in those call sites",
        "serialargs_get checks return code from serialargs_get_ptr before memmove (some validation present upstream)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Although some callers pass fixed safe sizes, serialargs_get itself performs a raw memmove of 'size' bytes from a source derived from REE without validating the destination capacity at this program point; this is a generic weak-input-validation memory-safety issue warranting reporting.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 34,
        "function": "serialargs_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies 'size' bytes from REE-derived src into out without an explicit bounds check of out's capacity at the memmove site."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get checks rc from serialargs_get_ptr and returns on error"
    },
    {
      "type": "type_validation",
      "location": "entry_copy_object:1104-1106",
      "evidence": "caller validates ptypes and out->memref.size == sizeof(obj_handle) for that specific call-site"
    }
  ],
  "argument_safety": [
    {
      "arg": "size (serialargs_get parameter)",
      "why_safe": "In observed call-sites size is a fixed compile-time sizeof(...) (e.g., sizeof(attr), sizeof(uint32_t))",
      "evidence": "object.c:1116 (sizeof(attr)), object.c:163 (sizeof(uint32_t))"
    }
  ],
  "residual_risks": [
    "34: possible info-disclosure to REE was considered but suppressed since dst at this line is TA-private (memory-safety prioritized)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct memmove of untrusted-derived src using caller-supplied size"
    ],
    "negative_indicators": [
      "Callers in this codepath use fixed small sizes and some upstream checks exist"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Ranked as a memory-safety weak-input-validation vulnerability because an untrusted source is copied using a size parameter without local destination-capacity validation; caller-patterns reduce practical impact in observed sites but do not remove the root weakness.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=attr.attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses attr.attrs_size (derived from REE-provided bytes) as length for alloc_and_get without explicit upper bound check.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: callee 'args' aliases ctrlargs which references caller's ctrl->memref.buffer (REE-provided).",
      "code_excerpt": "rc = serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); noted as structural risk though not promoted to unencrypted_output here.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #108: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 98.22秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 34 transfers a fixed small value (uint32_t) into TA-private memory and is guarded by serialargs_get_ptr/rv; no evidence of overflow or secret being written to REE at this call-site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [228, 417, 608, 714, 865, 1083, 1137]:
-- Call #1 at line 228 --
226: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
227:
228: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
229: if (rc)
230: return rc;
-- Call #2 at line 417 --
415: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
416:
417: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
418: if (rc)
419: return rc;
-- Call #3 at line 608 --
606: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
607:
608: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
609: if (rc)
610: return rc;
-- Call #4 at line 714 --
712: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
713:
714: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
715: if (rc)
716: return rc;
-- Call #5 at line 865 --
863: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
864:
865: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
866: if (rc)
867: return rc;
-- Call #6 at line 1083 --
1081: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1082:
1083: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1084: if (rc)
1085: return rc;
-- Call #7 at line 1137 --
1135: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1136:
1137: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1138: if (rc)
1139: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get ensures bytes available to read session_handle (returns error if not)"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result checked and returns SESSION_HANDLE_INVALID if NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 228,
      "function": "entry_generate_secret",
      "rule": "other",
      "why": "alias of serialargs structure (initialized from caller ctrl->memref.buffer) passed as 'args' parameter; origin is caller-provided REE-visible buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 228,
      "function": "entry_generate_secret",
      "rule": "other",
      "why": "client pointer (origin tee_session2client) forwarded into callee; provenance not proven TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 228,
      "function": "entry_generate_secret",
      "rule": "other",
      "why": "address of local 'session' variable passed as out-parameter; callee writes session pointer back into caller (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out (written)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr likely validates available bytes for 'size' (caller checks rc)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of serialargs structure (initialized from caller ctrl->memref.buffer) is passed as 'args' (originates from REE-visible memref)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller-provided output pointer (&session_handle) passed as 'out' to callee; callee writes into caller stack/TA-private memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from REE-provided serialargs) into out without further type/value validation of contents",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "if (!rc)\n\tTEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst (written)",
        "rhs": "TEE_MemMove(dst, src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "dst (written)",
        "rhs": "TEE_MemMove(dst, src, n) (general)",
        "site": "serializer.c:general"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "serializer.c:32-34",
        "evidence": "caller (serialargs_get_ptr) is expected to validate availability of 'n' bytes before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from REE-provided serialargs) into caller 'out' without validating content beyond size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: ptr/dst is target buffer (allocated locally) while buf0/src origins vary; pointer arguments forwarded into TEE_MemMove from upstream callers",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=buf0_sz/size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: second copy into ptr+offset uses src (possibly REE-origin) and caller-controlled offset arithmetic",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data into buf + *blen where *blen and len may be influenced by caller data; offset/length not validated here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(buf_size - *blen)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies sizeof(uint32_t) from src into &session_handle; serialargs_get_ptr (called immediately before) and caller check (rv) provide a bounds/availability check for the requested size, and destination is TA-private, so no REE exfiltration at this line.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 34 transfers a fixed small value (uint32_t) into TA-private memory and is guarded by serialargs_get_ptr/rv; no evidence of overflow or secret being written to REE at this call-site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get_ptr called before TEE_MemMove and serialargs_get checks rc"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:163-165",
      "evidence": "caller requests sizeof(uint32_t) and handles rc"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "validated by serialargs_get_ptr which ensures requested bytes available",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out (&session_handle)",
      "why_safe": "caller allocates local uint32_t and passes its address; size matches sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
    }
  ],
  "residual_risks": [
    "weak_input_validation at TEE_MemMove sites: content of copied bytes originates from REE and is not value-validated (could influence control or semantic correctness downstream)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed-size copy of sizeof(uint32_t)",
      "serialargs_get_ptr prior check and rc handling",
      "destination is TA-private stack variable"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here (assumed to validate available bytes)",
      "content of copied uint32_t (session_handle) is derived from REE and later used for session lookup"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety checks (bounds/availability) appear present and destination is TA-private, so the specific TEE_MemMove at line 34 is not a vulnerability for overflow or REE exfiltration; however the copied value is REE-controlled and later used, so weak input validation remains a structural risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from src (derived from REE-provided serialargs) into out without validating the semantic/value of the data.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 228,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "why": "serialargs structure initialized from caller memref is passed into parsing helpers; origin is REE-visible.",
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serializer.c",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(buf_size - *blen)"
        ]
      },
      "why": "Copy into buffer at offset *blen uses caller-influenced length/offset without local validation here.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #109: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 140.25秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [417, 608, 714, 865, 1083, 1137]:
-- Call #1 at line 417 --
415: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
416:
417: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
418: if (rc)
419: return rc;
-- Call #2 at line 608 --
606: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
607:
608: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
609: if (rc)
610: return rc;
-- Call #3 at line 714 --
712: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
713:
714: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
715: if (rc)
716: return rc;
-- Call #4 at line 865 --
863: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
864:
865: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
866: if (rc)
867: return rc;
-- Call #5 at line 1083 --
1081: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1082:
1083: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1084: if (rc)
1085: return rc;
-- Call #6 at line 1137 --
1135: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1136:
1137: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1138: if (rc)
1139: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get() returns rv which is checked and propagated"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-170",
        "evidence": "pkcs11_handle2session() result checked and returns SESSION_HANDLE_INVALID if null"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 417,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of shared ctrlargs (backed by ctrl->memref.buffer from REE) passed as 'args' into function",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs*),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 417,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "client pointer passed through from caller into callee; origin not validated here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_client*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 417,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "caller supplies address of local session pointer as output parameter (&session) bound into callee 'sess'",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads a uint32_t session_handle from REE-backed args and uses it to lookup a session handle",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->available_bytes,dst_sz=sizeof(session_handle)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "caller-provided out pointer (argument)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27-34"
      },
      {
        "lhs": "out (contents)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr() return code rc is checked before performing the copy"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 417,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of caller-provided serialargs structure (backed by REE memref buffer) passed as 'args' into serialargs_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs*),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 417,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller passes address of local session_handle as 'out' parameter into serialargs_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(session_handle)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Performs TEE_MemMove(out, src, size) where src originates from args (likely REE-backed) and size is caller-controlled; limited check relies on serialargs_get_ptr correctness",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->available_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst (callee dst)",
        "rhs": "caller-provided dst pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "src (callee src)",
        "rhs": "caller-provided src pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided size/len argument",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (originating from serialargs_get_ptr -> args, REE-backed) into caller 'out' without additional local bounds verification",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->available_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: 'out' argument is caller-supplied (e.g. &session_handle) passed into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: 'src' argument originates from serialargs_get_ptr(args) which is backed by REE memref buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination 'ptr' passed into TEE_MemMove from caller context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source 'buf0' passed into TEE_MemMove; provenance unclear",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination ptr+buf0_sz passed into TEE_MemMove (pointer arithmetic may alias buffers)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source 'src' passed into TEE_MemMove here; provenance unclear at this call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination buf + *blen passed into TEE_MemMove (destination may be shared or local depending on caller)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source 'data' passed into TEE_MemMove; provenance (REE vs TEE) not clear here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(uint32_t) from src (obtained via serialargs_get_ptr) into caller out; serialargs_get_ptr return is checked before the copy and the call-site requests a fixed size (sizeof(uint32_t)). No sensitive data is being exported to REE here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "high"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 34 writes a fixed sizeof(uint32_t) into a TA-local out buffer after serialargs_get_ptr succeeds; there is an explicit rc check that prevents the copy when src is invalid, and the data is not sensitive being returned to REE.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get_ptr() return code is checked (rc) before performing TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "serialargs_get_ptr validates availability before providing src",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out",
      "why_safe": "caller provides out as address of local uint32_t (session_handle) and copy length is sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33 and serializer call-site serialargs_get(..., &session_handle, sizeof(uint32_t))"
    }
  ],
  "residual_risks": [
    "line 34: reliance on serialargs_get_ptr correctness; if that function is flawed the copy may read out-of-bounds"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit rc check before TEE_MemMove at serialargs_get",
      "fixed small copy length (sizeof(uint32_t)) at call-site"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here; correctness assumed"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (serialargs_get_ptr rc) precede the copy and call-site requests a fixed small size; data copied is not sensitive, so no information-disclosure classification applies.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are not treated as sensitive here but destination is shared.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 350,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_client*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Alias: client pointer from caller bound into callee entry_generate_key_pair; origin not validated here",
      "code_excerpt": "rc = entry_generate_key_pair(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 350,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Alias: caller-provided params (shared memrefs) passed into callee; params contain REE-visible buffers",
      "code_excerpt": "rc = entry_generate_key_pair(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->available_bytes,dst_sz=unknown"
        ]
      },
      "why": "Performs TEE_MemMove(out, src, size) where src originates from args (likely REE-backed) and size is caller-controlled; relies on serialargs_get_ptr correctness",
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #110: TA_InvokeCommandEntryPoint -> entry_release_active_processing -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_release_active_processingserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 136.88秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The sink at line 34 copies REE-controlled bytes into TA-private memory, but sanitizers (serialargs_get_ptr success check and subsequent pkcs11_handle2session validation) prevent out-of-bounds or unchecked session usage at this program point; the copy direction is into TA, not to REE, so it does not meet unencrypted_output promotion criteria.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: entry_release_active_processing
プロンプト 中間 (entry_release_active_processing)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_release_active_processing” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [323]:
-- Call #1 at line 323 --
321: break;
322: case PKCS11_CMD_RELEASE_ACTIVE_PROCESSING:
323: >>> rc = entry_release_active_processing(client, ptypes, params);
324: break;
325: case PKCS11_CMD_DIGEST_INIT:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

1063: enum pkcs11_rc entry_release_active_processing(struct pkcs11_client *client,
1064: uint32_t ptypes,
1065: TEE_Param *params)
1066: { 1067: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1068: TEE_PARAM_TYPE_NONE, 1069: TEE_PARAM_TYPE_NONE, 1070: TEE_PARAM_TYPE_NONE); 1071: TEE_Param *ctrl = params; 1072: enum pkcs11_rc rc = PKCS11_CKR_OK; 1073: struct serialargs ctrlargs = { }; 1074: struct pkcs11_session *session = NULL; 1075: enum processing_func function = PKCS11_FUNCTION_UNKNOWN; 1076: uint32_t cmd = 0; 1077: 1078: if (!client || ptypes != exp_pt) 1079: return PKCS11_CKR_ARGUMENTS_BAD; 1080: 1081: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1082: 1083: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1084: if (rc) 1085: return rc; 1086: 1087: rc = serialargs_get_u32(&ctrlargs, &cmd); 1088: 1089: if (serialargs_remaining_bytes(&ctrlargs)) 1090: return PKCS11_CKR_ARGUMENTS_BAD; 1091: 1092: function = func_for_cmd(cmd); 1093: if (function == PKCS11_FUNCTION_UNKNOWN) 1094: return PKCS11_CKR_ARGUMENTS_BAD; 1095: 1096: rc = get_active_session(session, function); 1097: if (rc) 1098: return rc; 1099: 1100: release_active_processing(session); 1101: 1102: DMSG("PKCS11 session %"PRIu32": release processing", session->handle); 1103: 1104: return PKCS11_CKR_OK; 1105: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_release_active_processing", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_release_active_processing", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_release_active_processing)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_release_active_processing",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs",
      "session",
      "cmd"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1071"
      },
      {
        "lhs": "ctrlargs (buffer/size)",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1081"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session) (parsed from ctrlargs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1083-1085"
      },
      {
        "lhs": "cmd",
        "rhs": "serialargs_get_u32(&ctrlargs, &cmd) (parsed from ctrlargs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1087"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1067-1070,1078-1079",
        "evidence": "ptypes must equal expected TEE_PARAM_TYPES or function returns PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "length_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1089-1090",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked and returns error if leftover"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 323,
      "function": "entry_release_active_processing",
      "rule": "other",
      "why": "caller-provided params pointer is passed into callee (alias of shared buffer passed into helper).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_release_active_processing(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 323,
      "function": "entry_release_active_processing",
      "rule": "other",
      "why": "client pointer (derived from tee_session) is forwarded to callee; origin uncertain (tainted by caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_client*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_release_active_processing(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1081,
      "function": "entry_release_active_processing",
      "rule": "weak_input_validation",
      "why": "Parses session handle and cmd from caller-controlled memref buffer without strong content validation beyond remaining-bytes check.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_release_active_processing at lines [1083, 1137]:
-- Call #1 at line 1083 --
1081: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1082:
1083: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1084: if (rc)
1085: return rc;
-- Call #2 at line 1137 --
1135: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1136:
1137: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1138: if (rc)
1139: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session",
      "rv"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167"
      },
      {
        "lhs": "*sess",
        "rhs": "session (assigned to caller-provided output pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns rv which is checked and immediately returned on error"
      },
      {
        "kind": "validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result is checked and error returned if NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1083,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "args (serialargs*) is alias of caller-controlled memref buffer initialized from REE-visible params; shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1083,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "client pointer (from tee_session2client) is forwarded into callee; origin is TA-internal but tainted by caller context.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_client*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1083,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "sess (output pointer) is caller-provided stack pointer &session; callee writes *sess = session which binds TA-private session into caller context.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads a uint32_t session_handle from caller-controlled args via serialargs_get; correctness depends on serialargs_get bounds and content validation.",
      "sink_function": "serialargs_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out (contents)",
        "rhs": "TEE_MemMove(out, src, size) copies from src into out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr returns rc which is checked; TEE_MemMove only executed when rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "args parameter is an alias of caller-controlled serialargs initialized from REE-visible buffer; shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out argument (&session_handle) is caller stack address (TA-private) passed as destination for parsed data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from args/REE buffer) into out without content validation beyond serialargs_get_ptr success.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest (contents)",
        "rhs": "copied from src via TEE_MemMove(dest, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "dest (pointer)",
        "rhs": "call-site argument (out/ptr/ptr+buf0_sz/buf + *blen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "src (pointer)",
        "rhs": "call-site argument (src/buf0/src/data) possibly derived from REE-visible buffers",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34,64-68,186-189"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from caller-controlled serialargs) into out (TA-private) without content validation beyond serialargs_get_ptr success.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src pointer originates from serialargs_get_ptr which reads from caller-controlled buffer (alias of REE-visible memory).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest 'ptr' is a constructed buffer pointer (TA-allocated/unknown) passed as destination for copies.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src 'buf0' may be caller-controlled/shared memory passed into TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest 'ptr + buf0_sz' is pointer arithmetic on buffer; destination aliases constructed buffer and may enable overwrite if sizes miscomputed.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src 'src' at this site may originate from earlier serialargs_get_ptr or caller buffers (shared/REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data (potentially REE-controlled) into buf + *blen without further validation; risk of overflow if blen/len not checked.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination pointer 'buf + *blen' aliases buffer with runtime offset derived from *blen; origin/limits are unclear.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "This TEE_MemMove copies from src (derived from REE-controlled serialargs) into a TA-private out buffer; direction is REE->TA so it is not an unencrypted-output to REE and size is caller-provided but bounded by serialargs_get_ptr checks at call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-visible memref buffer (params->memref.buffer initialized in caller)",
      "propagation_path": [
        "params->memref.buffer -> serialargs_init(&ctrlargs, buffer, size) @ processing.c:1081",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src @ serializer.c:32",
        "TEE_MemMove(out, src, size) copies into TA stack 'out' (session_handle) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) in serialargs_get"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls REE-side memref buffer contents and length passed to TA",
        "serialargs_get_ptr reports success for requested size"
      ],
      "attack_scenario": "Attacker supplies malformed or crafted serial input to influence parsed session_handle or cmd; could attempt to cause incorrect session selection if higher-level checks insufficient.",
      "impact": "Potential logic confusion (invalid session handle) or denial of service via error paths; no direct secret leakage to REE at this line."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get:32-34",
        "recommendation": "Validate content/semantic meaning of parsed integers (e.g., session_handle ranges) beyond raw size checks; ensure serialargs_get_ptr enforces explicit bounds per expected structure."
      },
      {
        "type": "range_check",
        "location": "serialargs_get_session_from_handle:163-169",
        "recommendation": "Ensure session_handle is validated against active session table and consider explicit whitelist checks for values/ranges."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Data source is REE-visible (caller-controlled)",
        "TEE_MemMove performs a direct copy from src into TA memory"
      ],
      "negative_indicators": [
        "serialargs_get_ptr return value is checked before TEE_MemMove",
        "pkcs11_handle2session verifies session existence and returns error if invalid"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The sink at line 34 copies REE-controlled bytes into TA-private memory, but sanitizers (serialargs_get_ptr success check and subsequent pkcs11_handle2session validation) prevent out-of-bounds or unchecked session usage at this program point; the copy direction is into TA, not to REE, so it does not meet unencrypted_output promotion criteria.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The TEE_MemMove at line 34 copies a fixed requested size (sizeof(uint32_t)) from a src validated by serialargs_get_ptr; subsequent validation of the parsed session handle prevents unsafe use, and the copy moves data into TA memory (REE->TA) rather than leaking secrets to REE.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32-34",
      "evidence": "serialargs_get_ptr return code checked before TEE_MemMove"
    },
    {
      "type": "validation",
      "location": "serializer.c:167-169",
      "evidence": "pkcs11_handle2session result checked and returns error if NULL"
    },
    {
      "type": "type_validation",
      "location": "processing.c:1067-1079",
      "evidence": "ptypes compared to expected TEE_PARAM_TYPES and rejected if mismatched"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "serialargs_get_ptr enforces available size before exposing src",
      "evidence": "serializer.c:32-33"
    },
    {
      "arg": "out (destination pointer &session_handle)",
      "why_safe": "destination is TA-private stack location sized for uint32_t",
      "evidence": "serializer.c:160-164"
    }
  ],
  "residual_risks": [
    "Upstream REE-controlled input is parsed into control structures; malformed logical content (e.g., attacker-chosen session_handle pointing to another user's session id) could cause higher-level logic errors even if raw memory safety is preserved."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct data flow from REE buffer into TEE_MemMove at line 34",
      "Call sites show REE-originated buffers"
    ],
    "negative_indicators": [
      "serialargs_get_ptr checked before copy",
      "session handle validated after parse"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No vulnerability at the evaluated sink line because memory bounds are enforced before the copy and the copy direction is REE->TA; the operation does not leak TA secrets to REE nor produce an unchecked buffer overflow at this site.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1081,
      "function": "entry_release_active_processing",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Parses session handle and command from caller-controlled memref buffer with only structural remaining-bytes checks; content semantics rely on later validations.",
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialargs_*",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "TEE_MemMove(buf + *blen, data, len) copies caller-controlled data into buffer at runtime offset derived from *blen; bounds/limit checks are not obvious here.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #111: TA_InvokeCommandEntryPoint -> entry_wrap_key -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 110.85秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The copy is of a fixed 4-byte quantity into a local 4-byte slot with a prior return check, so memory-safety and disclosure concerns at this specific sink line are not supported by available evidence.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1137]:
-- Call #1 at line 1137 --
1135: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1136:
1137: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1138: if (rc)
1139: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "rv = serialargs_get(...) ; if (rv) return rv"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "if (!session) return PKCS11_CKR_SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1137,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases ctrlargs initialized from ctrl->memref (caller-provided REE buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1137,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'client' parameter is alias of caller 'client' (origin derived from tee_session); provenance uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1137,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'sess' parameter receives address of local session (TA-private destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=sizeof(void *)"
        ]
      },
      "code_excerpt": "serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads session_handle from caller-controlled args and uses it to look up a session; relies on pkcs11_handle2session null-check but no additional validation of handle provenance.",
      "sink_function": "serialargs_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->memref.size,dst_sz=4"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) when rc == 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33",
        "evidence": "if (!rc) TEE_MemMove(...); else return rc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1137,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs initialized from ctrl->memref (caller-provided REE buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1137,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter is address of local session_handle (TA-private destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from caller-controlled src (derived from args) into out via TEE_MemMove without visible bounds/sanity checks on args contents.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "callee destination parameter (first arg) at call-sites",
        "site": "serializer.c:34,66,67,188"
      },
      {
        "lhs": "src",
        "rhs": "callee source parameter (second arg) at call-sites",
        "site": "serializer.c:34,66,67,188"
      },
      {
        "lhs": "len",
        "rhs": "callee size parameter (third arg) at call-sites",
        "site": "serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "callsite_return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "serialargs_get_ptr return checked (if !rc) before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' aliases caller-provided out pointer (here &session_handle in caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from caller-controlled src (derived from args) into out via TEE_MemMove; relies on serialargs_get_ptr but lacks local bounds sanity here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TA-allocated pointer, src 'buf0' likely from caller-controlled data; origins differ.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Second copy composes ptr + buf0_sz offset and copies 'size' bytes from src without an explicit bounds check here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'buf + *blen' may be TA buffer and source 'data' originates from caller; offset arithmetic present.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Appends 'len' bytes from caller-controlled data into buf at offset *blen without visible local bounds check here (risk of overflow).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(uint32_t) into a local session_handle; call-site passes size=sizeof(uint32_t) and caller checked serialargs_get_ptr return before the copy, so bounds/size match at this site.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided serial args buffer (REE)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init @ processing.c:1135",
        "serialargs_get_ptr -> serialargs_get @ serializer.c:32-34",
        "TEE_MemMove(out=&session_handle, src, size) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove at serializer.c:34 (copies into TA-local session_handle)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed serialargs buffer provided by REE",
        "serialargs_get_ptr erroneously returns pointer outside intended region"
      ],
      "attack_scenario": "An attacker supplies malformed serialized args causing serialargs_get_ptr to return an unexpected src and size, but the caller requests exactly sizeof(uint32_t) so overflow unlikely at this call-site.",
      "impact": "Potential local corruption if serialargs_get_ptr is faulty; no REE information disclosure from this copy."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr validates remaining buffer length >= requested size and fails otherwise (explicit check shown as return_check but confirm implementation)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size argument is sizeof(uint32_t) at call-site",
        "serialargs_get_ptr return is checked before TEE_MemMove"
      ],
      "negative_indicators": [
        "internal behavior of serialargs_get_ptr not shown here; if it misbehaves, risk remains"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy is of a fixed 4-byte quantity into a local 4-byte slot with a prior return check, so memory-safety and disclosure concerns at this specific sink line are not supported by available evidence.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "At line 34 the copy size equals the caller-intended sizeof(uint32_t) and the helper return is checked, preventing an immediate overflow or disclosure from this site.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serializer.c:32-33",
      "evidence": "serialargs_get_ptr return checked (if !rc) before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "Caller passes sizeof(uint32_t)",
      "evidence": "serializer.c:163 (call from serialargs_get_session_from_handle)"
    },
    {
      "arg": "out",
      "why_safe": "Points to local session_handle sized for uint32_t",
      "evidence": "serializer.c:161-164"
    }
  ],
  "residual_risks": [
    "serializer.c:34 - depends on correctness of serialargs_get_ptr; if that function is flawed, local corruption remains possible",
    "processing.c:1266 - wrap_data_by_symm_enc writes TA-private key material to REE-visible out_buf (structural risk previously reported)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed small copy length (4 bytes)",
      "return/NULL checks present"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the call-site uses a fixed 4-byte size and the helper's return is validated, the TEE_MemMove at line 34 is not a vulnerability by the memory-safety or unencrypted-output rules; remaining concerns are structural and depend on upstream helper correctness.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from caller-controlled src into out via TEE_MemMove without additional local bounds/sanity checks at this function boundary.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into params[2].memref.buffer (REE-visible out_buf) where TA-private secret (key_data) is copied to shared memory; bounds depend on params[2].memref.size.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #112: TA_InvokeCommandEntryPoint -> entry_ck_close_session -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_close_sessionserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 139.03秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks prevent overflow and the copied value is not sensitive; the main risk is weak validation of the parsed handle (addressed separately), so the memmove at line 34 is not a vulnerability.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: entry_ck_close_session
プロンプト 中間 (entry_ck_close_session)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_close_session” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [180]:
-- Call #1 at line 180 --
178: break;
179: case PKCS11_CMD_CLOSE_SESSION:
180: >>> rc = entry_ck_close_session(client, ptypes, params);
181: break;
182: case PKCS11_CMD_CLOSE_ALL_SESSIONS:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

708: enum pkcs11_rc entry_ck_close_session(struct pkcs11_client *client,
709: uint32_t ptypes, TEE_Param *params)
710: { 711: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 712: TEE_PARAM_TYPE_NONE, 713: TEE_PARAM_TYPE_NONE, 714: TEE_PARAM_TYPE_NONE); 715: TEE_Param *ctrl = params; 716: enum pkcs11_rc rc = PKCS11_CKR_OK; 717: struct serialargs ctrlargs = { }; 718: struct pkcs11_session *session = NULL; 719: 720: if (!client || ptypes != exp_pt) 721: return PKCS11_CKR_ARGUMENTS_BAD; 722: 723: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 724: 725: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 726: if (rc) 727: return rc; 728: 729: if (serialargs_remaining_bytes(&ctrlargs)) 730: return PKCS11_CKR_ARGUMENTS_BAD; 731: 732: close_ck_session(session); 733: 734: return PKCS11_CKR_OK; 735: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_close_session", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_close_session", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_close_session)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_close_session",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs",
      "session"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:715"
      },
      {
        "lhs": "ctrl->memref.buffer, ctrl->memref.size",
        "rhs": "caller-provided params memref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:723"
      },
      {
        "lhs": "ctrlargs",
        "rhs": "serialargs_init(ctrl->memref.buffer, ctrl->memref.size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:723"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:725"
      },
      {
        "lhs": "close_ck_session(session) (uses session)",
        "rhs": "session from serialargs_get_session_from_handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:732"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:720-722",
        "evidence": "checks client non-NULL and ptypes == expected TEE_PARAM_TYPES"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:729-730",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) ensures no extra bytes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 180,
      "function": "entry_ck_close_session",
      "rule": "other",
      "why": "Caller-provided params memref (shared/REE-visible) is passed into callee as ctrl; alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_close_session(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 180,
      "function": "entry_ck_close_session",
      "rule": "other",
      "why": "client pointer (from tee_session2client) is forwarded into callee; binding of caller-derived client into helper (origin unclear).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_close_session(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_close_session at lines [725, 798, 1106, 1269, 1416, 1523, 1591, 1635]:
-- Call #1 at line 725 --
723: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
724:
725: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
726: if (rc)
727: return rc;
-- Call #2 at line 798 --
796: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
797:
798: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
799: if (rc)
800: return rc;
-- Call #3 at line 1106 --
1104: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1105:
1106: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1107: if (rc)
1108: return rc;
-- Call #4 at line 1269 --
1267: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1268:
1269: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1270: if (rc)
1271: return rc;
-- Call #5 at line 1416 --
1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1415:
1416: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1417: if (rc)
1418: return rc;
-- Call #6 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #7 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #8 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "rv",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns error (rv) if it cannot read sizeof(uint32_t)"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:168-169",
        "evidence": "pkcs11_handle2session returns NULL if handle invalid -> maps to SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 725,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "args parameter aliases caller-provided serialargs buffer (shared/REE-visible) into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->remaining_bytes,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 725,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "client pointer (from caller) is forwarded into callee; origin unclear (tee_session-derived) so binding recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 725,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "sess output parameter is bound to caller-local session pointer (callee writes caller-owned pointer); record binding.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 167,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Untrusted session_handle parsed from args is used to lookup a session via pkcs11_handle2session without additional validation of handle provenance.",
      "sink_function": "pkcs11_handle2session",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->remaining_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "session = pkcs11_handle2session(session_handle, client);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "rc",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "rc",
        "rhs": "serialargs_get_ptr return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr returns non-zero rc on failure; serialargs_get checks rc before memmove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 725,
      "function": "serialargs_get (call-site binding)",
      "rule": "other",
      "why": "args parameter aliases caller-provided serialargs buffer (shared/REE-visible) into serialargs_get.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=args->remaining_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 725,
      "function": "serialargs_get (call-site binding)",
      "rule": "other",
      "why": "out argument (&session_handle) binds callee output to caller-local TEE-private storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from args/REE) into out without additional provenance checks here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "TEE_MemMove(src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dest",
        "rhs": "TEE_MemMove(src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "dest",
        "rhs": "TEE_MemMove(src, n)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy; caller must ensure bounds/provenance"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(uint32_t) from src derived from serialargs (REE-provided) into caller out (TEE-private) without extra provenance checks here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination ptr may be TA-allocated and src buf0 is likely caller-provided; aliasing/binding of pointers at call-site recorded.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Second copy into ptr+buf0_sz from src (derived from args) binds caller-provided data into assembled buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Appends data (from caller/REE) into buf at offset *blen without visible bounds check here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(uint32_t) (size) from src derived via serialargs_get_ptr (caller-controlled) into TA-private out (&session_handle); serialargs_get_ptr enforces sufficient bytes and serialargs_get checks rc before memmove, and data is non-sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[].memref.buffer (caller/REE) -> serialargs buffer",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init (&ctrlargs) @ pkcs11_token.c:723",
        "serialargs_get_ptr reads src from args -> serialargs_get @ serializer.c:32-34",
        "TEE_MemMove(out, src, size) copies into out (&session_handle) @ serializer.c:34",
        "pkcs11_handle2session(session_handle, client) uses parsed handle @ serializer.c:167"
      ],
      "sink": "TEE_MemMove(out, src, size) at serializer.c:34"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE params provide crafted serialargs buffer",
        "serialargs_get_ptr successfully reads requested size"
      ],
      "attack_scenario": "Attacker supplies a session_handle value in the serialargs buffer to cause pkcs11_handle2session to return an attacker-chosen session or trigger invalid-handle behavior.",
      "impact": "Potential denial of service or session-handle misuse; no direct secret exfiltration from this copy."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serializer.c:167",
        "recommendation": "Validate session_handle provenance/authorization before using it in pkcs11_handle2session (e.g., check client ownership or nonce)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr enforces available bytes and returns error if insufficient",
        "memmove size is fixed and small (sizeof(uint32_t))",
        "destination is TA-private stack/local (&session_handle)"
      ],
      "negative_indicators": [
        "session_handle is attacker-controlled value used in pkcs11_handle2session without extra provenance checks"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks prevent overflow and the copied value is not sensitive; the main risk is weak validation of the parsed handle (addressed separately), so the memmove at line 34 is not a vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "serialargs_get_ptr enforces that size bytes are available and serialargs_get checks rc before copying; the destination is TA-private and data is not classified sensitive here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32-33",
      "evidence": "serialargs_get_ptr returns non-zero rc on failure and serialargs_get checks rc before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "serialargs_get_ptr validates available bytes",
      "evidence": "serializer.c:32-33"
    },
    {
      "arg": "out (&session_handle)",
      "why_safe": "caller allocates local storage for session_handle (TA-private) and copy size is sizeof(uint32_t)",
      "evidence": "pkcs11_token.c:161-164"
    }
  ],
  "residual_risks": [
    "line 34: upstream weak validation of session_handle (used later by pkcs11_handle2session) remains a risk",
    "rc->TEE_MemMove at entry.c:366 copies TA rc into REE-visible buffer (structural, separate)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit bounds check via serialargs_get_ptr",
      "small fixed copy length"
    ],
    "negative_indicators": [
      "session_handle is attacker-controlled and used later without extra checks"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The memmove at line 34 is protected by serialargs_get_ptr bounds validation and copies to TA-private memory; no sensitive data is being written to REE here, so it's not vulnerable though related handle-validation weaknesses exist.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 167,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "pkcs11_handle2session",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Untrusted session_handle parsed from args is used to look up a session without further provenance/authorization checks.",
      "code_excerpt": "session = pkcs11_handle2session(session_handle, client);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #113: TA_InvokeCommandEntryPoint -> entry_ck_session_info -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_session_infoserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 151.05秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: entry_ck_session_info
プロンプト 中間 (entry_ck_session_info)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_session_info” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [186]:
-- Call #1 at line 186 --
184: break;
185: case PKCS11_CMD_SESSION_INFO:
186: >>> rc = entry_ck_session_info(client, ptypes, params);
187: break;
188:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

777: enum pkcs11_rc entry_ck_session_info(struct pkcs11_client *client,
778: uint32_t ptypes, TEE_Param *params)
779: { 780: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 781: TEE_PARAM_TYPE_NONE, 782: TEE_PARAM_TYPE_MEMREF_OUTPUT, 783: TEE_PARAM_TYPE_NONE); 784: TEE_Param *ctrl = params; 785: TEE_Param *out = params + 2; 786: enum pkcs11_rc rc = PKCS11_CKR_OK; 787: struct serialargs ctrlargs = { }; 788: struct pkcs11_session *session = NULL; 789: struct pkcs11_session_info info = { 790: .flags = PKCS11_CKFSS_SERIAL_SESSION, 791: }; 792: 793: if (!client || ptypes != exp_pt || out->memref.size != sizeof(info)) 794: return PKCS11_CKR_ARGUMENTS_BAD; 795: 796: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 797: 798: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 799: if (rc) 800: return rc; 801: 802: if (serialargs_remaining_bytes(&ctrlargs)) 803: return PKCS11_CKR_ARGUMENTS_BAD; 804: 805: info.slot_id = get_token_id(session->token); 806: info.state = session->state; 807: if (pkcs11_session_is_read_write(session)) 808: info.flags |= PKCS11_CKFSS_RW_SESSION; 809: 810: TEE_MemMove(out->memref.buffer, &info, sizeof(info)); 811: 812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle); 813: 814: return PKCS11_CKR_OK; 815: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_session_info", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_session_info", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_session_info)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_session_info",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "out->memref.buffer",
      "session",
      "ctrlargs"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:784-785"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:784-785"
      },
      {
        "lhs": "ctrlargs (buffer/len)",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:796"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:798-800"
      },
      {
        "lhs": "out->memref.buffer (written)",
        "rhs": "&info (local TA-private struct)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation|bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:793-794",
        "evidence": "if (!client || ptypes != exp_pt || out->memref.size != sizeof(info)) return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:802-804",
        "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 186,
      "function": "entry_ck_session_info",
      "rule": "other",
      "why": "callee parameter 'client' is bound from caller-provided tee_session2client result (origin tainted); aliasing of externally-derived client pointer into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = entry_ck_session_info(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 186,
      "function": "entry_ck_session_info",
      "rule": "other",
      "why": "callee parameter 'params' aliases caller-provided TEE_Param array (shared memref buffers), allowing REE-originated memrefs into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr_array,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "rc = entry_ck_session_info(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_session_info at lines [798, 1106, 1269, 1416, 1523, 1591, 1635]:
-- Call #1 at line 798 --
796: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
797:
798: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
799: if (rc)
800: return rc;
-- Call #2 at line 1106 --
1104: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1105:
1106: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1107: if (rc)
1108: return rc;
-- Call #3 at line 1269 --
1267: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1268:
1269: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1270: if (rc)
1271: return rc;
-- Call #4 at line 1416 --
1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1415:
1416: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1417: if (rc)
1418: return rc;
-- Call #5 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #6 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #7 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-171"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns rv checked and function returns rv on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "callee 'args' parameter aliases caller's serialargs pointing into ctrl->memref.buffer (REE-visible), allowing REE-originated bytes to drive session_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "callee 'client' parameter is bound from caller-provided client (origin from tee_session2client); client may be REE-derived/tainted",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "callee 'sess' out-parameter binds to caller's &session (TEE-private), receiving TA-selected session pointer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=ptr,src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out (written)",
        "rhs": "src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr return value assigned to rc but internal checks not visible here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee 'args' aliases caller serialargs pointing into ctrl->memref.buffer (REE-visible); src is derived from REE-origin bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee 'out' parameter binds to caller's &session_handle (TA-private stack) receiving bytes from serialargs_get.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 798,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee 'size' argument is caller-supplied (sizeof(uint32_t)) driving copy length; size originates from call-site constant but relates to REE-provided buffer length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies bytes from src (derived via serialargs_get_ptr from REE-provided buffer) into out without visible content validation; untrusted session_handle can influence control flow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "out (dst)",
        "rhs": "call-site dst argument (e.g., out, ptr, buf + *blen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:<call-site>"
      },
      {
        "lhs": "dst (written)",
        "rhs": "src via TEE_MemMove(dst, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "no additional validation shown around TEE_MemMove call here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst parameter 'out' binds to caller-provided buffer (caller stack variable), receiving bytes from src.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src parameter 'src' originates from serialargs_get_ptr which points into REE-provided serial buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies untrusted bytes from REE-visible src into TA memory without content validation; session_handle can be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst parameter 'ptr' binds to TA-allocated buffer receiving first copy chunk.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "src parameter 'buf0' is TA-local data (previously populated); second copy uses 'src' which may be from serialargs (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst parameter 'ptr + buf0_sz' binds to TA-allocated buffer offset receiving bytes from src (potentially REE-derived).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Second copy moves bytes from src (potentially REE-controlled) into TA buffer without validation of content or bounds beyond size parameter.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dst parameter 'buf + *blen' binds to TA buffer offset; destination derived from TA-managed buffer pointer and length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(buf_size - *blen)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from 'data' (untrusted) into buf without visible range check against actual buffer capacity here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(buf_size - *blen)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "This call copies sizeof(uint32_t) bytes from a src derived via serialargs_get_ptr (REE-origin) into a TA-local out (session_handle) with serialargs_get_ptr return checked; no evidence of dst overflow at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "",
    "taint_flow_summary": {
      "source": "",
      "propagation_path": [],
      "sink": ""
    },
    "exploitation_analysis": {
      "preconditions": [],
      "attack_scenario": "",
      "impact": ""
    },
    "missing_mitigations": [],
    "confidence_factors": {
      "positive_indicators": [],
      "negative_indicators": [],
      "confidence_level": "medium"
    },
    "decision_rationale": "",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The TEE_MemMove at line 34 copies a fixed small size (sizeof(uint32_t)) into a TA-local buffer; serialargs_get_ptr is checked and pkcs11_handle2session validates the handle, so neither memory-safety nor disclosure to REE is apparent.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serializer.c:32-34",
      "evidence": "serialargs_get_ptr return value assigned to rc and checked before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:798-804",
      "evidence": "serialargs_get_session_from_handle returns error on serialargs_get failure and checks remaining bytes"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "access guarded by serialargs_get_ptr which returns error if out-of-range",
      "evidence": "serializer.c:32-33"
    },
    {
      "arg": "out (session_handle)",
      "why_safe": "caller provides TA-local storage of correct size (sizeof(uint32_t))",
      "evidence": "serializer.c:163 and surrounding usage"
    }
  ],
  "residual_risks": [
    "34: untrusted session_handle value (from REE) can influence pkcs11_handle2session behavior; validated only by pkcs11_handle2session which may reject but could allow attacker-controlled handles to affect session selection"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return checked before copy",
      "copy length is fixed sizeof(uint32_t)"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here (assumed correct)",
      "upstream buffer sizes (ctrl->memref.size) rely on caller-provided values"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety precedence: no evidence copy_len exceeds dst capacity and serialargs_get_ptr is checked; information-disclosure promotion not applicable (copy is REE->TA). Therefore not marked vulnerable, but untrusted handle use is a residual risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies untrusted bytes from src (derived via serialargs_get_ptr into REE buffer) into TA memory without content validation; may allow attacker-controlled session_handle.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies bytes from src into TA buffer without visible validation of content or ensuring combined buffer capacity.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(buf_size - *blen)"
        ]
      },
      "why": "Copies len bytes from data (untrusted) into buf at offset *blen without visible bounds check here.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #114: TA_InvokeCommandEntryPoint -> entry_ck_init_pin -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_init_pinserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 157.31秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 34 transfers data from REE-visible src into a TA-private destination (&session_handle) with size fixed (sizeof uint32_t at caller) and serialargs_get_ptr is checked before TEE_MemMove, so neither information disclosure to REE nor an immediate bounds overflow is evident.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_ck_init_pin
プロンプト 中間 (entry_ck_init_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_init_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [193]:
-- Call #1 at line 193 --
191: break;
192: case PKCS11_CMD_INIT_PIN:
193: >>> rc = entry_ck_init_pin(client, ptypes, params);
194: break;
195: case PKCS11_CMD_SET_PIN:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1087: enum pkcs11_rc entry_ck_init_pin(struct pkcs11_client *client,
1088: uint32_t ptypes, TEE_Param *params)
1089: { 1090: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1091: TEE_PARAM_TYPE_NONE, 1092: TEE_PARAM_TYPE_NONE, 1093: TEE_PARAM_TYPE_NONE); 1094: struct pkcs11_session *session = NULL; 1095: enum pkcs11_rc rc = PKCS11_CKR_OK; 1096: struct serialargs ctrlargs = { }; 1097: TEE_Param *ctrl = params; 1098: uint32_t pin_size = 0; 1099: void *pin = NULL; 1100: 1101: if (!client || ptypes != exp_pt) 1102: return PKCS11_CKR_ARGUMENTS_BAD; 1103: 1104: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1105: 1106: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1107: if (rc) 1108: return rc; 1109: 1110: rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t)); 1111: if (rc) 1112: return rc; 1113: 1114: rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size); 1115: if (rc) 1116: return rc; 1117: 1118: if (serialargs_remaining_bytes(&ctrlargs)) 1119: return PKCS11_CKR_ARGUMENTS_BAD; 1120: 1121: if (!pkcs11_session_is_so(session)) 1122: return PKCS11_CKR_USER_NOT_LOGGED_IN; 1123: 1124: assert(session->token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED); 1125: 1126: IMSG("PKCS11 session %"PRIu32": init PIN", session->handle); 1127: 1128: return set_pin(session, pin, pin_size, PKCS11_CKU_USER); 1129: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_init_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_init_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_init_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_init_pin",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrlargs",
      "pin_size",
      "pin",
      "session"
    ],
    "propagation": [
      {
        "lhs": "ctrlargs",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1104"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1106-1108"
      },
      {
        "lhs": "pin_size",
        "rhs": "serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1110-1112"
      },
      {
        "lhs": "pin",
        "rhs": "serialargs_get_ptr(&ctrlargs, &pin, pin_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1114-1116"
      },
      {
        "lhs": "return value of set_pin",
        "rhs": "pin (from REE memref buffer) passed to set_pin(session, pin, pin_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1128"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1090-1102",
        "evidence": "ptypes must equal expected exp_pt else return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1110-1116",
        "evidence": "serialargs_get/serialargs_get_ptr return rc on failure"
      },
      {
        "kind": "consistency_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1118-1119",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked to ensure no extra trailing data"
      },
      {
        "kind": "auth_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1121-1122",
        "evidence": "pkcs11_session_is_so(session) verified (user must be logged in)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 193,
      "function": "entry_ck_init_pin",
      "rule": "other",
      "why": "caller-provided client pointer is forwarded into callee parameter; origin region uncertain (session handle from caller), so alias binding recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = entry_ck_init_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 193,
      "function": "entry_ck_init_pin",
      "rule": "other",
      "why": "caller-provided params (memref.buffer) is passed into callee; buffer is REE-shared and may contain PIN data, so binding recorded and sensitivity elevated.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_init_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "rule": "other",
      "why": "pin pointer obtained from serialargs (originating from caller memref buffer) is passed to set_pin; alias of shared buffer into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_init_pin at lines [1106, 1269, 1416, 1523, 1591, 1635]:
-- Call #1 at line 1106 --
1104: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1105:
1106: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1107: if (rc)
1108: return rc;
-- Call #2 at line 1269 --
1267: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1268:
1269: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1270: if (rc)
1271: return rc;
-- Call #3 at line 1416 --
1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1415:
1416: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1417: if (rc)
1418: return rc;
-- Call #4 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #5 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #6 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session (assigned to caller-provided pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get return value checked and early return on error"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result checked and error returned if null"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1106,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "serialargs struct (args) originates from caller memref buffer (REE-shared) and is forwarded into this helper; record alias binding.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1106,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "client pointer provided by caller is forwarded into helper; origin uncertain (derived from TA entry), record binding.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1106,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "address of caller-local session variable (&session) is passed for output; callee writes TEE-private session pointer back to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(void*),src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) destination",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "rc",
        "rhs": "return value of serialargs_get_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-36"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "serialargs_get_ptr return value checked (rc) before performing TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "args (struct serialargs*) originates from caller-initialized buffer (ctrl->memref.buffer) and is an alias of REE-shared data; record binding.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out pointer passed by caller (e.g. &session_handle) is a TA-private destination; binding recorded for alias.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from src (from args, originated from REE-visible buffer) into out (caller-provided TA buffer), creating REE->TA flow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "src (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (originating from serialargs, which is backed by caller memref buffer) into out; creates REE->TA flow from shared buffer into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "First TEE_MemMove copies buf0 (likely from REE or intermediate) into ptr, possibly building a concatenated buffer; records REE->TA aliasing risk.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Second TEE_MemMove appends src into ptr+buf0_sz; src may be REE-derived and size-driven, so concatenation bounds should be tracked.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'len' bytes from data into buf + *blen; destination is buffer growth in TA but source may be REE-visible—possible bounds/overflow risk if not checked by caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=buf_size-*blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from caller memref buffer) into out which, at the call site, is a TA-private local (&session_handle); serialargs_get_ptr return is checked before the copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 34 transfers data from REE-visible src into a TA-private destination (&session_handle) with size fixed (sizeof uint32_t at caller) and serialargs_get_ptr is checked before TEE_MemMove, so neither information disclosure to REE nor an immediate bounds overflow is evident.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get:32-35",
      "evidence": "serialargs_get_ptr return value (rc) is checked and TEE_MemMove is only executed when rc == 0"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:163-165",
      "evidence": "caller requests exactly sizeof(uint32_t) into session_handle"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (from args)",
      "why_safe": "validated by serialargs_get_ptr before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
    },
    {
      "arg": "out (&session_handle)",
      "why_safe": "destination is a fixed-size TA-local uint32_t and caller invoked with matching size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163 and caller usage"
    }
  ],
  "residual_risks": [
    "None suppressed by memory-safety precedence for this line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return checked before copy",
      "call-site uses size sizeof(uint32_t) for session_handle"
    ],
    "negative_indicators": [
      "origin of args is REE-visible memref buffer (untrusted input)",
      "serialargs_get_ptr implementation not shown here (assumed correct)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The sink at line 34 performs a bounded copy into a TA-local uint32_t with pre-checks; no evidence of overflow or REE-side leakage from this line, so not classified as vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); structural REE-facing write recorded though rc appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "PIN bytes are sourced from caller memref and passed to set_pin; credential sensitivity inferred from usage/name.",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from args-derived src into out; overall REE->TA flow recorded though caller used this to read a session handle.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #115: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_set_pinserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 145.93秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: No memory-safety violation or REE-directed plaintext leak at this TEE_MemMove: fixed small copy into TA-local storage with surrounding checks; thus not classified as vulnerability under memory-safety or unencrypted_output rules.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: entry_ck_set_pin
プロンプト 中間 (entry_ck_set_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_set_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [196]:
-- Call #1 at line 196 --
194: break;
195: case PKCS11_CMD_SET_PIN:
196: >>> rc = entry_ck_set_pin(client, ptypes, params);
197: break;
198: case PKCS11_CMD_LOGIN:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1248: enum pkcs11_rc entry_ck_set_pin(struct pkcs11_client *client,
1249: uint32_t ptypes, TEE_Param *params)
1250: { 1251: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1252: TEE_PARAM_TYPE_NONE, 1253: TEE_PARAM_TYPE_NONE, 1254: TEE_PARAM_TYPE_NONE); 1255: struct pkcs11_session *session = NULL; 1256: enum pkcs11_rc rc = PKCS11_CKR_OK; 1257: struct serialargs ctrlargs = { }; 1258: uint32_t old_pin_size = 0; 1259: TEE_Param *ctrl = params; 1260: uint32_t pin_size = 0; 1261: void *old_pin = NULL; 1262: void *pin = NULL; 1263: 1264: if (!client || ptypes != exp_pt) 1265: return PKCS11_CKR_ARGUMENTS_BAD; 1266: 1267: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1268: 1269: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1270: if (rc) 1271: return rc; 1272: 1273: rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t)); 1274: if (rc) 1275: return rc; 1276: 1277: rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t)); 1278: if (rc) 1279: return rc; 1280: 1281: rc = serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size); 1282: if (rc) 1283: return rc; 1284: 1285: rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size); 1286: if (rc) 1287: return rc; 1288: 1289: if (serialargs_remaining_bytes(&ctrlargs)) 1290: return PKCS11_CKR_ARGUMENTS_BAD; 1291: 1292: if (!pkcs11_session_is_read_write(session)) 1293: return PKCS11_CKR_SESSION_READ_ONLY; 1294: 1295: if (pkcs11_session_is_so(session)) { 1296: if (!(session->token->db_main->flags & 1297: PKCS11_CKFT_TOKEN_INITIALIZED)) 1298: return PKCS11_CKR_GENERAL_ERROR; 1299: 1300: rc = check_so_pin(session, old_pin, old_pin_size); 1301: if (rc) 1302: return rc; 1303: 1304: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle); 1305: 1306: return set_pin(session, pin, pin_size, PKCS11_CKU_SO); 1307: } 1308: 1309: if (!(session->token->db_main->flags & 1310: PKCS11_CKFT_USER_PIN_INITIALIZED)) 1311: return PKCS11_CKR_GENERAL_ERROR; 1312: 1313: rc = check_user_pin(session, old_pin, old_pin_size); 1314: if (rc) 1315: return rc; 1316: 1317: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle); 1318: 1319: return set_pin(session, pin, pin_size, PKCS11_CKU_USER); 1320: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_set_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_set_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_set_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_set_pin",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs (serialargs state)",
      "old_pin_size",
      "pin_size",
      "old_pin",
      "pin",
      "session"
    ],
    "propagation": [
      {
        "lhs": "ctrlargs",
        "rhs": "ctrl->memref.buffer (params)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1267"
      },
      {
        "lhs": "old_pin_size",
        "rhs": "serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1273"
      },
      {
        "lhs": "pin_size",
        "rhs": "serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1277"
      },
      {
        "lhs": "old_pin",
        "rhs": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1281"
      },
      {
        "lhs": "pin",
        "rhs": "serialargs_get_ptr(&ctrlargs, &pin, pin_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1285"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1248-1255",
        "evidence": "exp_pt requires MEMREF_INOUT in ptypes; checked at function start"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1289-1290",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked to be zero"
      },
      {
        "kind": "auth_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1292-1296",
        "evidence": "session read-write and SO/token initialization checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 196,
      "function": "entry_ck_set_pin",
      "rule": "other",
      "why": "Call-site binding: callee param 'client' is an alias of caller-provided tee_session-derived pointer; origin is unclear but comes from TA entry.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_set_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 196,
      "function": "entry_ck_set_pin",
      "rule": "other",
      "why": "Call-site binding: callee param 'params' aliases caller memref (shared/REE-visible buffer) passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_set_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "rule": "weak_input_validation",
      "why": "Uses sizes read from REE-provided buffer (old_pin_size/pin_size) to obtain pointers into that buffer via serialargs_get_ptr without stronger semantic validation.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_set_pin at lines [1269, 1416, 1523, 1591, 1635]:
-- Call #1 at line 1269 --
1267: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1268:
1269: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1270: if (rc)
1271: return rc;
-- Call #2 at line 1416 --
1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1415:
1416: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1417: if (rc)
1418: return rc;
-- Call #3 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #4 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #5 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "session_handle",
      "session",
      "sess"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session (assigned)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns error (rv) which is checked and propagated"
      },
      {
        "kind": "validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result is NULL-checked and mapped to SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1269,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases caller memref buffer (shared/REE-visible serialargs state).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1269,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'client' parameter originates from caller (tee_session-derived); provenance is from entry and thus unclear.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1269,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'sess' out-parameter is caller stack pointer receiving session alias; origin inside TA (callee writes *sess).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(struct pkcs11_session*),dst_sz=sizeof(struct pkcs11_session*)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads session_handle (uint32) from REE-provided serialargs and uses it to look up a session; invalid handles are checked but use of attacker-controlled handle influences control flow.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->remaining_bytes,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) source",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34-34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr returns rc which is checked; TEE_MemMove executed only if !rc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases caller serialargs state built from REE-provided memref buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter at caller is &session_handle (caller stack), written by callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'size' argument is caller-provided literal sizeof(uint32_t); influences copy length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from REE-controlled serialargs) into out via TEE_MemMove; src is attacker-influenced even though rc is checked.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->remaining_bytes,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from REE-controlled serialargs_get_ptr) into caller out; src is attacker-influenced though call-site checks rc.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->remaining_bytes,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter aliases caller stack variable (e.g., &session_handle) written by TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'size' argument controls copy length (influences amount of REE-origin data moved).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies buf0 (origin uncertain) into ptr; origins of ptr and buf0 are local/alloc and/or caller-dependent.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies src (origin unclear) into ptr+buf0_sz; pointer arithmetic on dst uses prior size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: copies data (origin unclear) into buf + *blen; dst arithmetic uses *blen which may be attacker-influenced if not validated here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Generic risk: TEE_MemMove moves attacker-influenced bytes from a shared-source into local memory; correctness depends on prior validation of size and src pointer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(dst, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(uint32_t) from REE-origin serialargs into a TA-local out (&session_handle); prior checks (serialargs_get_ptr return and fixed size argument sizeof(uint32_t)) bound the copy and destination is TA-private, so no unencrypted REE output or obvious overflow here.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided memref buffer (serialargs state)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init @ pkcs11_token.c:1267",
        "serialargs_get_ptr -> src @ serializer.c:32",
        "TEE_MemMove(out, src, size) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) (copies into TA-local out)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malicious REE client provides crafted serialargs buffer"
      ],
      "attack_scenario": "Attacker controls the 4-byte session_handle value read into TA; invalid handle causes control-flow to return an error but does not leak TA secrets or overflow local buffers.",
      "impact": "Limited: attacker can influence session_handle value used in subsequent lookup, possibly causing session lookup failure or selection of unintended session handle if server-side checks are insufficient."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get_session_from_handle:163",
        "recommendation": "Validate session_handle value semantics/range after read and before using it in pkcs11_handle2session lookup"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "copy_len is sizeof(uint32_t) (fixed)",
        "serialargs_get_ptr return value is checked before TEE_MemMove"
      ],
      "negative_indicators": [
        "src originates from REE-visible buffer (attacker-controlled)",
        "semantic validation of session_handle beyond NULL-check may be limited"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "No memory-safety violation or REE-directed plaintext leak at this TEE_MemMove: fixed small copy into TA-local storage with surrounding checks; thus not classified as vulnerability under memory-safety or unencrypted_output rules.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The call copies a fixed sizeof(uint32_t) from a REE buffer into a TA-local variable with a prior rc check; destination is not REE-visible and bounds are enforced by the fixed size argument.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32-34",
      "evidence": "serialargs_get_ptr returns rc and TEE_MemMove is executed only if !rc"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:167-169",
      "evidence": "pkcs11_handle2session NULL-checked and mapped to SESSION_HANDLE_INVALID"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "serialargs_get_ptr validates and returns error if insufficient",
      "evidence": "serializer.c:32-33"
    },
    {
      "arg": "out",
      "why_safe": "caller provides address of stack variable sized for uint32_t",
      "evidence": "serialargs_get called with sizeof(uint32_t) at serializer.c:163"
    },
    {
      "arg": "size",
      "why_safe": "fixed to sizeof(uint32_t) at call-site limiting copy length",
      "evidence": "serialargs_get invoked with sizeof(uint32_t) at serializer.c:163"
    }
  ],
  "residual_risks": [
    "line 34: REE-controlled session_handle value influences session lookup; validate semantics/range to avoid logic issues"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed small copy length",
      "rc checked before copy",
      "NULL-check after handle->session lookup"
    ],
    "negative_indicators": [
      "source is REE-controlled",
      "semantic validation of session_handle is limited to existence"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The TEE_MemMove at line 34 performs a bounded copy of a 4-byte value from REE-controlled serialargs into TA-local storage after a pointer/length check; it does not write into REE-visible memory nor present an unchecked large copy, so it is not classified as vulnerable under the prioritized rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE buffer (old_pin_size/pin_size) to obtain pointers into that buffer without stronger semantic validation.",
      "code_excerpt": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args->remaining_bytes,dst_sz=size"
        ]
      },
      "why": "Copies attacker-influenced bytes from serialargs into TA memory; correctness depends on upstream validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared but data is non-sensitive status code.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #116: TA_InvokeCommandEntryPoint -> entry_ck_login -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_ck_loginserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 130.13秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: caller-provided TEE_Param.memref.buffer (REE-visible serialized args)

シンク: TEE_MemMove at serializer.c:34 (copy into local session_handle)

判定理由: The line performs a direct copy of attacker-controlled bytes into a TA-internal integer used for session lookup; size/bounds are checked but semantic validation is missing, enabling weak-input-validation attack paths.

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: entry_ck_login
プロンプト 中間 (entry_ck_login)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_login” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [199]:
-- Call #1 at line 199 --
197: break;
198: case PKCS11_CMD_LOGIN:
199: >>> rc = entry_ck_login(client, ptypes, params);
200: break;
201: case PKCS11_CMD_LOGOUT:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1395: enum pkcs11_rc entry_ck_login(struct pkcs11_client *client,
1396: uint32_t ptypes, TEE_Param *params)
1397: { 1398: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1399: TEE_PARAM_TYPE_NONE, 1400: TEE_PARAM_TYPE_NONE, 1401: TEE_PARAM_TYPE_NONE); 1402: struct pkcs11_session *session = NULL; 1403: struct pkcs11_session *sess = NULL; 1404: enum pkcs11_rc rc = PKCS11_CKR_OK; 1405: struct serialargs ctrlargs = { }; 1406: TEE_Param *ctrl = params; 1407: uint32_t user_type = 0; 1408: uint32_t pin_size = 0; 1409: void *pin = NULL; 1410: 1411: if (!client || ptypes != exp_pt) 1412: return PKCS11_CKR_ARGUMENTS_BAD; 1413: 1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1415: 1416: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1417: if (rc) 1418: return rc; 1419: 1420: rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t)); 1421: if (rc) 1422: return rc; 1423: 1424: rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t)); 1425: if (rc) 1426: return rc; 1427: 1428: rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size); 1429: if (rc) 1430: return rc; 1431: 1432: if (serialargs_remaining_bytes(&ctrlargs)) 1433: return PKCS11_CKR_ARGUMENTS_BAD; 1434: 1435: switch (user_type) { 1436: case PKCS11_CKU_SO: 1437: if (pkcs11_session_is_so(session)) 1438: return PKCS11_CKR_USER_ALREADY_LOGGED_IN; 1439: 1440: if (pkcs11_session_is_user(session)) 1441: return PKCS11_CKR_USER_ANOTHER_ALREADY_LOGGED_IN; 1442: 1443: TAILQ_FOREACH(sess, &client->session_list, link) 1444: if (sess->token == session->token && 1445: !pkcs11_session_is_read_write(sess)) 1446: return PKCS11_CKR_SESSION_READ_ONLY_EXISTS; 1447: 1448: 1467: 1468: rc = check_so_pin(session, pin, pin_size); 1469: if (!rc) 1470: session_login_so(session); 1471: 1472: break; 1473: 1474: case PKCS11_CKU_USER: 1475: if (pkcs11_session_is_so(session)) 1476: return PKCS11_CKR_USER_ANOTHER_ALREADY_LOGGED_IN; 1477: 1478: if (pkcs11_session_is_user(session)) 1479: return PKCS11_CKR_USER_ALREADY_LOGGED_IN; 1480: 1481: 1486: 1487: rc = check_user_pin(session, pin, pin_size); 1488: if (!rc) 1489: session_login_user(session); 1490: 1491: break; 1492: 1493: case PKCS11_CKU_CONTEXT_SPECIFIC: 1494: return PKCS11_CKR_OPERATION_NOT_INITIALIZED; 1495: 1496: default: 1497: return PKCS11_CKR_USER_TYPE_INVALID; 1498: } 1499: 1500: if (!rc) 1501: IMSG("PKCS11 session %"PRIu32": login", session->handle); 1502: 1503: return rc; 1504: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_login", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_login", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_login)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_login",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs (serialargs)",
      "user_type",
      "pin_size",
      "pin",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1416-1418"
      },
      {
        "lhs": "user_type",
        "rhs": "serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1420-1422"
      },
      {
        "lhs": "pin_size",
        "rhs": "serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1424-1426"
      },
      {
        "lhs": "pin",
        "rhs": "serialargs_get_ptr(&ctrlargs, &pin, pin_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1428-1430"
      },
      {
        "lhs": "ctrlargs",
        "rhs": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1414"
      },
      {
        "lhs": "ctrl",
        "rhs": "params (caller-provided memref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1406-1414"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1411-1412",
        "evidence": "if (!client || ptypes != exp_pt) return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "consumption_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1432-1433",
        "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 199,
      "function": "entry_ck_login",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'client' is alias of value derived from tee_session (caller) — origin is REE-derived but concrete region is unclear.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_login(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 199,
      "function": "entry_ck_login",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'params' is alias of caller-provided TEE_Param array (shared/REE-visible memrefs).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = entry_ck_login(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1428,
      "function": "entry_ck_login",
      "rule": "weak_input_validation",
      "why": "Alias of pin pointer obtained from serialargs_get_ptr using REE-controlled pin_size; tainted length controls pointer extraction without additional validation of pin content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_login at lines [1416, 1523, 1591, 1635]:
-- Call #1 at line 1416 --
1414: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1415:
1416: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1417: if (rc)
1418: return rc;
-- Call #2 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #3 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #4 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "if (rv) return rv after serialargs_get"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "if (!session) return PKCS11_CKR_SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1416,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'args' is alias of &ctrlargs initialized from ctrl->memref.buffer (caller-provided shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1416,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'client' is alias of caller-provided client (originates from tee_session); provenance unclear.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1416,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'sess' is pointer to local session variable (TEE-private) passed for output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads session_handle from serialized (REE-controlled) args and uses it to look up a session via pkcs11_handle2session without further validation of handle provenance.",
      "sink_function": "pkcs11_handle2session",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "session = pkcs11_handle2session(session_handle, client);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35",
        "evidence": "if (!rc) TEE_MemMove(out, src, size) – proceeds only when serialargs_get_ptr returned success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' is passed &ctrlargs (local), which encapsulates pointers into REE-visible memref buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=?"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' is &session_handle (caller-local TEE-private) receiving data read from serialized args.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from REE-controlled args) into out without validating that src content is a well-formed integer/session handle.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out/dest",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr / ptr + buf0_sz",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size) copy buffers into allocated ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "TEE_MemMove(buf + *blen, data, len) appends data into buf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35",
        "evidence": "serialargs_get_ptr must return success (rc == 0) before TEE_MemMove is invoked"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from REE-controlled serialized args) into out without validating src content semantics.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 into allocated ptr; buf0 origin unclear (could be REE-controlled), potential aliasing of shared buffers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies src into ptr+offset; src provenance ambiguous (could be REE) and write uses computed offset into allocated buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "shared_memory_overwrite",
      "why": "Appends 'len' bytes from data (likely REE-controlled) into buf at *blen without clear bounds check on buf; write target may alias shared/REE-visible memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'size' bytes from src derived from REE-controlled serialized args into a TEE-private out without semantic validation of the value (session handle), allowing attacker-controlled handle material to propagate into TA state.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-provided TEE_Param.memref.buffer (REE-visible serialized args)",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs (serialargs_init) @ ta/pkcs11_token.c:1414",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src points into REE buffer @ ta/serializer.c:32-33",
        "TEE_MemMove(out, src, size) copies into out (&session_handle) @ ta/serializer.c:34",
        "session_handle used in pkcs11_handle2session(session_handle, client) @ ta/serializer.c:167 (caller)"
      ],
      "sink": "TEE_MemMove at serializer.c:34 (copy into local session_handle)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls serialized args sent in params[0] memref buffer",
        "serialargs_get_ptr succeeds for requested size"
      ],
      "attack_scenario": "Attacker supplies a crafted session_handle value via serialized args; TA copies it into session_handle without validating its provenance, causing pkcs11_handle2session to be called with attacker-controlled handle, potentially mapping to unintended session or causing logic confusion.",
      "impact": "Incorrect session lookup or unauthorized session influence (logic/authorization bypass), depending on pkcs11_handle2session behavior."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get:34",
        "recommendation": "Validate that the decoded session_handle is within expected range and bound to the client (e.g., check ownership/validity) before using it."
      },
      {
        "type": "range_check",
        "location": "serialargs_get_session_from_handle:163-169",
        "recommendation": "Ensure session_handle semantics/authority are verified and not accepted blindly from serialized input."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy from REE-controlled buffer into local session_handle at the sink",
        "No semantic validation of session_handle before use"
      ],
      "negative_indicators": [
        "serialargs_get_ptr returns an rc checked before copy (prevents out-of-bounds copy for size)",
        "pkcs11_handle2session may itself perform validation (unknown here)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The line performs a direct copy of attacker-controlled bytes into a TA-internal integer used for session lookup; size/bounds are checked but semantic validation is missing, enabling weak-input-validation attack paths.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 34,
        "function": "serialargs_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies 'size' bytes from src (REE-controlled serialized args) into out (&session_handle) without validating the decoded handle's provenance or bounds."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serialargs_get:33-35",
      "evidence": "serialargs_get_ptr must succeed (rc == 0) before TEE_MemMove is invoked"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (from serialargs_get_ptr)",
      "why_safe": "Bounds for the copy are ensured by serialargs_get_ptr returning success",
      "evidence": "ta/serializer.c:32-34"
    },
    {
      "arg": "out (&session_handle)",
      "why_safe": "Destination size equals requested size (caller passes sizeof(uint32_t))",
      "evidence": "ta/serializer.c:29-36 and ta/serializer.c:163 usage"
    }
  ],
  "residual_risks": [
    "34: semantic lack of validation allows attacker-controlled session_handle to reach pkcs11_handle2session; pkcs11_handle2session behavior could further exacerbate impact"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct tainted flow from REE buffer to TEE_MemMove sink",
      "Subsequent use of copied value in session lookup"
    ],
    "negative_indicators": [
      "serialargs_get_ptr enforces size bounds before copy",
      "Unclear whether pkcs11_handle2session includes additional validation"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory bounds for the copy are enforced, so no overflow, but semantic validation is missing: attacker-controlled integer is copied into TA state and used for session resolution, which constitutes a weak input validation vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies attacker-controlled serialized bytes into TA-local session_handle without semantic validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #117: TA_InvokeCommandEntryPoint -> entry_ck_logout -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_logoutserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 119.23秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: Bounds/consumption checks (serialargs_get_ptr return code and caller checks) prevent unchecked copy of the requested size; destination is TA-private therefore not an REE exfiltration sink.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_ck_logout
プロンプト 中間 (entry_ck_logout)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_logout” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [202]:
-- Call #1 at line 202 --
200: break;
201: case PKCS11_CMD_LOGOUT:
202: >>> rc = entry_ck_logout(client, ptypes, params);
203: break;
204:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1506: enum pkcs11_rc entry_ck_logout(struct pkcs11_client *client,
1507: uint32_t ptypes, TEE_Param *params)
1508: { 1509: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1510: TEE_PARAM_TYPE_NONE, 1511: TEE_PARAM_TYPE_NONE, 1512: TEE_PARAM_TYPE_NONE); 1513: struct pkcs11_session *session = NULL; 1514: enum pkcs11_rc rc = PKCS11_CKR_OK; 1515: struct serialargs ctrlargs = { }; 1516: TEE_Param *ctrl = params; 1517: 1518: if (!client || ptypes != exp_pt) 1519: return PKCS11_CKR_ARGUMENTS_BAD; 1520: 1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1522: 1523: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1524: if (rc) 1525: return rc; 1526: 1527: if (serialargs_remaining_bytes(&ctrlargs)) 1528: return PKCS11_CKR_ARGUMENTS_BAD; 1529: 1530: if (pkcs11_session_is_public(session)) 1531: return PKCS11_CKR_USER_NOT_LOGGED_IN; 1532: 1533: session_logout(session); 1534: 1535: IMSG("PKCS11 session %"PRIu32": logout", session->handle); 1536: 1537: return PKCS11_CKR_OK; 1538: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_logout", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_logout", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_logout)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_logout",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs",
      "session",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1516"
      },
      {
        "lhs": "ctrlargs (initialized)",
        "rhs": "serialargs_init(ctrl->memref.buffer, ctrl->memref.size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1521"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1523-1525"
      },
      {
        "lhs": "rc",
        "rhs": "return codes from checks (ptypes/serialargs_get_session_from_handle/serialargs_remaining_bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1518-1528"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1509-1512",
        "evidence": "ptypes must equal exp_pt else return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1518",
        "evidence": "if (!client || ptypes != exp_pt) return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "consumption_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1527-1528",
        "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 202,
      "function": "entry_ck_logout",
      "rule": "other",
      "why": "Binding callee parameter 'client' to caller-provided tee_session-derived pointer; origin region unclear (could be TA-private or kernel-provided), so aliasing risk recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = entry_ck_logout(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 202,
      "function": "entry_ck_logout",
      "rule": "weak_input_validation",
      "why": "Binding callee parameter 'params' to caller-provided memref (REE-visible); shared buffer flows into serial parsing routines and must be validated.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:session",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=ctrl->memref.size"
        ]
      },
      "code_excerpt": "rc = entry_ck_logout(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_logout at lines [1523, 1591, 1635]:
-- Call #1 at line 1523 --
1521: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1522:
1523: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1524: if (rc)
1525: return rc;
-- Call #2 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #3 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "rv",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns rv and caller checks rv; failure causes early return"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:168-169",
        "evidence": "if (!session) return PKCS11_CKR_SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads session_handle from args which originates from caller-provided ctrl->memref.buffer (REE-visible); parsing relies on serialargs_get to validate bounds.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->buf_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 167,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Calls pkcs11_handle2session(session_handle, client); client origin is caller-provided and its region is unclear, so binding recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "session = pkcs11_handle2session(session_handle, client);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 171,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Writes resolved session pointer back into caller-provided sess (alias of caller stack); records binding of callee output to caller region.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(void*),dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "*sess = session;"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "rc",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) when rc == 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-36"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "serialargs_get_ptr returns rc; only when rc==0 is TEE_MemMove performed"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args which originates from caller-controlled buffer) into out without additional type validation beyond serialargs_get_ptr.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee parameter 'args' to caller-provided serialargs structure (originates from ctrl->memref.buffer); record alias of shared buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee parameter 'out' to caller-provided pointer (e.g., &session_handle); out is TA-private stack in callers like serialargs_get_session_from_handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=unknown"
        ]
      },
      "code_excerpt": "enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "args->buf (caller origin)"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "src copied into out via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Performs direct copy of 'size' bytes from src (derived from caller-provided buffer via serialargs_get_ptr) into out without additional validation beyond serialargs_get_ptr.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst 'out' to caller-provided pointer (TA-private) and src to args-derived pointer (shared/REE-visible); record aliasing of parameters.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies sizeof(uint32_t) bytes from src (derived from caller memref) into TA-local out only after serialargs_get_ptr returned success; caller checks rc and serialargs functions perform bounds checks.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Bounds/consumption checks (serialargs_get_ptr return code and caller checks) prevent unchecked copy of the requested size; destination is TA-private therefore not an REE exfiltration sink.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:163-165",
      "evidence": "serialargs_get_ptr returns rc; caller checks rv and returns on error"
    },
    {
      "type": "consumption_check",
      "location": "pkcs11_token.c:1527-1528",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked in caller"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1509-1512",
      "evidence": "ptypes must equal expected types else return"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "validated by serialargs_get_ptr and serialargs_remaining_bytes at callers",
      "evidence": "serializer.c:32; pkcs11_token.c:1521,1527-1528"
    },
    {
      "arg": "out",
      "why_safe": "out is caller-local TA stack variable (&session_handle) not REE-visible",
      "evidence": "serializer.c:31; serializer.c:171"
    }
  ],
  "residual_risks": [
    "structural parsing of caller-controlled memref remains a weak_input_validation surface if serialargs_get_ptr is flawed"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return code is checked before the TEE_MemMove",
      "caller checks serialargs_remaining_bytes to ensure exact consumption"
    ],
    "negative_indicators": [
      "src region labeled REE-visible (caller provided), so correctness depends on serialargs_get_ptr implementation which is assumed but not fully verified here"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The copy at line 34 is guarded by serialargs_get_ptr's return code and caller-side consumption checks; the destination is TA-local, and no evidence shows an oversize copy, thus not classified as a vulnerable sink under memory-safety or information-disclosure rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from args-derived src into out; relies on serialargs_get_ptr for bounds validation.",
      "code_excerpt": "if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args->buf_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Parses session_handle from caller buffer; relies on serialargs_get to supply valid data.",
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 171,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(void*),dst_sz=sizeof(void*)"
        ]
      },
      "why": "Assigns resolved session pointer back to caller-provided sess pointer; records binding.",
      "code_excerpt": "*sess = session;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 202,
      "function": "entry_ck_logout",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:session",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=ctrl->memref.size"
        ]
      },
      "why": "Passes caller-provided params memref into entry_ck_logout; shared buffer parsed for session handle.",
      "code_excerpt": "rc = entry_ck_logout(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller memref output buffer; destination is REE-visible but data is non-sensitive status code.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #118: TA_InvokeCommandEntryPoint -> entry_ck_seed_random -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_seed_randomserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 125.24秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: Bounds check via serialargs_get_ptr/rc prevents unsafe copy and the destination is TA-private; data is public/random-like and not promoted to sensitive, so no unencrypted_output applies.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_ck_seed_random
プロンプト 中間 (entry_ck_seed_random)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_seed_random” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [313]:
-- Call #1 at line 313 --
311: break;
312: case PKCS11_CMD_SEED_RANDOM:
313: >>> rc = entry_ck_seed_random(client, ptypes, params);
314: break;
315: case PKCS11_CMD_GENERATE_RANDOM:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1572: enum pkcs11_rc entry_ck_seed_random(struct pkcs11_client *client,
1573: uint32_t ptypes, TEE_Param *params)
1574: { 1575: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1576: TEE_PARAM_TYPE_MEMREF_INPUT, 1577: TEE_PARAM_TYPE_NONE, 1578: TEE_PARAM_TYPE_NONE); 1579: TEE_Param *ctrl = params; 1580: TEE_Param *in = params + 1; 1581: enum pkcs11_rc rc = PKCS11_CKR_OK; 1582: struct serialargs ctrlargs = { }; 1583: struct pkcs11_session *session = NULL; 1584: TEE_Result res = TEE_SUCCESS; 1585: 1586: if (!client || ptypes != exp_pt) 1587: return PKCS11_CKR_ARGUMENTS_BAD; 1588: 1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1590: 1591: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1592: if (rc) 1593: return rc; 1594: 1595: if (serialargs_remaining_bytes(&ctrlargs)) 1596: return PKCS11_CKR_ARGUMENTS_BAD; 1597: 1598: if (in->memref.size && !in->memref.buffer) 1599: return PKCS11_CKR_ARGUMENTS_BAD; 1600: 1601: if (!in->memref.size) 1602: return PKCS11_CKR_OK; 1603: 1604: res = seed_rng_pool(in->memref.buffer, in->memref.size); 1605: if (res != TEE_SUCCESS) 1606: return PKCS11_CKR_FUNCTION_FAILED; 1607: 1608: DMSG("PKCS11 session %"PRIu32": seed random", session->handle); 1609: 1610: return PKCS11_CKR_OK; 1611: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_seed_random", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_seed_random", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_seed_random)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_seed_random",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl (params[0])",
      "in (params[1])",
      "in->memref.buffer",
      "in->memref.size",
      "session"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1579-1580"
      },
      {
        "lhs": "in",
        "rhs": "params + 1",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1580"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1591-1593"
      },
      {
        "lhs": "in->memref.buffer",
        "rhs": "caller-provided params[1].memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1589,1598-1604"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1575-1578",
        "evidence": "exp_pt checked against ptypes"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1595-1603",
        "evidence": "serialargs_remaining_bytes/NULL-buffer and zero-size checks before use"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 313,
      "function": "entry_ck_seed_random",
      "rule": "other",
      "why": "Binding callee 'params' parameter to caller-provided memref array (shared/REE-visible); alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:random",
          "size_triplet:copy_len=in->memref.size,src_sz=in->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_seed_random(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 313,
      "function": "entry_ck_seed_random",
      "rule": "other",
      "why": "Binding callee 'client' parameter to caller-supplied client handle (origin via tee_session); origin region unclear so marked unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = entry_ck_seed_random(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_seed_random at lines [1591, 1635]:
-- Call #1 at line 1591 --
1589: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1590:
1591: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1592: if (rc)
1593: return rc;
-- Call #2 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "rv",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns error (rv) if insufficient bytes for sizeof(uint32_t)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1591,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Alias of caller's serialargs structure whose buffer points to REE-provided memref; callee will read session_handle from that REE-visible buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1591,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee 'client' parameter to caller-supplied client handle (origin from tee_session2client); origin region uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1591,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee 'sess' parameter to address of caller-local 'session' pointer so callee writes TA-private session pointer back to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(void *),src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "caller-provided pointer passed into serialargs_get",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27-36"
      },
      {
        "lhs": "out (written)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr returns non-zero rc if insufficient bytes; serialargs_get checks rc before MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from args buffer, likely REE-provided) into caller-supplied out buffer via TEE_MemMove; source is REE-tainted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee 'args' parameter to caller's ctrlargs whose buffer references REE-provided memref; alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee 'out' parameter to address of caller-local session_handle (TEE-private); callee will write into caller stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied n bytes)",
        "site": "invocation sites vary (see structural_risks)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from serialargs, likely REE-provided) into caller out buffer; source is REE-tainted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst argument to caller-provided 'out' (caller stack/local) so callee writes into caller memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0_sz bytes from buf0 (origin unclear) into ptr; src may be REE-visible or TA-private depending on caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src into ptr+buf0_sz; pointer arithmetic on dst may alias shared or local memory depending on ptr origin.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies len bytes from data (caller-provided) into buf + *blen; destination arithmetic uses *blen which is influenced by TA state and may cause overflow if unchecked.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src argument to caller 'data' which originates from REE-provided memref (shared).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Source 'src' is derived from serialargs (REE-provided) but serialargs_get_ptr enforces length and serialargs_get checks rc before MemMove, preventing out-of-bounds/read; destination 'out' is TA-private (caller stack). No evidence of sensitive TA-private secret being written to REE here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Bounds check via serialargs_get_ptr/rc prevents unsafe copy and the destination is TA-private; data is public/random-like and not promoted to sensitive, so no unencrypted_output applies.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get:32-33",
      "evidence": "serialargs_get_ptr returns error if insufficient bytes and serialargs_get checks rc before calling TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_seed_random:1575-1578",
      "evidence": "ptypes compared against expected exp_pt"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "Validated by serialargs_get_ptr which ensures sufficient bytes",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out",
      "why_safe": "Caller provides a pointer to local session_handle (TA-private) and size matches sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27,163"
    }
  ],
  "residual_risks": [
    "Upstream copy at entry.c:366 writes TA rc into REE-visible memref (TEE_MemMove) — not part of this sink line analysis but a structural info-flow to REE."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr guards insufficient bytes (rv) before copy",
      "serialargs_get checks rc and avoids MemMove when rc != 0"
    ],
    "negative_indicators": [
      "src originates from REE-provided buffer (tainted)",
      "some caller contexts use pointer arithmetic (other TEE_MemMove sites) which may be risky"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety sanitizer prevents unsafe copy at line 34 and destination is TA-private; no sensitive data is promoted to REE here, so the call is not a vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from args-derived src (REE-visible) into caller-provided out buffer; guarded by serialargs_get_ptr but source is REE-tainted.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1591,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "why": "Alias of ctrlargs whose buffer references REE-provided memref; callee reads session_handle from shared buffer.",
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #119: TA_InvokeCommandEntryPoint -> entry_ck_generate_random -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_generate_randomserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 152.08秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 34 moves REE-originated data into TA-private storage; serialargs_get_ptr return is checked before copying, and there is no evidence of a size/overflow or sensitive secret being written to REE at this call site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_ck_generate_random
プロンプト 中間 (entry_ck_generate_random)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_generate_random” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [316]:
-- Call #1 at line 316 --
314: break;
315: case PKCS11_CMD_GENERATE_RANDOM:
316: >>> rc = entry_ck_generate_random(client, ptypes, params);
317: break;
318: case PKCS11_CMD_DERIVE_KEY:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1613: enum pkcs11_rc entry_ck_generate_random(struct pkcs11_client *client,
1614: uint32_t ptypes, TEE_Param *params)
1615: { 1616: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 1617: TEE_PARAM_TYPE_NONE, 1618: TEE_PARAM_TYPE_MEMREF_OUTPUT, 1619: TEE_PARAM_TYPE_NONE); 1620: TEE_Param *ctrl = params; 1621: TEE_Param *out = params + 2; 1622: enum pkcs11_rc rc = PKCS11_CKR_OK; 1623: struct serialargs ctrlargs = { }; 1624: struct pkcs11_session *session = NULL; 1625: void *buffer = NULL; 1626: size_t buffer_size = 0; 1627: uint8_t *data = NULL; 1628: size_t left = 0; 1629: 1630: if (!client || ptypes != exp_pt) 1631: return PKCS11_CKR_ARGUMENTS_BAD; 1632: 1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 1634: 1635: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 1636: if (rc) 1637: return rc; 1638: 1639: if (serialargs_remaining_bytes(&ctrlargs)) 1640: return PKCS11_CKR_ARGUMENTS_BAD; 1641: 1642: if (out->memref.size && !out->memref.buffer) 1643: return PKCS11_CKR_ARGUMENTS_BAD; 1644: 1645: if (!out->memref.size) 1646: return PKCS11_CKR_OK; 1647: 1648: buffer_size = MIN(out->memref.size, RNG_CHUNK_SIZE); 1649: buffer = TEE_Malloc(buffer_size, TEE_MALLOC_FILL_ZERO); 1650: if (!buffer) 1651: return PKCS11_CKR_DEVICE_MEMORY; 1652: 1653: data = out->memref.buffer; 1654: left = out->memref.size; 1655: 1656: while (left) { 1657: size_t count = MIN(left, buffer_size); 1658: 1659: TEE_GenerateRandom(buffer, count); 1660: TEE_MemMove(data, buffer, count); 1661: 1662: data += count; 1663: left -= count; 1664: } 1665: 1666: DMSG("PKCS11 session %"PRIu32": generate random", session->handle); 1667: 1668: TEE_Free(buffer); 1669: 1670: return PKCS11_CKR_OK; 1671: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_generate_random", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_generate_random", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_generate_random)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_generate_random",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "buffer",
      "data",
      "left",
      "count"
    ],
    "propagation": [
      {
        "lhs": "ctrlargs <- ctrl->memref.buffer, ctrl->memref.size",
        "rhs": "serialargs_init(ctrlargs, ctrl->memref.buffer, ctrl->memref.size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1633"
      },
      {
        "lhs": "session <- ctrlargs (via handle)",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1635-1637"
      },
      {
        "lhs": "buffer_size",
        "rhs": "MIN(out->memref.size, RNG_CHUNK_SIZE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1648"
      },
      {
        "lhs": "buffer <- TEE_Malloc(...)",
        "rhs": "TEE_Malloc(buffer_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1649-1651"
      },
      {
        "lhs": "data",
        "rhs": "out->memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1653"
      },
      {
        "lhs": "left",
        "rhs": "out->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1654"
      },
      {
        "lhs": "count",
        "rhs": "MIN(left, buffer_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1657"
      },
      {
        "lhs": "data[0..count-1] (REE-visible)",
        "rhs": "TEE_GenerateRandom(buffer,count) -> TEE_MemMove(data, buffer, count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659-1660"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1630-1631",
        "evidence": "checks ptypes == expected TEE_PARAM_TYPES"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1642-1646",
        "evidence": "rejects non-null size with null buffer and returns OK for zero size"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1649-1651",
        "evidence": "checks TEE_Malloc result and returns on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 316,
      "function": "entry_ck_generate_random",
      "rule": "other",
      "why": "Binding of callee parameter 'client' at call-site to caller-local client whose provenance is tainted/uncertain; records aliasing origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_generate_random(client, ptypes, params); // client binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 316,
      "function": "entry_ck_generate_random",
      "rule": "other",
      "why": "Binding of callee parameter 'params' to caller-provided TEE_Param array (shared/REE-visible origin); alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_generate_random(client, ptypes, params); // params binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1659,
      "function": "entry_ck_generate_random",
      "rule": "other",
      "why": "Generates random into TA-private buffer then copies into caller-provided out->memref.buffer (REE-visible); random is public by default.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(buffer, count); TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_generate_random at lines [1635]:
-- Call #1 at line 1635 --
1633: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1634:
1635: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1636: if (rc)
1637: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get return value (rv) checked and returned on error"
      },
      {
        "kind": "sanity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-170",
        "evidence": "pkcs11_handle2session result checked and returns SESSION_HANDLE_INVALID if null"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1635,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding of callee 'args' to ctrlargs which was initialized from caller-provided ctrl->memref.buffer (shared/REE-visible); alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // args binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1635,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding of callee 'client' to caller 'client' whose provenance is from tee_session2client (tainted/uncertain); records aliasing origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // client binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1635,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding of callee 'sess' to address of caller-local session variable (TA-private); callee will write session pointer back into caller storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); // sess binding"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "rc",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out[0..size-1]",
        "rhs": "TEE_MemMove(out, src, size) when rc == 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-34"
      },
      {
        "lhs": "rc",
        "rhs": "return value of serialargs_get_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35",
        "evidence": "only performs TEE_MemMove when serialargs_get_ptr returned success (rc == 0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding of callee 'args' to caller-provided ctrlargs which itself was initialized from REE-supplied memref; records aliasing origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); // args binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding of callee 'out' to caller stack address (&session_handle) which is TA-private; callee writes into caller-provided storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); // out binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (obtained via serialargs_get_ptr from args) into out; src may originate from REE-visible buffer via args.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest[0..n-1]",
        "rhs": "copy from src[0..n-1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66-67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of dest parameter to caller 'out' which is TA-private stack storage (&session_handle) at call-site; records aliasing origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of src parameter to pointer obtained from serialargs_get_ptr which may reference REE-originated buffer via args; records possible REE->TA origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of dest parameter to allocated ptr which will become returned to caller (*out); alias of TA-allocated buffer passed back to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=ptr_region_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of dest parameter to ptr+buf0_sz (TA-allocated region) and src parameter to 'src' (origin uncertain); records potential mixing of regions.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=ptr_region_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of dest parameter to buf + *blen (buffer concat) and src to data; caller origins uncertain—possible REE-derived data copied into TA buffer or vice versa.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen)+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'size' bytes from src (obtained via serialargs_get_ptr from args) into TA-private out (&session_handle); serialargs_get_ptr failure is checked and prevents the copy, and no evidence of bounds overflow at this site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 34 moves REE-originated data into TA-private storage; serialargs_get_ptr return is checked before copying, and there is no evidence of a size/overflow or sensitive secret being written to REE at this call site.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serializer.c:32-34",
      "evidence": "only performs TEE_MemMove when serialargs_get_ptr returned success (rc == 0)"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1630-1631",
      "evidence": "checks ptypes == expected TEE_PARAM_TYPES in caller before parsing args"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "validated by serialargs_get_ptr and upstream ptypes check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32; pkcs11_token.c:1630-1633"
    },
    {
      "arg": "out",
      "why_safe": "caller provided TA-private address (&session_handle) sized for uint32_t",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:161-164"
    }
  ],
  "residual_risks": [
    "line 366: copies rc into caller-provided memref.buffer (REE-visible) — potential REE observation of TA state",
    "pkcs11_token.c:1659-1660: copies generated random into out->memref.buffer (REE-visible) — random is non-sensitive by default but is exported to REE"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr return is checked before copying",
      "upstream param type validation (ptypes) performed in caller"
    ],
    "negative_indicators": [
      "origin of src depends on serialargs_get_ptr which reads from args initialized from REE memref (tainted source)",
      "size provenance is based on caller-provided sizes (out->memref.size) though checked earlier in caller in some paths"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory‑safety takes precedence: there is a checked getter (serialargs_get_ptr) preventing the copy on failure, and the copy writes into TA-private storage rather than exposing secrets to REE, so the sink at line 34 is not vulnerable under given rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 316,
      "function": "entry_ck_generate_random",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Binding of 'params' (caller-provided TEE_Param array) passed into entry_ck_generate_random; alias of shared buffer passed into helper.",
      "code_excerpt": "rc = entry_ck_generate_random(client, ptypes, params); // params binding"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1659,
      "function": "entry_ck_generate_random",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=out->memref.size"
        ]
      },
      "why": "Generates random into TA-private buffer then copies into caller-provided out->memref.buffer (REE-visible); random is public by default.",
      "code_excerpt": "TEE_GenerateRandom(buffer, count); TEE_MemMove(data, buffer, count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #120: TA_InvokeCommandEntryPoint -> entry_create_object -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 105.03秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Memory-safety conditions at this copy are satisfied (fixed small length, return value checked) and destination is TA-private, so the copy does not produce an unencrypted REE output or overflow here.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_create_object at lines [327, 422, 513, 679, 727, 769, 942, 994, 1110]:
-- Call #1 at line 327 --
325: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
326:
327: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
328: if (rc)
329: return rc;
-- Call #2 at line 422 --
420: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
421:
422: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
423: if (rc)
424: return rc;
-- Call #3 at line 513 --
511: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
512:
513: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
514: if (rc)
515: return rc;
-- Call #4 at line 679 --
677: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
678:
679: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
680: if (rc)
681: return rc;
-- Call #5 at line 727 --
725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
726:
727: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
728: if (rc)
729: return rc;
-- Call #6 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #7 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #8 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #9 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns error code (rv) checked and propagated"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result checked and converted to SESSION_HANDLE_INVALID on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 327,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases a serialargs built over ctrl->memref.buffer which is REE-provided/shared buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 327,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'client' parameter is alias of caller 'client' (origin unclear from call-site).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 327,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: callee 'sess' parameter aliases caller's local &session (TA-private output pointer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads a uint32_t session_handle from args (REE-originated buffer) and uses it to resolve a session; malformed handle could be attacker-controlled.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(session_handle)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr return checked via rc before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 327,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases a serialargs built over ctrl->memref.buffer (REE-provided/shared).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 327,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter aliases caller local (&session_handle), a TA-private destination.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from args which is REE-originated) into out via TEE_MemMove; src may be attacker-controlled if serialargs_get_ptr insufficiently validated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "call-site out argument (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) -> src (derived from REE buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
      },
      {
        "lhs": "memory at out",
        "rhs": "memory at src copied for length size via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr return value rc checked before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter aliases caller-provided destination (e.g., &session_handle) which is TA-private at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'src' parameter aliases a pointer obtained from serialargs_get_ptr over args (which is built from REE memref), so src is REE-originated/shared.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from REE buffer) into out without additional size/overlap checks here; src may be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'size' bytes (here sizeof(uint32_t) at the caller) from src (derived from REE buffer) into a TA-private destination (&session_handle); caller provided fixed size and serialargs_get_ptr return is checked before the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs (&ctrlargs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:325",
        "serialargs_get_ptr(args, &src, size) -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove copying into TA-private out (&session_handle)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker-controlled REE buffer passed as ctrl->memref.buffer",
        "no prior validation of the contents beyond serialargs_get_ptr"
      ],
      "attack_scenario": "Malformed session_handle value could be supplied, but it is bounded to sizeof(uint32_t) and later validated via pkcs11_handle2session; direct memory-safety abuse at this copy is unlikely.",
      "impact": "Potentially incorrect session selection (logical), not memory disclosure or overflow at this site."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get:32-34",
        "recommendation": "Ensure serialargs_get_ptr enforces bounds and format checks for the extracted integer and fail early if value is out of expected range."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "copy length is fixed sizeof(uint32_t) at call site",
        "serialargs_get_ptr return value is checked before TEE_MemMove",
        "pkcs11_handle2session validates session existence after extraction"
      ],
      "negative_indicators": [
        "src originates from REE-visible buffer (attacker-controlled)",
        "internal validation of the parsed integer's semantic correctness depends on downstream pkcs11_handle2session"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety conditions at this copy are satisfied (fixed small length, return value checked) and destination is TA-private, so the copy does not produce an unencrypted REE output or overflow here.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 34 writes a fixed-size uint32_t into a TA-private destination with return checks in place; no evidence of overflow or secret disclosure at this line.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get_ptr return value rc is checked before calling TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:163-169",
      "evidence": "pkcs11_handle2session(NULL) check maps to SESSION_HANDLE_INVALID"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "fixed to sizeof(uint32_t) at caller",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
    },
    {
      "arg": "out",
      "why_safe": "caller passes address of TA-local session_handle (sized appropriately)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
    }
  ],
  "residual_risks": [
    "serialargs_get_ptr must robustly validate that 'src' points inside declared bounds of the REE-provided buffer; weakness there could enable unexpected data to be injected into parsed fields"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed small copy length",
      "pre-copy return check",
      "downstream validation of session handle"
    ],
    "negative_indicators": [
      "source buffer is REE-originated and attacker-controlled"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given fixed copy size, explicit return checks, and TA-private destination, the sink at line 34 is not vulnerable to overflow or secret leakage; remaining concerns are structural and lie in earlier parsing/validation functions.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies bytes from REE-derived src into TA memory; if serialargs_get_ptr lacks adequate bounds/format validation, attacker-controlled input may influence parsed values.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies a TA-private obj_handle into caller-provided REE-visible memref (MEMREF_OUTPUT); structural risk but not part of evaluated sink line.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #121: TA_InvokeCommandEntryPoint -> entry_destroy_object -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_destroy_objectserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 118.00秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: No memory-safety issue at this call: copy length equals destination size and return-code check prevents blind copies; destination is TA-private so no unencrypted REE output. Therefore not classified as a vulnerability under current rules.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_destroy_object at lines [422, 513, 679, 727, 769, 942, 994, 1110]:
-- Call #1 at line 422 --
420: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
421:
422: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
423: if (rc)
424: return rc;
-- Call #2 at line 513 --
511: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
512:
513: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
514: if (rc)
515: return rc;
-- Call #3 at line 679 --
677: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
678:
679: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
680: if (rc)
681: return rc;
-- Call #4 at line 727 --
725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
726:
727: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
728: if (rc)
729: return rc;
-- Call #5 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #6 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #7 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #8 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns rv and function returns on non-zero rv"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result is null-checked and mapped to SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 422,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee parameter 'args' to caller-controlled serialargs backed by ctrl->memref.buffer (shared/REE-visible); origin is shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 422,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee parameter 'client' to caller-provided client (originated from tee_session2client); provenance not proven TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 422,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee parameter 'sess' to caller's &session (callee writes back a pointer to TA-private session), origin is TEE-private local in caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "parameter 'out' (caller-provided buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27-28"
      },
      {
        "lhs": "out (after)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr may perform pointer/size validation and rc is checked before MemMove (rc==0 required)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee parameter 'args' to caller-controlled serialargs (ctrl->memref.buffer): shared/REE-visible buffer passed in.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee parameter 'out' to caller's &session_handle (TA-local); callee will write parsed data into this TA-private location.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from 'src' (derived from args/serial buffer, potentially REE-controlled) into caller-supplied out buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "dst (call-site specific)",
        "rhs": "out (serialargs_get) / ptr / ptr+buf0_sz / buf + *blen",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66-67,188"
      },
      {
        "lhs": "src",
        "rhs": "serialargs-derived buffers or local 'data' (caller-provided in some sites)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34,60-67,184-189"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'out' is a TA-private buffer in serialargs_get but receives data from 'src' derived from args (potentially REE-controlled).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'src' originates from serialargs_get_ptr reading from a serial buffer (caller-controlled), so memmove copies REE-controlled bytes into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call is dependent on 'size' provided by caller path; if serialargs_get_ptr did insufficient validation, this copy could be out-of-bounds.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove at line 34 copies sizeof(uint32_t) bytes from a serial-derived src into a TA-local out (session_handle); serialargs_get_ptr return value is checked before copy, and destination size equals copy_len.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "ctrl->memref.buffer (caller/REE-provided serial buffer)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init/ctrlargs @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:420",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) -> out (TA-private session_handle) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove copying into TA-local out"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls ctrl->memref.buffer contents",
        "serialargs_get_ptr returns success for requested size"
      ],
      "attack_scenario": "A malicious REE client supplies a crafted serial buffer; serialargs_get_ptr provides a pointer to attacker-controlled bytes which are copied into a TA-local uint32_t variable (session_handle).",
      "impact": "Possible manipulation of session_handle value leading to logic errors; not direct disclosure or overflow given fixed size copy."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr validates remaining buffer length and content/layout before returning success."
      },
      {
        "type": "access_control",
        "location": "entry_destroy_object:420-426",
        "recommendation": "Verify client/session authorization before accepting and using session_handle values from caller."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "rc from serialargs_get_ptr is checked before MemMove (serialargs_get returns rc and only copies when rc==0)",
        "copy length is sizeof(uint32_t), matching destination size"
      ],
      "negative_indicators": [
        "implementation of serialargs_get_ptr not shown; its validation strength is unknown",
        "src is derived from REE-visible buffer"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "No memory-safety issue at this call: copy length equals destination size and return-code check prevents blind copies; destination is TA-private so no unencrypted REE output. Therefore not classified as a vulnerability under current rules.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The call copies a fixed sizeof(uint32_t) into a TA-local variable and only occurs when serialargs_get_ptr succeeded; no overflow or REE-facing leak is evident.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get/serialargs_get_ptr:32-33",
      "evidence": "serialargs_get checks rc from serialargs_get_ptr and only proceeds to TEE_MemMove when rc == 0"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "Caller used sizeof(uint32_t) for requested size, matching destination",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
    },
    {
      "arg": "out",
      "why_safe": "Out is a TA-local uint32_t (session_handle) with size equal to copy length",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:160-163"
    }
  ],
  "residual_risks": [],
  "confidence_factors": {
    "positive_indicators": [
      "rc checked before copy",
      "fixed small copy size"
    ],
    "negative_indicators": [
      "serialargs_get_ptr internals unknown",
      "src originates from REE-visible buffer"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given checked return code and matching sizes, the copy is not a memory-safety or unencrypted-output vulnerability; remaining risk depends on upstream validation of the serial buffer which is unknown but non-evidently insufficient.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copying local rc into caller-provided memref.buffer (REE-visible) — destination is shared though data appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 209,
      "function": "entry_destroy_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Binding caller-provided 'client' into callee; provenance not proven TEE-private.",
      "code_excerpt": "rc = entry_destroy_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 209,
      "function": "entry_destroy_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Binding caller memref params into callee; params->memref.buffer is REE-visible and passed into helper.",
      "code_excerpt": "rc = entry_destroy_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Binding args (serialargs backed by ctrl->memref.buffer) into helper; buffer is shared/REE-visible.",
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from src (derived from serialargs buffer) into out; depends on serialargs_get_ptr validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #122: TA_InvokeCommandEntryPoint -> entry_find_objects_init -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objects_initserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 119.10秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The memmove at line 34 is guarded by serialargs_get returning success (serialargs_get_ptr likely enforces available bytes) and the requested size is a small fixed sizeof(uint32_t).

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_find_objects_init at lines [513, 679, 727, 769, 942, 994, 1110]:
-- Call #1 at line 513 --
511: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
512:
513: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
514: if (rc)
515: return rc;
-- Call #2 at line 679 --
677: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
678:
679: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
680: if (rc)
681: return rc;
-- Call #3 at line 727 --
725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
726:
727: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
728: if (rc)
729: return rc;
-- Call #4 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #5 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #6 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #7 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns non-zero on failure and caller returns rv"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result is checked and PKCS11_CKR_SESSION_HANDLE_INVALID returned if NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 513,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases serialargs initialized from caller memref.buffer (caller REE-visible shared memory).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 513,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'client' parameter aliases caller 'client' derived from tee_session (origin unclear).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(struct pkcs11_client),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 513,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'sess' is an out-parameter passed as &session (caller stack/TEE-private), callee writes pointer to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(struct pkcs11_session*),dst_sz=sizeof(struct pkcs11_session*)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "session_handle is parsed from args (shared/REE buffer) and then used to index into session DB via pkcs11_handle2session; malformed handle from REE may cause incorrect mapping.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34-35"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases serialargs initialized from caller memref buffer (shared REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter is &session_handle (caller TEE-private stack) passed to callee as destination for extracted bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args -> shared REE buffer) into out without visible bounds check here; if serialargs_get_ptr insufficiently validated, untrusted data is copied into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz",
        "rhs": "TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src derived from serialargs (REE-visible) into out without local bounds here; untrusted src can influence TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 (origin unclear) into ptr; origin of buf0 may be REE or TA and is not shown here, so binding is uncertain.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src into ptr+buf0_sz; if src is from REE-visible input, this writes untrusted bytes into TA buffer without local bounds here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "shared_memory_overwrite",
      "why": "Copies 'len' bytes into buf + *blen where *blen is attacker-influenced/tainted; possible out-of-bounds/overwrite of destination without evident bounds check here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=buf_capacity - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "The call copies sizeof(uint32_t) from src into out after serialargs_get_ptr succeeded; caller invoked with size=sizeof(uint32_t) and serialargs_get checks rc before copying, indicating a bounds-aware fetch of a fixed-size integer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The memmove at line 34 is guarded by serialargs_get returning success (serialargs_get_ptr likely enforces available bytes) and the requested size is a small fixed sizeof(uint32_t).",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get only calls TEE_MemMove when serialargs_get_ptr returned rc==0"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:163-169",
      "evidence": "pkcs11_handle2session(NULL) is checked and error returned if invalid"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "serialargs_get_ptr validates/advances internal pointer and returns error if insufficient",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out",
      "why_safe": "caller provides &session_handle (TA-private stack) and copy size is fixed sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163"
    }
  ],
  "residual_risks": [
    "Other TEE_MemMove calls in serializer.c use variable sizes and destinations with weaker local checks (e.g., line 188), and some call-sites operate on buffers originating from REE-visible memory.",
    "Higher-level callers may pass malformed ptypes/params in other code paths; type mismatch checks exist in some entry functions but not uniformly."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get checks return code before memmove",
      "this call uses a fixed small size (sizeof(uint32_t)) from caller context"
    ],
    "negative_indicators": [
      "implementation of serialargs_get_ptr not shown here; if it is flawed, bounds may be insufficient",
      "other memmove usages in the codebase show weaker validation patterns"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 34 performs a bounded copy of a fixed-size (uint32_t) value after a helper returned success; available evidence indicates adequate size validation at the helper level, so it's not classified as vulnerable. However, similar patterns elsewhere suggest structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from src derived from serialargs into TA memory; correctness depends on serialargs_get_ptr validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Copies 'size' bytes from src into allocated buffer without local visible bounds here; relies on upstream checks.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "some_helper",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=buf_capacity - *blen"
        ]
      },
      "why": "Copies 'len' bytes into buf + *blen where *blen is tainted/variable; potential overwrite if bounds not enforced.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); structural output to REE though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #123: TA_InvokeCommandEntryPoint -> entry_find_objects -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objectsserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 125.41秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 34 writes a fixed small size (sizeof(uint32_t)) into a TA-local destination; callers pass that exact size and serialargs_get only performs the copy when serialargs_get_ptr succeeded, preventing an immediate size/overflow issue.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (10 メッセージ)

関数: entry_find_objects
プロンプト 中間 (entry_find_objects)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_find_objects” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [295]:
-- Call #1 at line 295 --
293: break;
294: case PKCS11_CMD_FIND_OBJECTS:
295: >>> rc = entry_find_objects(client, ptypes, params);
296: break;
297: case PKCS11_CMD_FIND_OBJECTS_FINAL:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

654: enum pkcs11_rc entry_find_objects(struct pkcs11_client *client,
655: uint32_t ptypes, TEE_Param *params)
656: { 657: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 658: TEE_PARAM_TYPE_NONE, 659: TEE_PARAM_TYPE_MEMREF_OUTPUT, 660: TEE_PARAM_TYPE_NONE); 661: TEE_Param *ctrl = params; 662: TEE_Param *out = params + 2; 663: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 664: struct serialargs ctrlargs = { }; 665: struct pkcs11_session *session = NULL; 666: struct pkcs11_find_objects *ctx = NULL; 667: uint8_t *out_handles = NULL; 668: size_t out_count = 0; 669: size_t count = 0; 670: 671: if (!client || ptypes != exp_pt) 672: return PKCS11_CKR_ARGUMENTS_BAD; 673: 674: out_count = out->memref.size / sizeof(uint32_t); 675: out_handles = out->memref.buffer; 676: 677: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 678: 679: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 680: if (rc) 681: return rc; 682: 683: if (serialargs_remaining_bytes(&ctrlargs)) 684: return PKCS11_CKR_ARGUMENTS_BAD; 685: 686: ctx = session->find_ctx; 687: 688: if (!ctx) 689: return PKCS11_CKR_OPERATION_NOT_INITIALIZED; 690: 691: for (count = 0; ctx->next < ctx->count && count < out_count; 692: ctx->next++, count++) 693: TEE_MemMove(out_handles + count * sizeof(uint32_t), 694: ctx->handles + ctx->next, sizeof(uint32_t)); 695: 696: 697: out->memref.size = count * sizeof(uint32_t); 698: 699: DMSG("PKCS11 session %"PRIu32": finding objects", session->handle); 700: 701: return PKCS11_CKR_OK; 702: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_find_objects", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_find_objects", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_find_objects)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_find_objects",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "out_count",
      "out_handles"
    ],
    "propagation": [
      {
        "lhs": "out_count",
        "rhs": "out->memref.size / sizeof(uint32_t)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:674"
      },
      {
        "lhs": "out_handles",
        "rhs": "out->memref.buffer (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:675"
      },
      {
        "lhs": "ctrlargs",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:677"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:679-681"
      },
      {
        "lhs": "ctx",
        "rhs": "session->find_ctx",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:686-689"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:671-672",
        "evidence": "ptypes compared against expected exp_pt; returns ARGUMENTS_BAD if mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:691-694",
        "evidence": "loop condition uses count < out_count limiting writes to out_handles"
      },
      {
        "kind": "consistency_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:683-685",
        "evidence": "checks serialargs_remaining_bytes(&ctrlargs) -> ARGUMENTS_BAD if leftover"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 295,
      "function": "entry_find_objects",
      "rule": "other",
      "why": "Binding: callee parameter 'client' receives caller-provided client pointer whose provenance is not clearly TEE-private (derived from tee_session); record aliasing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_find_objects(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 295,
      "function": "entry_find_objects",
      "rule": "other",
      "why": "Binding: callee parameter 'params' aliases caller-provided TEE_Param array (shared/REE-visible memrefs); record aliasing of shared buffers.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_find_objects(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "entry_find_objects",
      "rule": "other",
      "why": "Copies TA-side object handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; writes are bounded by out_count computed from REE size.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctx->count*sizeof(uint32_t),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_find_objects at lines [679, 727, 769, 942, 994, 1110]:
-- Call #1 at line 679 --
677: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
678:
679: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
680: if (rc)
681: return rc;
-- Call #2 at line 727 --
725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
726:
727: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
728: if (rc)
729: return rc;
-- Call #3 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #4 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #5 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #6 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns non-zero (rv) on failure and function returns rv"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 679,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'args' aliases caller-initialized serialargs backed by ctrl->memref.buffer (shared REE-visible); record aliasing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 679,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'client' receives caller-provided client pointer whose provenance (tee_session-derived) is not clearly TEE-private; record aliasing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 679,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'sess' is an out-parameter pointing at caller local 'session' (TA-private); record aliasing of output pointer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Reads a uint32 session_handle from caller-controlled args and uses it to look up a session; relies on pkcs11_handle2session for validation.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=args_remaining,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "caller-provided pointer passed into serialargs_get",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:27-36"
      },
      {
        "lhs": "out (contents)",
        "rhs": "TEE_MemMove(out, src, size) when rc == 0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "function checks rc from serialargs_get_ptr and only calls TEE_MemMove when rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: callee 'args' aliases caller-initialized serialargs (backed by ctrl->memref.buffer) which is REE-visible; record aliasing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: callee 'out' parameter aliases caller stack '&session_handle' (TA-private); record aliasing of output pointer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from args, potentially REE-controlled) into out via TEE_MemMove; src provenance is shared/REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args_remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "call-sites: serializer.c:34,66,67,188"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "call-sites: serializer.c:34,66,67,188"
      },
      {
        "lhs": "len",
        "rhs": "caller-controlled size argument",
        "site": "call-sites: serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "none_detected",
        "site": "unknown",
        "evidence": "TEE_MemMove calls shown have no internal bounds checks here; relies on callers to ensure sizes/regions"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from src derived via serialargs_get_ptr (likely REE-controlled) into out (&session_handle) which is TA-private; records binding of src/dest provenance.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args_remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "First TEE_MemMove binds dest ptr and buf0 (src) origins; buf0 provenance unclear (could be REE or TA) so record aliasing.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Second TEE_MemMove binds dest (ptr+buf0_sz) and src; src provenance (serialargs-derived) may be REE-visible—record aliasing and taint of size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args_remaining,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'len' bytes from data (likely caller-provided) into buf + *blen (TA buffer) without local bounds here; record possible tainted-size/overflow risk.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*buf_size - *blen)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies sizeof(uint32_t) bytes into a TA-local out (&session_handle); src is from args (REE-controlled) but serialargs_get only calls TEE_MemMove when serialargs_get_ptr succeeded and the requested size equals the caller-provided size (sizeof(uint32_t)), so no evident overflow at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "The copy at line 34 writes a fixed small size (sizeof(uint32_t)) into a TA-local destination; callers pass that exact size and serialargs_get only performs the copy when serialargs_get_ptr succeeded, preventing an immediate size/overflow issue.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "serialargs_get:32-35",
      "evidence": "only calls TEE_MemMove when serialargs_get_ptr returns rc==0"
    },
    {
      "type": "type_validation",
      "location": "entry_find_objects:671-675",
      "evidence": "ptypes compared to expected exp_pt; out_count derived from out->memref.size"
    }
  ],
  "argument_safety": [
    {
      "arg": "out (session_handle)",
      "why_safe": "destination is TA-local stack sized for uint32_t",
      "evidence": "serialargs_get_session_from_handle calls serialargs_get(..., &session_handle, sizeof(uint32_t)) / serializer.c:161-164"
    },
    {
      "arg": "size",
      "why_safe": "caller provides concrete sizeof(uint32_t) and serialargs_get only copies that many bytes after ptr check",
      "evidence": "serializer.c:163 / object.c:163"
    }
  ],
  "residual_risks": [
    "line 366: copying TA rc to REE-visible buffer via TEE_MemMove (entry.c:366) is a separate information-flow concern recorded as a structural risk",
    "line 693: copying object handles into caller-provided out->memref.buffer (object.c:693) writes TA data to REE-visible memory; bounds depend on out->memref.size"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "copy size is fixed (sizeof(uint32_t)) and matches caller's provided size",
      "serialargs_get only performs copy when serialargs_get_ptr succeeded"
    ],
    "negative_indicators": [
      "serialargs_get_ptr internal checks not shown here (assumed to validate available bytes); exact implementation not available in this view"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No tainted-size or overflow is evident at this TEE_MemMove call: destination is TA-local of matching size and there is a prior check (serialargs_get_ptr) gating the copy. Thus it's not classified as vulnerable per memory-safety-first policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); structural information-flow to REE-visible memory.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "entry_find_objects",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctx->count*sizeof(uint32_t),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-side object handles into caller-provided out->memref.buffer; writes are bounded by out_count computed from REE-provided size but remain a structural risk.",
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 679,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Binding: serialargs_get_session_from_handle reads session handle from serialargs backed by ctrl->memref.buffer (REE-visible).",
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=args_remaining,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from serialargs-derived src (potentially REE-controlled) into caller-provided out; gated by serialargs_get_ptr success.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #124: TA_InvokeCommandEntryPoint -> entry_find_objects_final -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objects_finalserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 142.01秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Fixed-size copy (sizeof(uint32_t)) into an appropriately sized TA-local variable with an error return path makes this sink usage safe; lacking evidence of serialargs_get_ptr misbehaviour, not classified as vulnerable.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: entry_find_objects_final
プロンプト 中間 (entry_find_objects_final)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_find_objects_final” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [298]:
-- Call #1 at line 298 --
296: break;
297: case PKCS11_CMD_FIND_OBJECTS_FINAL:
298: >>> rc = entry_find_objects_final(client, ptypes, params);
299: break;
300: case PKCS11_CMD_GET_ATTRIBUTE_VALUE:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

710: enum pkcs11_rc entry_find_objects_final(struct pkcs11_client *client,
711: uint32_t ptypes, TEE_Param *params)
712: { 713: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 714: TEE_PARAM_TYPE_NONE, 715: TEE_PARAM_TYPE_NONE, 716: TEE_PARAM_TYPE_NONE); 717: TEE_Param *ctrl = params; 718: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 719: struct serialargs ctrlargs = { }; 720: struct pkcs11_session *session = NULL; 721: 722: if (!client || ptypes != exp_pt) 723: return PKCS11_CKR_ARGUMENTS_BAD; 724: 725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 726: 727: rc = serialargs_get_session_from_handle(&ctrlargs, client, &session); 728: if (rc) 729: return rc; 730: 731: if (serialargs_remaining_bytes(&ctrlargs)) 732: return PKCS11_CKR_ARGUMENTS_BAD; 733: 734: if (!session->find_ctx) 735: return PKCS11_CKR_OPERATION_NOT_INITIALIZED; 736: 737: release_session_find_obj_context(session); 738: 739: return PKCS11_CKR_OK; 740: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_find_objects_final", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_find_objects_final", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_find_objects_final)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_find_objects_final",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "params->memref.buffer",
      "params->memref.size",
      "ctrlargs"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:717-718"
      },
      {
        "lhs": "ctrlargs (buffer/size)",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:725"
      },
      {
        "lhs": "session",
        "rhs": "serialargs_get_session_from_handle(&ctrlargs, client, &session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:727"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:722-723",
        "evidence": "ptypes != exp_pt -> return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:731-732",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> return PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "state_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:734-735",
        "evidence": "if (!session->find_ctx) return PKCS11_CKR_OPERATION_NOT_INITIALIZED"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 298,
      "function": "entry_find_objects_final",
      "rule": "other",
      "why": "Binding callee parameter 'client' from caller-provided value (originates from TA_InvokeCommandEntryPoint); origin region unclear at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = entry_find_objects_final(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 298,
      "function": "entry_find_objects_final",
      "rule": "weak_input_validation",
      "why": "Alias of shared REE-provided params buffer passed into callee; callee will parse ctrl->memref.buffer/size (untrusted input).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_find_objects_final(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_find_objects_final at lines [727, 769, 942, 994, 1110]:
-- Call #1 at line 727 --
725: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
726:
727: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
728: if (rc)
729: return rc;
-- Call #2 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #3 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #4 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #5 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session assigned to output parameter",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns rv on failure and caller checks rv"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:168-169",
        "evidence": "if (!session) return PKCS11_CKR_SESSION_HANDLE_INVALID"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 727,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "Alias of shared REE-provided serialargs buffer passed into helper; serialargs_get reads a uint32_t handle from it (untrusted input).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 727,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding callee parameter 'client' from caller; origin (tee_session2client-derived) is unclear at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 727,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Output binding: caller passes &session (TA-local) as sess parameter; callee writes *sess = session.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=sizeof(void*),dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35",
        "evidence": "if (!rc) TEE_MemMove(...); serialargs_get returns rc to caller"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Alias of caller-provided serialargs 'args' (derived from REE memref buffer) passed into serialargs_get; reads src pointer from it (untrusted input).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding callee 'out' to caller-&session_handle (TA-local) at call-site; callee writes to caller-provided out buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from serialargs/REE buffer) into out via TEE_MemMove; src is untrusted and size-driven copy may be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied n bytes into dst)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from serialargs/REE buffer) into out (caller-provided); src is untrusted and length-driven copy may be attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies buf0 into ptr then copies src into ptr+buf0_sz; src/buf0 may originate from untrusted serialargs/REE buffers leading to unvalidated concatenation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies src into ptr+buf0_sz using size 'size' possibly derived from serialargs; addition of offsets may allow attacker-controlled overwrite if sizes/offsets unchecked.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data into buf + *blen; data may be REE-supplied and destination offset is attacker-influenced leading to potential overflow.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen)+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies fixed sizeof(uint32_t) (size passed by caller) from src into a caller-provided &session_handle whose size matches; serialargs_get returns an error if src unavailable.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer",
      "propagation_path": [
        "params->memref.buffer -> serialargs (serialargs_init) @ object.c:725",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src from serialargs buffer @ serializer.c:32",
        "serialargs_get -> TEE_MemMove(out, src, size) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) writing into TA-local session_handle"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE input providing fewer than 'size' bytes or malformed serialargs",
        "Absence of serialargs_get_ptr validation (not observed)"
      ],
      "attack_scenario": "If serialargs_get_ptr failed to validate available bytes, src could be invalid leading to read errors; however caller passes fixed size (sizeof(uint32_t)) and serialargs_get returns error on failure preventing copy.",
      "impact": "Potential crash or incorrect session handle if serialargs_get_ptr malformed; no direct data leak to REE from this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr enforces that 'size' bytes are available before returning success; document/assert sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size is caller-supplied constant sizeof(uint32_t) at call site",
        "serialargs_get returns rc and caller checks rv before using out",
        "dst is TA-local session_handle matching size"
      ],
      "negative_indicators": [
        "src originates from REE-visible buffer (untrusted)",
        "serialargs_get_ptr implementation not shown here"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Fixed-size copy (sizeof(uint32_t)) into an appropriately sized TA-local variable with an error return path makes this sink usage safe; lacking evidence of serialargs_get_ptr misbehaviour, not classified as vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy is a fixed-size memcpy of sizeof(uint32_t) into a matching TA-local variable and the helper returns an error if bytes are unavailable, preventing an unchecked tainted-length copy.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get (caller):163",
      "evidence": "caller checks rv and returns on error"
    },
    {
      "type": "type_validation",
      "location": "caller-site:163",
      "evidence": "size argument passed is sizeof(uint32_t) (fixed)"
    }
  ],
  "argument_safety": [
    {
      "arg": "out",
      "why_safe": "Caller passes &session_handle (TA-local) sized for uint32_t",
      "evidence": "serializer.c:163"
    },
    {
      "arg": "size",
      "why_safe": "Fixed constant sizeof(uint32_t) at call site",
      "evidence": "serializer.c:163"
    },
    {
      "arg": "src",
      "why_safe": "Derived from REE-provided serialargs and checked by serialargs_get/serialargs_get_ptr return code",
      "evidence": "serializer.c:32-34"
    }
  ],
  "residual_risks": [
    "line 34: src is REE-derived; if serialargs_get_ptr misreports success, copy could read invalid data"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed-size copy",
      "caller checks return value before copy",
      "dst size matches copy size"
    ],
    "negative_indicators": [
      "uncertainty about serialargs_get_ptr internals"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given a constant copy length and explicit error check, the TEE_MemMove at line 34 does not present a memory-safety or leakage vulnerability under observed context.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies size bytes from src (derived from serialargs/REE buffer) into out via TEE_MemMove; src is untrusted and size-driven copy may be attacker-controlled.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "why": "Copies buf0 into ptr then copies src into ptr+buf0_sz; src/buf0 may originate from untrusted serialargs/REE buffers leading to unvalidated concatenation.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Copies src into ptr+buf0_sz using size possibly derived from serialargs; addition of offsets may allow attacker-controlled overwrite if sizes/offsets unchecked.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialargs_helper",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen)+len"
        ]
      },
      "why": "Copies 'len' bytes from data into buf + *blen; data may be REE-supplied and destination offset is attacker-influenced leading to potential overflow.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #125: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 106.52秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Insufficient direct evidence of missing bounds validation at this exact call-site combined with the call-site using a fixed small size (uint32_t) leads to conservative decision of not marking this line vulnerable; structural risks remain and upstream sanitizers partially mitigate risk.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [769, 942, 994, 1110]:
-- Call #1 at line 769 --
767: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
768:
769: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
770: if (rc)
771: return rc;
-- Call #2 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #3 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #4 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session (assigned to caller-provided pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 769,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'args' parameter receives &ctrlargs (local TA struct) which contains a buffer initialized from REE memref -> indirect REE data origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 769,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'client' parameter is passed from caller; origin uncertain (propagated from TA_InvokeCommandEntryPoint), may be TA-private or unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 769,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Binding: callee 'sess' parameter receives &session (local TA pointer) — destination is TA-private for returning session pointer to caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (copy)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: callee 'args' parameter receives &ctrlargs which was initialized from REE memref buffer -> indirect REE-originated data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: callee 'out' parameter is &session_handle (caller stack) — destination for decoded value is TA-local but originates from caller-provided buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (likely pointer into args->buffer derived from REE) into caller-provided out without additional validation of content.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "caller-provided destination pointer",
        "site": "caller-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34)"
      },
      {
        "lhs": "src",
        "rhs": "pointer derived from args->buffer (which is initialized from REE memref)",
        "site": "caller-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34)"
      },
      {
        "lhs": "size",
        "rhs": "caller-supplied numeric length",
        "site": "caller-sites (e.g., /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee 'out' parameter is the caller's &session_handle (TA-local destination) passed into TEE_MemMove at call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee 'src' parameter originates from args->buffer which was initialized from an REE-provided memref (shared/REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee 'size' parameter is a caller-supplied length (numeric) used to control the copy; provenance and bounds validation depend on caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from a source that may be REE-visible into a TA destination without additional validation here; caller must ensure bounds and trustworthiness.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copy at this line moves 'size' bytes from src (derived from args->buffer which originates from REE) into a TA-local out; caller provided size (sizeof(uint32_t) at call-site) and upstream code has some checks but there is insufficient direct evidence here to mark it vulnerable.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided memref buffer used to initialize serialargs (ctrl->memref.buffer)",
      "propagation_path": [
        "params->memref.buffer -> serialargs_init(&ctrlargs, ...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:767",
        "serialargs_get_ptr(args,&src, size) -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) copies REE-derived bytes into TA-local memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls REE-provided params memref buffer and can craft contents and lengths",
        "Caller uses serialargs_get with attacker-controlled size"
      ],
      "attack_scenario": "Malicious REE data could cause unexpected values to be written into TA-local variables if bounds/semantics are not properly validated upstream.",
      "impact": "Potential manipulation of TA-local state (integrity) or crash if size/ptr validation absent; no direct evidence of sensitive data exfiltration from this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:34",
        "recommendation": "Ensure serialargs_get_ptr enforces that 'size' bytes are within args->buffer bounds and fail otherwise; assert size <= remaining_bytes."
      },
      {
        "type": "type_validation",
        "location": "caller:object.c:763-777",
        "recommendation": "Validate that requested sizes/types match expected object attribute sizes before copying into TA memory."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "src originates from REE-provided memref buffer (tainted)",
        "TEE_MemMove performs an unguarded copy at this line"
      ],
      "negative_indicators": [
        "Call-site uses a fixed sizeof(uint32_t) for this particular invocation",
        "Upstream code performs ptypes validation and checks serialargs_remaining_bytes in some paths"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Insufficient direct evidence of missing bounds validation at this exact call-site combined with the call-site using a fixed small size (uint32_t) leads to conservative decision of not marking this line vulnerable; structural risks remain and upstream sanitizers partially mitigate risk.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Upstream type checks and limited observed copy size (sizeof(uint32_t) at call-site) reduce likelihood of a direct exploitable vulnerability at this specific TEE_MemMove call, but structural risks remain.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_get_attribute_value:745-765",
      "evidence": "ptypes == exp_pt check"
    },
    {
      "type": "bounds_check",
      "location": "entry_get_attribute_value:781-784",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) validated"
    },
    {
      "type": "access_control",
      "location": "entry_get_attribute_value:792-796",
      "evidence": "check_access_attrs_against_token(...) enforced"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "initialized from params memref but later functions (serialargs_get_ptr/remaining_bytes) are expected to validate bounds",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:767 and serializer.c:32"
    },
    {
      "arg": "size",
      "why_safe": "call-site uses sizeof(uint32_t) in the observed invocation which is small and fixed",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:163"
    }
  ],
  "residual_risks": [
    "Line 34: weak_input_validation — copy uses caller-supplied 'size' and relies on serialargs_get_ptr for bounds; if serialargs_get_ptr is flawed, over-read/over-write possible",
    "Line 910: copying template to out->memref.buffer (TEE_MemMove at object.c:910) may expose attributes to REE (structural risk captured separately)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Data at sink is tainted from REE",
      "TEE_MemMove is an unguarded copy primitive"
    ],
    "negative_indicators": [
      "Call-site uses small fixed size (uint32_t)",
      "Upstream ptypes and remaining-bytes checks exist"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given upstream checks and fixed small copy size at the observed call-site, the evidence is insufficient to declare a definite vulnerability at TEE_MemMove line 34; instead structural risks and missing explicit local bounds checks are reported for mitigation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 301,
      "function": "entry_get_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Caller passes params (REE memrefs) into entry_get_attribute_value; these are the origin of tainted data used later.",
      "code_excerpt": "rc = entry_get_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Copies 'size' bytes from a source derived from REE into TA-local memory without local validation here; relies on caller and serialargs_get_ptr to ensure bounds.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-side attribute template into REE-visible out buffer; may expose attributes (some earlier logic attempts to mark sensitive/unavailable, but residual risk remains).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}
フロー #126: TA_InvokeCommandEntryPoint -> entry_get_object_size -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_object_sizeserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 118.74秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: Copy at line 34 moves a fixed small number of bytes from a validated serialargs source into TA-local storage with return/value checks; destination is TA-private so no unencrypted REE disclosure.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_object_size at lines [942, 994, 1110]:
-- Call #1 at line 942 --
940: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
941:
942: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
943: if (rc)
944: return rc;
-- Call #2 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #3 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session",
      "rv"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get return value checked and returned on error"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session return checked and error returned if NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 942,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'args' bound to caller ctrlargs which was initialized from ctrl->memref.buffer (REE-provided/shared buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 942,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'client' bound to caller 'client' (origin from tee_session2client in entry point; origin uncertain)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 942,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'sess' bound to caller '&session' (caller-local TEE-private pointer provided to receive session)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'args' bound to caller ctrlargs which was initialized from ctrl->memref.buffer (REE-provided/shared buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'client' bound to caller 'client' (origin from tee_session2client in entry point; origin uncertain)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'sess' bound to caller '&session' (caller-local TEE-private pointer provided to receive session)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'args' bound to caller ctrlargs which was initialized from ctrl->memref.buffer (REE-provided/shared buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'client' bound to caller 'client' (origin from tee_session2client in entry point; origin uncertain)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(struct pkcs11_client *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "alias of callee 'sess' bound to caller '&session' (caller-local TEE-private pointer provided to receive session)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=sizeof(struct pkcs11_session *),dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc",
      "session_handle"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out (written)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-35",
        "evidence": "serialargs_get_ptr return checked via rc before TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of callee 'args' bound to caller 'args/ctrlargs' which was initialized from ctrl->memref.buffer (REE-provided/shared buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get",
      "rule": "other",
      "why": "alias of callee 'out' bound to caller '&session_handle' (caller-local TEE-private storage to receive data)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from args, potentially REE-shared buffer) into out via TEE_MemMove; risk of copying REE-provided data into TA memory if src is shared",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest (written)",
        "rhs": "src",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr (written)",
        "rhs": "buf0",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz (written)",
        "rhs": "src",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen (written)",
        "rhs": "data",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller checks serialargs_get_ptr return before calling TEE_MemMove"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-69",
        "evidence": "alloc_and_get caller ensures ptr allocation before MemMove"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-190",
        "evidence": "caller checks available buffer space before MemMove or returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dest 'out' is written from src derived from args (which was initialized from ctrl->memref.buffer, REE-provided/shared); binding callee 'dest'/'src' to caller origins",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dest 'ptr' is written from buf0 (caller-provided) and then from src; binds callee args to caller buffers (ptr, buf0, src)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=allocated_ptr_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dest 'ptr+buf0_sz' is written from src (which may be REE-derived); binds callee args to caller origins",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size_or_src_size,dst_sz=allocated_ptr_sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "dest 'buf + *blen' (caller buffer) is written from data (caller-provided); binds callee args to caller buffer origins and sizes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=buffer_capacity - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove at line 34 copies sizeof(uint32_t) (caller requested size) from src derived from serialargs (REE-provided) into caller-local out (&session_handle) which is TA-private; serialargs_get_ptr return is checked before the copy and size is fixed, preventing overflow.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Copy at line 34 moves a fixed small number of bytes from a validated serialargs source into TA-local storage with return/value checks; destination is TA-private so no unencrypted REE disclosure.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get_ptr return value checked (rc) before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "serialargs_get_session_from_handle:163-169",
      "evidence": "pkcs11_handle2session NULL checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "validated by serialargs_get_ptr which returns error on insufficient data",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
    },
    {
      "arg": "out",
      "why_safe": "caller provides &session_handle (sized for uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:161-164"
    }
  ],
  "residual_risks": [
    "None significant for line 34; upstream REE-provided data is copied into TA memory (expected behavior)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "checked return from serialargs_get_ptr before copy",
      "fixed small copy size (sizeof(uint32_t))",
      "pkcs11_handle2session null check at caller"
    ],
    "negative_indicators": [
      "src originates from REE-shared memref buffer (untrusted input)",
      "some caller origins (tee_session2client) marked unknown"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and information-disclosure checks at this point indicate the copy is bounded, checked, and targets TA-private storage, so it is not a vulnerability for the considered sink.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "entry_get_object_size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies computed obj_size into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though obj_size is non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided params[0].memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #127: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 123.88秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks (serialargs_get_ptr) prevent out-of-bounds copy and the copied datum is not sensitive, so the TEE_MemMove at line 34 is not a vulnerability under the given policy.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [994, 1110]:
-- Call #1 at line 994 --
992: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
993:
994: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
995: if (rc)
996: return rc;
-- Call #2 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t)) (reads from args->buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session (assigned from pkcs11_handle2session result)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171-172"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get enforces reading exactly sizeof(uint32_t) and returns error code on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "caller passes address of ctrlargs (contains pointer into REE-provided memref buffer) as 'args' — callee will read from REE-visible data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "caller-provided client pointer (derived from tee_session) is forwarded to callee; origin is tainted/unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "address of local session variable passed as output parameter into callee (callee writes back session pointer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=NA,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "rule": "weak_input_validation",
      "why": "session_handle is read from args (REE-controlled) and then used with pkcs11_handle2session without stronger validation of handle semantics",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); session = pkcs11_handle2session(session_handle, client);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (written from src)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33",
        "evidence": "checks rc from serialargs_get_ptr and only performs TEE_MemMove if rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get",
      "rule": "other",
      "why": "args parameter is alias of ctrlargs which wraps REE-provided memref buffer; callee reads src from args (shared/REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 994,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out parameter (&session_handle) is a TA-private destination passed into callee and will be written with data from args",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=NA,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from src (from args/REE) into out (TA-private); source is REE-controlled shared memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "relies on serialargs_get_ptr to validate that 'size' bytes are available in args->buffer; if that check is insufficient, TEE_MemMove may copy out-of-bounds or unexpected data",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "data copied from src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "out",
        "rhs": "data copied from src via TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data copied from data via TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller checks rc from serialargs_get_ptr and only calls TEE_MemMove if rc == 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (derived from args/REE-controlled buffer) into out (TA-private); source is REE-visible shared memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "First copy writes buf0 (likely REE-origin) into ptr (TA-private), second call (line 67) appends src into ptr; origins differ and src may be REE-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=allocated_ptr_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (potentially REE-controlled) into ptr+buf0_sz (TA-private); offset arithmetic uses buf0_sz which must be trusted.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=allocated_ptr_size - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Appends 'len' bytes from data into buf+*blen; data/source provenance unclear (could be REE), and write uses dynamic offset *blen.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=buffer_total_size - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies sizeof(uint32_t) bytes from src derived via serialargs_get_ptr(args) into out; serialargs_get_ptr/serialargs_get return error if bytes unavailable, preventing the copy and avoiding out-of-bounds, and data is not sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params memref buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "params (caller) -> ctrl (alias) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:978",
        "ctrl->memref.buffer -> serialargs_init/serialargs_get_ptr -> serialargs_get -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "src -> TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) writing into TA-private out"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls REE-side params memref with enough bytes",
        "No sanitizer would have prevented serialargs_get_ptr from succeeding (but evidence shows it fails if bytes insufficient)"
      ],
      "attack_scenario": "Attacker supplies malformed session_handle value; pkcs11_handle2session later may treat handle as invalid but copying itself does not expose secrets.",
      "impact": "Low — potential invalid handle leading to denial of service or error returns, but not sensitive data disclosure from this copy"
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get:32-34",
        "recommendation": "Ensure serialargs_get_ptr performs strict bounds checks and enforces canonical limits on handles; consider range checks on session_handle after copy"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get only calls TEE_MemMove when serialargs_get_ptr returned rc==0",
        "size used is sizeof(uint32_t) (small fixed size)"
      ],
      "negative_indicators": [
        "origin of args buffer is REE-visible shared memory (tainted)",
        "further validation of session_handle semantics relies on pkcs11_handle2session"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks (serialargs_get_ptr) prevent out-of-bounds copy and the copied datum is not sensitive, so the TEE_MemMove at line 34 is not a vulnerability under the given policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 34 is guarded by serialargs_get_ptr/serialargs_get which return errors if requested bytes are not available, and the data copied (session handle) is not classified as sensitive.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serialargs_get:32-34",
      "evidence": "serialargs_get checks rc from serialargs_get_ptr and only performs TEE_MemMove if rc == 0"
    }
  ],
  "argument_safety": [
    {
      "arg": "args / ctrl->memref.buffer",
      "why_safe": "serialargs_get_ptr validates availability of 'size' bytes before returning success",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
    },
    {
      "arg": "out",
      "why_safe": "out is TA-private local storage (e.g., &session_handle) sized for sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:29-36"
    }
  ],
  "residual_risks": [
    "line 34: upstream REE-controlled data reaches TA-private state; if serialargs_get_ptr has a bug or is bypassed, out-of-bounds or incorrect handle values could occur",
    "object.c:1040-1048: template->attrs_size from REE used to compute template_size — weak validation noted earlier"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit rc check before TEE_MemMove in serialargs_get",
      "fixed small copy size (sizeof(uint32_t))"
    ],
    "negative_indicators": [
      "origin buffer is REE-shared",
      "some other code paths use REE-provided sizes to compute allocations with less validation"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the explicit guard (serialargs_get_ptr -> serialargs_get) and the non-sensitive nature of the copied data, the sink at line 34 is considered safe; remaining concerns are structural and elsewhere in the call chain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is not sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_init/alloc consume caller-provided memref and template->attrs_size (from REE) is used to compute template_size without strong validation.",
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 163,
      "function": "serialargs_get_session_from_handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "session_handle is read from args (REE-controlled) and then used with pkcs11_handle2session without stronger validation of handle semantics.",
      "code_excerpt": "rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); session = pkcs11_handle2session(session_handle, client);"
    }
  ]
}
フロー #128: TA_InvokeCommandEntryPoint -> entry_copy_object -> serialargs_get_session_from_handle -> serialargs_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectserialargs_get_session_from_handleserialargs_getTEE_MemMove

実行時間: 108.85秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided params ctrl->memref.buffer

シンク: TEE_MemMove(out, src, size) writing attacker-controlled bytes into session_handle

判定理由: Untrusted REE bytes are copied into a TA-private integer (session_handle) used subsequently to resolve sessions; while bounds reads are checked, there is insufficient semantic validation of the handle value, enabling attacker-controlled session selection. This is a weak input validation issue, not an unencrypted-output or direct buffer overflow.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: serialargs_get_session_from_handle
プロンプト 中間 (serialargs_get_session_from_handle)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get_session_from_handle” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1110]:
-- Call #1 at line 1110 --
1108: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
1109:
1110: >>> rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);
1111: if (rc)
1112: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

155: enum pkcs11_rc serialargs_get_session_from_handle(struct serialargs *args,
156: struct pkcs11_client *client,
157: struct pkcs11_session **sess)
158: { 159: uint32_t rv = PKCS11_CKR_GENERAL_ERROR; 160: uint32_t session_handle = 0; 161: struct pkcs11_session *session = NULL; 162: 163: rv = serialargs_get(args, &session_handle, sizeof(uint32_t)); 164: if (rv) 165: return rv; 166: 167: session = pkcs11_handle2session(session_handle, client); 168: if (!session) 169: return PKCS11_CKR_SESSION_HANDLE_INVALID; 170: 171: *sess = session; 172: 173: return PKCS11_CKR_OK; 174: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get_session_from_handle", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get_session_from_handle", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get_session_from_handle)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get_session_from_handle",
    "tainted_vars": [
      "args",
      "client",
      "sess",
      "session_handle",
      "session"
    ],
    "propagation": [
      {
        "lhs": "session_handle",
        "rhs": "serialargs_get(args, &session_handle, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165"
      },
      {
        "lhs": "session",
        "rhs": "pkcs11_handle2session(session_handle, client)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169"
      },
      {
        "lhs": "*sess",
        "rhs": "session assigned at *sess = session",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:171"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:163-165",
        "evidence": "serialargs_get returns error code which is checked and propagated"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167-169",
        "evidence": "pkcs11_handle2session result is checked and returns SESSION_HANDLE_INVALID if NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs initialized from caller ctrl->memref.buffer (caller REE-provided memref), so callee reads REE-visible bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'client' parameter is caller's client (origin from tee_session2client) with unclear region/provenance.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_client *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1110,
      "function": "serialargs_get_session_from_handle",
      "rule": "other",
      "why": "Call-site binding: 'sess' parameter is address of caller-local 'session' (TEE-private); callee writes back a session pointer into caller space.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(struct pkcs11_session *),src_sz=unknown,dst_sz=sizeof(struct pkcs11_session *)"
        ]
      },
      "code_excerpt": "rc = serialargs_get_session_from_handle(&ctrlargs, client, &session);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get_session_from_handle at lines [163]:
-- Call #1 at line 163 --
161: struct pkcs11_session *session = NULL;
162:
163: >>> rv = serialargs_get(args, &session_handle, sizeof(uint32_t));
164: if (rv)
165: return rv;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies from src into out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33",
        "evidence": "serialargs_get_ptr return code checked (rc) before performing TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1110,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases ctrlargs initialized from ctrl->memref.buffer (caller REE-provided memref), so callee reads from REE-visible buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_get(&ctrlargs, &session_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (derived from args buffer, i.e., REE-provided) into out without validating content, potentially letting untrusted bytes drive session_handle.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1110,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is address of local session_handle (TEE-private) so callee writes parsed value into caller-local storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "serialargs_get(&ctrlargs, &session_handle, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "copy from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dst",
        "rhs": "copy from buf0 via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "dst",
        "rhs": "copy from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "dst",
        "rhs": "copy from data via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove is a raw memory copy; caller is expected to ensure src/dst/size validity"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from args which may be REE-provided) into out without content validation; untrusted bytes can control copied data.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 (origin not proven here) into allocated ptr; origin region of buf0 is unknown at this call-site.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src into ptr+buf0_sz; src provenance may be REE-visible and size is caller-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'len' bytes from data into buf + *blen; provenance of data and current buf length should be validated by caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(uint32_t) bytes from src derived from REE-provided ctrl->memref.buffer into a TA-private out (session_handle) without content validation, allowing attacker-controlled session_handle.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided params ctrl->memref.buffer",
      "propagation_path": [
        "ctrl->memref.buffer -> ctrlargs (serialargs_init) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src (pointer into ctrl buffer) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) copies REE bytes into caller-local session_handle (out) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34",
        "pkcs11_handle2session(session_handle, client) uses session_handle to resolve session @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:167 and /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1111"
      ],
      "sink": "TEE_MemMove(out, src, size) writing attacker-controlled bytes into session_handle"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted ctrl->memref.buffer (REE caller)",
        "No higher-level validation of session_handle value before use"
      ],
      "attack_scenario": "Malicious REE client crafts ctrl buffer so session_handle resolves to another session or causes session lookup to fail/return unexpected session, influencing subsequent object access/authorization.",
      "impact": "Potential unauthorized session resolution or denial of service via invalid session handle; could lead to unauthorized access checks or session confusion."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "serialargs_get:32-34",
        "recommendation": "Validate parsed session_handle value against expected bounds and client context before assigning; ensure it maps to a legitimate session for this client."
      },
      {
        "type": "access_control",
        "location": "pkcs11_handle2session:167-169",
        "recommendation": "Enforce additional checks that session belongs to the client and is in an expected state before returning it to caller."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy from REE-visible buffer into session_handle at line 34",
        "Later use of session_handle in pkcs11_handle2session without prior validation of value"
      ],
      "negative_indicators": [
        "serialargs_get_ptr/serialargs_get return codes are checked before the copy (prevents out-of-bounds read)",
        "pkcs11_handle2session returns NULL if handle invalid (some protection)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Untrusted REE bytes are copied into a TA-private integer (session_handle) used subsequently to resolve sessions; while bounds reads are checked, there is insufficient semantic validation of the handle value, enabling attacker-controlled session selection. This is a weak input validation issue, not an unencrypted-output or direct buffer overflow.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 34,
        "function": "serialargs_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies REE-controlled bytes into session_handle (TA-private) without validating the parsed value's legitimacy for the client."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "serialargs_get:32-33",
      "evidence": "serialargs_get_ptr return code checked before TEE_MemMove"
    },
    {
      "type": "null_check",
      "location": "serialargs_get_session_from_handle:167-169",
      "evidence": "pkcs11_handle2session returns NULL if handle invalid"
    }
  ],
  "argument_safety": [
    {
      "arg": "args / src",
      "why_safe": "Bounds/read size checked by serialargs_get_ptr and return code validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out (session_handle)",
      "why_safe": "Out is a valid local storage location (no overflow), but content is unvalidated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
    }
  ],
  "residual_risks": [
    "Line 34: although memory bounds are checked prior to copy, semantic validation of session_handle is missing and could allow attacker-controlled session selection."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of copy from REE buffer to session_handle",
      "Subsequent use of session_handle to look up session"
    ],
    "negative_indicators": [
      "serialargs_get_ptr and pkcs11_handle2session perform basic checks"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "This is classified as weak_input_validation because untrusted REE bytes are interpreted as a session handle via a direct copy into TA-private storage and then used to resolve sessions; existing checks prevent raw memory errors but do not validate the semantic correctness or authorization of the handle.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies obj_handle into caller-provided out->memref.buffer (REE-visible); structurally notable but not promoted to unencrypted_output.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "why": "Copies buf0 into allocated buffer; origin of buf0 unclear at this call-site.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    }
  ]
}
フロー #129: TA_InvokeCommandEntryPoint -> entry_wrap_key -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyserialargs_getTEE_MemMove

実行時間: 92.50秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: At this specific sink (serializer.c:34) the caller supplied size == sizeof(uint32_t) and out points to a uint32_t, so the copy cannot overflow; therefore not vulnerable.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1141, 1145]:
-- Call #1 at line 1141 --
1139: return rc;
1140:
1141: >>> rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t));
1142: if (rc)
1143: return rc;
-- Call #2 at line 1145 --
1143: return rc;
1144:
1145: >>> rc = serialargs_get(&ctrlargs, &key_handle, sizeof(uint32_t));
1146: if (rc)
1147: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "src (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:33-34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1141,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter receives address of ctrlargs (TA struct that references REE-provided buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1141,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'out' parameter is &wrapping_key_handle (TA-private destination for data copied from args buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1141,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: 'size' parameter is sizeof(uint32_t) (caller-provided scalar).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &wrapping_key_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from caller-controlled serial buffer) into out without further validation of src contents or that size fits destination.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(out)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dst",
        "rhs": "buf0 / src (copied in alloc_and_get)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' is callee-provided pointer (alias of caller's out) at serialargs_get call.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from serialargs buffer, REE-controlled) into out without validating src contents or size against destination capacity.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TA-allocated target (alias passed into helper).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: second call writes src into ptr+buf0_sz; src origin uncertain (could be REE-derived).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: this call writes additional src region into assembled buffer; src may be REE-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'buf + *blen' is buffer managed by caller; pointer aliasing of shared/TEE buffer uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=*blen+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from data (caller-controlled) into buf+*blen without explicit bounds check against buffer capacity in this call-site.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Call copies 'size' bytes into 'out' where caller passed sizeof(uint32_t) as size and 'out' is &wrapping_key_handle (uint32_t), so copy length equals destination size; no overflow at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller serial buffer (ctrl->memref.buffer) derived from REE params",
      "propagation_path": [
        "params (TEE_Param) -> ctrlargs (serialargs_init) @ processing.c:1135",
        "serialargs_get_ptr -> src @ serializer.c:32",
        "TEE_MemMove(out, src, size) @ serializer.c:34; out is &wrapping_key_handle passed by caller @ processing.c:1141"
      ],
      "sink": "TEE_MemMove(out, src, size) at serializer.c:34 (destination is TA-local uint32_t)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls serial buffer contents in params[0]",
        "Caller invokes serialargs_get with a size larger than destination (not the case here)"
      ],
      "attack_scenario": "If caller had passed a size larger than the destination capacity, crafted serial data could overflow the destination variable.",
      "impact": "Potential memory corruption of TA-local data if size mismatched; at this call size matches 4 bytes so no impact here."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32-34",
        "recommendation": "Ensure serialargs_get_ptr enforces remaining buffer >= requested size and callers always pass a size validated against destination capacity."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Size passed at call-site is sizeof(uint32_t) (fixed) matching destination",
        "serialargs_get returns error on serialargs_get_ptr failure before copy"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not shown here; internal bounds check unknown",
        "src region originates from REE-controlled memref buffer"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "At this specific sink (serializer.c:34) the caller supplied size == sizeof(uint32_t) and out points to a uint32_t, so the copy cannot overflow; therefore not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy length equals the destination size at this call-site and an earlier check prevents serialargs_get_ptr failure from reaching the copy, so no tainted-length overflow occurs here.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "processing.c:1131",
      "evidence": "ptypes must equal exp_pt or caller returns"
    },
    {
      "type": "size_constant",
      "location": "entry_wrap_key -> serialargs_get call sites: processing.c:1141,1145",
      "evidence": "serialargs_get invoked with sizeof(uint32_t)"
    },
    {
      "type": "error_check",
      "location": "serializer.c:32-34",
      "evidence": "if (!rc) TEE_MemMove(...)"
    }
  ],
  "argument_safety": [
    {
      "arg": "out (serialargs_get call at processing.c:1141)",
      "why_safe": "Caller passes &wrapping_key_handle (uint32_t) and size == sizeof(uint32_t)",
      "evidence": "processing.c:1141, serializer.c:34"
    }
  ],
  "residual_risks": [
    "processing.c:1266 writes wrapped key bytes into params[2].memref.buffer (REE-visible) from TA-private key_data with out_size derived from params[2].memref.size — potential sensitive TA-private data exposure to REE (structural_risk recorded earlier).",
    "serializer.c:33 copies data originating from REE-controlled serial buffer; while this call-site is safe, other call-sites with different sizes may be risky if sizes mismatch or serialargs_get_ptr lacks bounds checks."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed size (sizeof(uint32_t)) passed to serialargs_get at call-site",
      "Error return from serialargs_get_ptr prevents copy on failure"
    ],
    "negative_indicators": [
      "serialargs_get_ptr internals not included; theoretical missing bounds checks there",
      "Other parts of call chain write TA-private sensitive data into REE-visible buffers"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: no size mismatch at this sink, so no overflow; information-disclosure concerns exist elsewhere in the chain but not at this specific TEE_MemMove invocation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes TA-private key_data into params[2].memref.buffer (REE-visible) with out_size controlled by params[2].memref.size; potential disclosure or overflow if out_size unchecked.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 33,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(out)"
        ]
      },
      "why": "Copies 'size' bytes from src derived from a REE-controlled serial buffer into out without further validation of src contents; relies on callers to ensure size matches destination.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #130: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_slot_infoserialargs_getTEE_MemMove

実行時間: 122.24秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The copy at line 34 moves data from REE into TA memory; it's a potential weak-input-validation issue but not an unencrypted output to REE. Upstream checks exist but this function lacks its own explicit validation.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: entry_ck_slot_info
プロンプト 中間 (entry_ck_slot_info)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_slot_info” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [164]:
-- Call #1 at line 164 --
162: break;
163: case PKCS11_CMD_SLOT_INFO:
164: >>> rc = entry_ck_slot_info(ptypes, params);
165: break;
166: case PKCS11_CMD_TOKEN_INFO:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

309: enum pkcs11_rc entry_ck_slot_info(uint32_t ptypes, TEE_Param *params)
310: { 311: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 312: TEE_PARAM_TYPE_NONE, 313: TEE_PARAM_TYPE_MEMREF_OUTPUT, 314: TEE_PARAM_TYPE_NONE); 315: TEE_Param *ctrl = params; 316: TEE_Param *out = params + 2; 317: enum pkcs11_rc rc = PKCS11_CKR_OK; 318: struct serialargs ctrlargs = { }; 319: uint32_t token_id = 0; 320: struct pkcs11_slot_info info = { 321: .slot_description = PKCS11_SLOT_DESCRIPTION, 322: .manufacturer_id = PKCS11_SLOT_MANUFACTURER, 323: .flags = PKCS11_CKFS_TOKEN_PRESENT, 324: .hardware_version = PKCS11_SLOT_HW_VERSION, 325: .firmware_version = PKCS11_SLOT_FW_VERSION, 326: }; 327: 328: COMPILE_TIME_ASSERT(sizeof(PKCS11_SLOT_DESCRIPTION) <= 329: sizeof(info.slot_description)); 330: COMPILE_TIME_ASSERT(sizeof(PKCS11_SLOT_MANUFACTURER) <= 331: sizeof(info.manufacturer_id)); 332: 333: if (ptypes != exp_pt || out->memref.size != sizeof(info)) 334: return PKCS11_CKR_ARGUMENTS_BAD; 335: 336: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 337: 338: rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id)); 339: if (rc) 340: return rc; 341: 342: if (serialargs_remaining_bytes(&ctrlargs)) 343: return PKCS11_CKR_ARGUMENTS_BAD; 344: 345: if (!get_token(token_id)) 346: return PKCS11_CKR_SLOT_ID_INVALID; 347: 348: set_token_description(&info); 349: 350: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id)); 351: 352: out->memref.size = sizeof(info); 353: TEE_MemMove(out->memref.buffer, &info, out->memref.size); 354: 355: return PKCS11_CKR_OK; 356: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_slot_info", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_slot_info", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_slot_info)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_slot_info",
    "tainted_vars": [
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "ctrlargs",
      "token_id",
      "info"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:315-316"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:315-316"
      },
      {
        "lhs": "ctrlargs (buffer/size)",
        "rhs": "ctrl->memref.buffer / ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:336"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(token_id)) reads from ctrlargs (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:338-340"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&info (local struct)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:352-354"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:311-314,333-334",
        "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info) checked"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:342-343",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) == 0 enforced"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 164,
      "function": "entry_ck_slot_info",
      "rule": "other",
      "why": "Binding of callee params pointer to caller-provided params (alias of shared buffer passed into helper).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_slot_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 338,
      "function": "entry_ck_slot_info",
      "rule": "weak_input_validation",
      "why": "token_id is read from caller-controlled ctrl->memref.buffer and used in get_token lookup (input drives control flow).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(token_id),src_sz=ctrl->memref.size,dst_sz=sizeof(token_id)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "rule": "other",
      "why": "Copies local struct info into caller-provided out->memref.buffer (shared/REE-visible destination).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_slot_info at lines [338, 392, 459, 515, 519, 621, 625, 757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 338 --
336: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
337:
338: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
339: if (rc)
340: return rc;
-- Call #2 at line 392 --
390: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
391:
392: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
393: if (rc)
394: return rc;
-- Call #3 at line 459 --
457: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
458:
459: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
460: if (rc)
461: return rc;
-- Call #4 at line 515 --
513: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
514:
515: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
516: if (rc)
517: return rc;
-- Call #5 at line 519 --
517: return rc;
518:
519: >>> rc = serialargs_get(&ctrlargs, &type, sizeof(uint32_t));
520: if (rc)
521: return rc;
-- Call #6 at line 621 --
619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
620:
621: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
622: if (rc)
623: return rc;
-- Call #7 at line 625 --
623: return rc;
624:
625: >>> rc = serialargs_get(&ctrlargs, &flags, sizeof(flags));
626: if (rc)
627: return rc;
-- Call #8 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #9 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #10 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #11 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #12 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #13 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #14 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #15 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #16 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out (callee buffer)",
        "rhs": "TEE_MemMove(out, src, size) copies from src into out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 336,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding of serialargs_get's args/src to caller-controlled ctrl->memref.buffer (alias of shared buffer passed into helper).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src into out via TEE_MemMove without local verification of src length in this function (relies on serialargs_get_ptr).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "unknown:call-site"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "unknown:call-site"
      },
      {
        "lhs": "dest (after)",
        "rhs": "copy of src bytes (n)",
        "site": "unknown:call-site"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies size bytes from src (bound to caller ctrl->memref.buffer) into out without local verification here; relies on upstream checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 into allocated ptr; provenance of buf0 unclear (could be REE or TA), so origin is unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies src into ptr+buf0_sz; src provenance not established in this site, so treated as unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data into buf+*blen; provenance of data not asserted here and destination is TA buffer—origin unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "This call copies size bytes from REE-origin src into a TA-local destination (REE->TA); not an unencrypted REE output. Potential weak input validation remains but does not make this line an REE-output vulnerability.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided memref buffer (REE-visible)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_get_ptr -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "src -> TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34",
        "out was &token_id (TA-local) at call-site in entry_ck_slot_info @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:338"
      ],
      "sink": "TEE_MemMove copying into TA-local buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious or malformed data supplied in REE memref buffer",
        "serialargs_get_ptr does not sufficiently validate length/contents"
      ],
      "attack_scenario": "Malformed input could cause out to receive unexpected values (e.g., token_id), potentially altering control flow or causing logic errors.",
      "impact": "Logic misuse or denial of expected behavior; no direct confidential data exfiltration at this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:34",
        "recommendation": "Verify src length and that serialargs_get_ptr returned a buffer of at least 'size' bytes before memcpy; perform explicit size checks in this function."
      },
      {
        "type": "type_validation",
        "location": "entry_ck_slot_info:336-338",
        "recommendation": "Ensure serialargs_init and serialargs_get_ptr enforce expected encoding and sizes for each field."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "src is bound to caller-controlled ctrl->memref.buffer",
        "TEE_MemMove performs an unchecked copy here"
      ],
      "negative_indicators": [
        "serialargs_get_ptr may perform validation (call-site relies on it)",
        "higher-level callers perform ptypes/out->memref.size checks"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 34 moves data from REE into TA memory; it's a potential weak-input-validation issue but not an unencrypted output to REE. Upstream checks exist but this function lacks its own explicit validation.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The TEE_MemMove at line 34 copies from REE to TA-local memory (REE->TA) and does not produce REE-visible plaintext output; sanitization responsibilities are shared upstream.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_slot_info:333-334",
      "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info) checked"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_slot_info:342-343",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) == 0 enforced at callers"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (serialargs_get)",
      "why_safe": "Expected to be validated by serialargs_get_ptr; caller initializes serialargs with ctrl->memref.buffer/size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
    },
    {
      "arg": "out (serialargs_get)",
      "why_safe": "At call-site out is &token_id (TA-local) so destination is TA-private; not an REE-visible sink",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:336-338"
    }
  ],
  "residual_risks": [
    "line 34: weak input validation - serialargs_get relies on serialargs_get_ptr for validation; if that function is flawed, over-read or malformed-field attacks are possible"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from REE-origin buffer into TA memory at line 34"
    ],
    "negative_indicators": [
      "Upstream callers perform type/size checks; serialargs_get_ptr may validate bounds"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No REE-visible output occurs at the target sink line; the primary concern is weak input validation which is a structural risk but not classified as a vulnerability for REE-output policies.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies size bytes from REE-provided src into out without local verification in this function; relies on serialargs_get_ptr/upstream validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #131: TA_InvokeCommandEntryPoint -> entry_ck_token_info -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_infoserialargs_getTEE_MemMove

実行時間: 156.70秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The sink at line 34 copies REE-derived bytes into a TA-local buffer; it does not send TA-private secrets to REE (so unencrypted_output is not applicable). No direct evidence of a bounds overflow at this call-site is visible because serialargs_get_ptr is expected to perform checks; thus we do not mark it vulnerable but flag residual/structural risks.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: entry_ck_token_info
プロンプト 中間 (entry_ck_token_info)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_token_info” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [167]:
-- Call #1 at line 167 --
165: break;
166: case PKCS11_CMD_TOKEN_INFO:
167: >>> rc = entry_ck_token_info(ptypes, params);
168: break;
169: case PKCS11_CMD_MECHANISM_IDS:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

358: enum pkcs11_rc entry_ck_token_info(uint32_t ptypes, TEE_Param *params)
359: { 360: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 361: TEE_PARAM_TYPE_NONE, 362: TEE_PARAM_TYPE_MEMREF_OUTPUT, 363: TEE_PARAM_TYPE_NONE); 364: TEE_Param *ctrl = params; 365: TEE_Param *out = params + 2; 366: enum pkcs11_rc rc = PKCS11_CKR_OK; 367: struct serialargs ctrlargs = { }; 368: uint32_t token_id = 0; 369: struct ck_token *token = NULL; 370: struct pkcs11_token_info info = { 371: .manufacturer_id = PKCS11_TOKEN_MANUFACTURER, 372: .model = PKCS11_TOKEN_MODEL, 373: .max_session_count = UINT32_MAX, 374: .max_rw_session_count = UINT32_MAX, 375: .max_pin_len = PKCS11_TOKEN_PIN_SIZE_MAX, 376: .min_pin_len = PKCS11_TOKEN_PIN_SIZE_MIN, 377: .total_public_memory = UINT32_MAX, 378: .free_public_memory = UINT32_MAX, 379: .total_private_memory = UINT32_MAX, 380: .free_private_memory = UINT32_MAX, 381: .hardware_version = PKCS11_TOKEN_HW_VERSION, 382: .firmware_version = PKCS11_TOKEN_FW_VERSION, 383: }; 384: char sn[sizeof(info.serial_number) + 1] = { 0 }; 385: int n = 0; 386: 387: if (ptypes != exp_pt || out->memref.size != sizeof(info)) 388: return PKCS11_CKR_ARGUMENTS_BAD; 389: 390: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 391: 392: rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id)); 393: if (rc) 394: return rc; 395: 396: if (serialargs_remaining_bytes(&ctrlargs)) 397: return PKCS11_CKR_ARGUMENTS_BAD; 398: 399: token = get_token(token_id); 400: if (!token) 401: return PKCS11_CKR_SLOT_ID_INVALID; 402: 403: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id)); 404: pad_str(info.model, sizeof(info.model)); 405: 406: n = snprintf(sn, sizeof(sn), "%0*"PRIu32, 407: (int)sizeof(info.serial_number), token_id); 408: if (n != (int)sizeof(info.serial_number)) 409: TEE_Panic(0); 410: 411: TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number)); 412: pad_str(info.serial_number, sizeof(info.serial_number)); 413: 414: TEE_MemMove(info.label, token->db_main->label, sizeof(info.label)); 415: 416: info.flags = token->db_main->flags; 417: info.session_count = token->session_count; 418: info.rw_session_count = token->rw_session_count; 419: 420: TEE_MemMove(out->memref.buffer, &info, sizeof(info)); 421: 422: return PKCS11_CKR_OK; 423: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_token_info", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_token_info", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_token_info)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_token_info",
    "tainted_vars": [
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "ctrlargs",
      "token_id"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:364-365"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:364-365"
      },
      {
        "lhs": "ctrlargs (initialized)",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:390"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(token_id))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:392-394"
      },
      {
        "lhs": "token (lookup)",
        "rhs": "get_token(token_id)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:399-401"
      },
      {
        "lhs": "info (filled)",
        "rhs": "local initializers, snprintf(serial), token->db_main->label, token fields",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:370-419"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:360-364,387-388",
        "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to sizeof(info)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:392-397",
        "evidence": "serialargs_get reads token_id and serialargs_remaining_bytes ensures no extra bytes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 167,
      "function": "entry_ck_token_info",
      "rule": "other",
      "why": "alias of shared params buffer passed from TA_InvokeCommandEntryPoint into callee; callee will read/write memrefs sourced from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_token_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "entry_ck_token_info",
      "rule": "other",
      "why": "Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared though info appears non-sensitive.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_info at lines [392, 459, 515, 519, 621, 625, 757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 392 --
390: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
391:
392: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
393: if (rc)
394: return rc;
-- Call #2 at line 459 --
457: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
458:
459: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
460: if (rc)
461: return rc;
-- Call #3 at line 515 --
513: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
514:
515: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
516: if (rc)
517: return rc;
-- Call #4 at line 519 --
517: return rc;
518:
519: >>> rc = serialargs_get(&ctrlargs, &type, sizeof(uint32_t));
520: if (rc)
521: return rc;
-- Call #5 at line 621 --
619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
620:
621: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
622: if (rc)
623: return rc;
-- Call #6 at line 625 --
623: return rc;
624:
625: >>> rc = serialargs_get(&ctrlargs, &flags, sizeof(flags));
626: if (rc)
627: return rc;
-- Call #7 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #8 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #9 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #10 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #11 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #12 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #13 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #14 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #15 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out (written)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr may perform bounds checks before returning src (not in this function)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 392,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee parameter 'args' is bound to caller's &ctrlargs (TA-private) which was initialized from REE buffer; argument carries REE-derived buffer pointer internally.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 392,
      "function": "serialargs_get",
      "rule": "other",
      "why": "callee parameter 'out' is bound to caller-local &token_id (TEE-private); serialargs_get will write into this caller-provided buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(token_id),src_sz=unknown,dst_sz=sizeof(token_id)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (obtained from args which references REE-visible memref) into out (caller buffer); flow moves REE-origin data into TA caller buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr",
        "rhs": "buf0 via TEE_MemMove(ptr, buf0, buf0_sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz",
        "rhs": "src via TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data via TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller is expected to have validated sizes; this function does not perform bounds checks itself"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'size' bytes from src (obtained from serialargs_get_ptr which may reference REE-provided memref) into caller buffer 'out'; binds callee params to REE-derived source and caller destination.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 into newly allocated ptr; binds callee dst 'ptr' (TA-private) to src 'buf0' (origin unclear from context).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Appends 'size' bytes from src into ptr+buf0_sz; binds callee dst (ptr+offset) as TA-private and src origin as unknown/possibly REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Writes 'len' bytes from data into buf + *blen (buffer growth); destination may be TA-managed but size/offset depend on caller-controlled *blen and len.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "This call copies 'size' bytes from src (which may originate from REE) into a TA-local destination 'out' (caller-provided TA buffer); it is not a REE-facing output so 'unencrypted_output' promotion does not apply and no clear bounds violation is visible here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided memref buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "params[0]/ctrl->memref.buffer -> serialargs_init/serialargs_get_ptr @ pkcs11_token.c:390 / serializer.c:32",
        "serialargs_get_ptr -> src @ serializer.c:32",
        "TEE_MemMove(out, src, size) @ serializer.c:34 (sink)"
      ],
      "sink": "serialargs_get writes into caller buffer 'out' via TEE_MemMove"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted REE memref and serialized payload",
        "serialargs_get_ptr returns pointer to REE-controlled data and 'size' is attacker-controlled within validated bounds"
      ],
      "attack_scenario": "Malicious REE input could cause unexpected values to be written into TA-local variables read later, potentially causing logic errors if callers assume trusted data.",
      "impact": "Data integrity issues inside TA; not direct leakage to REE from this line"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr strictly validates remaining length >= size and that callers validate 'size' against destination buffer capacity before TEE_MemMove."
      },
      {
        "type": "type_validation",
        "location": "entry_ck_token_info:pkcs11_token.c:387-388",
        "recommendation": "Maintain and document the invariants checked here; add explicit checks correlating serialized lengths to expected field sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Caller (entry_ck_token_info) validates param types and out->memref.size against sizeof(info)",
        "serialargs_get returns rc on failure and only performs copy when serialargs_get_ptr succeeds"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not shown here; bounds checks are assumed but not visible",
        "Some TEE_MemMove call-sites use offsets and caller-managed lengths (potential for off-by-one if unchecked)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The sink at line 34 copies REE-derived bytes into a TA-local buffer; it does not send TA-private secrets to REE (so unencrypted_output is not applicable). No direct evidence of a bounds overflow at this call-site is visible because serialargs_get_ptr is expected to perform checks; thus we do not mark it vulnerable but flag residual/structural risks.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_MemMove at line 34 writes into a TA-local buffer with no evidence of buffer overflow or REE-facing output at that site; caller-level type/size checks exist though some lower-level checks are not shown.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_info:pkcs11_token.c:360-388",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to sizeof(info)"
    },
    {
      "type": "bounds_check",
      "location": "serialargs_get/serialargs_get_ptr:serializer.c:32",
      "evidence": "serialargs_get only calls TEE_MemMove when serialargs_get_ptr returns success (assumed to imply bounds checks)"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "Initialized from ctrl->memref.buffer and ctrl->memref.size; higher-level calls validate ptypes and sizes before init",
      "evidence": "pkcs11_token.c:387-392"
    },
    {
      "arg": "out (caller buffer for token_id)",
      "why_safe": "Caller provides address of a local uint32_t and passes sizeof(token_id) as size",
      "evidence": "pkcs11_token.c:392"
    }
  ],
  "residual_risks": [
    "Line 366 (TA_InvokeCommandEntryPoint) copies rc into REE-visible buffer via TEE_MemMove; although rc appears public, any future sensitive use could make this an info leak.",
    "serialargs_get_ptr implementation is not shown; if it lacks proper bounds checks, copies like serializer.c:34 could over-read or copy attacker-controlled lengths into TA locals."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Param type and size checks at entry_ck_token_info",
      "serialargs_get returns error if serialargs_get_ptr fails"
    ],
    "negative_indicators": [
      "Missing visible implementation of serialargs_get_ptr and some TEE_MemMove call-sites perform pointer arithmetic with caller-managed lengths"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No line-level vulnerable sink found for TEE_MemMove at line 34 because destination is TA-local and caller-level checks exist; structural risks remain where TA copies data back to REE or where lower-level bounds checks are not visible.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible); destination is shared though info appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "why": "Writes 'len' bytes into buf + *blen using caller-managed lengths; potential for out-of-bounds if caller-supplied lengths are incorrect.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #132: TA_InvokeCommandEntryPoint -> entry_ck_token_mecha_ids -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_mecha_idsserialargs_getTEE_MemMove

実行時間: 110.84秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The copy at line 34 moves data from an REE-originated serial buffer into TA-private memory and occurs only after serialargs_get_ptr succeeded; there is no evidence that secrets are being moved to REE nor a demonstrated bounds violation at this line, so it is not classified as vulnerable. However, the safety depends on serialargs_get_ptr's correctness, so a structural risk remains.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: entry_ck_token_mecha_ids
プロンプト 中間 (entry_ck_token_mecha_ids)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_token_mecha_ids” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [170]:
-- Call #1 at line 170 --
168: break;
169: case PKCS11_CMD_MECHANISM_IDS:
170: >>> rc = entry_ck_token_mecha_ids(ptypes, params);
171: break;
172: case PKCS11_CMD_MECHANISM_INFO:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

439: enum pkcs11_rc entry_ck_token_mecha_ids(uint32_t ptypes, TEE_Param *params)
440: { 441: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 442: TEE_PARAM_TYPE_NONE, 443: TEE_PARAM_TYPE_MEMREF_OUTPUT, 444: TEE_PARAM_TYPE_NONE); 445: TEE_Param *ctrl = params; 446: TEE_Param *out = params + 2; 447: enum pkcs11_rc rc = PKCS11_CKR_OK; 448: struct serialargs ctrlargs = { }; 449: uint32_t token_id = 0; 450: struct ck_token *token = NULL; 451: size_t count = 0; 452: uint32_t *array = NULL; 453: 454: if (ptypes != exp_pt) 455: return PKCS11_CKR_ARGUMENTS_BAD; 456: 457: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 458: 459: rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id)); 460: if (rc) 461: return rc; 462: 463: if (serialargs_remaining_bytes(&ctrlargs)) 464: return PKCS11_CKR_ARGUMENTS_BAD; 465: 466: token = get_token(token_id); 467: if (!token) 468: return PKCS11_CKR_SLOT_ID_INVALID; 469: 470: count = out->memref.size / sizeof(*array); 471: array = tee_malloc_mechanism_list(&count); 472: 473: if (out->memref.size < count * sizeof(*array)) { 474: assert(!array); 475: out->memref.size = count * sizeof(*array); 476: if (out->memref.buffer) 477: return PKCS11_CKR_BUFFER_TOO_SMALL; 478: else 479: return PKCS11_CKR_OK; 480: } 481: 482: if (!array) 483: return PKCS11_CKR_DEVICE_MEMORY; 484: 485: dmsg_print_supported_mechanism(token_id, array, count); 486: 487: out->memref.size = count * sizeof(*array); 488: TEE_MemMove(out->memref.buffer, array, out->memref.size); 489: 490: TEE_Free(array); 491: 492: return rc; 493: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_token_mecha_ids", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_token_mecha_ids", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_token_mecha_ids)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_token_mecha_ids",
    "tainted_vars": [
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "token_id",
      "count",
      "array"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:445-446"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:445-446"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(token_id)) (from ctrl->memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:457-461"
      },
      {
        "lhs": "count",
        "rhs": "out->memref.size / sizeof(*array)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:470-472"
      },
      {
        "lhs": "array",
        "rhs": "tee_malloc_mechanism_list(&count) (size influenced by count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:471"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:454-456",
        "evidence": "ptypes must equal expected exp_pt or function returns PKCS11_CKR_ARGUMENTS_BAD"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:473-479",
        "evidence": "if (out->memref.size < count * sizeof(*array)) adjust out->memref.size and return BUFFER_TOO_SMALL/OK"
      },
      {
        "kind": "sanity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:482-483",
        "evidence": "if (!array) return PKCS11_CKR_DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 170,
      "function": "entry_ck_token_mecha_ids",
      "rule": "other",
      "why": "Call-site binding: callee params pointer aliases caller-provided params (REE-visible) allowing REE-controlled memrefs into the function.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_token_mecha_ids(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 488,
      "function": "entry_ck_token_mecha_ids",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies TA-allocated mechanism list into REE-provided out->memref.buffer; out->memref.size earlier used to derive allocation count (attacker-controlled), risking size/alloc validation issues.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=count*sizeof(*array),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, array, out->memref.size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_mecha_ids at lines [459, 515, 519, 621, 625, 757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 459 --
457: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
458:
459: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
460: if (rc)
461: return rc;
-- Call #2 at line 515 --
513: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
514:
515: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
516: if (rc)
517: return rc;
-- Call #3 at line 519 --
517: return rc;
518:
519: >>> rc = serialargs_get(&ctrlargs, &type, sizeof(uint32_t));
520: if (rc)
521: return rc;
-- Call #4 at line 621 --
619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
620:
621: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
622: if (rc)
623: return rc;
-- Call #5 at line 625 --
623: return rc;
624:
625: >>> rc = serialargs_get(&ctrlargs, &flags, sizeof(flags));
626: if (rc)
627: return rc;
-- Call #6 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #7 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #8 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #9 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #10 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #11 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #12 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #13 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #14 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (data copied from src into caller-provided out)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr returns rc; if non-zero serialargs_get does not perform the copy"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 459,
      "function": "serialargs_get (call-site)",
      "rule": "other",
      "why": "Call-site binding: 'args' parameter aliases ctrlargs built over ctrl->memref.buffer (REE-visible), so callee will read from REE-originated memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 459,
      "function": "serialargs_get (call-site)",
      "rule": "other",
      "why": "Call-site binding: 'out' argument is address of a caller-local TA variable (e.g., &token_id) so callee will write into TA-private memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(token_id),src_sz=unknown,dst_sz=sizeof(token_id)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from args which may reference REE buffer) into out; correctness relies on serialargs_get_ptr's validation of bounds.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dst",
        "rhs": "buf0 / src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "dst",
        "rhs": "data (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Destination 'out' (caller-provided) receives size bytes from src derived from serialargs_get_ptr which reads from REE-originated buffer; relies on upstream validation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'src' parameter aliases memory obtained from args (which may reference REE-visible buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TA-allocated (write target) receiving buf0 bytes then more data; dst is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Second copy into ptr+buf0_sz uses 'src' and 'size' which may originate from serialargs (REE); relies on upstream bounds checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from 'data' into buf + *blen; 'data' may be from REE and len may be attacker-controlled if upstream checks are insufficient.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: 'dst' computed as buf + *blen aliases TA buffer with offset derived from TA state; must ensure offset+len within allocation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove at line 34 copies size bytes from src (derived from serialargs over REE buffer) into out which is a caller-provided TA buffer (TA-private) and serialargs_get only performs the copy when serialargs_get_ptr returned success, providing a bounds-checking gate; no evidence of secret→REE copy here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serial args buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init(&ctrlargs, ... ) @ pkcs11_token.c:457",
        "serialargs_get_ptr(args, &src, size) returns src within args backing buffer @ serializer.c:32",
        "TEE_MemMove(out, src, size) copies src->out @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) at serializer.c:34"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker-controlled REE buffer passed as ctrl->memref.buffer",
        "serialargs_get_ptr incorrectly validates bounds (hypothetical)"
      ],
      "attack_scenario": "If serialargs_get_ptr fails to correctly validate that 'size' bytes are within the REE-provided args buffer, an attacker could cause an over-read or copy of unintended memory into TA memory.",
      "impact": "Possible memory-safety issues (over-read) or corrupted TA state; no direct secret leakage to REE from this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr performs explicit bounds checks on 'size' against remaining args bytes and fail safely if out-of-range; prefer size-checked copy helpers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get only calls TEE_MemMove when serialargs_get_ptr returns success",
        "call-sites typically pass TA-local destinations (e.g., &token_id)"
      ],
      "negative_indicators": [
        "implementation of serialargs_get_ptr not shown; its correctness is assumed but not proven"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 34 moves data from an REE-originated serial buffer into TA-private memory and occurs only after serialargs_get_ptr succeeded; there is no evidence that secrets are being moved to REE nor a demonstrated bounds violation at this line, so it is not classified as vulnerable. However, the safety depends on serialargs_get_ptr's correctness, so a structural risk remains.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The sink copies into TA-private memory and is gated by serialargs_get_ptr which returns an error if the source is invalid; no evidence of secret exfiltration or an unchecked over-write at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32",
      "evidence": "serialargs_get_ptr returns rc; serialargs_get only copies when rc == 0"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:454-456",
      "evidence": "ptypes checked against expected exp_pt before deserialization"
    }
  ],
  "argument_safety": [
    {
      "arg": "out",
      "why_safe": "Typically TA-local destination (e.g., &token_id) provided by callers",
      "evidence": "pkcs11_token.c:459 (rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));)"
    },
    {
      "arg": "src",
      "why_safe": "Derived from serialargs_get_ptr which signals error if out-of-bounds",
      "evidence": "serializer.c:32-34"
    }
  ],
  "residual_risks": [
    "34: safety depends on correctness of serialargs_get_ptr; if that function's bounds checks are flawed an over-read or corrupt copy could occur"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit rc check before copy in serialargs_get",
      "callers use TA-local destinations for 'out' in observed call-sites"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not available for review",
      "some callers compute sizes from REE-provided out->memref.size in other paths (structural risk there)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the available evidence, the line performs a guarded copy into TA-private memory and lacks direct indicators of exploitable weakness at this site; remaining concerns are classified as structural risks dependent on upstream helpers.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 459,
      "function": "entry_ck_token_mecha_ids",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: callee reads from ctrlargs built over REE buffer (ctrl->memref.buffer).",
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "TEE_MemMove copies 'size' bytes from src (derived from REE args) into out; correctness depends on serialargs_get_ptr bounds validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #133: TA_InvokeCommandEntryPoint -> entry_ck_token_mecha_info -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_mecha_infoserialargs_getTEE_MemMove

実行時間: 105.20秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: No memory-safety violation at this TEE_MemMove call: size is fixed and validated by callers/serialargs_get_ptr; thus not classified as vulnerable for overflow or unauthorized disclosure at this line.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: entry_ck_token_mecha_info
プロンプト 中間 (entry_ck_token_mecha_info)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_token_mecha_info” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [173]:
-- Call #1 at line 173 --
171: break;
172: case PKCS11_CMD_MECHANISM_INFO:
173: >>> rc = entry_ck_token_mecha_info(ptypes, params);
174: break;
175:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

495: enum pkcs11_rc entry_ck_token_mecha_info(uint32_t ptypes, TEE_Param *params)
496: { 497: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 498: TEE_PARAM_TYPE_NONE, 499: TEE_PARAM_TYPE_MEMREF_OUTPUT, 500: TEE_PARAM_TYPE_NONE); 501: TEE_Param *ctrl = params; 502: TEE_Param *out = params + 2; 503: enum pkcs11_rc rc = PKCS11_CKR_OK; 504: struct serialargs ctrlargs = { }; 505: uint32_t token_id = 0; 506: uint32_t type = 0; 507: struct ck_token *token = NULL; 508: struct pkcs11_mechanism_info info = { }; 509: 510: if (ptypes != exp_pt || out->memref.size != sizeof(info)) 511: return PKCS11_CKR_ARGUMENTS_BAD; 512: 513: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 514: 515: rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t)); 516: if (rc) 517: return rc; 518: 519: rc = serialargs_get(&ctrlargs, &type, sizeof(uint32_t)); 520: if (rc) 521: return rc; 522: 523: if (serialargs_remaining_bytes(&ctrlargs)) 524: return PKCS11_CKR_ARGUMENTS_BAD; 525: 526: token = get_token(token_id); 527: if (!token) 528: return PKCS11_CKR_SLOT_ID_INVALID; 529: 530: if (!mechanism_is_valid(type)) 531: return PKCS11_CKR_MECHANISM_INVALID; 532: 533: info.flags = mechanism_supported_flags(type); 534: 535: pkcs11_mechanism_supported_key_sizes(type, &info.min_key_size, 536: &info.max_key_size); 537: 538: TEE_MemMove(out->memref.buffer, &info, sizeof(info)); 539: 540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info", 541: token_id, type); 542: 543: return PKCS11_CKR_OK; 544: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_token_mecha_info", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_token_mecha_info", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_token_mecha_info)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_token_mecha_info",
    "tainted_vars": [
      "ptypes",
      "params",
      "ctrl",
      "out",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "out->memref.buffer",
      "out->memref.size",
      "token_id",
      "type",
      "info"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:501-502"
      },
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:501-502"
      },
      {
        "lhs": "ctrlargs (serialargs)",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:513"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(ctrlargs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:515-517"
      },
      {
        "lhs": "type",
        "rhs": "serialargs_get(ctrlargs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:519-521"
      },
      {
        "lhs": "info.*",
        "rhs": "mechanism_supported_flags / pkcs11_mechanism_supported_key_sizes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:533-536"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "params + 2 (caller-provided memref buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:502,538"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:497-501,510-511",
        "evidence": "ptypes must equal expected TEE_PARAM_TYPES and out->memref.size must equal sizeof(info)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:515-524",
        "evidence": "serialargs_get called for token_id and type and serialargs_remaining_bytes checked"
      },
      {
        "kind": "validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:530-531",
        "evidence": "get_token and mechanism_is_valid checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 173,
      "function": "entry_ck_token_mecha_info",
      "rule": "other",
      "why": "Call-site binds callee params pointer to caller-provided params (shared/REE-visible) — alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_token_mecha_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 501,
      "function": "entry_ck_token_mecha_info",
      "rule": "other",
      "why": "Local aliases ctrl and out point into caller params (shared/REE-visible buffers)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=alias,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_Param *ctrl = params; TEE_Param *out = params + 2;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "entry_ck_token_mecha_info",
      "rule": "other",
      "why": "Copies TA-constructed info into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_mecha_info at lines [515, 519, 621, 625, 757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 515 --
513: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
514:
515: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
516: if (rc)
517: return rc;
-- Call #2 at line 519 --
517: return rc;
518:
519: >>> rc = serialargs_get(&ctrlargs, &type, sizeof(uint32_t));
520: if (rc)
521: return rc;
-- Call #3 at line 621 --
619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
620:
621: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
622: if (rc)
623: return rc;
-- Call #4 at line 625 --
623: return rc;
624:
625: >>> rc = serialargs_get(&ctrlargs, &flags, sizeof(flags));
626: if (rc)
627: return rc;
-- Call #5 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #6 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #7 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #8 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #9 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #10 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #11 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #12 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #13 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "return rc",
        "rhs": "serialargs_get_ptr result",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-36"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "serialargs_get relies on serialargs_get_ptr for pointer/size validation; no checks in this wrapper"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 515,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site passes ctrlargs initialized from caller memref.buffer (shared/REE-visible) into serialargs_get as args — alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=alias,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 515,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binds callee out pointer to caller stack variable (destination is TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies bytes from src (from args->buffer, likely REE-visible) into out via TEE_MemMove without local checks",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "first argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "src",
        "rhs": "second argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dest",
        "rhs": "first argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "src",
        "rhs": "second argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "dest",
        "rhs": "first argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "src",
        "rhs": "second argument of TEE_MemMove call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller relies on serialargs_get_ptr to validate src/size; TEE_MemMove wrapper performs no additional checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to caller 'out' (TA-private) at call site — alias of callee dest to local TA storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter to pointer returned by serialargs_get_ptr (likely from args->buffer, REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to ptr (allocated/TA-private) for concatenation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter to buf0 (origin depends on caller; could be REE-visible or TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to ptr + buf0_sz (TA-private) for appending",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter to src (provided by caller code path; origin not resolved here)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to buf + *blen (buffer in caller; likely REE-visible or TA-private depending on allocation)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter to data (origin from caller; may be REE-visible), then copying into buf -- potential shared-memory transfer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies 'size' bytes from src (obtained via serialargs_get_ptr from ctrl->memref.buffer) into caller-provided out where callers request fixed small sizes (e.g., sizeof(uint32_t)); upstream checks (serialargs_get_ptr/serialargs_remaining_bytes and param size checks) constrain length.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params.memref.buffer (ctrl->memref.buffer)",
      "propagation_path": [
        "ctrl <- params @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:501-502",
        "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:513",
        "serialargs_get_ptr(&ctrlargs, &src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove into TA-private destination 'out' (e.g., &token_id)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malicious REE supplies ctrl->memref.buffer with crafted bytes",
        "Callers request sizes that match destination storage (e.g., sizeof(uint32_t))"
      ],
      "attack_scenario": "An attacker-controlled REE buffer supplies malformed values read into TA-local variables; because inputs are validated to fixed lengths, direct overflow is not expected.",
      "impact": "Potential logic manipulation via crafted fields (e.g., token_id/type) but not memory corruption at this call site."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr enforces and documents strict bounds; consider double-checking size against destination sizeof at wrapper call sites."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "explicit param-type and out->memref.size check in caller (pkcs11_token.c:497-511)",
        "serialargs_remaining_bytes check after parsing (pkcs11_token.c:523-524)",
        "requested sizes at call sites are fixed (e.g., sizeof(uint32_t))"
      ],
      "negative_indicators": [
        "serialargs_get is a thin wrapper that relies on serialargs_get_ptr for validation (no local checks)",
        "serialargs_get_ptr implementation not provided here (validation assumed)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "No memory-safety violation at this TEE_MemMove call: size is fixed and validated by callers/serialargs_get_ptr; thus not classified as vulnerable for overflow or unauthorized disclosure at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Upstream type/size checks and limited fixed-size copies prevent overflow or secret leakage at this TEE_MemMove call.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_mecha_info:497-511",
      "evidence": "ptypes must equal expected TEE_PARAM_TYPES and out->memref.size must equal sizeof(info)"
    },
    {
      "type": "bounds_check",
      "location": "pkcs11_token.c:515-524",
      "evidence": "serialargs_get invoked for fixed sizes and serialargs_remaining_bytes checked"
    },
    {
      "type": "bounds_check",
      "location": "serializer.c:32",
      "evidence": "serialargs_get_ptr called to obtain src pointer for size"
    }
  ],
  "argument_safety": [
    {
      "arg": "src (serialargs_get_ptr -> src)",
      "why_safe": "Validation performed by serialargs_get_ptr and caller ensures src length covers requested size",
      "evidence": "serializer.c:32; pkcs11_token.c:513-521,523-524"
    },
    {
      "arg": "out (destination pointer -> &token_id etc.)",
      "why_safe": "Callers supply addresses of appropriately sized stack/local variables and request matching sizes (e.g., sizeof(uint32_t))",
      "evidence": "pkcs11_token.c:515,519"
    }
  ],
  "residual_risks": [
    "Line 366 in entry.c copies rc into caller buffer (TEE_MemMove) — destination is REE-visible; structural risk noted earlier",
    "Line 538 in pkcs11_token.c copies TA-constructed info to REE-visible out->memref.buffer — structural risk noted earlier"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Caller-side param-type and size validation",
      "Fixed small requested sizes at call sites"
    ],
    "negative_indicators": [
      "serialargs_get wrapper itself lacks checks and depends on serialargs_get_ptr implementation",
      "Not all call paths to TEE_MemMove in serializer.c resolved here; some origins unknown"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given caller validations (param types and sizes) and fixed-size requests, the TEE_MemMove at line 34 does not present a memory-safety or unencrypted-output vulnerability; remaining concerns are structural risks elsewhere where TA data is copied back to REE.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) at end of command handling.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "entry_ck_token_mecha_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-constructed mechanism info into caller-provided out->memref.buffer (REE-visible).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies bytes from src (from args->buffer, likely REE-visible) into out via TEE_MemMove; relies on serialargs_get_ptr for validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #134: TA_InvokeCommandEntryPoint -> entry_ck_open_session -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_open_sessionserialargs_getTEE_MemMove

実行時間: 97.95秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The call at line 34 performs REE->TA copy into TA-private storage with caller-side type/size checks (serialargs_get_ptr and serialargs_remaining_bytes); no evidence of oversize write to REE or sensitive TA secret leaking to REE at this call-site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_open_session at lines [621, 625, 757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 621 --
619: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
620:
621: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));
622: if (rc)
623: return rc;
-- Call #2 at line 625 --
623: return rc;
624:
625: >>> rc = serialargs_get(&ctrlargs, &flags, sizeof(flags));
626: if (rc)
627: return rc;
-- Call #3 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #4 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #5 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #6 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #7 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #8 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #9 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #10 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #11 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) writes src into out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "The args parameter aliases a serialargs initialized from caller-provided memref buffer (REE-visible), so serialreads originate from shared memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copy from src (derived from REE-visible buffer) into caller-provided out pointer (callee writes into caller stack/vars) via TEE_MemMove observed at this call-site.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "dst (first arg)",
        "rhs": "caller-provided pointer passed as first argument at call-sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "src (second arg)",
        "rhs": "pointer passed as second argument (may originate from REE-visible memref or TA buffers)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "size (third arg)",
        "rhs": "size parameter passed at call-sites (symbolic 'size', buf0_sz, len, etc.)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'out' at this call-site is a TA-local variable pointer (callee writes into TA-private storage) while source originates from serialargs_get_ptr (derived from caller-provided REE buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'src' at this call-site is bound from serialargs_get_ptr which reads from an args-initialized buffer (caller-provided memref).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "First call at this site writes buf0 into allocated ptr; buf0 origin unclear (could be TA or REE), binding observed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Second call at this site copies src into ptr+buf0_sz; origin of src unclear at call-site so binding is recorded as unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call copies data into buf + *blen; destination is TA buffer (buf) while source 'data' origin is unclear (could be REE or TA).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'size' bytes from src (derived from caller memref) into callee-local out (TA-private); available caller-side checks (serialargs_get_ptr/remaining bytes) bound the read.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "The call at line 34 performs REE->TA copy into TA-private storage with caller-side type/size checks (serialargs_get_ptr and serialargs_remaining_bytes); no evidence of oversize write to REE or sensitive TA secret leaking to REE at this call-site.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_open_session:615-617",
      "evidence": "ptypes compared to expected TEE_PARAM_TYPES and out->memref.size checked against sizeof(session->handle)"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_open_session:621-630",
      "evidence": "serialargs_get used and serialargs_remaining_bytes checked after reads"
    }
  ],
  "argument_safety": [
    {
      "arg": "args / ctrl->memref",
      "why_safe": "serialargs_get_ptr reads are validated via serialargs APIs before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:619-630"
    },
    {
      "arg": "out (callee local)",
      "why_safe": "out points to a TA-local variable passed by caller; destination is TA-private not REE-visible",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:621 and serializer.c:34"
    }
  ],
  "residual_risks": [
    "line 366: TEE_MemMove into params[0].memref.buffer (REE-visible) copies TA rc to REE — separate sink where information exposure should be evaluated",
    "calls where src or dst origin is unknown (serializer.c:66,67,188) — origins unclear so copy direction/region uncertain"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_get_ptr and serialargs_remaining_bytes checks in caller",
      "out is TA-local destination in this call"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here; exact bounds enforced are assumed from caller checks",
      "some other TEE_MemMove call-sites have unclear src/dst origins"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 34 performs a bounded read from a caller-provided serial buffer into TA-local storage; caller-side serialargs checks and param type/size validation mitigate over-read/overflow and there is no evidence of secret being exfiltrated to REE at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=size"
        ]
      },
      "why": "serialargs_get copies from src derived from caller memref into out; src origin is REE-visible buffer initialized by caller.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "why": "Copies buf0 into allocated ptr; buf0 origin (REE vs TA) is unclear at call-site.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "why": "Copies src into ptr+buf0_sz; src origin unclear at call-site.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "some_func",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "why": "Copies data into buf + *blen; destination is TA buffer while source origin is unclear.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #135: TA_InvokeCommandEntryPoint -> entry_ck_close_all_sessions -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_close_all_sessionsserialargs_getTEE_MemMove

実行時間: 113.32秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Memory-safety concerns are mitigated by the preceding serialargs_get_ptr call and small fixed copy length; destination is TA-private so no information disclosure to REE.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: entry_ck_close_all_sessions
プロンプト 中間 (entry_ck_close_all_sessions)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_close_all_sessions” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [183]:
-- Call #1 at line 183 --
181: break;
182: case PKCS11_CMD_CLOSE_ALL_SESSIONS:
183: >>> rc = entry_ck_close_all_sessions(client, ptypes, params);
184: break;
185: case PKCS11_CMD_SESSION_INFO:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

737: enum pkcs11_rc entry_ck_close_all_sessions(struct pkcs11_client *client,
738: uint32_t ptypes, TEE_Param *params)
739: { 740: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 741: TEE_PARAM_TYPE_NONE, 742: TEE_PARAM_TYPE_NONE, 743: TEE_PARAM_TYPE_NONE); 744: TEE_Param *ctrl = params; 745: enum pkcs11_rc rc = PKCS11_CKR_OK; 746: struct serialargs ctrlargs = { }; 747: uint32_t token_id = 0; 748: struct ck_token *token = NULL; 749: struct pkcs11_session *session = NULL; 750: struct pkcs11_session *next = NULL; 751: 752: if (!client || ptypes != exp_pt) 753: return PKCS11_CKR_ARGUMENTS_BAD; 754: 755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 756: 757: rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t)); 758: if (rc) 759: return rc; 760: 761: if (serialargs_remaining_bytes(&ctrlargs)) 762: return PKCS11_CKR_ARGUMENTS_BAD; 763: 764: token = get_token(token_id); 765: if (!token) 766: return PKCS11_CKR_SLOT_ID_INVALID; 767: 768: DMSG("Close all sessions for PKCS11 token %"PRIu32, token_id); 769: 770: TAILQ_FOREACH_SAFE(session, &client->session_list, link, next) 771: if (session->token == token) 772: close_ck_session(session); 773: 774: return PKCS11_CKR_OK; 775: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_close_all_sessions", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_close_all_sessions", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_close_all_sessions)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_close_all_sessions",
    "tainted_vars": [
      "client",
      "ptypes",
      "params",
      "ctrl",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "token_id"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:744-745"
      },
      {
        "lhs": "ctrl->memref.buffer, ctrl->memref.size",
        "rhs": "params[0].memref.buffer, params[0].memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:755"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t)) (populated from ctrlargs which wraps ctrl->memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:757-759"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:740-744,752-753",
        "evidence": "ptypes compared against expected TEE_PARAM_TYPES (exp_pt) and returns on mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:757-763",
        "evidence": "serialargs_get and serialargs_remaining_bytes used to ensure token_id consumed exactly"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 183,
      "function": "entry_ck_close_all_sessions",
      "rule": "other",
      "why": "Binding caller-provided 'client' (derived from tee_session) into callee parameter; origin region unclear (could be REE-derived session->client).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_close_all_sessions(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 183,
      "function": "entry_ck_close_all_sessions",
      "rule": "other",
      "why": "Binding caller-provided 'ptypes' (REE-origin) into callee parameter; value controls param interpretation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=4,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = entry_ck_close_all_sessions(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 183,
      "function": "entry_ck_close_all_sessions",
      "rule": "other",
      "why": "Binding caller-provided 'params' (shared memref) into callee; alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_close_all_sessions(client, ptypes, params);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_close_all_sessions at lines [757, 840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 757 --
755: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
756:
757: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
758: if (rc)
759: return rc;
-- Call #2 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #3 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #4 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #5 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #6 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #7 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #8 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #9 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (contents copied from src into out)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr may perform bounds checks but not visible here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 757,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Alias: callee 'args' parameter binds to caller's ctrlargs which wraps ctrl->memref.buffer (shared REE-visible buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 757,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Alias: callee 'out' parameter binds to caller-local &token_id (TEE-private) receiving data from shared src.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 757,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding of 'size' argument from caller is a REE-influenced/public length (sizeof(uint32_t) here) controlling copy length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:public",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "first argument of TEE_MemMove (destination pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "src",
        "rhs": "second argument of TEE_MemMove (source pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "size",
        "rhs": "third argument of TEE_MemMove (copy length)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "unknown",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "serialargs_get_ptr called before copy may perform bounds checks but not visible here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from src (obtained via serialargs_get_ptr, likely wrapping REE-provided buffer) into out; destination origin depends on caller (&token_id in callers) so aliasing between shared and private exists.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 into ptr and then src into ptr+buf0_sz; source buffers may be REE-origin and destination ptr is allocator output — potential aliasing and size-controlled arithmetic from callers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz or size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies src into ptr+buf0_sz where ptr arithmetic uses buf0_sz (caller-controlled); index/offset arithmetic driven by sizes from callers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data (likely REE-provided) into buf + *blen; destination offset uses *blen (caller-managed) which can lead to out-of-bounds if not checked here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Source originates from REE-visible serialargs buffer but copy length is caller-supplied small fixed sizeof(uint32_t) and serialargs_get_ptr (invoked immediately prior) is expected to perform bounds checks; destination is a TA-private local (&token_id), so no unencrypted REE output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "ctrl->memref.buffer (REE-provided)",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init &ctrlargs @ pkcs11_token.c:755",
        "ctrlargs -> serialargs_get_ptr sets src @ serializer.c:32",
        "TEE_MemMove(out, src, size) copies into out (&token_id) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) at serializer.c:34"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed/malicious REE-provided ctrl->memref.buffer that is shorter than requested size and serialargs_get_ptr lacks proper bounds checks"
      ],
      "attack_scenario": "If serialargs_get_ptr fails to verify remaining bytes, an over-read or out-of-bounds read could occur; however caller requests a fixed small size (uint32_t) and callers subsequently validate remaining bytes.",
      "impact": "Possible memory-safety issue (over-read) or crash if bounds not checked; no secret leakage to REE from this copy since destination is TA-private."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr explicitly validates remaining bytes >= size and return error otherwise; document and assert checks."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr is called immediately before the copy (likely performs bounds checking)",
        "size is fixed sizeof(uint32_t) at call sites"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not visible here so exact checks are uncertain"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety concerns are mitigated by the preceding serialargs_get_ptr call and small fixed copy length; destination is TA-private so no information disclosure to REE.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Pre-copy pointer acquisition (serialargs_get_ptr) and small fixed copy length reduce risk; destination is TA-private, so no unencrypted REE output.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32",
      "evidence": "serialargs_get_ptr called before TEE_MemMove (rc checked) suggesting bounds verification"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:757",
      "evidence": "Call-site uses sizeof(uint32_t) for requested size"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (ctrlargs)",
      "why_safe": "Initialized from params[0].memref and used with serialargs_get_ptr/serialargs_remaining_bytes checks",
      "evidence": "pkcs11_token.c:755-763"
    },
    {
      "arg": "out (&token_id)",
      "why_safe": "Destination is a TA-private local variable",
      "evidence": "pkcs11_token.c:747-757"
    },
    {
      "arg": "size",
      "why_safe": "Caller passes fixed sizeof(uint32_t) at call-site",
      "evidence": "pkcs11_token.c:757"
    }
  ],
  "residual_risks": [
    "34:serialargs_get_ptr implementation not shown; if it lacks proper bounds checks an over-read/crash is possible",
    "366:TEE_MemMove in entry.c copies rc into REE-visible buffer (structural risk previously noted)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Immediate prior call to serialargs_get_ptr and rc check",
      "Fixed small copy length at callers"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not inspected; some bounds checks assumed but not proven"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given available evidence, the TEE_MemMove at serializer.c:34 copies a small fixed amount from a source obtained via serialargs_get_ptr into a TA-private destination; serialargs_get_ptr likely enforces bounds, so this line is classified safe. Remaining uncertainties about serialargs_get_ptr are reported as residual risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided REE-visible memref.buffer; destination is shared/REE-visible though data appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz or size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Copies with ptr arithmetic and caller-controlled sizes; potential aliasing/size arithmetic risks.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "some_fn",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "why": "Copies data into buf + *blen where *blen is caller-managed; if not checked this can overflow destination.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #136: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_initializeserialargs_getTEE_MemMove

実行時間: 111.02秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Although src is derived from caller-controlled memref, the specific call-sites use small fixed sizes and higher-level type/length checks exist, so this particular TEE_MemMove invocation is not a vulnerability; remaining structural risks are noted.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: entry_ck_token_initialize
プロンプト 中間 (entry_ck_token_initialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ck_token_initialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [190]:
-- Call #1 at line 190 --
188:
189: case PKCS11_CMD_INIT_TOKEN:
190: >>> rc = entry_ck_token_initialize(ptypes, params);
191: break;
192: case PKCS11_CMD_INIT_PIN:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

817: enum pkcs11_rc entry_ck_token_initialize(uint32_t ptypes, TEE_Param *params)
818: { 819: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT, 820: TEE_PARAM_TYPE_NONE, 821: TEE_PARAM_TYPE_NONE, 822: TEE_PARAM_TYPE_NONE); 823: char label[PKCS11_TOKEN_LABEL_SIZE] = { 0 }; 824: struct pkcs11_client *client = NULL; 825: struct pkcs11_session *sess = NULL; 826: enum pkcs11_rc rc = PKCS11_CKR_OK; 827: struct serialargs ctrlargs = { }; 828: struct ck_token *token = NULL; 829: TEE_Param *ctrl = params; 830: uint32_t token_id = 0; 831: uint32_t pin_size = 0; 832: void *pin = NULL; 833: struct pkcs11_object *obj = NULL; 834: 835: if (ptypes != exp_pt) 836: return PKCS11_CKR_ARGUMENTS_BAD; 837: 838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); 839: 840: rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t)); 841: if (rc) 842: return rc; 843: 844: rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t)); 845: if (rc) 846: return rc; 847: 848: rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE); 849: if (rc) 850: return rc; 851: 852: rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size); 853: if (rc) 854: return rc; 855: 856: if (serialargs_remaining_bytes(&ctrlargs)) 857: return PKCS11_CKR_ARGUMENTS_BAD; 858: 859: token = get_token(token_id); 860: if (!token) 861: return PKCS11_CKR_SLOT_ID_INVALID; 862: 863: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED) { 864: IMSG("Token %"PRIu32": SO PIN locked", token_id); 865: return PKCS11_CKR_PIN_LOCKED; 866: } 867: 868: 869: TAILQ_FOREACH(client, &pkcs11_client_list, link) 870: TAILQ_FOREACH(sess, &client->session_list, link) 871: if (sess->token == token) 872: return PKCS11_CKR_SESSION_EXISTS; 873: 874: 875: if (token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED) { 876: unsigned int pin_count = 0; 877: 878: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 879: (token->db_main->flags & 880: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH)) { 881: 882: rc = verify_identity_auth(token, PKCS11_CKU_SO); 883: if (rc) 884: return rc; 885: 886: goto inited; 887: } 888: 889: 890: rc = verify_pin(PKCS11_CKU_SO, pin, pin_size, 891: token->db_main->so_pin_salt, 892: token->db_main->so_pin_hash); 893: if (!rc) 894: goto inited; 895: 896: if (rc != PKCS11_CKR_PIN_INCORRECT) 897: return rc; 898: 899: token->db_main->flags |= PKCS11_CKFT_SO_PIN_COUNT_LOW; 900: token->db_main->so_pin_count++; 901: 902: pin_count = token->db_main->so_pin_count; 903: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX - 1) 904: token->db_main->flags |= PKCS11_CKFT_SO_PIN_FINAL_TRY; 905: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX) 906: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED; 907: 908: update_persistent_db(token); 909: 910: return PKCS11_CKR_PIN_INCORRECT; 911: } 912: 913: 914: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && !pin) { 915: rc = setup_so_identity_auth_from_client(token); 916: if (rc) 917: return rc; 918: } else { 919: 924: if (pin_size < PKCS11_TOKEN_PIN_SIZE_MIN || 925: pin_size > PKCS11_TOKEN_PIN_SIZE_MAX) 926: return PKCS11_CKR_ARGUMENTS_BAD; 927: 928: rc = hash_pin(PKCS11_CKU_SO, pin, pin_size, 929: &token->db_main->so_pin_salt, 930: token->db_main->so_pin_hash); 931: if (rc) 932: return rc; 933: } 934: 935: inited: 936: 937: token->db_main->flags &= ~(PKCS11_CKFT_SO_PIN_COUNT_LOW | 938: PKCS11_CKFT_SO_PIN_FINAL_TRY | 939: PKCS11_CKFT_SO_PIN_LOCKED | 940: PKCS11_CKFT_SO_PIN_TO_BE_CHANGED); 941: token->db_main->so_pin_count = 0; 942: 943: TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE); 944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED; 945: 946: token->db_main->user_pin_salt = 0; 947: token->db_main->flags &= ~(PKCS11_CKFT_USER_PIN_INITIALIZED | 948: PKCS11_CKFT_USER_PIN_COUNT_LOW | 949: PKCS11_CKFT_USER_PIN_FINAL_TRY | 950: PKCS11_CKFT_USER_PIN_LOCKED | 951: PKCS11_CKFT_USER_PIN_TO_BE_CHANGED); 952: 953: update_persistent_db(token); 954: 955: 956: while (!LIST_EMPTY(&token->object_list)) { 957: obj = LIST_FIRST(&token->object_list); 958: 959: 960: if (unregister_persistent_object(token, obj->uuid) && 961: unregister_persistent_object(token, obj->uuid)) 962: TEE_Panic(0); 963: 964: cleanup_persistent_object(obj, token); 965: } 966: 967: IMSG("PKCS11 token %"PRIu32": initialized", token_id); 968: 969: return PKCS11_CKR_OK; 970: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "entry_ck_token_initialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"entry_ck_token_initialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (entry_ck_token_initialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ck_token_initialize",
    "tainted_vars": [
      "ptypes",
      "params",
      "ctrl->memref.buffer",
      "ctrl->memref.size",
      "ctrlargs",
      "token_id",
      "pin_size",
      "label",
      "pin"
    ],
    "propagation": [
      {
        "lhs": "ctrl",
        "rhs": "params",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:829"
      },
      {
        "lhs": "ctrlargs (buffer, size)",
        "rhs": "ctrl->memref.buffer, ctrl->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:838"
      },
      {
        "lhs": "token_id",
        "rhs": "serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t)) (from ctrl buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:840-842"
      },
      {
        "lhs": "pin_size",
        "rhs": "serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t)) (from ctrl buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:844-846"
      },
      {
        "lhs": "label",
        "rhs": "serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE) (from ctrl buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:848-850"
      },
      {
        "lhs": "pin",
        "rhs": "serialargs_get_ptr(&ctrlargs, &pin, pin_size) (pointer into ctrl buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:852-854"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:819-822,835-836",
        "evidence": "exp_pt compared against ptypes; returns error if mismatch"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:856-857",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> error if leftover"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:924-926",
        "evidence": "pin_size compared against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 190,
      "function": "entry_ck_token_initialize",
      "rule": "other",
      "why": "Call-site binding: params (caller-provided memref buffer) aliased into callee parameter (ctrl) — shared REE buffer passed to TA.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = entry_ck_token_initialize(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "rule": "weak_input_validation",
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer (pin) using pin_size from REE without further containment proof.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    }
  ]
}

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_initialize at lines [840, 844, 848, 1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 840 --
838: serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size);
839:
840: >>> rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));
841: if (rc)
842: return rc;
-- Call #2 at line 844 --
842: return rc;
843:
844: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
845: if (rc)
846: return rc;
-- Call #3 at line 848 --
846: return rc;
847:
848: >>> rc = serialargs_get(&ctrlargs, &label, PKCS11_TOKEN_LABEL_SIZE);
849: if (rc)
850: return rc;
-- Call #4 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #5 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #6 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #7 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #8 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "args->buf",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (data copied from src into out)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 840,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: args (ctrlargs) originates from caller memref buffer (shared REE-visible) passed into serialargs_get.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (pointer derived from caller-controlled args) into out without local bounds checks here; size originates from caller in many call-sites.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (copied len bytes)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from caller-controlled serialargs buffer) into out (TA memory) without local checks here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0_sz bytes into allocated ptr from buf0; operands appear internal (likely TA-private) but origin not fully proven here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes into ptr+offset from src; src provenance may be caller-controlled and size is externally supplied at call-sites.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Appends 'len' bytes from data (possibly caller-controlled) into buf + *blen without local bounds proof here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "This call copies 'size' bytes from src (pointer into caller memref) into TA-local 'out'; here size is a small constant (e.g., sizeof(uint32_t)) at call-sites and prior param-type checks ensure ptypes/exp_pt match.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer (caller/REE)",
      "propagation_path": [
        "ctrl <- params (pkcs11_token.c:829)",
        "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size) (pkcs11_token.c:838)",
        "serialargs_get_ptr(&ctrlargs, &src, size) -> src points into ctrl buffer (serializer.c:32)",
        "TEE_MemMove(out, src, size) (serializer.c:34)"
      ],
      "sink": "TEE_MemMove(out, src, size) (serializer.c:34)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious/incorrectly-formed REE-provided memref data",
        "caller supplies a large size inconsistent with remaining buffer"
      ],
      "attack_scenario": "If size were attacker-controlled and no upstream checks existed, attacker could cause over-read or unexpected values to be copied into TA memory; in practice here size is constant at call-sites and ptypes check is enforced.",
      "impact": "Potential memory-safety or incorrect TA state if bounds checks absent; not applicable for this specific line given evidence."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32-34",
        "recommendation": "Ensure serialargs_get_ptr enforces remaining-buffer >= size and fail early; consider explicit checks at serialargs_get call-sites."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ptype/type validation at entry_ck_token_initialize (pkcs11_token.c:819-836)",
        "call-sites pass fixed small sizes (e.g., sizeof(uint32_t))",
        "serialargs_remaining_bytes checked after reads in caller (pkcs11_token.c:856-857)"
      ],
      "negative_indicators": [
        "serialargs_get delegates pointer retrieval to serialargs_get_ptr; its implementation not shown here",
        "serialargs_get itself does TEE_MemMove without an inline check"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Although src is derived from caller-controlled memref, the specific call-sites use small fixed sizes and higher-level type/length checks exist, so this particular TEE_MemMove invocation is not a vulnerability; remaining structural risks are noted.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Call copies a fixed small size from REE buffer into TA-local storage with prior param-type checks and post-read remaining-bytes checks at the caller, preventing exploitation at this site.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_initialize:819-836",
      "evidence": "exp_pt compared against ptypes; returns error if mismatch"
    },
    {
      "type": "bounds_check",
      "location": "pkcs11_token.c:856-857",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> error if leftover"
    },
    {
      "type": "range_check",
      "location": "pkcs11_token.c:924-926",
      "evidence": "pin_size compared against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    }
  ],
  "argument_safety": [
    {
      "arg": "params (params[0].memref.buffer)",
      "why_safe": "Caller buffer is validated via ptypes/exp_pt and serialargs parsing enforces remaining-bytes in caller after reads",
      "evidence": "pkcs11_token.c:819-838,856-857"
    },
    {
      "arg": "size (argument to serialargs_get)",
      "why_safe": "Call-sites pass fixed compile-time sizes like sizeof(uint32_t) or defined label sizes",
      "evidence": "pkcs11_token.c:840,844,848"
    }
  ],
  "residual_risks": [
    "serializer.c:34 could be risky if serialargs_get_ptr lacks robust bounds checks (implementation not shown); recommend auditing serialargs_get_ptr."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed small sizes at call-sites",
      "ptype/type checks and remaining-bytes checks in caller"
    ],
    "negative_indicators": [
      "serialargs_get performs TEE_MemMove without its own explicit check",
      "serialargs_get_ptr implementation not present for verification"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given upstream type/size checks and fixed-size call-sites, the TEE_MemMove at line 34 does not present a vulnerability; however, serializer_get_ptr should be audited to ensure bounds enforcement.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 190,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "why": "Alias of shared buffer (params) passed into callee; caller-provided memref is used as serialargs source.",
      "code_excerpt": "rc = entry_ck_token_initialize(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer (pin) using pin_size from REE without further containment proof.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from src (pointer derived from caller-controlled args) into out without local checks here; relies on serialargs_get_ptr correctness.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=buf0_sz"
        ]
      },
      "why": "Internal copy into allocated buffer; provenance not fully proven here.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes into ptr+offset from src; src provenance may be caller-controlled at call-sites.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "why": "Appends 'len' bytes from data (possibly caller-controlled) into buf + *blen without local bounds proof here.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #137: TA_InvokeCommandEntryPoint -> entry_ck_init_pin -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_init_pinserialargs_getTEE_MemMove

実行時間: 94.06秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The copy at line 34 uses a fixed small size and is gated by serialargs_get_ptr success, so no direct memory-safety or sensitive-data-to-REE issue at this line; residual structural risks remain in the chain.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_init_pin at lines [1110, 1273, 1277, 1420, 1424]:
-- Call #1 at line 1110 --
1108: return rc;
1109:
1110: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1111: if (rc)
1112: return rc;
-- Call #2 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #3 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #4 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #5 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "evidence": "serialargs_get_ptr returns non-zero on failure; serialargs_get only calls TEE_MemMove if serialargs_get_ptr returned 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "caller-origin args may reference REE-provided buffer (ctrl->memref.buffer); binding of args records alias of shared/REE buffer into function.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 27,
      "function": "serialargs_get",
      "rule": "other",
      "why": "out parameter (caller-provided address) receives bytes copied from src via TEE_MemMove; binding records that out is TA-private (stack) while data may originate from REE.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "other",
      "why": "serialargs_get relies on serialargs_get_ptr to provide a src pointer; if serialargs_get_ptr returns a pointer into REE-shared memory, subsequent copy is from shared memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "*blen"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "src (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "ptr",
        "rhs": "buf0 (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz",
        "rhs": "src (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data (copied via TEE_MemMove)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove calls have no local bounds validation here; caller is expected to ensure sizes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from src (which may originate from REE memref) into out; binds callee args to a caller-provided buffer origin.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 into ptr; buf0 likely originates from caller-provided data, so record alias/binding.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies src into ptr+buf0_sz; src may be REE-origin and offset arithmetic writes into TA memory, record binding and offset usage.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data (likely caller-supplied) into buf+*blen; tainted length/offset used in destination pointer arithmetic recorded as structural risk.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies a fixed sizeof(uint32_t) from src to out only after serialargs_get_ptr returned success; caller passed a constant size, and serialargs_get_ptr gate acts as a bounds/availability check.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided memref buffer (REE-visible)",
      "propagation_path": [
        "params[0]/ctrl->memref.buffer -> serialargs_init/ctrlargs @ pkcs11_token.c:1104",
        "serialargs_get_ptr -> src @ serializer.c:32",
        "TEE_MemMove(out, src, size) @ serializer.c:34"
      ],
      "sink": "TEE_MemMove copying sizeof(uint32_t) into TA stack variable"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious REE provides malformed memref buffer",
        "serialargs_get_ptr erroneously returns success despite insufficient src size"
      ],
      "attack_scenario": "If serialargs_get_ptr erroneously validates, attacker-controlled buffer could supply incorrect integer, but the copy size here is fixed and small.",
      "impact": "Potential incorrect values read into TA variables (logic errors), but no direct buffer overflow at this call site."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serializer.c:32",
        "recommendation": "Ensure serialargs_get_ptr robustly validates that src has at least 'size' bytes and returns error otherwise; consider explicit size assertions at call-site."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get only calls TEE_MemMove when serialargs_get_ptr returned success",
        "caller passed constant sizeof(uint32_t) as size"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not inspected here; if it is faulty, copy could read invalid memory"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 34 uses a fixed small size and is gated by serialargs_get_ptr success, so no direct memory-safety or sensitive-data-to-REE issue at this line; residual structural risks remain in the chain.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A downstream copy of a fixed sizeof(uint32_t) is guarded by serialargs_get_ptr success and the caller used a constant size; no evidence of unsafe bounds at this call.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32",
      "evidence": "serialargs_get_ptr returns non-zero on failure; TEE_MemMove only executed when rc == 0"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1101-1102",
      "evidence": "ptypes compared to expected exp_pt and function returns on mismatch"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "constant sizeof(uint32_t) passed by caller",
      "evidence": "pkcs11_token.c:1110 -> serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t))"
    },
    {
      "arg": "src",
      "why_safe": "serialargs_get_ptr must validate and return error if insufficient data",
      "evidence": "serializer.c:32-34"
    }
  ],
  "residual_risks": [
    "line 366: copying rc into REE-visible params[0].memref.buffer (TA->REE) is a structural data-flow risk though rc is public",
    "pin data (credential) originates from REE and is later passed to set_pin; ensure handling of secret credential bytes is appropriate"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit check of serialargs_get_ptr return before TEE_MemMove",
      "fixed small copy size"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not inspected; could be flawed",
      "upstream buffers are REE-provided and tainted"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety and sanitizer evidence (serialargs_get_ptr gating and caller-provided constant size) outweigh speculative risks; thus no vulnerability at this sink line, but structural issues elsewhere remain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided REE-visible buffer; destination is shared/REE-visible which is a data-leak channel though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "PIN buffer (credential) obtained from REE via serialargs and passed to set_pin; sensitive data flows into TA handling and must be protected.",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Copies from a src pointer supplied by serialargs_get_ptr into caller-provided out; relies on serialargs_get_ptr validation.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serializer.c",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "TEE_MemMove uses destination pointer with tainted offset buf + *blen and tainted length len; potential offset/size arithmetic risk if callers don't validate.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #138: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_set_pinserialargs_getTEE_MemMove

実行時間: 78.28秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Given call-sites pass a fixed small size and serialargs_get_ptr is called before TEE_MemMove, the specific sink invocation at line 34 is not vulnerable. However, upstream validation correctness is crucial; if serialargs_get_ptr were faulty the copy could be unsafe.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_set_pin at lines [1273, 1277, 1420, 1424]:
-- Call #1 at line 1273 --
1271: return rc;
1272:
1273: >>> rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));
1274: if (rc)
1275: return rc;
-- Call #2 at line 1277 --
1275: return rc;
1276:
1277: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1278: if (rc)
1279: return rc;
-- Call #3 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #4 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src",
      "args->buf (underlying buffer)"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "src (then copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "out (contents)",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1273,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee param 'args' aliases serialargs state initialized from REE-provided memref buffer (shared).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1273,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee param 'out' is a pointer to TA-private storage (&old_pin_size/&pin_size), bound at call site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &old_pin_size, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src derived from REE-provided args into out without additional semantic validation of 'size' vs remaining buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "buf",
      "args->buf"
    ],
    "propagation": [
      {
        "lhs": "destination (out/ptr/buf + *blen)",
        "rhs": "caller-provided pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "source (src/buf0/src/data)",
        "rhs": "buffers derived from REE-provided serialargs or earlier buf variables",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "copied contents",
        "rhs": "TEE_MemMove(... , ..., size/len/buf0_sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "caller uses serialargs_get_ptr to obtain src; validity depends on serialargs checks"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' is TA-private (&old_pin_size/&pin_size) while source 'src' originates from serialargs buffer initialized from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from REE-derived src into TA memory; 'size' is caller-controlled and relies on prior serialargs validation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->remaining,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TA-allocated buffer while source 'buf0' is from earlier buffer possibly derived from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr + buf0_sz' is TA-allocated; source 'src' may be REE-derived.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes into buf + *blen using len/from data which may be influenced by REE without localized bounds enforcement here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "At this call-site serialargs_get is invoked with a fixed size (sizeof(uint32_t)) by callers (e.g., entry_ck_set_pin) and serialargs_get_ptr enforces availability of that many bytes before TEE_MemMove, so no evident out-of-bounds copy here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (params->memref.buffer)",
      "propagation_path": [
        "params->memref.buffer -> serialargs_init /ctrlargs (pkcs11_token.c:1267)",
        "serialargs_get_ptr -> src (serializer.c:32)",
        "TEE_MemMove(out, src, size) (serializer.c:34)"
      ],
      "sink": "TEE_MemMove copying into TA-local out"
    },
    "exploitation_analysis": {
      "preconditions": [
        "caller supplies malformed serialargs buffer lacking required bytes",
        "serialargs_get_ptr incorrectly reports availability"
      ],
      "attack_scenario": "If serialargs_get_ptr incorrectly allowed a read beyond the provided buffer, an over-read or crash could occur when copying into TA memory.",
      "impact": "Denial-of-service or information disclosure from memory if upstream checks fail"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr robustly validates remaining bytes and size before returning success; add explicit remaining-bytes checks at each call-site as defense-in-depth."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Call-sites use fixed sizeof(uint32_t) for this invocation",
        "serialargs_get_ptr is invoked prior to the copy (serializer.c:32)"
      ],
      "negative_indicators": [
        "Exact implementation details of serialargs_get_ptr and its invariants are not in this analysis slice"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Given call-sites pass a fixed small size and serialargs_get_ptr is called before TEE_MemMove, the specific sink invocation at line 34 is not vulnerable. However, upstream validation correctness is crucial; if serialargs_get_ptr were faulty the copy could be unsafe.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 34 uses a fixed small size and is gated by serialargs_get_ptr which ensures the source pointer is valid for that size.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialargs_get_ptr:serializer.c:32",
      "evidence": "serialargs_get_ptr(args, &src, size) is called and must succeed before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_set_pin:pkcs11_token.c:1248-1255",
      "evidence": "Function checks expected ptypes (MEMREF_INOUT) before parsing"
    }
  ],
  "argument_safety": [
    {
      "arg": "size",
      "why_safe": "Call-sites pass sizeof(uint32_t) (constant) for these uses",
      "evidence": "pkcs11_token.c:1273,1277,1420,1424"
    },
    {
      "arg": "out",
      "why_safe": "Out points to TA-local uint32_t variables (&old_pin_size/&pin_size)",
      "evidence": "pkcs11_token.c:1273-1280"
    }
  ],
  "residual_risks": [
    "If serialargs_get_ptr's internal validation is flawed, the copy at line 34 could become unsafe."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed small copy length at call-sites",
      "Explicit pre-copy call to serialargs_get_ptr"
    ],
    "negative_indicators": [
      "serialargs_get_ptr implementation not shown here; its correctness is assumed"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 34 is protected in practice by serialargs_get_ptr and fixed-size use at callers; lacking evidence of a broken serialargs_get_ptr, treat this sink as safe while noting upstream structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE-provided buffer to obtain pointers into that buffer without stronger semantic validation beyond serialargs helpers.",
      "code_excerpt": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=size,src_sz=args->remaining,dst_sz=size"
        ]
      },
      "why": "Copies caller-controlled 'size' bytes from REE-derived src into TA memory; relies on serialargs_get_ptr correctness.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies rc into caller-provided memref.buffer (REE-visible); destination is shared but rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #139: TA_InvokeCommandEntryPoint -> entry_ck_login -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_loginserialargs_getTEE_MemMove

実行時間: 103.93秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: Insufficient public evidence of missing bounds enforcement at the exact call site; upstream checks exist but implementation of serialargs_get_ptr is not visible here, so classify as not applicable for a direct vulnerability and surface structural risks.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_login at lines [1420, 1424]:
-- Call #1 at line 1420 --
1418: return rc;
1419:
1420: >>> rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));
1421: if (rc)
1422: return rc;
-- Call #2 at line 1424 --
1422: return rc;
1423:
1424: >>> rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));
1425: if (rc)
1426: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "args",
        "rhs": "caller-provided &ctrlargs (which originates from ctrl->memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1414"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1420,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'args' aliases &ctrlargs which was initialised from ctrl->memref.buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1420,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'out' aliases TA stack variable (&user_type) — TA-private destination for the copy.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &user_type, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1424,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'args' aliases &ctrlargs for second call as well (same REE-origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1424,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'out' aliases TA stack variable (&pin_size) — TA-private destination for the copy.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &pin_size, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 32,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (provided by serialargs_get_ptr) into out without local validation; size may be influenced by caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dest",
        "rhs": "buf0 / src (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "dest",
        "rhs": "data (copied)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee dest 'out' aliases caller-provided TA stack/storage (&user_type or &pin_size) — destination is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee src 'src' is provided by serialargs_get_ptr and ultimately originates from ctrl->memref.buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from REE-origin src into out without additional validation beyond the earlier pointer retrieval; size is caller-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee dest 'ptr' aliases local allocation (ptr) — destination is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee src 'buf0' origin unclear (could be TA or REE); origin marked unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee dest 'ptr + buf0_sz' aliases TA-local allocation region — destination is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee src 'src' origin unclear at this call-site (marked unknown).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee dest 'buf + *blen' aliases caller buffer (likely TA-owned) used for accumulation; destination region marked TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes into buf+*blen without local bounds check here; if len or *blen influenced by attacker, may overflow destination.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies 'size' bytes from src (originating from REE memref) into a TA-private out; upstream code performs argument/type checks and serialargs_get_ptr likely enforces available-bytes, but exact bounds validation at this call site is unclear, so do not classify as directly vulnerable here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer (REE-visible)",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs (serialargs_init) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1414",
        "ctrlargs -> serialargs_get_ptr(&ctrlargs,&src,size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "src -> TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "TEE_MemMove(out, src, size) writes into TA-private destination"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls contents and sizes in the REE-provided memref buffer",
        "serialargs_get_ptr does not adequately bound-check size against remaining bytes"
      ],
      "attack_scenario": "If serialargs_get_ptr or earlier checks are insufficient, an attacker could cause an over-read or copy of unexpected bytes into TA memory or trigger incorrect parsing leading to logic errors.",
      "impact": "Potential memory-safety issues or improper handling of attacker-controlled input; no direct secret leakage evidenced at this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:34",
        "recommendation": "Ensure serialargs_get_ptr enforces size <= remaining bytes and that size is validated before TEE_MemMove; perform explicit range checks here as well."
      },
      {
        "type": "type_validation",
        "location": "entry_ck_login:1411-1414",
        "recommendation": "Validate pin_size and user_type ranges and fail early on unreasonable sizes to reduce risk."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source is REE-visible memref (tainted)",
        "TEE_MemMove is used with caller-controlled length 'size'"
      ],
      "negative_indicators": [
        "entry_ck_login enforces ptypes == expected and checks serialargs_remaining_bytes after reads",
        "serialargs_get_ptr likely verifies available bytes before returning src (call-site check present but implementation not shown)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Insufficient public evidence of missing bounds enforcement at the exact call site; upstream checks exist but implementation of serialargs_get_ptr is not visible here, so classify as not applicable for a direct vulnerability and surface structural risks.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Upstream type/argument checks and remaining-bytes consumption checks exist and no clear proof of missing bounds at this exact TEE_MemMove call; ambiguity warrants conservatism.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_login:1411-1412",
      "evidence": "if (!client || ptypes != exp_pt) return PKCS11_CKR_ARGUMENTS_BAD"
    },
    {
      "type": "consumption_check",
      "location": "entry_ck_login:1432-1433",
      "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
    }
  ],
  "argument_safety": [
    {
      "arg": "args",
      "why_safe": "Initialized from ctrl->memref.buffer with exp_pt enforced at caller",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1406-1414"
    },
    {
      "arg": "out",
      "why_safe": "Caller provides TA-local addresses (&user_type,&pin_size) as destinations",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1420-1425"
    }
  ],
  "residual_risks": [
    "line 34: potential weak_input_validation (size is caller-controlled) — depends on correctness of serialargs_get_ptr; verify its bounds checks",
    "possible information-disclosure if downstream copies TA-private secrets into REE-visible buffers elsewhere (not at this line)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from REE-origin src into TA memory with attacker-controlled length"
    ],
    "negative_indicators": [
      "Upstream ptypes/type checks and remaining-bytes consumption reduce likelihood of direct overflow"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given upstream validations present but missing visibility into serialargs_get_ptr, the conservative choice is to not mark the TEE_MemMove at line 34 as a confirmed vulnerability while surfacing weak_input_validation as a structural risk requiring review of serialargs_get_ptr's bounds checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies caller-controlled 'size' bytes from REE-origin src into TA-private out without an explicit local bounds check at this line; correctness depends on serialargs_get_ptr's validation.",
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); if (!rc) TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #140: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueserialargs_getTEE_MemMove

実行時間: 84.91秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The sink copies REE-controlled bytes into TA memory (potentially unsafe), but the destination for the observed callsite is TA-private, so this specific line is not an unencrypted output to REE; memory-safety concerns remain but no definitive bounds violation evidence is present.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [773, 946, 998, 1114]:
-- Call #1 at line 773 --
771: return rc;
772:
773: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
774: if (rc)
775: return rc;
-- Call #2 at line 946 --
944: return rc;
945:
946: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
947: if (rc)
948: return rc;
-- Call #3 at line 998 --
996: return rc;
997:
998: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
999: if (rc)
1000: return rc;
-- Call #4 at line 1114 --
1112: return rc;
1113:
1114: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
1115: if (rc)
1116: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) (written)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 773,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'args' parameter is passed as &ctrlargs from caller (ctrlargs holds REE-provided buffer), so callee args aliases a structure whose buffer originates from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 773,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Binding: 'out' parameter is passed as &object_handle (TA-private) from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (obtained from REE-backed serialargs buffer) into caller-provided out; source is REE-controlled and size origin may be attacker-influenced via serialargs state.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "out",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "first argument of TEE_MemMove call (destination pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:<call-site>"
      },
      {
        "lhs": "src",
        "rhs": "second argument of TEE_MemMove call (source pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:<call-site>"
      },
      {
        "lhs": "len",
        "rhs": "third argument of TEE_MemMove call (size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:<call-site>"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination 'out' at call site comes from caller's out parameter (caller-provided), origin depends on call chain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source 'src' is obtained via serialargs_get_ptr from args which may be backed by REE-visible memref buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination 'ptr' (first call) is TA-allocated buffer (alloc_and_get), origin TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source 'buf0' is from caller/context; origin unclear (could be REE or TA), treated as unknown.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination 'ptr + buf0_sz' is TA-private pointer arithmetic writing into allocated buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source 'src' may originate from serialargs buffer (REE-backed), so copy may move REE-controlled bytes into TA memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination 'buf + *blen' is a TA buffer but pointer arithmetic uses *blen (TA-controlled), origin TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source 'data' origin depends on caller; in some call-sites data may be REE-controlled, treated as unknown here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'size' bytes from src (likely REE-backed serialargs buffer) into caller-provided 'out' which at the observed callsites is a TA-private destination (&object_handle); no evidence of secret→REE copy at this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (ctrl->memref.buffer) via serialargs_get_ptr",
      "propagation_path": [
        "serialargs_get_ptr -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34 (sink)"
      ],
      "sink": "TEE_MemMove copies into 'out' (TA-local at callsite)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls serialargs contents in REE-visible memref passed into TA",
        "No additional bounds/validation in serialargs_get_ptr for requested size"
      ],
      "attack_scenario": "Malformed serialargs could cause unexpected data to be copied into TA memory, possibly corrupting TA state if size is larger than intended.",
      "impact": "Potential TA memory corruption or logic disruption; not an immediate REE exposure at this line."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:32|unknown",
        "recommendation": "Ensure serialargs_get_ptr validates that 'size' does not exceed remaining serialargs buffer and that 'out' target size is sufficient before copying."
      },
      {
        "type": "type_validation",
        "location": "caller:object.c:773",
        "recommendation": "Validate that requested sizes align with expected types/limits (e.g., uint32_t) and fail early on inconsistencies."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source (serialargs buffer) is REE-controlled per callsite context",
        "TEE_MemMove performs direct copy of attacker-influenced bytes"
      ],
      "negative_indicators": [
        "Destination at observed callsite is TA-private (&object_handle), so this line does not leak to REE",
        "Higher-level checks (ptypes, serialargs parsing) exist in caller which may limit exposure"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The sink copies REE-controlled bytes into TA memory (potentially unsafe), but the destination for the observed callsite is TA-private, so this specific line is not an unencrypted output to REE; memory-safety concerns remain but no definitive bounds violation evidence is present.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Although src is REE-controlled, the destination at this callsite is TA-private and there is no evidence of sensitive data being sent to REE or an out-of-bounds copy at this exact line.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_get_attribute_value:745-765",
      "evidence": "ptypes == exp_pt check"
    },
    {
      "type": "bounds_check",
      "location": "entry_get_attribute_value:781-784",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) validated in caller"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "partially parsed/validated by caller before serialargs_get is invoked",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:767-777"
    },
    {
      "arg": "out",
      "why_safe": "at the observed callsite out is &object_handle (TA-private) sized sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:773"
    }
  ],
  "residual_risks": [
    "serialargs_get copies attacker-controlled bytes into TA memory (possible memory corruption) if serialargs_get_ptr does not enforce bounds",
    "Downstream uses of TA memory populated here might later be copied to REE (separate sink lines), enabling information disclosure"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Callstack shows src derived from REE-backed memref",
      "Direct TEE_MemMove of 'size' bytes"
    ],
    "negative_indicators": [
      "Destination at this callsite is TA-private",
      "Caller performs some protocol/type validation prior to call"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line-level evaluation shows a REE->TA copy but not a TA->REE disclosure or clear bounds overflow at this line; therefore not classified as vulnerable for information disclosure or memory-safety at this specific sink.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from REE-backed serialargs buffer into TA memory without explicit per-callsite bounds proof here.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #141: TA_InvokeCommandEntryPoint -> entry_get_object_size -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_object_sizeserialargs_getTEE_MemMove

実行時間: 79.04秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The call at line 34 performs REE->TA copy but is guarded by serialargs_get_ptr success; no evidence that secrets are being sent to REE from this line and bounds checks are present earlier, so it is not classified as vulnerable for exfiltration or overflow here.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_object_size at lines [946, 998, 1114]:
-- Call #1 at line 946 --
944: return rc;
945:
946: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
947: if (rc)
948: return rc;
-- Call #2 at line 998 --
996: return rc;
997:
998: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
999: if (rc)
1000: return rc;
-- Call #3 at line 1114 --
1112: return rc;
1113:
1114: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
1115: if (rc)
1116: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "rc",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out (written)",
        "rhs": "src via TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "rc",
        "rhs": "return value of serialargs_get_ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-33"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34",
        "evidence": "copies only if serialargs_get_ptr returned success (rc == 0)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 946,
      "function": "entry_get_object_size",
      "rule": "other",
      "why": "alias of callee parameter 'args' bound to caller '&ctrlargs' which was initialized from ctrl->memref.buffer (REE-provided shared buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 946,
      "function": "entry_get_object_size",
      "rule": "other",
      "why": "alias of callee parameter 'out' bound to caller '&object_handle' (TA-local stack variable)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from serialargs buffer, REE-origin) into caller-provided out pointer; potential untrusted input copied into TA memory",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=serialargs_remaining_or_buffer_size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst (written)",
        "rhs": "src via TEE_MemMove(dst, src, len)",
        "site": "unknown:TEE_MemMove"
      },
      {
        "lhs": "rc (caller-visible effect)",
        "rhs": "side-effect of memory copy from src to dst",
        "site": "unknown:TEE_MemMove"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "unknown:TEE_MemMove",
        "evidence": "implementation should ensure non-overlapping buffers and valid lengths (not visible here)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from src (derived from serialargs buffer initialized from ctrl->memref.buffer, REE-provided) into out (caller TA memory); untrusted src flows into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=serialargs_buffer_size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "TEE_MemMove copies buf0_sz bytes from buf0 into ptr; origins of buf0/ptr uncertain (could be REE-visible or TA-private), potential aliasing of shared buffers.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=available_ptr_space"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "TEE_MemMove copies 'size' bytes from src into ptr+buf0_sz; src origin uncertain (could be REE-derived), and write uses pointer arithmetic into ptr.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=available_ptr_space - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "some_function",
      "rule": "other",
      "why": "TEE_MemMove appends 'len' bytes from data into buf + *blen; src likely caller data (potentially REE-visible) and destination uses runtime blen offset, risk of overflow if bounds not enforced here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=buffer_total_size - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "TEE_MemMove at this site copies 'size' bytes from a serialargs-derived src (validated by serialargs_get_ptr) into a TA-local out buffer; this is REE->TA flow with bounds checked by serialargs_get_ptr, so not an exploitable sink for REE exfiltration at this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "ctrl->memref.buffer (params from REE)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:940",
        "serialargs_get_ptr -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32",
        "TEE_MemMove(out, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      ],
      "sink": "out (TA-local) written by TEE_MemMove"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious/controlled REE-provided serialargs buffer",
        "serialargs_get_ptr returns success (rc==0) indicating available bytes"
      ],
      "attack_scenario": "Malformed REE data could be copied into TA memory, but serialargs_get_ptr is expected to prevent out-of-bounds reads; this copy does not send secrets to REE.",
      "impact": "If serialargs_get_ptr is flawed, TA memory could be corrupted leading to crash/logic issues; no direct secret exfiltration at this line."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "serialargs_get_ptr:unknown",
        "recommendation": "Ensure serialargs_get_ptr strictly validates requested size against remaining buffer and fails safely."
      },
      {
        "type": "type_validation",
        "location": "serialargs_get:32-34",
        "recommendation": "Confirm 'size' values are constrained and expected for each caller to reduce misuse."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr return value is checked before copy (rc==0)",
        "calls using small fixed sizes (sizeof(uint32_t)) in callers"
      ],
      "negative_indicators": [
        "implementation of serialargs_get_ptr not shown here (assumed correct)",
        "src provenance is REE-controlled"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The call at line 34 performs REE->TA copy but is guarded by serialargs_get_ptr success; no evidence that secrets are being sent to REE from this line and bounds checks are present earlier, so it is not classified as vulnerable for exfiltration or overflow here.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "serialargs_get_ptr validates availability and serialargs_get checks its return before TEE_MemMove, preventing obvious over-read/overflow at this call site and the flow is into TA memory rather than REE.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:32",
      "evidence": "serialargs_get_ptr return checked (rc==0) before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "object.c:937-938",
      "evidence": "ptypes == exp_pt enforced in caller"
    }
  ],
  "argument_safety": [
    {
      "arg": "out",
      "why_safe": "caller supplies a TA-local buffer (&object_handle) sized sizeof(uint32_t)",
      "evidence": "object.c:946 and surrounding usage"
    },
    {
      "arg": "src/size",
      "why_safe": "serialargs_get_ptr validates and guarantees available bytes before success",
      "evidence": "serializer.c:32-34"
    }
  ],
  "residual_risks": [
    "line 966: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size)) writes TA data to REE-visible buffer (potential information exposure) — not the evaluated sink line but a structural risk",
    "serialargs_get_ptr implementation not shown; a bug there could enable overflow/corruption"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "checked rc before copy",
      "fixed small copy sizes at callers"
    ],
    "negative_indicators": [
      "src is REE-controlled",
      "lack of visibility into serialargs_get_ptr internals"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the guard on serialargs_get_ptr and that the copy writes into TA-local memory, the line does not meet vulnerability criteria for unencrypted output or unchecked buffer overflow based on available evidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "entry_get_object_size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies computed obj_size into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared even though obj_size appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=serialargs_buffer_size,dst_sz=size"
        ]
      },
      "why": "Copies 'size' bytes from serialargs buffer (initialized from REE memref) into TA memory; ensure serialargs_get_ptr robustly bounds checks.",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}
フロー #142: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueserialargs_getTEE_MemMove

実行時間: 90.85秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

安全判定理由: The call copies a small fixed size (sizeof uint32_t) into a TA-private destination; upstream parameter-type checks and serialargs_remaining_bytes checks provide contextual validation, so no tainted→dangerous-sink condition with insufficient sanitization is evident at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [998, 1114]:
-- Call #1 at line 998 --
996: return rc;
997:
998: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
999: if (rc)
1000: return rc;
-- Call #2 at line 1114 --
1112: return rc;
1113:
1114: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
1115: if (rc)
1116: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "caller-provided out pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "out (memory)",
        "rhs": "TEE_MemMove(out, src, size) copies size bytes from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34-35"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 998,
      "function": "serialargs_get (call-site)",
      "rule": "other",
      "why": "caller passes &object_handle as out parameter (TEE-private) to serialargs_get; binding records origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 998,
      "function": "serialargs_get (call-site)",
      "rule": "other",
      "why": "caller-provided args (&ctrlargs) originated from ctrl->memref.buffer (REE-visible); binding records shared buffer passed into serialargs_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "weak_input_validation",
      "why": "copies size bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into caller out without local validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "out",
      "src",
      "size",
      "ptr",
      "buf0",
      "buf0_sz",
      "data",
      "len",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "out (destination)",
        "rhs": "caller-provided out pointer at call-sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "src (source)",
        "rhs": "caller-provided src pointer at call-sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34,66,67,188"
      },
      {
        "lhs": "memory at out",
        "rhs": "copied from src by TEE_MemMove(out, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: caller passes 'out' (&object_handle in upstream) as destination into TEE_MemMove; record origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=sizeof(rc?)?,dst_sz=sizeof(rc?)?"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into out without validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination 'ptr' passed as first arg (TEE-private) to TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source 'buf0' passed as second arg; origin unclear (could be REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination 'ptr + buf0_sz' (TEE-private pointer arithmetic) passed as first arg",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source 'src' passed as second arg; origin depends on caller (possibly REE-derived)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination 'buf + *blen' passed as first arg (TEE-private buffer with offset)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'len' bytes from data into buf+*blen without local validation here; if data is REE-derived this is an unvalidated inbound copy",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies fixed-size (size argument = sizeof(uint32_t) at call-site) from src (derived from REE buffer) into a TA-private out (&object_handle); no evidence of overflow and upstream argument/type checks exist.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call copies a small fixed size (sizeof uint32_t) into a TA-private destination; upstream parameter-type checks and serialargs_remaining_bytes checks provide contextual validation, so no tainted→dangerous-sink condition with insufficient sanitization is evident at this line.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_set_attribute_value:974-991",
      "evidence": "ptypes checked against expected exp_pt and function returns on mismatch"
    },
    {
      "type": "bounds_check",
      "location": "entry_set_attribute_value:1006-1009",
      "evidence": "serialargs_remaining_bytes check causing error if extra data"
    }
  ],
  "argument_safety": [
    {
      "arg": "out (&object_handle)",
      "why_safe": "destination is a local TA-private variable of known size (uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:998"
    },
    {
      "arg": "size",
      "why_safe": "fixed at call-site sizeof(uint32_t)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:998"
    },
    {
      "arg": "src",
      "why_safe": "source derived from serialargs parsing of REE buffer but size is bounded by call-site; potential upstream validation exists",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32-34"
    }
  ],
  "residual_risks": [
    "line 34: source (src) is derived from REE-provided buffer; correctness depends on serialargs_get_ptr validation (implementation not shown) and upstream parsing assumptions"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "copy length is fixed and small (sizeof(uint32_t))",
      "ptypes/type validation in entry_set_attribute_value",
      "serialargs_remaining_bytes check present elsewhere in the caller"
    ],
    "negative_indicators": [
      "implementation of serialargs_get_ptr is not shown here (unknown internal bounds checks)",
      "src originates from REE-visible memref, so malicious REE could craft content if serialargs_get_ptr lacks checks"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety precedence: no evidence size exceeds destination; information-disclosure promotion not applicable because destination is TA-private. Given fixed small copy and caller-side checks, line 34 is not classified as vulnerable, but residual risk remains if serialargs_get_ptr lacks internal validation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared even though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=NA"
        ]
      },
      "why": "alias of caller-provided client pointer passed into callee; origin of client is tainted/unknown from upstream invocation",
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "alias of caller-provided params (memref buffer) passed into callee; params->memref.buffer is REE-origin shared memory",
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_init/alloc consume caller-provided memref buffer and template->attrs_size (from REE) is used to compute template_size without strong validation",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "copies size bytes from src (obtained from serialargs_get_ptr, likely derived from REE buffer) into out without validation here",
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 998,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "binding: caller-provided args (&ctrlargs) originated from ctrl->memref.buffer (REE-visible); shared buffer passed into serialargs_get",
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    }
  ]
}
フロー #143: TA_InvokeCommandEntryPoint -> entry_copy_object -> serialargs_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectserialargs_getTEE_MemMove

実行時間: 79.70秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34

パラメータインデックス: 0

解析結果

詳細: The copy at line 34 moves a fixed small amount (sizeof(uint32_t)) from a source derived from the ctrl buffer into a TA-private variable; this does not write REE-visible memory nor expose sensitive TA-private data, and the caller constrained the requested size, so it is not classified as vulnerable for information disclosure or memory-safety here.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: serialargs_get
プロンプト 中間 (serialargs_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialargs_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1114]:
-- Call #1 at line 1114 --
1112: return rc;
1113:
1114: >>> rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));
1115: if (rc)
1116: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

27: enum pkcs11_rc serialargs_get(struct serialargs *args, void *out, size_t size)
28: { 29: enum pkcs11_rc rc = PKCS11_CKR_OK; 30: void *src = NULL; 31: 32: rc = serialargs_get_ptr(args, &src, size); 33: if (!rc) 34: TEE_MemMove(out, src, size); 35: 36: return rc; 37: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialargs_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialargs_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialargs_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialargs_get",
    "tainted_vars": [
      "args",
      "out",
      "size",
      "src"
    ],
    "propagation": [
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:32"
      },
      {
        "lhs": "out",
        "rhs": "TEE_MemMove(out, src, size) copies from src to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "object_handle (caller)",
        "rhs": "serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t)) -> out written",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1114"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1114,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter receives address of ctrlargs initialized from ctrl->memref.buffer (caller-controlled REE buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1114,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter aliases caller stack variable '&object_handle' (TA-private destination for data parsed from REE-provided buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "serialargs_get",
      "rule": "other",
      "why": "Copies 'size' bytes from src (returned by serialargs_get_ptr, likely into REE-provided memref buffer) into caller-supplied out via TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_get at lines [34, 66, 67, 188]:
-- Call #1 at line 34 --
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
-- Call #2 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #3 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #4 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 34:
29: enum pkcs11_rc rc = PKCS11_CKR_OK;
30: void *src = NULL;
31:
32: rc = serialargs_get_ptr(args, &src, size);
33: if (!rc)
34: >>> TEE_MemMove(out, src, size);
35:
36: return rc;
37: }
38:
39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "data copied from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:34"
      },
      {
        "lhs": "dst",
        "rhs": "data copied from buf0 via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "dst+buf0_sz",
        "rhs": "data copied from src via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data copied from data via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out' is caller-provided pointer (callee dst aliases caller variable)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 34,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'src' originates from serialargs_get_ptr reading from args (likely REE-provided buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: first call destination 'ptr' points to allocated buffer (TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: first call source 'buf0' provenance uncertain (could be REE or TA); treated as unknown",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: second call destination 'ptr + buf0_sz' is TA-private buffer offset (in-place aliasing risk if arithmetic tainted)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: second call source 'src' here originates from args/buffer (likely REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'buf + *blen' is TA buffer offset; arithmetic uses *blen which may be tainted if caller-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'data' originates from caller/serialargs (potentially REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [34]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [34] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      34
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 34,
      "function": "serialargs_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies size bytes from src (from serialargs_get_ptr reading caller-controlled ctrl->memref.buffer) into caller-supplied TA-private out; caller invoked serialargs_get with fixed size sizeof(uint32_t) limiting copy length.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "ctrl->memref.buffer (REE-visible)",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_init/ctrlargs (/workspace/.../ta/object.c:1108)",
        "serialargs_get_ptr(&ctrlargs,&src,size) -> src (/workspace/.../ta/serializer.c:32)",
        "TEE_MemMove(out, src, size) copies into out (caller &object_handle) (/workspace/.../ta/serializer.c:34 and /workspace/.../ta/object.c:1114)"
      ],
      "sink": "TEE_MemMove(out, src, size) writing into TA-private out"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls contents of ctrl->memref.buffer (REE client).",
        "serialargs_get_ptr must have been tricked into returning a src pointer and size that the callee accepts."
      ],
      "attack_scenario": "Malicious REE provides crafted ctrl buffer; serialargs_get copies a 4-byte object_handle value into TA stack variable. No secret data is exfiltrated on this line.",
      "impact": "Low — possible malformed values influencing TA logic, but this line copies into TA-private storage rather than exposing TA secrets to REE."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_get:32",
        "recommendation": "Ensure serialargs_get_ptr enforces that 'size' bytes are available and that returned src is within expected memref bounds; add explicit checks or assert."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Caller uses constant sizeof(uint32_t) for size at /workspace/.../ta/object.c:1114",
        "Entry-level checks verify ptypes and out->memref.size == sizeof(obj_handle) earlier (/workspace/.../ta/object.c:1104-1106)"
      ],
      "negative_indicators": [
        "serialargs_get_ptr implementation not available here; correctness of its bounds enforcement is assumed",
        "src region provenance is inferred (likely REE-visible) but not proven in this snippet"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 34 moves a fixed small amount (sizeof(uint32_t)) from a source derived from the ctrl buffer into a TA-private variable; this does not write REE-visible memory nor expose sensitive TA-private data, and the caller constrained the requested size, so it is not classified as vulnerable for information disclosure or memory-safety here.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The sink copies a small, caller-requested fixed size into TA-private storage with caller-side checks; no evidence that sensitive TA-private data is sent to REE or that bounds checks are missing for this specific copy.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_copy_object:1104-1106",
      "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
    },
    {
      "type": "bounds_check",
      "location": "entry_copy_object:1122-1125",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) -> error if leftover bytes"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (serialargs)",
      "why_safe": "initialized from ctrl->memref.buffer but later checked by serialargs APIs; provenance is REE-visible so contents are untrusted",
      "evidence": "/workspace/.../ta/object.c:1108"
    },
    {
      "arg": "out (caller &object_handle)",
      "why_safe": "caller provides TA-private address (&object_handle) and requests sizeof(uint32_t); destination is TA-private",
      "evidence": "/workspace/.../ta/object.c:1114"
    }
  ],
  "residual_risks": [
    "Line 34 relies on serialargs_get_ptr to enforce availability of 'size' bytes in the source; if serialargs_get_ptr is flawed, over-read or corrupted reads could occur."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "fixed size argument (sizeof(uint32_t)) at call-site",
      "entry function validates out->memref.size before deserializing"
    ],
    "negative_indicators": [
      "lack of visible implementation for serialargs_get_ptr to prove its bounds checks",
      "src region provenance inferred"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given caller constraints and that the copy writes into TA-private memory, the sink at line 34 is not a vulnerable information-disclosure or memory-safety instance in this context; structural risk remains if serialargs_get_ptr is incorrect.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1114,
      "function": "entry_copy_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Caller passes size sizeof(uint32_t) to serialargs_get; data read from REE-provided ctrl buffer is copied into TA-private &object_handle—structural risk if serialargs_get_ptr mis-validates bounds.",
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &object_handle, sizeof(uint32_t));"
    }
  ]
}
フロー #144: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_alloc_get_one_attribute -> alloc_and_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_secretserialargs_alloc_get_one_attributealloc_and_getTEE_MemMove

実行時間: 73.79秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: REE-provided serialargs buffer (params->memref.buffer)

シンク: TEE_MemMove(dst=ptr+buf0_sz, src, size) in alloc_and_get (serializer.c:67)

判定理由: The copy at line 67 uses an attacker-controllable 'size' parsed from REE data; while integer overflow is checked, there is no explicit semantic bounds validation of 'size' against expected attribute limits, producing a plausible memory-safety vulnerability (over-read/overflow) at the copy site.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [119, 140]:
-- Call #1 at line 119 --
117: return rc;
118:
119: >>> rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);
120: if (rc)
121: return rc;
-- Call #2 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "rc",
      "ptr",
      "src",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) -> sz = buf0_sz + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) reads 'size' bytes from args buffer into src (pointer into args region or copy)",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...) allocated buffer of computed sz",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size) copy buf0 and src into ptr",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-68"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to out",
        "site": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW returns error if buf0_sz + size overflows"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-64",
        "evidence": "checks return codes of serialargs_get_ptr and TEE_Malloc and restores args->next on memory alloc failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Untrusted size controls allocation and subsequent MemMove of 'size' bytes from src (derived from args) without further bounds validation here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sz(buf0_sz+size),src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); ... TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Argument 'args' originates from caller-provided serialargs (shared/REE buffer) and is forwarded into parsing/copy operations",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "buf0 is a pointer into caller-local buffer (often address of local 'head' or 'attr') passed in; treated as source for MemMove into newly allocated buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "out parameter is bound to allocated pointer 'ptr' (TEE_Malloc), creating alias from callee to caller storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "*out = ptr;"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "ptr",
      "buf0",
      "buf0_sz",
      "src (serialargs)",
      "size",
      "buf",
      "blen",
      "data"
    ],
    "propagation": [
      {
        "lhs": "dst (ptr or buf + *blen)",
        "rhs": "destination pointer passed to TEE_MemMove from caller sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      },
      {
        "lhs": "dst contents",
        "rhs": "copied from src via TEE_MemMove(dst, src, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      },
      {
        "lhs": "src",
        "rhs": "various caller-provided buffers (buf0, src from serialargs, data)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW checked earlier when computing total copy size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 (likely TA-private struct data) into newly allocated ptr in-place; binding of caller buf0 into dst occurs here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from src (derived from serialargs/REE) into TA-private buffer ptr+buf0_sz; length 'size' is from untrusted args",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data into buf at offset *blen; origin/regions of buf and data ambiguous here causing structural alias risk",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies buf0 (TA-private struct data) into newly allocated TA-private buffer; sources and sizes are TA-internal (buf0_sz == buf0_sz) and prior overflow check on total size applies—no REE→REE leakage at this call site.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'size' bytes from src (derived from serialargs, i.e., REE-provided) into TA-private buffer; 'size' is controllable by REE and only limited by earlier parsing but lacks a concrete bounds validation here, risking over-read/overflow during copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (params->memref.buffer)",
      "propagation_path": [
        "params->memref.buffer -> serialargs_init/ctrlargs (processing.c:226)",
        "serialargs parsing yields head.size/proc length -> passed into alloc_and_get as 'size' (serializer.c:119)",
        "serialargs_get_ptr reads src from args (serializer.c:56) -> TEE_MemMove(ptr + buf0_sz, src, size) (serializer.c:67)"
      ],
      "sink": "TEE_MemMove(dst=ptr+buf0_sz, src, size) in alloc_and_get (serializer.c:67)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malicious/ malformed REE-provided serialargs with crafted head.size",
        "serialargs_get_ptr returns a pointer or data for the requested size (no earlier truncation)"
      ],
      "attack_scenario": "Attacker supplies a crafted size and payload such that the copy overruns the allocated region or causes an over-read, leading to memory corruption or exposure of adjacent TA memory.",
      "impact": "Arbitrary memory corruption within TA heap (potential code execution) or disclosure of TA-private memory contents, depending on layout."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "alloc_and_get:48-68",
        "recommendation": "Validate 'size' against a known safe maximum and ensure combined sz fits expected object limits before serialargs_get_ptr and TEE_MemMove."
      },
      {
        "type": "type_validation",
        "location": "serializer.c:115-121",
        "recommendation": "Validate parsed head.size against logical object/schema limits (reject absurd or excessively large sizes)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size is derived from parsed head.size (untrusted)",
        "copy performed directly from src with length 'size' into allocated buffer; only ADD_OVERFLOW checked combined size, not semantic limits"
      ],
      "negative_indicators": [
        "ADD_OVERFLOW check prevents integer wrap when computing total sz",
        "serialargs_get_ptr and alloc_and_get check return codes (rc) which may prevent some malformed inputs"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 67 uses an attacker-controllable 'size' parsed from REE data; while integer overflow is checked, there is no explicit semantic bounds validation of 'size' against expected attribute limits, producing a plausible memory-safety vulnerability (over-read/overflow) at the copy site.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 67,
        "function": "alloc_and_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies 'size' bytes from REE-derived src into allocated buffer without semantic limits on 'size'; size originates from parsed head.size."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents integer wrap for total allocation size"
    },
    {
      "type": "error_check",
      "location": "alloc_and_get:56-64",
      "evidence": "Checks serialargs_get_ptr return and TEE_Malloc result, restoring args->next on alloc failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0, buf0_sz",
      "why_safe": "buf0 is TA-local structured data copied with its explicit size",
      "evidence": "serializer.c:66"
    },
    {
      "arg": "src, size",
      "why_safe": "not fully safe—'size' derived from REE and lacks semantic bounds checks here",
      "evidence": "serializer.c:56-67"
    }
  ],
  "residual_risks": [
    "Line 67 memory-safety finding suppresses immediate information-disclosure labeling (unencrypted_output) though TA-private data could be exposed if heap layout allows over-read."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of untrusted 'size' in TEE_MemMove at line 67",
      "Propagation chain from REE params to serialargs to alloc_and_get is explicit"
    ],
    "negative_indicators": [
      "Integer overflow check on combined size and checked rc from serialargs_get_ptr/TEE_Malloc reduce some exploitability",
      "No direct evidence of missing checks inside serialargs_get_ptr (internal behavior unknown)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety analysis yields a concrete risky copy at line 67 because an untrusted length controls a memory copy into an allocated buffer; available checks do not fully constrain the untrusted length, making the line vulnerable to over-read/overflow.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sz(buf0_sz+size),src_sz=unknown,dst_sz=sz"
        ]
      },
      "why": "Untrusted head.size controls allocation and copy; lacks semantic bounds validation.",
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size); ... TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 107,
      "function": "serialargs_alloc_get_one_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Caller-provided serialargs buffer is parsed and used to allocate attribute structures (aliasing of shared buffer into TA-private allocations).",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    }
  ]
}
フロー #145: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_alloc_get_one_attribute -> alloc_and_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_generate_key_pairserialargs_alloc_get_one_attributealloc_and_getTEE_MemMove

実行時間: 106.84秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided control buffer (ctrl->memref.buffer) used to build serialargs and header with head.size

シンク: TEE_MemMove at serializer.c:67 copying REE-derived data into TEE memory

判定理由: The sink at line 67 copies REE-controlled bytes with length derived from REE header (head.size). While overflow of combined size is checked, there is insufficient explicit validation of head.size against available/expected limits; therefore weak input validation can lead to unsafe copies.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [119, 140]:
-- Call #1 at line 119 --
117: return rc;
118:
119: >>> rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);
120: if (rc)
121: return rc;
-- Call #2 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "src",
      "ptr",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) computes total copy size from buf0_sz and size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) obtains pointer to 'size' bytes from args (REE-derived buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...) allocates destination buffer of computed sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) then TEE_MemMove(ptr + buf0_sz, src, size) copy buf0 and src into allocated buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-68"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned as output pointer to caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-71"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked and returns error on overflow"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64",
        "evidence": "TEE_Malloc failure handled by restoring args->next and returning error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'args' to caller ctrlargs (derived from REE-provided memref buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'orig_next' to caller orig_next (cursor into REE buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'buf0' to caller &head (TA-local source header)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=sizeof(head),dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'out' to caller &p (TA-local recipient pointer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'args' to caller ctrlargs (REE-derived) at second call site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'orig_next' to caller orig_next (REE cursor) at second call site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'buf0' to caller &attr (TA-local header) at second call site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=sizeof(attr),dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "binds callee 'out' to caller &p (TA-local) at second call site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "uses caller-supplied size to request serialargs_get_ptr and to control copies without extra validation here",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest[0..len-1]",
        "rhs": "src[0..len-1] copied by TEE_MemMove at call sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "unknown",
        "evidence": "TEE_MemMove calls rely on caller-side checks (overflow checked in caller alloc_and_get); no additional checks here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binds destination 'ptr' (TEE-allocated) to caller-local pointer; copies TA-local header region into allocated buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'size' bytes from src (obtained via serialargs_get_ptr from REE buffer) into TEE buffer without further validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "copies data (likely REE-provided) into buffer at offset *blen; potential unchecked bounds if caller did not validate",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=(*blen + len)"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies TA-local header (buf0) into TEE-allocated buffer; src is TEE-private (buf0) and caller ensured buf0_sz accounted for in sz/overflow check.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'size' bytes from src obtained from REE via serialargs_get_ptr into TEE buffer; head.size (from REE) controls allocation/copy and only limited validation exists, enabling potentially attacker-controlled length to drive copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided control buffer (ctrl->memref.buffer) used to build serialargs and header with head.size",
      "propagation_path": [
        "ctrl->memref.buffer -> serialargs_next (serialargs_init) @ processing.c:415",
        "serialargs_get reads header into head (head.size) @ serializer.c:115",
        "alloc_and_get calls serialargs_get_ptr to obtain src pointer to REE bytes @ serializer.c:56",
        "TEE_MemMove(ptr + buf0_sz, src, size) copies REE-controlled 'size' into TA buffer @ serializer.c:67"
      ],
      "sink": "TEE_MemMove at serializer.c:67 copying REE-derived data into TEE memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted ctrl memref (REE) to TA with manipulated head.size and payload",
        "serialargs_get_ptr returns pointer to requested bytes (caller-provided size present)"
      ],
      "attack_scenario": "Attacker crafts head.size to cause oversized copy semantics or unexpected allocation/content, leading to out-of-bounds read/write or corruption of TA memory during TEE_MemMove.",
      "impact": "Potential memory corruption within TA (denial-of-service or code execution depending on subsequent use); exposure of integrity of TA-internal structures."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "alloc_and_get:48-68",
        "recommendation": "Validate head.size against remaining serialargs bytes and reasonable limits before using it to allocate and copy; enforce max attribute sizes."
      },
      {
        "type": "type_validation",
        "location": "serialargs_alloc_get_one_attribute:115-121",
        "recommendation": "Sanitize header fields (head.size) and fail early on suspicious or excessive values."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "head.size (used as 'size') originates from serialized REE data (serialargs header)",
        "serialargs_alloc_get_one_attribute and alloc_and_get perform copies controlled by head.size",
        "only ADD_OVERFLOW for combined size checked; no explicit upper bound on head.size shown"
      ],
      "negative_indicators": [
        "ADD_OVERFLOW protects against simple addition overflow when computing total sz",
        "serialargs_get/serialargs_get_ptr may perform bounds checks (caller's checks observed elsewhere), but evidence here is partial"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The sink at line 67 copies REE-controlled bytes with length derived from REE header (head.size). While overflow of combined size is checked, there is insufficient explicit validation of head.size against available/expected limits; therefore weak input validation can lead to unsafe copies.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 67,
        "function": "alloc_and_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies 'size' bytes from REE-derived src into allocated buffer based on head.size without sufficient validation."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents integer wrap when summing copy lengths"
    },
    {
      "type": "type_validation",
      "location": "serialargs_alloc_get_one_attribute:115-117",
      "evidence": "serialargs_get reads fixed-size header and returns error on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0 / buf0_sz",
      "why_safe": "TA-local header copied first",
      "evidence": "serializer.c:66"
    },
    {
      "arg": "src / size",
      "why_safe": "partially validated by serialargs_get_ptr but ultimately derived from REE-controlled head.size; validation insufficient",
      "evidence": "serializer.c:56-67"
    }
  ],
  "residual_risks": [
    "line 67: memory-safety issue takes precedence; potential information-disclosure (unencrypted_output) not promoted because destination is TEE-private and data is not sensitive"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct copy from REE-derived pointer 'src' using head.size at serializer.c:67",
      "No explicit upper bound check on head.size observed in alloc_and_get"
    ],
    "negative_indicators": [
      "ADD_OVERFLOW prevents additive overflow when computing total allocation size",
      "serialargs_get/serialargs_get_ptr may include bounds checks not visible here"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety concern at serializer.c:67 is supported by taint flow from REE-controlled header to the copy length; protections are partial (overflow check) but do not cover semantic limits on head.size, so classify as weak input validation vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head.size,src_sz=ctrl->memref.size,dst_sz=allocated p size"
        ]
      },
      "why": "Uses head.size (from serialized header) to drive allocation and copy without additional validation here.",
      "code_excerpt": "alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sz"
        ]
      },
      "why": "Relies on caller-supplied size to request serialargs_get_ptr and to control copies without explicit semantic bounds checks.",
      "code_excerpt": "serialargs_get_ptr(args, &src, size);"
    }
  ]
}
フロー #146: TA_InvokeCommandEntryPoint -> entry_wrap_key -> serialargs_alloc_get_one_attribute -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyserialargs_alloc_get_one_attributealloc_and_getTEE_MemMove

実行時間: 103.05秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

安全判定理由: TEЕ_MemMove calls at lines 66 and 67 copy into a TA-private buffer sized with ADD_OVERFLOW and allocated before copying; serialargs_get_ptr and allocation checks mitigate direct memory-safety and disclosure on these lines.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_one_attribute at lines [119, 140]:
-- Call #1 at line 119 --
117: return rc;
118:
119: >>> rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);
120: if (rc)
121: return rc;
-- Call #2 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) -> sz = buf0_sz + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) reads 'size' bytes from args (reader-controlled)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz) allocates TA-private buffer of computed sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr+buf0_sz, src, size) copy buf0 (caller buf) and src (args-derived) into ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to caller out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-71"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) returns error on overflow"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58",
        "evidence": "checks rc after serialargs_get_ptr and returns on error"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64",
        "evidence": "checks TEE_Malloc result and resets args->next on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: 'args' originates from ctrlargs which wraps ctrl->memref.buffer (caller-shared), so reader pointer is alias of REE-visible buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: 'orig_next' is derived from args->next (caller-provided pointer into shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=remaining_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: 'buf0' points to a caller-local buffer (e.g., &head or &attr) which is TEE-private stack memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 119,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: 'out' points to caller 'p' (TA-private pointer) which will receive allocated memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=sizeof(void*)"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 48,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Uses 'size' (derived from reader-controlled data) to compute allocation/copies; only overflow check and serialargs_get_ptr error cover it but no explicit upper bound on size.",
      "sink_function": "serialargs_get_ptr",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=remaining_bytes,dst_sz=sz"
        ]
      },
      "code_excerpt": "if (ADD_OVERFLOW(buf0_sz, size, &sz))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Copies 'src' read from args (REE-visible) into newly allocated TA-private buffer via TEE_MemMove; origin of src is attacker-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "ptr",
      "buf0",
      "size",
      "buf",
      "data",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "receive bytes from src via TEE_MemMove call sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      },
      {
        "lhs": "src",
        "rhs": "provided by caller (buf0, src, data) at call sites",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'ptr' is TA-private buffer allocated by TEE_Malloc; source 'buf0' is TA-private (caller stack) copied into TA memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'buf0' originates from caller-provided buffer (caller stack) but is TA-private in this context.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'ptr + buf0_sz' is TA-private buffer region; source 'src' is read from args (REE-visible) and copied into TA memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'src' is derived from serialargs_get_ptr reading 'size' bytes from REE-controlled buffer (args).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'buf + *blen' likely points into caller-managed buffer; origin ambiguous but write may extend into REE-visible region depending on buf provenance.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'data' is caller-provided input; if 'buf' is REE-visible this copy could write REE-visible memory from attacker-controlled source.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->unknown",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies buf0 (caller-local/TEE-private buffer such as &head) into a TA-private allocation; allocation size computed and checked (ADD_OVERFLOW) and allocation performed before copy.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies src (read from REE-controlled serialargs) into TA-private allocated buffer whose size sz = buf0_sz + size was overflow-checked and allocated before the copy; serialargs_get_ptr also validates availability.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "TEЕ_MemMove calls at lines 66 and 67 copy into a TA-private buffer sized with ADD_OVERFLOW and allocated before copying; serialargs_get_ptr and allocation checks mitigate direct memory-safety and disclosure on these lines.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) returns error on overflow"
    },
    {
      "type": "mem_access_check",
      "location": "alloc_and_get:56-58",
      "evidence": "serialargs_get_ptr(args, &src, size) returns error if insufficient bytes"
    },
    {
      "type": "mem_access_check",
      "location": "alloc_and_get:60-64",
      "evidence": "checks TEE_Malloc result and restores args->next on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0",
      "why_safe": "caller-local buffer copied into TA-private allocation",
      "evidence": "serializer.c:66"
    },
    {
      "arg": "src",
      "why_safe": "read via serialargs_get_ptr which validates available bytes",
      "evidence": "serializer.c:56-58"
    },
    {
      "arg": "ptr",
      "why_safe": "allocated to size sz before copies",
      "evidence": "serializer.c:60-67"
    }
  ],
  "residual_risks": [
    "alloc_and_get uses 'size' (reader-controlled) to compute allocation; while overflow and presence checks exist, there is no explicit upper bound on 'size' which may allow excessive allocations (resource exhaustion).",
    "serialargs_alloc_get_one_attribute forwards head.size from reader data to alloc_and_get without an explicit semantic bound check."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "ADD_OVERFLOW prevents integer wrap when computing total allocation size",
      "serialargs_get_ptr validates availability of requested bytes",
      "TEE_Malloc checked before memory copies"
    ],
    "negative_indicators": [
      "No explicit upper bound on head.size (reader-controlled) beyond availability and overflow checks",
      "Source 'src' originates from REE-controlled buffer (requires careful handling elsewhere)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line-level sinks perform copies into TA-private memory with prior overflow and availability checks; therefore they are not classified as vulnerable for memory-safety or disclosure at these lines. Remaining risks are structural (unchecked semantic upper bounds/resource exhaustion) reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 48,
      "function": "alloc_and_get",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=remaining_bytes,dst_sz=sz"
        ]
      },
      "why": "Uses 'size' from reader-controlled input to allocate and copy without an explicit semantic upper bound (resource/exhaustion risk).",
      "code_excerpt": "if (ADD_OVERFLOW(buf0_sz, size, &sz))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Wrapped key bytes (TA-private secret) are written into params[2].memref.buffer (REE-visible) with out_size derived from caller-provided buffer size; this meets shared-memory overwrite criteria and is an information-disclosure risk at the wrap call site, not the alloc_and_get memmoves.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 119,
      "function": "serialargs_alloc_get_one_attribute",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=head.size,src_sz=orig_remaining_bytes,dst_sz=head.size"
        ]
      },
      "why": "Propagates head.size (from reader-controlled args) into alloc_and_get which uses it for allocation/copy without an explicit semantic upper bound.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &head, sizeof(head), &p, head.size);"
    }
  ]
}
フロー #147: TA_InvokeCommandEntryPoint -> entry_generate_secret -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 84.25秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

詳細: Both TEE_MemMove calls copy into TA-private heap with allocation and overflow checks; no evidence of copying TA secrets to REE or heap overflow at these lines, so not a direct vulnerability.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) check and computed sum",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-71"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW checked and returns error on overflow"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58,60-64",
        "evidence": "checks return of serialargs_get_ptr and checks TEE_Malloc result, restores args->next on alloc failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "args originates from serialargs structure built over caller-provided buffer (REE-visible); callee reads from args->next which may reference REE memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "orig_next is saved pointer into args->next (derived from caller buffer) and used to restore state on failure; origin likely REE-visible",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "buf0 (&attr) is caller stack data (TEE-private) copied into newly allocated buffer via TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "out parameter (&p) binds callee-allocated pointer back to caller local 'p' (TEE-private binding)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "ptr",
      "buf0",
      "src (serialargs_get_ptr result)",
      "buf",
      "data",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "ptr (TEE_Malloc result) passed as first arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "src",
        "rhs": "buf0 (&attr) passed as second arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "dest",
        "rhs": "ptr + buf0_sz passed as first arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "src",
        "rhs": "src (from serialargs_get_ptr) passed as second arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "dest",
        "rhs": "buf + *blen passed as first arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "src",
        "rhs": "data passed as second arg",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies buf0 (&attr, TEE-private) into malloc'd ptr (TEE-private) via TEE_MemMove; both source and dest are TA-private but size arithmetic influences allocation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data from src (derived from serialargs -> REE-visible) into TA-allocated buffer (ptr + offset), bringing REE-origin data into TA memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies data (unknown origin, likely REE-visible) into buffer at buf + *blen; destination offset uses *blen (tainted/unchecked index risk)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies local buf0 (&attr) (TA-private) into TA-allocated memory; sizes are included in allocation sum (ADD_OVERFLOW) and allocation checked, so no overflow or REE exfiltration on this line.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies src (data read from serialargs, originating from REE-visible buffer) into TA-allocated memory; destination is TEE-private so not an unencrypted REE output and allocation/size checks prevent overflow.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params (ctrl->memref.buffer) in REE",
      "propagation_path": [
        "params[0/2] -> serialargs_init / ctrlargs <- processing.c:226",
        "serialargs_get_ptr -> alloc_and_get src parameter (serializer.c:56)",
        "TEE_MemMove(ptr + buf0_sz, src, size) (serializer.c:67)"
      ],
      "sink": "TEE_MemMove into TA-allocated buffer (serializer.c:67)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls REE-provided serialargs buffer contents",
        "No prior integrity/auth checks of serialargs payload"
      ],
      "attack_scenario": "Attacker supplies crafted serialargs payload; data is copied into TA heap but not written back to REE by these calls.",
      "impact": "Potentially influences TA state; does not directly leak TA secrets or overwrite REE memory at these lines."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "alloc_and_get:48-56",
        "recommendation": "Validate that 'size' and buf0_sz are within expected semantic limits and that src provenance/format is checked before use."
      },
      {
        "type": "mem_access_check",
        "location": "alloc_and_get:60-67",
        "recommendation": "After allocation, consider explicit sanity checks on expected combined size before TEE_MemMove to reduce risk of logic errors."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW checked (serializer.c:48-49)",
        "serialargs_get_ptr return checked before use (serializer.c:56-58)",
        "TEE_Malloc result checked and args->next restored on failure (serializer.c:60-64)"
      ],
      "negative_indicators": [
        "src originates from REE-visible buffer (serialargs) which is untrusted"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Both TEE_MemMove calls copy into TA-private heap with allocation and overflow checks; no evidence of copying TA secrets to REE or heap overflow at these lines, so not a direct vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Destinations are TA-private and sizes/allocations are validated, preventing overflow and REE exfiltration at these lines.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked and returns error on overflow"
    },
    {
      "type": "null_check",
      "location": "alloc_and_get:56-64",
      "evidence": "serialargs_get_ptr return checked; TEE_Malloc result checked and args->next restored on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0 / buf0_sz",
      "why_safe": "buf0 is local attr structure copied; size accounted in allocation",
      "evidence": "serializer.c:66 and alloc_and_get handles buf0_sz in sz computation"
    },
    {
      "arg": "src / size",
      "why_safe": "src is obtained via serialargs_get_ptr which is checked; size used in allocation sum and checked for overflow",
      "evidence": "serializer.c:56-60 and 48-49"
    }
  ],
  "residual_risks": [
    "Line 67: REE-origin data is copied into TA heap (trusted region); downstream uses of that data could lead to vulnerabilities if not validated."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ADD_OVERFLOW and allocation checks",
      "checks on serialargs_get_ptr return"
    ],
    "negative_indicators": [
      "source provenance from REE (untrusted) means downstream validation is necessary"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (overflow and allocation) and TA-private destinations prevent both overflow and unencrypted REE output at the evaluated TEE_MemMove calls; remaining risk is structural (untrusted input into TA memory).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "why": "Copies REE-provided serialargs bytes into TA heap; source is untrusted and may require validation before use elsewhere.",
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "why": "Copies local attr structure into allocated buffer; safe but size contributes to allocation arithmetic.",
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    }
  ]
}
フロー #148: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 96.43秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks (ADD_OVERFLOW) and allocation bound the TEE_MemMove copies; sources are REE-controlled but copied into TEE-private heap, so no unencrypted REE output occurs on these lines.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) check then sz = buf0_sz + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (first region)",
        "rhs": "buf0 (buf0_sz) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr (second region)",
        "rhs": "src (size bytes) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "*out",
        "rhs": "ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-71"
      }
    ],
    "sanitizers": [
      {
        "kind": "integer_overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents buf0_sz+size overflow"
      },
      {
        "kind": "zero_length_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:51-54",
        "evidence": "if (!sz) returns OK and sets *out = NULL"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64",
        "evidence": "TEE_Malloc failure resets args->next and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 425,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "alias of serialargs object (ctrlargs) originating from REE memref buffer passed as args into alloc_and_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 425,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "orig_next (pointer into REE-controlled args->next) passed into alloc_and_get as orig_next alias",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 425,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "buf0 points to attr read from REE-controlled serialargs and is forwarded into alloc_and_get (copied into heap)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "size (attr.attrs_size) from REE-derived attr is used to request src via serialargs_get_ptr without additional validation of magnitude",
      "sink_function": "serialargs_get_ptr",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Copies buf0 (from REE-derived attr) into newly allocated TEE heap via TEE_MemMove",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Copies src (from serialargs/REE) into allocated heap via TEE_MemMove; src originates from REE-controlled serialargs",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "ptr",
      "buf0",
      "buf0_sz",
      "src",
      "size",
      "buf",
      "*blen",
      "data",
      "len"
    ],
    "propagation": [
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr + buf0_sz",
        "rhs": "pointer arithmetic from ptr and buf0_sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "buffer plus dynamic offset used as destination",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "integer_overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents buf0_sz+size overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination ptr is allocated in TEE heap (TEE_Malloc) while source buf0 originates from REE-derived attr; binding of dest pointer is an alias of TEE-private heap",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source buf0 was populated from serialargs (REE-controlled); binding records origin as REE-visible",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination ptr+buf0_sz is derived from TEE-allocated ptr via pointer arithmetic (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source src is obtained from serialargs_get_ptr (REE-controlled) and then copied into heap",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination buf + *blen uses dynamic offset; origin/region of buf not established here (unknown)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source data passed into TEE_MemMove likely originates from serialargs/REE at call-site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination was allocated with size sz = buf0_sz + size after ADD_OVERFLOW check; copy length buf0_sz is bounded by allocated sz and source originates from previously-read attr buffer.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination ptr+buf0_sz lies within allocated sz and sz was computed with overflow check; serialargs_get_ptr retrieves src of requested size before copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided serialargs buffer (args->next, attr.attrs_size)",
      "propagation_path": [
        "serialargs_get -> attr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136",
        "alloc_and_get called with buf0=&attr, buf0_sz=sizeof(attr), size=attr.attrs_size @ serializer.c:140",
        "serialargs_get_ptr(args, &src, size) reads src from REE @ serializer.c:56",
        "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr+buf0_sz, src, size) perform copies @ serializer.c:66-67"
      ],
      "sink": "TEE_MemMove copies into TEE-allocated heap"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed/large attr.attrs_size provided by REE",
        "serialargs_get_ptr returns a src pointer consistent with size"
      ],
      "attack_scenario": "Attacker supplies crafted serialargs so attr.attrs_size is large; however ADD_OVERFLOW and allocation of sz prevent integer overflow; if allocation succeeds, data is copied into TA heap (no direct REE leak from these lines).",
      "impact": "Potential memory/resource exhaustion if allocations are large; no direct memory safety or secret leakage at these lines."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "alloc_and_get:56",
        "recommendation": "Validate attr.attrs_size against an application-defined maximum before using it to allocate or read"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check present before allocation",
        "TEE_Malloc used to allocate exact combined size"
      ],
      "negative_indicators": [
        "attr.attrs_size originates from REE and is not range-checked against application limits",
        "serialargs_get_ptr behavior assumed but not shown here"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks (ADD_OVERFLOW) and allocation bound the TEE_MemMove copies; sources are REE-controlled but copied into TEE-private heap, so no unencrypted REE output occurs on these lines.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Copies are into TEE-allocated memory with integer-overflow protection and allocation sizing; no evidence of oversized write or REE-visible sink at these lines.",
  "effective_sanitizers": [
    {
      "type": "integer_overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents buf0_sz+size overflow"
    },
    {
      "type": "allocation_check",
      "location": "alloc_and_get:60-64",
      "evidence": "TEE_Malloc failure resets args->next and returns error"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0_sz",
      "why_safe": "Used as part of overflow-checked sum to allocate destination",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-66"
    },
    {
      "arg": "size (attr.attrs_size)",
      "why_safe": "Used in ADD_OVERFLOW and to read src; however requires additional range check",
      "evidence": "serializer.c:48-56"
    }
  ],
  "residual_risks": [
    "attr.attrs_size is REE-controlled and not range-limited -> possible large allocation/resource exhaustion",
    "serialargs_get_ptr correctness assumed; if it under-reads, later logic could misbehave"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ADD_OVERFLOW and TEE_Malloc usage",
      "no REE-visible destination at these lines"
    ],
    "negative_indicators": [
      "lack of explicit upper bound on attr.attrs_size",
      "serialargs_get_ptr validation not shown in provided context"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given integer-overflow protection and allocation sizing, the memmoves at lines 66 and 67 do not create a direct memory-safety vulnerability or unencrypted output to REE; structural weak-input-validation remains for upstream attr.attrs_size usage.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "attr.attrs_size (from REE-controlled serialargs) is used as a length without an application-level upper bound before allocation/read",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}
フロー #149: TA_InvokeCommandEntryPoint -> entry_create_object -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_create_objectserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 104.93秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-189

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided params buffer (params/ctrl->memref.buffer) containing serialized object head

シンク: TEE_MemMove(ptr + buf0_sz, src, size) copies unvalidated, input-derived length into TEE allocation

判定理由: Although integer-overflow and allocation-failure checks exist, the sink uses an unvalidated, attacker-controlled length (attr.attrs_size) to drive allocation and copying; this is weak input validation and can be abused for resource exhaustion or unexpected behavior, so line 67 is classified vulnerable (weak_input_validation) with medium confidence.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "src",
      "sz",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) computes total size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) reads 'size' bytes from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz) allocated buffer of computed sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) then TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to caller out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW prevents integer overflow when summing buf0_sz + size"
      },
      {
        "kind": "early_return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:51-54",
        "evidence": "handles zero total size by returning OK and setting *out = NULL"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58",
        "evidence": "checks return of serialargs_get_ptr before proceeding"
      },
      {
        "kind": "oom_recovery",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64",
        "evidence": "on malloc failure restores args->next and returns DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases caller serialargs which originates from REE-provided memref buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'orig_next' parameter derived from args->next (pointer into REE-originated buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'buf0' parameter is &attr (local) whose contents were filled from args (REE-origin); effective source may be REE-visible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Uses 'size' (derived from attr.attrs_size, which originates from untrusted input) to read and then to allocate and copy without further validation of reasonable bounds here.",
      "sink_function": "serialargs_get_ptr",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 60,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Allocates 'sz' = buf0_sz + size (size controlled by input) and copies both buf0 and src into the allocation; large size may lead to resource exhaustion or unexpected behavior.",
      "sink_function": "TEE_Malloc",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=buf0_sz+size,dst_sz=sz"
        ]
      },
      "code_excerpt": "ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Copies data from buf0 and src into a TEE-allocated buffer using sizes that include input-derived 'size'; destination is TEE-private but source is REE-originated.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz+size,src_sz=buf0_sz and size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);\nTEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest (ptr or ptr+buf0_sz)",
      "src (buf0 or src)",
      "buf0",
      "buf0_sz",
      "size"
    ],
    "propagation": [
      {
        "lhs": "dest buffer (ptr)",
        "rhs": "TEE_Malloc(sz) allocated in alloc_and_get then passed as dest",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-66"
      },
      {
        "lhs": "src (buf0)",
        "rhs": "&attr (local) which was populated from args via serialargs_get",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136-140"
      },
      {
        "lhs": "src (src)",
        "rhs": "pointer returned by serialargs_get_ptr reading 'size' bytes from args->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-57"
      },
      {
        "lhs": "copy operations",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size) perform copies using sizes buf0_sz and size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW prevents integer overflow when summing buf0_sz + size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr' is TEE-allocated buffer (TEE-private) returned to caller; alias established at alloc_and_get.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'buf0' originates from local 'attr' populated from args (which come from REE); treat as potentially REE-derived.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'ptr + buf0_sz' (offset into TEE-allocated buffer) aliases the same TEE-private allocation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'size' bytes from 'src' (read from args) into dest; 'size' is input-derived (attr.attrs_size) and lacks additional validation here.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies fixed-size buf0 (buf0_sz == sizeof(attr)) into freshly allocated TEE buffer; buf0_sz is a compile-time size and ADD_OVERFLOW prevents integer overflow for allocation.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'size' bytes (derived from attr.attrs_size, i.e., REE-provided) into allocation; while integer-add overflow is checked, attrs_size is unvalidated upper-bound allowing large/abusive allocations and unchecked input-driven copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-189",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided params buffer (params/ctrl->memref.buffer) containing serialized object head",
      "propagation_path": [
        "params[0/ctrl].memref.buffer -> serialargs_init/serialargs_get @ object.c:325/serializer.c:136",
        "attr.attrs_size read into attr.attrs_size @ serializer.c:136",
        "attr.attrs_size passed as 'size' into alloc_and_get @ serializer.c:140",
        "serialargs_get_ptr reads 'size' bytes into src @ serializer.c:56",
        "TEE_MemMove(ptr + buf0_sz, src, size) performs copy @ serializer.c:67"
      ],
      "sink": "TEE_MemMove(ptr + buf0_sz, src, size) copies unvalidated, input-derived length into TEE allocation"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted params memref with attr.attrs_size set to a large or unexpected value",
        "TA processes the serialized args and reaches alloc_and_get"
      ],
      "attack_scenario": "Attacker sets attrs_size very large to cause excessive memory allocation attempts, OOM conditions, or trigger resource exhaustion; in some environments this may lead to denial-of-service or failure paths that revert state unpredictably.",
      "impact": "Denial-of-service via resource exhaustion; depending on allocator behavior could lead to degraded TA operation or error paths."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "alloc_and_get:48-68",
        "recommendation": "Validate attr.attrs_size against an application-specific maximum and reject unreasonable sizes before allocation and copy."
      },
      {
        "type": "range_check",
        "location": "serialargs_alloc_get_attributes:140",
        "recommendation": "Verify attrs_size is within expected semantic limits for attributes before delegating to alloc_and_get."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size parameter originates from attr.attrs_size read from serialized REE input",
        "serial path performs copy using that size at the sink (TEE_MemMove ptr+offset, src, size)",
        "no high-level semantic bound check of attrs_size before allocation/copy"
      ],
      "negative_indicators": [
        "ADD_OVERFLOW prevents integer overflow in size addition",
        "serialargs_get_ptr and TEE_Malloc return errors which are handled (reduces risk of memory corruption)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Although integer-overflow and allocation-failure checks exist, the sink uses an unvalidated, attacker-controlled length (attr.attrs_size) to drive allocation and copying; this is weak input validation and can be abused for resource exhaustion or unexpected behavior, so line 67 is classified vulnerable (weak_input_validation) with medium confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 67,
        "function": "alloc_and_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies 'size' bytes from REE-derived src into allocated buffer; 'size' (attr.attrs_size) lacks application-level bounds validation."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents integer overflow when computing total allocation size"
    },
    {
      "type": "error_check",
      "location": "alloc_and_get:56-58",
      "evidence": "serialargs_get_ptr return is checked and failure aborts"
    },
    {
      "type": "oom_recovery",
      "location": "alloc_and_get:60-64",
      "evidence": "TEE_Malloc failure restores args->next and returns error"
    },
    {
      "type": "type_validation",
      "location": "entry_create_object:321-323",
      "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0_sz",
      "why_safe": "Fixed-size (sizeof(attr)) provided by caller; not attacker-controlled at call-site",
      "evidence": "alloc_and_get call at serializer.c:140 uses sizeof(attr)"
    },
    {
      "arg": "size",
      "why_safe": "Checked for integer overflow when combined with buf0_sz but otherwise unvalidated upper bound",
      "evidence": "ADD_OVERFLOW at serializer.c:48; no application-level max bound"
    },
    {
      "arg": "args / orig_next",
      "why_safe": "serialargs_get_ptr validates availability and returns error if insufficient bytes",
      "evidence": "serialargs_get_ptr call checked at serializer.c:56-58"
    }
  ],
  "residual_risks": [
    "line 67: potential denial-of-service/resource exhaustion from large attrs_size (weak_input_validation) despite overflow check",
    "possible downstream exposure if TA later copies created/allocated data back to REE (not on these sink lines)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "direct use of untrusted attr.attrs_size at allocation+copy sink",
      "propagation chain from REE buffer to sink is clear"
    ],
    "negative_indicators": [
      "overflow check and allocation failure handling reduce risk of memory corruption"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 67 is vulnerable due to weak input validation of an attacker-controlled length used in allocation and copy; protections exist but do not address excessive or semantically invalid sizes, so classify as medium-severity weak_input_validation. Line 66 is safe because it copies a fixed, compile-time-sized struct portion into the allocation.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "attr.attrs_size (from REE) is used to control allocation and copying without semantic upper bounds validation.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local obj_handle into caller-provided REE-visible out->memref.buffer via TEE_MemMove; structural binding of shared output.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #150: TA_InvokeCommandEntryPoint -> entry_find_objects_init -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objects_initserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 82.93秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks (overflow check, serialargs_get_ptr availability check, and malloc-size check) prevent classic overflow/over-read at these TEE_MemMove calls; data copied from REE goes into TA-private memory (no REE exfiltration), so no vulnerability per policy.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "*out",
        "rhs": "ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) returns error on overflow"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58",
        "evidence": "serialargs_get_ptr returns error if requested 'size' bytes not available"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases caller ctrlargs which wraps caller-provided memref.buffer (shared REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'orig_next' parameter is derived from args->next which points into caller's serialized buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=remaining_serialized_bytes,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'buf0' parameter (&attr) is caller-local stack data (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter (&p) binds to caller-local 'p' (destination pointer in caller, TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 48,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Uses 'size' (attr.attrs_size) from untrusted serialized input to compute allocation and drive copy; attacker-controlled size may affect allocation and copies despite overflow check.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size+buf0_sz,src_sz=orig_next_remaining,dst_sz=sz"
        ]
      },
      "code_excerpt": "if (ADD_OVERFLOW(buf0_sz, size, &sz))\n    return PKCS11_CKR_ARGUMENTS_BAD;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Performs TEE_MemMove from 'src' (data read from serialargs -> likely REE-provided) into TEE_Malloc'd buffer; copying attacker-controlled bytes into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_next_remaining,dst_sz=sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "ptr",
      "buf0",
      "buf0_sz",
      "size",
      "args->next",
      "orig_next"
    ],
    "propagation": [
      {
        "lhs": "dst (ptr)",
        "rhs": "TEE_Malloc(sz) returned pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-66"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "len (size or buf0_sz)",
        "rhs": "caller-provided attr.attrs_size or sizeof(attr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:40-41,136-141"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) returns error on overflow"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58",
        "evidence": "serialargs_get_ptr returns error if requested 'size' bytes not available"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'ptr' is TA-private (TEE_Malloc) and is written from 'buf0' which is caller-local (TA-private); copy of non-REE data into TA memory.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 'src' (data read from serialargs -> likely REE-provided) into TA-private buffer using attacker-influenced 'size' (attr.attrs_size).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=orig_next_remaining,dst_sz=sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination buffer ('buf + *blen') and source ('data') origins depend on caller; potential REE->TA copy depending on caller.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=buffer_capacity - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies caller-local buf0 (TA-private stack) into newly TEE_Malloc'd TA buffer; source is not REE-visible and prior overflow check prevents size wrap.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies data read from serialargs (likely REE-provided) into TA-private buffer using attacker-influenced 'size', but ADD_OVERFLOW and serialargs_get_ptr/TEE_Malloc limit overflow/under-read risk; does not send secrets to REE.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer -> serialargs -> serialargs_get_ptr",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init/ctrlargs (object.c:511)",
        "serialargs_get_ptr -> src (serializer.c:56-58)",
        "TEE_MemMove(ptr + buf0_sz, src, size) (serializer.c:67)"
      ],
      "sink": "TEE_MemMove into TEE_Malloc'd buffer (serializer.c:67)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls serialized input in params[0].memref.buffer",
        "attr.attrs_size contains attacker-provided size value within checked bounds"
      ],
      "attack_scenario": "Malformed serialized attrs could request large size, but ADD_OVERFLOW and serialargs_get_ptr/TEE_Malloc mitigate overflow; exploitation to cause overflow unlikely.",
      "impact": "Possible allocation of large TA memory or denial-of-service via memory exhaustion if platform allows large allocation requests."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "alloc_and_get:48-61",
        "recommendation": "Enforce an explicit upper bound on 'size' (attr.attrs_size) before allocation to prevent excessive memory allocation or resource exhaustion."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_get_ptr returns error if requested 'size' not available (serializer.c:56-58)",
        "ADD_OVERFLOW prevents integer wrap when computing total sz (serializer.c:48-49)",
        "TEE_Malloc result checked before use (serializer.c:60-64)"
      ],
      "negative_indicators": [
        "attr.attrs_size originates from untrusted serialized input and is used directly for allocation/copy (serializer.c:140)",
        "no explicit application-level upper bound on attrs_size"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety checks (overflow check, serialargs_get_ptr availability check, and malloc-size check) prevent classic overflow/over-read at these TEE_MemMove calls; data copied from REE goes into TA-private memory (no REE exfiltration), so no vulnerability per policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Size/overflow checks and availability checks prevent buffer overflow, and the copies target TA-private buffers (no REE-visible destination), so neither memory-safety nor unencrypted-output conditions are met.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) returns error on overflow"
    },
    {
      "type": "bounds_check",
      "location": "alloc_and_get:56-58",
      "evidence": "serialargs_get_ptr returns error if requested 'size' bytes not available"
    },
    {
      "type": "mem_access_check",
      "location": "alloc_and_get:60-64",
      "evidence": "TEE_Malloc checked for NULL before use"
    }
  ],
  "argument_safety": [
    {
      "arg": "args / ctrl->memref.buffer",
      "why_safe": "serialargs_get and serialargs_get_ptr validate availability before access",
      "evidence": "serializer.c:136-138,56-58"
    },
    {
      "arg": "attr.attrs_size",
      "why_safe": "checked for overflow when summing into allocation size but lacks explicit application upper bound",
      "evidence": "serializer.c:48-49,140"
    }
  ],
  "residual_risks": [
    "line 67: attr.attrs_size is attacker-controlled; while overflow and availability checks exist, lack of an explicit upper bound permits large allocations (resource exhaustion/DoS)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "direct checks present (ADD_OVERFLOW, serialargs_get_ptr, malloc NULL check)",
      "destinations are TA-private (TEE_Malloc) not REE-visible"
    ],
    "negative_indicators": [
      "attr.attrs_size originates from untrusted input and used directly",
      "no application-level max size constraint"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No exploitable memory-safety issue at the two TEE_MemMove calls due to integer-overflow check and availability checks; no sensitive TA-private data is written to REE, so unencrypted_output conditions are not met. The remaining structural risk is possible large allocation from unbounded attr.attrs_size (DoS).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "alloc_and_get",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size+buf0_sz,src_sz=orig_next_remaining,dst_sz=sz"
        ]
      },
      "why": "Uses attr.attrs_size derived from untrusted serialized input to compute allocation and copies; lacks explicit upper bound to limit allocation size.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}
フロー #151: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_attribute_valueserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 86.00秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

詳細: Both TEE_MemMove calls copy into TA-private allocation with prior overflow/return checks; they do not write to REE-visible memory and thus do not meet criteria for unencrypted_output or a bounds-overflow vulnerability at these lines.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "src",
      "ptr",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) check and assignment",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) and TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-68"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked and returns error on overflow"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:51-54",
        "evidence": "handles zero-size by setting *out = NULL"
      },
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58,60-64",
        "evidence": "rc checked after serialargs_get_ptr and malloc; restores args->next on malloc failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 777,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Binding: 'args' originates from &ctrlargs which wraps REE-provided memref buffer; underlying pointers may reference REE-visible memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=sizeof(struct serialargs)"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Binding: 'orig_next' saved from args->next may point into REE-provided buffer; used to restore state on error.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(char *)"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Binding: 'buf0' (address of local 'attr' in caller) is passed as source buffer; origin is TA-local stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Binding: 'out' (address of local pointer p) is passed to receive allocated TA memory pointer; destination remains TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=sizeof(void **)"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "ptr",
      "buf0",
      "buf0_sz",
      "src",
      "size",
      "buf",
      "blen",
      "data",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst(ptr)",
        "rhs": "TEE_Malloc(...) -> ptr (allocated TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-61"
      },
      {
        "lhs": "src(buf0)",
        "rhs": "buf0 passed from caller (e.g., &attr -> TA-local stack)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "src(src)",
        "rhs": "serialargs_get_ptr(args, &src, size) -> may point into REE-provided buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-57,67"
      },
      {
        "lhs": "dst(buf + *blen)",
        "rhs": "buf (caller buffer) plus offset *blen",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked"
      },
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58,60-64",
        "evidence": "serialargs_get_ptr rc checked and malloc failure handled"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest ptr is TA-allocated (TEE-private) and source buf0 is TA-local (&attr); copying buf0 into allocated region.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Dest ptr+buf0_sz is TA-allocated; source 'src' is obtained from serialargs_get_ptr and may point into REE-visible memory (shared).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz-buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination buf + *blen may be REE-visible or shared; source 'data' origin unknown (likely from serialargs) and length 'len' is caller-controlled.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=(*blen)+len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination ptr (returned via *out) is TA-private pointer assigned to caller; records allocation origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=sizeof(void *)"
        ]
      },
      "code_excerpt": "*out = ptr;"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies buf0 (caller-provided buf0 is &attr, TA-local) into TA-allocated memory; source and destination are TA-private and overflow/size sum is checked beforehand.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies 'src' (obtained from serialargs_get_ptr, which may reference REE-visible bytes) into TA-allocated memory (TA-private); this is REE->TA copy, not an REE-facing output, and prior size/overflow checks exist.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided memref bytes (via serialargs/ctrlargs)",
      "propagation_path": [
        "params (TEE_Param) -> ctrlargs -> serialargs_get_ptr -> src @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-57",
        "src -> TEE_MemMove(ptr + buf0_sz, src, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      ],
      "sink": "TEE_MemMove into TA-private allocation (alloc_and_get)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious or crafted REE-provided serial data referencing controlled bytes",
        "no additional post-copy exposure to REE"
      ],
      "attack_scenario": "Attacker supplies REE-side data that is copied into TA memory; without further flaws this yields TA memory modification but not direct REE exfiltration at these lines.",
      "impact": "Potentially influence TA state or cause logic issues, but not direct sensitive data leakage to REE at these sink lines."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "alloc_and_get:66-67",
        "recommendation": "Ensure serialargs_get_ptr returns source pointers constrained to expected ranges and validate 'size' against expected maxima before copying."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check for combined size at /serializer.c:48-49",
        "serialargs_get_ptr return is checked at /serializer.c:56-58",
        "malloc failure handling restores args->next"
      ],
      "negative_indicators": [
        "src from serialargs_get_ptr may point into REE-visible shared memory (caller-controlled)",
        "no explicit validation here that 'size' is bounded by a known safe maximum beyond overflow check"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Both TEE_MemMove calls copy into TA-private allocation with prior overflow/return checks; they do not write to REE-visible memory and thus do not meet criteria for unencrypted_output or a bounds-overflow vulnerability at these lines.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The two TEE_MemMove calls copy into TA-private memory with overflow and return checks; they do not write to REE-visible buffers and no unchecked size > dst evidence exists at these lines.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked"
    },
    {
      "type": "return_check",
      "location": "alloc_and_get:56-58",
      "evidence": "rc checked after serialargs_get_ptr"
    },
    {
      "type": "return_check",
      "location": "alloc_and_get:60-64",
      "evidence": "malloc failure handled and args->next restored"
    }
  ],
  "argument_safety": [
    {
      "arg": "buf0",
      "why_safe": "buf0 is &attr (TA-local) in caller",
      "evidence": "/serializer.c:66 and caller alloc_and_get callsite"
    },
    {
      "arg": "src",
      "why_safe": "serialargs_get_ptr validates presence and returns rc which is checked; however origin may be REE-visible",
      "evidence": "/serializer.c:56-58"
    }
  ],
  "residual_risks": [
    "object.c:910 copies template (which may contain sensitive attributes) into out->memref.buffer (REE-visible) — potential information exposure upstream of these sinks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ADD_OVERFLOW and rc checks",
      "malloc failure handling"
    ],
    "negative_indicators": [
      "source pointer 'src' may be REE-visible and caller code later copies TA data to REE (object.c:910)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety checks (overflow and return checks) prevent obvious over-read/overflow at these TEE_MemMove calls; both copy into TA-private allocations, so they are not direct REE-facing leaks. Structural risk of later copy to REE remains.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-side 'template' (attributes) into REE-visible out->memref.buffer; may expose sensitive attributes flagged earlier.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    }
  ]
}
フロー #152: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valueserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 73.78秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

詳細: Memory-safety protections (ADD_OVERFLOW and serialargs_get_ptr) bound the copy lengths; destination is TEE-private so no unencrypted REE output; thus not a vulnerability under given policy.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) check and calculation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-68"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-71"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW detects overflow of buf0_sz + size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1002,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "caller-provided serialargs pointer (args) originates from REE-visible memref buffer and is passed into alloc_and_get",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=ctrl->memref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "orig_next is alias of args->next which points into caller-provided buffer (REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=ctrl->memref.size,dst_sz=NA"
        ]
      },
      "code_excerpt": "char *orig_next = args->next;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 39,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "buf0 is a pointer to a local stack structure (&attr) from caller (TEE-private) passed here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "out parameter is bound to caller local (p) and returns allocated pointer into caller context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=NA,dst_sz=sz"
        ]
      },
      "code_excerpt": "*out = ptr;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "size (from upstream attr.attrs_size via serialargs) is used to read from REE (serialargs_get_ptr) and drive copies without additional validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "ptr",
      "buf0",
      "buf0_sz",
      "src",
      "size",
      "buf",
      "blen",
      "data",
      "len"
    ],
    "propagation": [
      {
        "lhs": "ptr (dst buffer contents)",
        "rhs": "buf0 (source) copied into ptr via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66"
      },
      {
        "lhs": "ptr + buf0_sz (dst offset)",
        "rhs": "src (source) copied into ptr+buf0_sz via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:67"
      },
      {
        "lhs": "buf + *blen (dst buffer contents)",
        "rhs": "data (source) copied into buf+*blen via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) detected overflow before allocation in caller"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "buf0 (source) is a TEE-private/local stack struct pointer (&attr) passed into memmove as source; dst ptr is TEE-allocated private memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "src is derived from REE-visible serialargs_get_ptr and size (from upstream attr.attrs_size) controls the copy into TEE memory without local validation here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "data (likely from REE) is copied into buf+*blen using len without shown bounds check here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: dst pointer 'ptr' is returned via out parameter to caller (TEE-private) - alias recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz+size,src_sz=buf0_sz+size,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz); TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies local buf0 (caller-side stack &attr) into freshly TEE-allocated ptr of size sz where sz was computed from buf0_sz+size and allocation is checked; source is TEE-private, not REE.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies src (read via serialargs_get_ptr from REE) into allocated buffer; ADD_OVERFLOW prevented allocation overflow and serialargs_get_ptr returns error on insufficient input, so copy length is bounded by prior checks.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params->memref.buffer (REE-visible) -> serialargs_get_ptr",
      "propagation_path": [
        "params->memref.buffer -> serialargs_init/ctrlargs (object.c:992)",
        "serialargs_get_ptr reads src from ctrlargs (serializer.c:56)",
        "alloc_and_get copies src into TEE buffer via TEE_MemMove (serializer.c:67)"
      ],
      "sink": "TEE_MemMove(ptr + buf0_sz, src, size) (serializer.c:67)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious REE supplies crafted params->memref.buffer and attr.attrs_size",
        "no prior checks inside serialargs_* would have aborted"
      ],
      "attack_scenario": "Crafted input could try to drive wrong sizes, but ADD_OVERFLOW and serialargs_get_ptr checks prevent allocation overflow and out-of-bounds reads.",
      "impact": "If checks were absent, could cause memory corruption; given present checks, impact is mitigated."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialargs_alloc_get_attributes:140|serializer.c",
        "recommendation": "Explicitly validate attr.attrs_size against remaining args buffer and an upper logical limit before using as allocation/copy length."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check before allocation (serializer.c:48-49)",
        "serialargs_get_ptr returns error on insufficient input (serializer.c:56-58)"
      ],
      "negative_indicators": [
        "attr.attrs_size originates from REE and validation here is indirect (rely on serialargs_* behavior)",
        "no explicit upper bound check on attrs_size within alloc_and_get"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety protections (ADD_OVERFLOW and serialargs_get_ptr) bound the copy lengths; destination is TEE-private so no unencrypted REE output; thus not a vulnerability under given policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Prior overflow detection and input-reading functions enforce bounds, and the destinations are TEE-private, so the TEE_MemMove calls do not create an exploitable leak or overflow in the observed context.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "alloc_and_get:48-49|serializer.c",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) prevents allocation size overflow"
    },
    {
      "type": "bounds_check",
      "location": "alloc_and_get:56-58|serializer.c",
      "evidence": "serialargs_get_ptr(args, &src, size) returns error if insufficient input"
    }
  ],
  "argument_safety": [
    {
      "arg": "args / ctrl->memref.buffer",
      "why_safe": "Reads from REE are validated by serialargs_get_ptr and earlier checks in serialargs_*",
      "evidence": "object.c:992, serializer.c:56-58"
    },
    {
      "arg": "sz (allocation size)",
      "why_safe": "Computed via ADD_OVERFLOW and allocation only proceeds if no overflow",
      "evidence": "serializer.c:48-61"
    }
  ],
  "residual_risks": [
    "attr.attrs_size is derived from REE data; lack of an explicit upper application-level cap may allow large allocations or resource exhaustion",
    "analysis assumes serialargs_get_ptr robustly enforces bounds; if its implementation is flawed, risk remains"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Presence of ADD_OVERFLOW and serialargs_get_ptr error returns",
      "TEE_Malloc checked for NULL and handled"
    ],
    "negative_indicators": [
      "attr.attrs_size originates from untrusted REE buffer and is not explicitly range-limited here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given explicit overflow detection and input-read guards, and that copies target TEE-private allocated memory, the TEE_MemMove invocations at lines 66 and 67 are not classified as vulnerabilities under the stated policy; structural concerns about unvalidated attrs_size are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "attr.attrs_size is taken from REE-derived header and used as allocation/copy length without an explicit application-level upper bound at this call site.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}
フロー #153: TA_InvokeCommandEntryPoint -> entry_copy_object -> serialargs_alloc_get_attributes -> alloc_and_get -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectserialargs_alloc_get_attributesalloc_and_getTEE_MemMove

実行時間: 91.48秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66, 67

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided ctrl->memref.buffer (serialargs bytes)

シンク: TEE_MemMove at serializer.c:67 copying REE-controlled bytes into TA memory

判定理由: The copy at line 67 uses a size value derived from REE-controlled data (attr.attrs_size) with no explicit upper-bound enforcement at that program point; although some checks exist (ADD_OVERFLOW, serialargs_get_ptr failure), they do not prove a sufficient sanitizer for arbitrary attrs_size, so this is classified as weak_input_validation vulnerability.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: alloc_and_get
プロンプト 中間 (alloc_and_get)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_and_get” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialargs_alloc_get_attributes at lines [140]:
-- Call #1 at line 140 --
138: return rc;
139:
140: >>> rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p,
141: attr.attrs_size);
142: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

39: static enum pkcs11_rc alloc_and_get(struct serialargs *args, char *orig_next,
40: const void *buf0, size_t buf0_sz,
41: void **out, size_t size)
42: { 43: enum pkcs11_rc rc = PKCS11_CKR_OK; 44: uint8_t *ptr = NULL; 45: void *src = NULL; 46: size_t sz = 0; 47: 48: if (ADD_OVERFLOW(buf0_sz, size, &sz)) 49: return PKCS11_CKR_ARGUMENTS_BAD; 50: 51: if (!sz) { 52: *out = NULL; 53: return PKCS11_CKR_OK; 54: } 55: 56: rc = serialargs_get_ptr(args, &src, size); 57: if (rc) 58: return rc; 59: 60: ptr = TEE_Malloc(sz, TEE_MALLOC_FILL_ZERO); 61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: } 65: 66: TEE_MemMove(ptr, buf0, buf0_sz); 67: TEE_MemMove(ptr + buf0_sz, src, size); 68: 69: *out = ptr; 70: 71: return PKCS11_CKR_OK; 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_and_get", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_and_get", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_and_get)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_and_get",
    "tainted_vars": [
      "args",
      "orig_next",
      "buf0",
      "buf0_sz",
      "out",
      "size",
      "sz",
      "src",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "ADD_OVERFLOW(buf0_sz, size, &sz) computes combined size from buf0_sz and size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49"
      },
      {
        "lhs": "src",
        "rhs": "serialargs_get_ptr(args, &src, size) reads 'size' bytes from args->next (caller-controlled)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...) allocates destination buffer of computed sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64"
      },
      {
        "lhs": "ptr (contents)",
        "rhs": "TEE_MemMove(ptr, buf0, buf0_sz) then TEE_MemMove(ptr + buf0_sz, src, size) copies buf0 (local) and src (from args) into ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-68"
      },
      {
        "lhs": "*out",
        "rhs": "ptr assigned to *out",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:69-70"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:48-49",
        "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked and returns error if overflow"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:60-64",
        "evidence": "checks TEE_Malloc return and restores args->next on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'args' parameter aliases ctrlargs which references REE-provided ctrl->memref.buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct serialargs),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'orig_next' parameter is pointer into ctrlargs->next (points into REE buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'buf0' parameter is &attr (local stack struct) passed as source for initial header copy",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1118,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Call-site binding: callee 'out' parameter is &p (caller-local pointer to receive allocated buffer)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "rule": "weak_input_validation",
      "why": "Reads 'size' bytes from args->next via serialargs_get_ptr where 'size' is caller-controlled (attr.attrs_size) with no explicit upper-bound check here",
      "sink_function": "serialargs_get_ptr",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "alloc_and_get",
      "rule": "other",
      "why": "Copies REE-provided 'src' into newly allocated TA-private buffer via TEE_MemMove; destination is TA-private but data originates from REE",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_and_get at lines [66, 67, 188]:
-- Call #1 at line 66 --
64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: TEE_MemMove(ptr + buf0_sz, src, size);
68:
-- Call #2 at line 67 --
65:
66: TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
-- Call #3 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at lines [66, 67]:
61: if (!ptr) { 62: args->next = orig_next; 63: return PKCS11_CKR_DEVICE_MEMORY; 64: }
65:
66: >>> TEE_MemMove(ptr, buf0, buf0_sz);
67: >>> TEE_MemMove(ptr + buf0_sz, src, size);
68:
69: *out = ptr;
70:
71: return PKCS11_CKR_OK;
72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src copied into dst via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:66-67,188"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 66,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local header buf0 (TA-private) into allocated TA-private buffer ptr; simple TA->TA move of non-REE data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=buf0_sz,src_sz=buf0_sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, buf0, buf0_sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 67,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'src' (read from args->next, REE-controlled) into TA-private ptr at offset; data originates from REE",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=sz - buf0_sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr + buf0_sz, src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies 'data' into buffer at buf + *blen (possible append); origin of 'data' and bounds of buf depend on caller and are uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=unknown - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [66, 67]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [66, 67] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      66,
      67
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 66,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies buf0 (TA-private local struct) into TA-allocated buffer; source is TA-private and prior ADD_OVERFLOW check ensures allocation size was computed safely.",
      "rule_id": "other"
    },
    {
      "line": 67,
      "function": "alloc_and_get",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies 'src' read from args->next (REE-controlled) into TA buffer using 'size' derived from attr.attrs_size with no explicit upper bound here beyond ADD_OVERFLOW; serialargs_get_ptr may fail but caller-controlled size flows to the copy.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided ctrl->memref.buffer (serialargs bytes)",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs (object.c:1108)",
        "serialargs_get -> attr (serializer.c:136)",
        "attr.attrs_size -> serialargs_alloc_get_attributes call (object.c:1118)",
        "attr.attrs_size passed as size into alloc_and_get (serializer.c:140)",
        "serialargs_get_ptr reads src from args->next using size (serializer.c:56)",
        "TEE_MemMove(ptr + buf0_sz, src, size) copies into TA buffer (serializer.c:67)"
      ],
      "sink": "TEE_MemMove at serializer.c:67 copying REE-controlled bytes into TA memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted ctrl memref from REE to TA_InvokeCommandEntryPoint params[0]/ctrl",
        "attr.attrs_size contains large or unexpected value not bounded by caller checks"
      ],
      "attack_scenario": "Maliciously large or malformed attr.attrs_size causes alloc_and_get to copy more bytes than intended or exhaust resources; if upper bounds assumptions elsewhere are violated, memory corruption or denial of service may follow.",
      "impact": "Potential memory-safety issues (out-of-bounds reads/overflows, resource exhaustion) leading to TA instability or further exploitability."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "alloc_and_get:48-68",
        "recommendation": "Validate attr.attrs_size against a conservative maximum and remaining args buffer before calling serialargs_get_ptr and before allocation; enforce upper bound on 'size'."
      },
      {
        "type": "range_check",
        "location": "serialargs_alloc_get_attributes:140",
        "recommendation": "Sanitize attr.attrs_size (from REE) with explicit maximum and reject unreasonable sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct use of REE-derived attr.attrs_size as 'size' argument to serialargs_get_ptr and TEE_MemMove",
        "Weak/absent explicit upper bound on attrs_size before allocation/copy"
      ],
      "negative_indicators": [
        "ADD_OVERFLOW check prevents simple integer wraparound when summing sizes",
        "serialargs_get_ptr and serialargs_get may return error if not enough bytes, providing some protection"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy at line 67 uses a size value derived from REE-controlled data (attr.attrs_size) with no explicit upper-bound enforcement at that program point; although some checks exist (ADD_OVERFLOW, serialargs_get_ptr failure), they do not prove a sufficient sanitizer for arbitrary attrs_size, so this is classified as weak_input_validation vulnerability.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
        "line": 67,
        "function": "alloc_and_get",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies REE-controlled 'src' (size = attr.attrs_size) into allocated buffer without explicit upper bound on attrs_size here."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "alloc_and_get:48-49",
      "evidence": "ADD_OVERFLOW(buf0_sz, size, &sz) checked and returns on overflow"
    },
    {
      "type": "null_check",
      "location": "alloc_and_get:60-64",
      "evidence": "checks TEE_Malloc return and restores args->next on failure"
    },
    {
      "type": "type_validation",
      "location": "serialargs_alloc_get_attributes:136-138",
      "evidence": "serialargs_get returns error on failure reading attr header"
    }
  ],
  "argument_safety": [
    {
      "arg": "args (ctrlargs)",
      "why_safe": "serialargs_get/serialargs_get_ptr perform length checks and return errors if insufficient data",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:56-58,136-138"
    },
    {
      "arg": "buf0 (attr)",
      "why_safe": "buf0 is local stack struct copied via known sizeof(attr)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:136,66"
    }
  ],
  "residual_risks": [
    "line 67: potential information-disclosure classification (unencrypted_output) not promoted because sink destination is TA-private; memory-safety concern prioritized"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct data flow from REE to TEE_MemMove at line 67",
      "attr.attrs_size used as copy length"
    ],
    "negative_indicators": [
      "ADD_OVERFLOW and serialargs_get_ptr error returns provide some defenses"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety weakness (weak input validation) at the TEE_MemMove call on line 67 is the primary concern because REE-controlled length is used for an in-TA copy; available checks reduce but do not eliminate the risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 56,
      "function": "alloc_and_get",
      "sink_function": "serialargs_get_ptr",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=ctrl->memref.size,dst_sz=size"
        ]
      },
      "why": "Reads 'size' bytes from args->next where 'size' originates from REE (attr.attrs_size) without an explicit conservative upper bound.",
      "code_excerpt": "rc = serialargs_get_ptr(args, &src, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 140,
      "function": "serialargs_alloc_get_attributes",
      "sink_function": "alloc_and_get",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=attr.attrs_size,src_sz=attr.attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses attr.attrs_size (from REE) as length for alloc_and_get without explicit upper bound validation.",
      "code_excerpt": "rc = alloc_and_get(args, orig_next, &attr, sizeof(attr), &p, attr.attrs_size);"
    }
  ]
}
フロー #154: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> modify_attributes_list -> set_attribute -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_set_attribute_valuemodify_attributes_listset_attributeadd_attributeserializeTEE_MemMove

実行時間: 93.18秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: Although the copy source is REE-tainted, the destination is TA-private and integer-overflow and allocation failure are checked prior to the copy, so this sink does not create a memory-safety or confidential-data-exfiltration vulnerability at this line; remaining issues are resource/logic risks upstream.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [204, 302]:
-- Call #1 at line 204 --
202: return rc;
203:
204: >>> return add_attribute(head, attribute, data, size);
205: }
206:
-- Call #2 at line 302 --
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302: >>> 			rc = add_attribute(head, pkcs11_ref.id,
303:     					   ref_attr + sizeof(pkcs11_ref),
304:     					   pkcs11_ref.size);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: {
34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size;
35: char **bstart = (void *)head;
36: enum pkcs11_rc rc = PKCS11_CKR_OK;
37: uint32_t data32 = 0;
38:
39: data32 = attribute;
40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
43:
44: data32 = size;
45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
48:
49: rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;
52:
53:
54: head = (void *)bstart;
55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size;
56: (*head)->attrs_count++;
57:
58: return rc;
59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"add_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "data32",
        "rhs": "attribute (copied into serialized buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-41"
      },
      {
        "lhs": "data32",
        "rhs": "size (copied into serialized buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:44-46"
      },
      {
        "lhs": "buffer (via bstart)",
        "rhs": "serialize(bstart, &buf_len, data, size) (data copied into buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "(*head)->attrs_size + 2 * sizeof(uint32_t) + size (updated)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:40-51",
        "evidence": "serialize(...) returns error on failure; caller checks rc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 204,
      "function": "add_attribute",
      "rule": "other",
      "why": "head pointer originates from caller and is forwarded as buffer base (bstart) used for serialization; aliasing of caller buffer into internal buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=(*head)->attrs_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 204,
      "function": "add_attribute",
      "rule": "other",
      "why": "data argument (provided by caller) is forwarded into serialize without extra validation here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 302,
      "function": "add_attribute",
      "rule": "other",
      "why": "call-site passes ref_attr+offset as data pointer (alias into caller-derived region) into add_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=pkcs11_ref.size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_ref.id, ref_attr + sizeof(pkcs11_ref), pkcs11_ref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "uses head->attrs_size and caller-provided size to compute buf_len and perform serialize calls; malformed attrs_size or size may lead to incorrect bounds",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=(*head)->attrs_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data copied via TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen, *bstart",
        "rhs": "updated to nlen and buf after realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks combination of *blen and len and returns error if overflow"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "TEE_Realloc failure checked and returns PKCS11_CKR_DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "bstart argument aliases caller-managed buffer (bstart points into head buffer) passed into serialize from add_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=(*head)->attrs_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "blen (&buf_len) passed from caller into serialize and mutated there (realloc/size update) creating aliasing risk",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=*blen,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "data pointer and len (often derived from caller/template) are copied into buffer after realloc without content validation; malformed len could lead to large allocations or logical inconsistency",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size); TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf + *blen",
      "data",
      "len",
      "*blen",
      "nlen",
      "bstart",
      "blen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data copied by TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen, *bstart",
        "rhs": "updated to nlen and buf after successful copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks *blen + len and returns error on overflow"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "TEE_Realloc failure is detected and error returned"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pointer buf + *blen aliases caller-managed buffer (bstart) and is mutated after realloc, creating aliasing of caller buffer into internal region",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "data pointer and len (often derived from upstream REE-provided template) are copied into destination without further validation of content or expected type",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "length argument len is caller-controlled (propagated from template parsing) and is forwarded to memmove, affecting allocation and copy size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Source (data) is REE‑derived and tainted but the destination is an internal TA buffer (not REE-visible); overflow/overflow-addition checked by ADD_OVERFLOW and realloc failure is handled before the copy.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided template/ref_attr in params->memref.buffer (REE-visible)",
      "propagation_path": [
        "params->memref.buffer -> serialargs parsing -> template (object.c:992-1003)",
        "template -> head/create_attributes_from_template -> head (object.c:1047-1052)",
        "head buffer -> modify_attributes_list reads cli_head and cli_ref->data (attributes.c:210-225)",
        "cli_ref->data (ref_attr+offset) -> add_attribute(data,size) (attributes.c:221-304)",
        "add_attribute passes data/size into serialize(bstart,&buf_len,data,size) (attributes.c:31-51)",
        "serialize calls TEE_MemMove(buf + *blen, data, len) (serializer.c:188)"
      ],
      "sink": "TEE_MemMove copying 'data' into TA-managed buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Maliciously large or malformed template/ref_attr provided by REE caller",
        "No further application-level semantic validation of attribute contents/lengths"
      ],
      "attack_scenario": "Attacker supplies a template with very large 'size' fields leading to large allocations or resource exhaustion, or supplies malformed attr sizes causing unexpected behavior in higher-level logic.",
      "impact": "Denial of service via memory exhaustion or logical corruption of TA attribute lists; no direct confidential data leak to REE at this sink line."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "add_attribute:34-51|unknown",
        "recommendation": "Enforce maximum allowable attribute size and total attrs_size before allocating and copying (reject overly large sizes)"
      },
      {
        "type": "type_validation",
        "location": "modify_attributes_list:215-228|unknown",
        "recommendation": "Validate cli_head.size against remaining bytes (and overall head->attrs_size) before using it to compute len and call set_attribute"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit ADD_OVERFLOW check on *blen + len prevents integer overflow before realloc",
        "TEE_Realloc failure is checked"
      ],
      "negative_indicators": [
        "len is derived from upstream parsed fields (cli_head.size) with limited semantic validation",
        "No explicit upper bound limiting per-attribute size or total attribute list growth beyond relying on integer overflow checks"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Although the copy source is REE-tainted, the destination is TA-private and integer-overflow and allocation failure are checked prior to the copy, so this sink does not create a memory-safety or confidential-data-exfiltration vulnerability at this line; remaining issues are resource/logic risks upstream.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Destination is TA-private and effective checks (ADD_OVERFLOW and allocation check) prevent overflow at the memmove; no evidence of sensitive TA-private data being written to REE here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serializer.c:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) returns error on overflow"
    },
    {
      "type": "allocation_check",
      "location": "serializer.c:184-186",
      "evidence": "TEE_Realloc checked for NULL and error returned"
    }
  ],
  "argument_safety": [
    {
      "arg": "data",
      "why_safe": "Copied into TA-managed buffer after integer-overflow check and successful realloc",
      "evidence": "serializer.c:181-191"
    },
    {
      "arg": "buf + *blen",
      "why_safe": "Destination lies in TA-owned buffer (bstart) not exposed to REE",
      "evidence": "add_attribute/serialize bstart derived from head buffer (attributes.c:34, serializer.c:184-191)"
    }
  ],
  "residual_risks": [
    "Upstream weak_input_validation: template-derived sizes (cli_head.size, head->attrs_size) are used to compute bounds and allocation sizes without strict upper limits (attributes.c:220-221, attributes.c:34, add_attribute/serialize)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "ADD_OVERFLOW present and checked",
      "Realloc failure handled before copy"
    ],
    "negative_indicators": [
      "Upstream size fields originate from REE and lack strict application-level maximum checks"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The line performs a copy into TA-private memory with integer-overflow and alloc checks; therefore it is not classified as vulnerable for memory-safety or unencrypted output, but upstream weak input validation and lack of explicit size limits remain structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head)+cli_head.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "cli_head.size (from REE-derived template) is used to compute len and drive the loop without strict upper bounds validation",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head)); len = sizeof(cli_head) + cli_head.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "caller-provided data pointer and size are forwarded into serialize without application-level limits on size",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}
フロー #155: TA_InvokeCommandEntryPoint -> entry_copy_object -> modify_attributes_list -> set_attribute -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectmodify_attributes_listset_attributeadd_attributeserializeTEE_MemMove

実行時間: 113.41秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: No evidence of out-of-bounds copy or REE-visible sink at line 188; integer overflow is checked and destination is TA-private. However untrusted length may cause large allocations (DoS), so issue is reported as structural (weak_input_validation) rather than line-level vulnerable memory-safety or unencrypted_output.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [204, 302]:
-- Call #1 at line 204 --
202: return rc;
203:
204: >>> return add_attribute(head, attribute, data, size);
205: }
206:
-- Call #2 at line 302 --
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302: >>> 			rc = add_attribute(head, pkcs11_ref.id,
303:     					   ref_attr + sizeof(pkcs11_ref),
304:     					   pkcs11_ref.size);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: {
34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size;
35: char **bstart = (void *)head;
36: enum pkcs11_rc rc = PKCS11_CKR_OK;
37: uint32_t data32 = 0;
38:
39: data32 = attribute;
40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
43:
44: data32 = size;
45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
48:
49: rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;
52:
53:
54: head = (void *)bstart;
55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size;
56: (*head)->attrs_count++;
57:
58: return rc;
59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"add_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head (pointer to buffer start)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "data32",
        "rhs": "attribute then size (serialized via serialize calls)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-46"
      },
      {
        "lhs": "bstart (after serialize)",
        "rhs": "serialize(bstart, &buf_len, data, size) which consumes 'data' and 'size'",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "increment by 2 * sizeof(uint32_t) + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55"
      }
    ],
    "sanitizers": [
      {
        "kind": "buffer_management_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:40-49",
        "evidence": "serialize() is used to append fields and updates buf_len; serialize must enforce bounds but not shown here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 204,
      "function": "add_attribute",
      "rule": "other",
      "why": "Call-site binding: 'head' parameter aliases caller's head (passed from set_attribute), origin TA-private but ultimately influenced by earlier parsing",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct obj_attrs *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 302,
      "function": "add_attribute",
      "rule": "other",
      "why": "Call-site binding: 'data' parameter at call-site points into parsed attribute stream (cli_ref->data) influenced by external input",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_ref.id, ref_attr + sizeof(pkcs11_ref), pkcs11_ref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serialize(bstart,&buf_len,data,size) appends untrusted data of length 'size' without visible local validation of 'size' against buf_len",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 55,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "Updates (*head)->attrs_size by adding size; untrusted size can cause overflow or incorrect size accounting if not validated",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=2*sizeof(uint32_t)+size,src_sz=buf_len,dst_sz=(*head)->attrs_size"
        ]
      },
      "code_excerpt": "(*head)->attrs_size += 2 * sizeof(uint32_t) + size;"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) result when no overflow",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184"
      },
      {
        "lhs": "buf + *blen (destination)",
        "rhs": "data (source) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen",
        "rhs": "nlen (updated after successful realloc and copy)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190"
      },
      {
        "lhs": "*bstart",
        "rhs": "buf (possibly reallocated base pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:191"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents size overflow before realloc"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and returns DEVICE_MEMORY on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "Call-site binding: 'bstart' at caller points to caller-managed buffer start (bstart) passed from add_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(char *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "Call-site binding: 'blen' parameter aliases &buf_len (caller-managed size) from add_attribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "Call-site binding: 'data' parameter originates from parsed attribute stream (cli_ref->data) influenced by external input",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "Copies 'len' bytes from caller-controlled data into reallocated buffer; though overflow check exists, data length is caller-controlled and realloc may succeed with large allocations",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "dest (buf + *blen)",
        "rhs": "buf (result of TEE_Realloc(*bstart, nlen)) + *blen",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184,188"
      },
      {
        "lhs": "src",
        "rhs": "data (caller-provided pointer from add_attribute/attributes parsing)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "len",
        "rhs": "len parameter passed from caller (size derived from parsed attribute)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer wrap before realloc"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and errors out on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination pointer is buffer returned by TEE_Realloc (TA-private) computed from bstart/*blen",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=*blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'data' originates from parsed attribute stream (influenced by REE input)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies caller-controlled 'len' bytes into reallocated buffer; although ADD_OVERFLOW checks integer overflow, 'len' is untrusted and may cause excessive allocation or logic issues",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Destination is TA-private (buf from TEE_Realloc) and integer-overflow check (ADD_OVERFLOW) plus realloc/alloc check precede the copy; no evidence of direct memory-safety overflow or REE-visible plaintext exfiltration at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-supplied attribute bytes (influenced by REE)",
      "propagation_path": [
        "params (REE) -> ctrl->memref.buffer at object.c:1108",
        "parsed attribute stream -> cli_ref->data at attributes.c:216",
        "data passed into add_attribute -> serialize at attributes.c:49",
        "serialize -> TEE_MemMove(buf + *blen, data, len) at serializer.c:188"
      ],
      "sink": "TEE_MemMove destination in TA-private buffer (serialize:188)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "maliciously crafted attribute data supplied from REE controlling 'len' and data pointer",
        "sufficient memory available for requested allocation"
      ],
      "attack_scenario": "Attacker supplies very large 'len' so serialize attempts large realloc, causing resource exhaustion or denial-of-service if memory obtained; no direct overflow observed.",
      "impact": "Denial-of-service/resource exhaustion; not direct memory corruption or secret leak at this call site."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "serialize:181-188",
        "recommendation": "Enforce an upper bound on 'len' (and cumulative buf size) based on policy limits before realloc to avoid excessive allocations."
      },
      {
        "type": "type_validation",
        "location": "attributes.c:220-222",
        "recommendation": "Validate cli_head.size against remaining bytes and reasonable maximums before using it to compute len."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check prevents integer wrap prior to realloc",
        "TEE_Realloc return is checked"
      ],
      "negative_indicators": [
        "len (copy length) is attacker-controlled/untrusted and not locally range-limited",
        "data pointer originates from parsed REE input"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "No evidence of out-of-bounds copy or REE-visible sink at line 188; integer overflow is checked and destination is TA-private. However untrusted length may cause large allocations (DoS), so issue is reported as structural (weak_input_validation) rather than line-level vulnerable memory-safety or unencrypted_output.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "ADD_OVERFLOW and alloc checks mitigate integer-overflow and immediate allocation failures; destination is TA-private so no plaintext exfiltration at this sink line.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "serializer.c:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer wrap before realloc"
    },
    {
      "type": "mem_access_check",
      "location": "serializer.c:184-186",
      "evidence": "checks TEE_Realloc return and errors out on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "data",
      "why_safe": "not safe (untrusted)",
      "evidence": "attributes.c:216-225 (cli_ref->data originates from parsed head which is REE-influenced)"
    },
    {
      "arg": "len",
      "why_safe": "partially checked for integer overflow but not range-limited",
      "evidence": "serializer.c:181-182 (ADD_OVERFLOW) and used at 188"
    }
  ],
  "residual_risks": [
    "188: potential resource exhaustion from attacker-controlled 'len' despite overflow check"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit overflow and allocation failure checks present",
      "destination buffer is TA-private"
    ],
    "negative_indicators": [
      "source length/value is untrusted and not bounded by policy",
      "several upstream functions parse untrusted data with limited validation"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 188 does not present a direct memory-safety overflow nor REE-visible secret leak given the checks and TA-private destination; primary concern is weak input validation leading to potential DoS, captured as structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 220,
      "function": "modify_attributes_list",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=end-cur,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "Copies header from parsed stream without verifying remaining bytes; header.size then used to drive parsing.",
      "code_excerpt": "TEE_MemMove(&cli_head, cur, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 221,
      "function": "modify_attributes_list",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "Uses cli_head.size (unvalidated) to compute loop advance 'len', enabling OOB or logic issues if malicious.",
      "code_excerpt": "len = sizeof(cli_head) + cli_head.size;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize appends untrusted data of length 'size' without caller-enforced upper bound checks.",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen"
        ]
      },
      "why": "Copies caller-controlled 'len' bytes into reallocated buffer; overflow check present but no policy upper-bound on 'len'.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #156: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> add_missing_attribute_id -> set_attribute -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairadd_missing_attribute_idset_attributeadd_attributeserializeTEE_MemMove

実行時間: 93.57秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: Memory-safety protections (ADD_OVERFLOW + TEE_Realloc) address the primary overflow risk at the copy site, and the destination is TA-private so this line is not an unencrypted-REE output; residual issues are input validation of source pointer/length.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_attribute at lines [204, 302]:
-- Call #1 at line 204 --
202: return rc;
203:
204: >>> return add_attribute(head, attribute, data, size);
205: }
206:
-- Call #2 at line 302 --
300: rc = get_attribute_ptr(*head, pkcs11_ref.id, &value, &size);
301:     		if (rc == PKCS11_RV_NOT_FOUND) {
302: >>> 			rc = add_attribute(head, pkcs11_ref.id,
303:     					   ref_attr + sizeof(pkcs11_ref),
304:     					   pkcs11_ref.size);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: {
34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size;
35: char **bstart = (void *)head;
36: enum pkcs11_rc rc = PKCS11_CKR_OK;
37: uint32_t data32 = 0;
38:
39: data32 = attribute;
40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
43:
44: data32 = size;
45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
48:
49: rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;
52:
53:
54: head = (void *)bstart;
55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size;
56: (*head)->attrs_count++;
57:
58: return rc;
59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"add_attribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(char **)(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "buf (serialized)",
        "rhs": "serialize(bstart, &buf_len, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "(*head)->attrs_size + 2 * sizeof(uint32_t) + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:31-36",
        "evidence": "function assumes valid head pointer and existing (*head)->attrs_size; no internal null/size checks on data pointer"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 204,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller into add_attribute; head may reference obj_attrs built from REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return add_attribute(head, attribute, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 302,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of data pointer (ref_attr + sizeof(pkcs11_ref)) passed into add_attribute; data likely points into parsed REE-provided buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=pkcs11_ref.size,src_sz=pkcs11_ref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_ref.id, ref_attr + sizeof(pkcs11_ref), pkcs11_ref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serialize is called with data and size from caller without explicit bounds check against buf_len leading to possible overflow of attribute buffer",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 54,
      "function": "add_attribute",
      "rule": "other",
      "why": "updates (*head)->attrs_size by adding user-controlled size without additional validation; may corrupt internal bookkeeping if size is tainted",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=2*sizeof(uint32_t)+size,src_sz=size,dst_sz=(*head)->attrs_size"
        ]
      },
      "code_excerpt": "(*head)->attrs_size += 2 * sizeof(uint32_t) + size;"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) calculation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen memory region",
        "rhs": "TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188-189"
      },
      {
        "lhs": "*blen, *bstart",
        "rhs": "*blen = nlen; *bstart = buf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents size_t overflow when computing new buffer length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "bstart (caller buffer pointer) alias passed into serialize from add_attribute; origin is heap buffer referenced by caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=*blen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "blen pointer (address of buf_len) passed into serialize from add_attribute; links caller bookkeeping into callee",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=*blen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "data pointer passed into serialize originates from caller (may point into REE-provided buffer parsed earlier)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies caller-controlled data into reallocated buffer without validating data content or checking that data pointer is valid for len bytes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf + *blen",
      "data",
      "len",
      "*blen",
      "nlen",
      "buf"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "destination pointer for copy into reallocated buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "copied from data for len bytes via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing new buffer size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of destination pointer (buf + *blen) passed into TEE_MemMove; destination is TA heap buffer derived from caller-managed bstart",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of source data pointer passed into TEE_MemMove; data may point into REE-provided buffers parsed earlier",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "TEE_MemMove copies caller-controlled data pointer for len bytes without validating that 'data' is valid for 'len' or that len is within expected provenance",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen - *blen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination buffer size was recomputed with ADD_OVERFLOW and reallocated (bounds check) before the copy; source is REE-tainted but copy destination is TEE-private so not an unencrypted-REE output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided attribute/template buffers (data pointer passed down from params)",
      "propagation_path": [
        "params (REE) -> add_attribute ref_attr + offset @ attributes.c:302",
        "data -> serialize(...) call @ attributes.c:49",
        "serialize: data -> TEE_MemMove(buf + *blen, data, len) @ serializer.c:188"
      ],
      "sink": "TEE_MemMove copies REE-origin data into TA heap buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Malformed or malicious REE-provided attribute data and a valid 'len' value",
        "Ability to control 'data' and 'len' via caller parameters"
      ],
      "attack_scenario": "Attacker supplies large or specially crafted attribute bytes; serialize reallocates and copies them into TA heap but ADD_OVERFLOW prevents integer overflow; without additional checks attacker may influence TA memory layout.",
      "impact": "Potential corruption of TA-managed attribute structures or denial-of-service if upstream invariants are violated; no direct secret leakage from this line"
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "serialize:188",
        "recommendation": "Validate that 'data' pointer and 'len' refer to a valid REE-shared region of expected format before copying; validate provenance/limits beyond integer-overflow checks."
      },
      {
        "type": "type_validation",
        "location": "add_attribute:49",
        "recommendation": "Validate attribute size and expected semantics before serializing into internal buffer."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check before realloc prevents integer overflow",
        "TEE_Realloc used to size destination buffer"
      ],
      "negative_indicators": [
        "No validation that 'data' pointer is valid for 'len' bytes",
        "Source is REE-controlled and size is copied without provenance checks"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety protections (ADD_OVERFLOW + TEE_Realloc) address the primary overflow risk at the copy site, and the destination is TA-private so this line is not an unencrypted-REE output; residual issues are input validation of source pointer/length.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Integer-overflow and buffer resizing checks (ADD_OVERFLOW and TEE_Realloc) prevent overflow at the TEE_MemMove call; destination is TEE-private, so no plaintext leak to REE at this site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:181-184",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) and TEE_Realloc(*bstart, nlen) before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "data",
      "why_safe": "Not fully validated—pointer provenance and reachable length are unchecked",
      "evidence": "attributes.c:49 -> serialize called with data,len; serialize does not validate source pointer"
    },
    {
      "arg": "len",
      "why_safe": "Checked for addition overflow with *blen but not checked against source buffer bounds",
      "evidence": "serializer.c:181-182"
    }
  ],
  "residual_risks": [
    "serialize may copy REE-controlled bytes into TA heap without verifying data semantics or that the source buffer is valid for 'len' bytes",
    "Upstream weak input validation of attribute sizes/contents may allow unexpected memory layout changes"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct ADD_OVERFLOW check and realloc before copy",
      "No evidence of copying TA-private secrets out at this call"
    ],
    "negative_indicators": [
      "Source pointer provenance and content not validated",
      "Upstream attributes may be REE-controlled"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the explicit integer-overflow prevention and reallocation before TEE_MemMove, the copy is protected from size/overflow exploits at this line; remaining concerns are weak input validation earlier in the chain, which are structural and listed separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize is invoked with caller-controlled data and size without validating data provenance/format, enabling malformed attributes to be stored",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2825,
      "function": "add_missing_attribute_id",
      "sink_function": "set_attribute",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=id1_size,src_sz=id1_size,dst_sz=unknown"
        ]
      },
      "why": "set_attribute called with id pointer/size from get_attribute_ptr without validating provenance or reasonable size limits",
      "code_excerpt": "return set_attribute(priv_head, PKCS11_CKA_ID, id1, id1_size);"
    }
  ]
}
フロー #157: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretgenerate_random_key_valueadd_attributeserializeTEE_MemMove

実行時間: 112.53秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: Memory-safety protections (overflow check + realloc NULL check) prevent exploitation of TEE_MemMove as a buffer overflow; remaining concern is resource exhaustion from unbounded 'len', so classification is not a direct vulnerability of this sink.

信頼度: MEDIUM

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_random_key_value at lines [197, 376]:
-- Call #1 at line 197 --
195: TEE_GenerateRandom(value, value_len);
196:
197: >>> rc = add_attribute(head, PKCS11_CKA_VALUE, value, value_len);
198:
199: TEE_Free(value);
-- Call #2 at line 376 --
374: goto out;
375:
376: >>> rc = add_attribute(head, pkcs11_id, a_ptr, a_size);
377:
378: TEE_Free(a_ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "*head",
      "buf_len",
      "bstart",
      "data",
      "size",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "data32",
        "rhs": "attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-41"
      },
      {
        "lhs": "data32",
        "rhs": "size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:44-46"
      },
      {
        "lhs": "buffer contents",
        "rhs": "serialize(bstart, &buf_len, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size, (*head)->attrs_count",
        "rhs": "increment after successful serialize",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:54-57"
      }
    ],
    "sanitizers": [
      {
        "kind": "size_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34-35",
        "evidence": "initial buf_len computed from current (*head)->attrs_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 197,
      "function": "add_attribute",
      "rule": "other",
      "why": "caller passes address of 'head' into callee; binding of callee parameter 'head' to caller origin recorded (origin not proven TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, PKCS11_CKA_VALUE, value, value_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "add_attribute",
      "rule": "other",
      "why": "data pointer argument 'data' is an alias of caller buffer (a_ptr/value); record origin region—may be TEE-private or REE-visible depending on callsite",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "calls serialize(bstart,&buf_len,data,size) with 'size' derived from caller-controlled input without an explicit upper bound check against available buffer",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) result computes new length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen (dest range)",
        "rhs": "data (source) via TEE_MemMove(..., data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188-189"
      },
      {
        "lhs": "*blen, *bstart",
        "rhs": "updated to nlen and buf after successful realloc and memmove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks for size_t overflow when computing nlen"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return for NULL and returns device memory error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "caller passes address of local data32 (&data32) into serialize; binding records callee param 'data' origin as local stack (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "caller passes address of data32 (size) into serialize; callee 'data' binds to caller stack value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "copies 'len' bytes from caller-provided 'data' into resized buffer using TEE_MemMove; 'len' originates from higher-level input and lacks an explicit application-level upper bound check",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf + *blen (dest)",
      "data (src)",
      "len",
      "buf",
      "*blen",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "dest (buf + *blen)",
        "rhs": "buf + *blen (computed in caller after TEE_Realloc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184,188"
      },
      {
        "lhs": "src",
        "rhs": "data (caller-provided pointer passed into serialize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "copy length",
        "rhs": "len (originates from caller's 'size')",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks nlen = *blen + len to detect overflow before realloc"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return for NULL before calling TEE_MemMove"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pointer is an alias into a realloc'd buffer computed in caller; record binding of callee dest to caller-owned buffer (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'len' bytes from caller-provided 'data' into internal buffer; 'len' originates from higher-level input and lacks an application-level upper bound check here",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binds callee 'data' parameter to caller-origin 'data' pointer (may be heap or REE-derived); record origin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "length 'len' is used but prior ADD_OVERFLOW check computes nlen and TEE_Realloc is verified before TEE_MemMove, preventing overflow/overflow-based copy; however 'len' originates from higher-level input so application-level bound checks are absent.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "higher-level input (attribute/template/serialargs) -> data/size",
      "propagation_path": [
        "params (caller) -> template/ctrlargs @ processing.c:226-238",
        "template/attribute -> size/data propagated into add_attribute @ attributes.c:44-49",
        "serialize called with data,len -> ADD_OVERFLOW & realloc -> TEE_MemMove @ serializer.c:181-188"
      ],
      "sink": "TEE_MemMove(buf + *blen, data, len) at serializer.c:188"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker-controlled template/attribute to supply large 'size' value"
      ],
      "attack_scenario": "Supply excessive 'len' may trigger large allocation or resource exhaustion but not buffer overflow due to overflow check and realloc verification.",
      "impact": "Denial of service via memory/resource exhaustion is possible; no direct memory-corruption observed."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "generate_random_key_value:191|add_attribute:44-49|serialize:181-188",
        "recommendation": "Enforce application-level upper bound on 'len' (e.g., max attribute size) before realloc/ memcpy to prevent unbounded allocations."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check before realloc",
        "TEE_Realloc return checked before MemMove"
      ],
      "negative_indicators": [
        "origin of 'len' is caller-controlled (serialargs/template) and lacks explicit application-level upper bound"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety protections (overflow check + realloc NULL check) prevent exploitation of TEE_MemMove as a buffer overflow; remaining concern is resource exhaustion from unbounded 'len', so classification is not a direct vulnerability of this sink.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "ADD_OVERFLOW prevents size overflow and TEE_Realloc is checked before the copy, so no direct buffer overflow at this sink.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) detects overflow when computing new buffer size"
    },
    {
      "type": "allocation_check",
      "location": "serialize:184-186",
      "evidence": "checks TEE_Realloc return for NULL before TEE_MemMove"
    },
    {
      "type": "type_validation",
      "location": "generate_random_key_value:177-184",
      "evidence": "ensures data_size == sizeof(uint32_t) before copying into value_len"
    }
  ],
  "argument_safety": [
    {
      "arg": "len",
      "why_safe": "ADD_OVERFLOW and realloc ensure destination buffer allocation for len bytes",
      "evidence": "serializer.c:181-186"
    },
    {
      "arg": "data",
      "why_safe": "copied into TA-private buffer after allocation checks; origin may be REE but copy is to TEE-private",
      "evidence": "serializer.c:188"
    }
  ],
  "residual_risks": [
    "188: application-level missing upper bound on 'len' could allow large allocations (resource exhaustion) despite overflow/allocation checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "direct checks at serialize prior to MemMove",
      "realloc NULL check"
    ],
    "negative_indicators": [
      "caller-controlled len/value_size with no explicit max limit"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The sink itself is protected against buffer overflow via overflow detection and allocation checks; thus not vulnerable to memory-corruption at this site, but higher-level lack of max-size limits poses a denial-of-service risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "why": "value_len derived from attribute (caller-controlled template) is used to allocate without an application-level upper bound",
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize called with 'size' from caller without explicit application-level upper bound",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}
フロー #158: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> tee2pkcs_rsa_attributes -> tee2pkcs_add_attribute -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keystee2pkcs_rsa_attributestee2pkcs_add_attributeadd_attributeserializeTEE_MemMove

実行時間: 139.78秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: Memory-safety protections (ADD_OVERFLOW and realloc check) are present and prevent overflow of allocation size; destination is TEE-private so no unencrypted REE disclosure. Thus not classified vulnerable for the evaluated sink line.

信頼度: MEDIUM

LLM対話履歴 (10 メッセージ)

関数: tee2pkcs_add_attribute
プロンプト 中間 (tee2pkcs_add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “tee2pkcs_add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_rsa_attributes at lines [619, 638, 646, 651, 656, 661, 666, 671, 676, 681]:
-- Call #1 at line 619 --
617: void *a_ptr = NULL;
618:
619: >>> rc = tee2pkcs_add_attribute(pub_head, PKCS11_CKA_MODULUS, tee_obj,
620: TEE_ATTR_RSA_MODULUS);
621: if (rc)
-- Call #2 at line 638 --
636:
637: if (rc == PKCS11_RV_NOT_FOUND) { 638: >>> rc = tee2pkcs_add_attribute(pub_head, 639: PKCS11_CKA_PUBLIC_EXPONENT, 640: tee_obj, -- Call #3 at line 646 -- 644: }
645:
646: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_MODULUS, tee_obj,
647: TEE_ATTR_RSA_MODULUS);
648: if (rc)
-- Call #4 at line 651 --
649: goto out;
650:
651: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PUBLIC_EXPONENT,
652: tee_obj, TEE_ATTR_RSA_PUBLIC_EXPONENT);
653: if (rc)
-- Call #5 at line 656 --
654: goto out;
655:
656: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIVATE_EXPONENT,
657: tee_obj, TEE_ATTR_RSA_PRIVATE_EXPONENT);
658: if (rc)
-- Call #6 at line 661 --
659: goto out;
660:
661: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIME_1, tee_obj,
662: TEE_ATTR_RSA_PRIME1);
663: if (rc)
-- Call #7 at line 666 --
664: goto out;
665:
666: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_PRIME_2, tee_obj,
667: TEE_ATTR_RSA_PRIME2);
668: if (rc)
-- Call #8 at line 671 --
669: goto out;
670:
671: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EXPONENT_1, tee_obj,
672: TEE_ATTR_RSA_EXPONENT1);
673: if (rc)
-- Call #9 at line 676 --
674: goto out;
675:
676: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EXPONENT_2, tee_obj,
677: TEE_ATTR_RSA_EXPONENT2);
678: if (rc)
-- Call #10 at line 681 --
679: goto out;
680:
681: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_COEFFICIENT, tee_obj,
682: TEE_ATTR_RSA_COEFFICIENT);
683: out:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

363: enum pkcs11_rc tee2pkcs_add_attribute(struct obj_attrs **head,
364: uint32_t pkcs11_id,
365: TEE_ObjectHandle tee_obj,
366: uint32_t tee_id)
367: { 368: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 369: void *a_ptr = NULL; 370: size_t a_size = 0; 371: 372: rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size); 373: if (rc) 374: goto out; 375: 376: rc = add_attribute(head, pkcs11_id, a_ptr, a_size); 377: 378: TEE_Free(a_ptr); 379: 380: out: 381: if (rc) 382: EMSG("Failed TEE attribute %#"PRIx32" for %#"PRIx32"/%s", 383: tee_id, pkcs11_id, id2str_attr(pkcs11_id)); 384: return rc; 385: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "tee2pkcs_add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"tee2pkcs_add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (tee2pkcs_add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "tee2pkcs_add_attribute",
    "tainted_vars": [
      "head",
      "pkcs11_id",
      "tee_obj",
      "tee_id",
      "a_ptr",
      "a_size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "a_ptr,a_size",
        "rhs": "alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:372-374"
      },
      {
        "lhs": "rc",
        "rhs": "add_attribute(head, pkcs11_id, a_ptr, a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:376-377"
      },
      {
        "lhs": "a_ptr (freed)",
        "rhs": "TEE_Free(a_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:378"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:372-374",
        "evidence": "Checks rc from alloc_get_tee_attribute_data and jumps out on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "tee2pkcs_add_attribute",
      "rule": "other",
      "why": "alias of caller-provided head (obj_attrs**) passed into helper; head may originate from upstream templates derived from REE data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_add_attribute(pub_head, PKCS11_CKA_MODULUS, tee_obj, TEE_ATTR_RSA_MODULUS);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "tee2pkcs_add_attribute",
      "rule": "other",
      "why": "tee_obj handle (TEE_ObjectHandle) passed in from caller and used to extract attribute data; handle is TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_add_attribute(..., tee_obj, TEE_ATTR_RSA_MODULUS);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "tee2pkcs_add_attribute",
      "rule": "other",
      "why": "allocated attribute buffer a_ptr (from TEE) is copied into PKCS#11 attribute list via add_attribute; provenance is TEE attribute data",
      "sink_function": "add_attribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    }
  ]
}

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_add_attribute at lines [376]:
-- Call #1 at line 376 --
374: goto out;
375:
376: >>> rc = add_attribute(head, pkcs11_id, a_ptr, a_size);
377:
378: TEE_Free(a_ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "data32",
        "rhs": "attribute then size via serialize calls",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-46"
      },
      {
        "lhs": "rc",
        "rhs": "serialize(bstart, &buf_len, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "(*head)->attrs_size + 2 * sizeof(uint32_t) + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of head (obj_attrs**) passed from caller (tee2pkcs_add_attribute) — head may originate from REE-derived templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "add_attribute",
      "rule": "other",
      "why": "data pointer (a_ptr) passed from alloc_get_tee_attribute_data is alias of allocated TEE buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 34,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "computes buf_len from (*head)->attrs_size and then serializes into buffer without explicit capacity check of destination, relying on serialize to enforce bounds",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; ... rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) computes new buffer length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen (write target)",
        "rhs": "data (source) copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen",
        "rhs": "updated to nlen after successful realloc and copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      },
      {
        "lhs": "*bstart",
        "rhs": "updated to buf after realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing new length"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "Checks result of TEE_Realloc and returns on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "bstart argument at call-site aliases caller's head buffer pointer (obj_attrs**) and thus links caller-managed buffer into serialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "blen argument at call-site is derived from computed buf_len (which originates from (*head)->attrs_size) and is used for allocation/offsets",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=(*head)->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "data argument at call-site (a_ptr) is an allocated buffer from TEE and is copied into the serialized buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "rule": "other",
      "why": "TEE_MemMove writes len bytes at buf + *blen after realloc; reliance on ADD_OVERFLOW and realloc success provides safety but write uses caller-controlled *blen and len",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf + *blen",
      "data",
      "len",
      "buf",
      "*blen",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-185"
      },
      {
        "lhs": "write_target (buf + *blen)",
        "rhs": "data copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen",
        "rhs": "updated to nlen after the copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing nlen"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "Checks result of TEE_Realloc and returns on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination buffer (buf + *blen) is derived from caller-managed bstart and updated via realloc; write target provenance links caller buffer into this copy",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source pointer 'data' may originate from allocated TEE attribute buffers or local temporaries (e.g., a_ptr or &data32) and is copied into buf",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "The copy uses caller-controlled *blen and len; safety depends on prior ADD_OVERFLOW and successful realloc—no explicit runtime check at the copy site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination buffer is a TEE-private buffer grown via TEE_Realloc with integer-overflow check (ADD_OVERFLOW) and allocation check before the copy; source provenance is TEE-private/unknown but not copied to REE here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "allocated attribute data or local temporary (a_ptr or &data32)",
      "propagation_path": [
        "a_ptr/a_size <- alloc_get_tee_attribute_data @ processing.c:372",
        "add_attribute(head, pkcs11_id, a_ptr, a_size) @ processing.c:376 -> attributes.c:49",
        "serialize(bstart, &buf_len, data, size) @ attributes.c:49 -> serializer.c:188",
        "TEE_MemMove(buf + *blen, data, len) @ serializer.c:188"
      ],
      "sink": "TEE_MemMove writes into TEE-private buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed or malicious attribute size/contents provided by caller",
        "ability to control head/attrs_size leading to unexpected offsets"
      ],
      "attack_scenario": "An attacker supplies crafted attribute templates aiming to trigger out-of-bounds writes during serialization if allocator checks were absent or overflow checks bypassed.",
      "impact": "Potential memory corruption within TA address space (denial of service or code execution) if allocator/checks fail."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "serialize:188",
        "recommendation": "Add explicit sanity checks on *blen and len immediately before the copy and assert buf != NULL and len <= nlen - *blen"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct copy at serializer.c:188 using caller-influenced *blen and len",
        "Caller-provided templates/attributes flow into serialize"
      ],
      "negative_indicators": [
        "ADD_OVERFLOW prevents integer overflow when computing nlen",
        "TEE_Realloc result is checked and function returns on failure"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety protections (ADD_OVERFLOW and realloc check) are present and prevent overflow of allocation size; destination is TEE-private so no unencrypted REE disclosure. Thus not classified vulnerable for the evaluated sink line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Integer-overflow check and allocation check before the copy mitigate out-of-bounds writes at the sink; destination is TEE-private so no unencrypted REE leak.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing new length"
    },
    {
      "type": "allocation_check",
      "location": "serialize:184-186",
      "evidence": "Checks result of TEE_Realloc and returns on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "data (serialize)",
      "why_safe": "Source is allocated TEE buffer or local temporary; not REE-visible at this call site",
      "evidence": "processing.c/attributes.c -> alloc_get_tee_attribute_data -> a_ptr passed to serialize"
    },
    {
      "arg": "buf + *blen (serialize)",
      "why_safe": "Buffer was realloc'd to nlen computed with overflow check; write target within new allocation if realloc succeeds",
      "evidence": "serializer.c:181-186,188-191"
    }
  ],
  "residual_risks": [
    "188: if ADD_OVERFLOW or TEE_Realloc checks were modified/removed, the copy could become unsafe",
    "attributes serialization relies on caller-managed (*head)->attrs_size correctness; corrupted attrs_size upstream could influence buf_len"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Presence of ADD_OVERFLOW and allocation check at serialize before copy",
      "Realloc updates *bstart and *blen only after successful copy/allocation"
    ],
    "negative_indicators": [
      "buf_len is derived from (*head)->attrs_size which can originate from REE-controlled templates",
      "serialize writes using caller-provided len and *blen without an explicit local bounds assertion at the copy site"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The sink copy at serializer.c:188 is protected by integer-overflow checking and allocation verification; destination remains TEE-private. Although upstream inputs influence sizes, existing checks sufficiently mitigate an immediate vulnerability at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 34,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "Computes buf_len from (*head)->attrs_size and serializes into buffer without an explicit capacity check local to caller; relies on serialize to enforce safety.",
      "code_excerpt": "buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; ... rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "why": "Copy uses caller-controlled *blen and len; safety depends on earlier overflow check and successful realloc.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc value into caller-provided REE-visible memref.buffer; structural link to REE output channel (non-sensitive here).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #159: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> tee2pkcs_ec_attributes -> tee2pkcs_add_attribute -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keystee2pkcs_ec_attributestee2pkcs_add_attributeadd_attributeserializeTEE_MemMove

実行時間: 193.09秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: The memmove at line 188 is protected against integer overflow and allocation failures and copies into a TA-private buffer, so it is not a direct memory-safety or unencrypted-REE-output vulnerability at this site.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: tee2pkcs_ec_attributes
プロンプト 中間 (tee2pkcs_ec_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “tee2pkcs_ec_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_ec_keys at lines [653]:
-- Call #1 at line 653 --
651: goto out;
652:
653: >>> rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);
654:
655: out:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c

480: static enum pkcs11_rc tee2pkcs_ec_attributes(struct obj_attrs **pub_head,
481: struct obj_attrs **priv_head,
482: TEE_ObjectHandle tee_obj,
483: size_t tee_size)
484: { 485: void *x_ptr = NULL; 486: void *y_ptr = NULL; 487: uint8_t *ecpoint = NULL; 488: size_t x_size = 0; 489: size_t y_size = 0; 490: size_t psize = 0; 491: size_t qsize = 0; 492: size_t dersize = 0; 493: size_t poffset = 0; 494: size_t hsize = 0; 495: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 496: 497: rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE, 498: tee_obj, TEE_ATTR_ECC_PRIVATE_VALUE); 499: if (rc) 500: goto out; 501: 502: rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_X, 503: &x_ptr, &x_size); 504: if (rc) 505: goto out; 506: 507: rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_Y, 508: &y_ptr, &y_size); 509: if (rc) 510: goto x_cleanup; 511: 512: psize = (tee_size + 7) / 8; 513: if (x_size > psize || y_size > psize) { 514: rc = PKCS11_CKR_ARGUMENTS_BAD; 515: goto y_cleanup; 516: } 517: 518: qsize = 1 + 2 * psize; 519: if (qsize < 0x80) { 520: 521: dersize = qsize + 2; 522: hsize = 2 + 1 ; 523: } else if (qsize < 0x100) { 524: 525: dersize = qsize + 3; 526: hsize = 3 + 1 ; 527: } else { 528: EMSG("Too long DER value"); 529: rc = PKCS11_CKR_MECHANISM_PARAM_INVALID; 530: goto y_cleanup; 531: } 532: 533: ecpoint = TEE_Malloc(dersize, TEE_MALLOC_FILL_ZERO); 534: if (!ecpoint) { 535: rc = PKCS11_CKR_DEVICE_MEMORY; 536: goto y_cleanup; 537: } 538: 539: if (qsize < 0x80) { 540: 541: ecpoint[0] = 0x04; 542: ecpoint[1] = qsize & 0x7f; 543: 544: 545: ecpoint[2] = 0x04; 546: } else if (qsize < 0x100) { 547: 548: ecpoint[0] = 0x04; 549: ecpoint[1] = 0x80 | 0x01; 550: ecpoint[2] = qsize & 0xFF; 551: 552: 553: ecpoint[3] = 0x04; 554: } 555: 556: poffset = 0; 557: if (x_size < psize) 558: poffset = psize - x_size; 559: TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size); 560: 561: poffset = 0; 562: if (y_size < psize) 563: poffset = psize - y_size; 564: TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size); 565: 566: 572: rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, 573: ecpoint, dersize); 574: if (rc) 575: goto ecpoint_cleanup; 576: 577: rc = add_attribute(pub_head, PKCS11_CKA_EC_POINT, ecpoint, dersize); 578: 579: ecpoint_cleanup: 580: TEE_Free(ecpoint); 581: y_cleanup: 582: TEE_Free(y_ptr); 583: x_cleanup: 584: TEE_Free(x_ptr); 585: out: 586: return rc; 587: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "tee2pkcs_ec_attributes", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"tee2pkcs_ec_attributes", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (tee2pkcs_ec_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "tee2pkcs_ec_attributes",
    "tainted_vars": [
      "pub_head",
      "priv_head",
      "tee_obj",
      "tee_size",
      "x_ptr",
      "x_size",
      "y_ptr",
      "y_size",
      "ecpoint",
      "psize",
      "qsize",
      "dersize",
      "hsize"
    ],
    "propagation": [
      {
        "lhs": "x_ptr,x_size",
        "rhs": "alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_X, &x_ptr, &x_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:502-505"
      },
      {
        "lhs": "y_ptr,y_size",
        "rhs": "alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_Y, &y_ptr, &y_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:507-510"
      },
      {
        "lhs": "psize",
        "rhs": "(tee_size + 7) / 8",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:512"
      },
      {
        "lhs": "ecpoint",
        "rhs": "TEE_Malloc(dersize, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:533-537"
      },
      {
        "lhs": "ecpoint[hsize+poffset .. ]",
        "rhs": "x_ptr,x_size and y_ptr,y_size via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:557-564"
      },
      {
        "lhs": "priv_head/pub_head attributes",
        "rhs": "add_attribute(..., ecpoint, dersize) and add_attribute(..., ecpoint, dersize)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:572-578"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:512-516",
        "evidence": "verifies x_size and y_size not greater than computed psize and returns error if so"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:533-537",
        "evidence": "checks TEE_Malloc(ecpoint) return and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 653,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "alias of pub_head pointer (originating from caller templates that may be REE-derived) passed into tee2pkcs_ec_attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 653,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "alias of priv_head pointer (may contain attributes from REE templates) passed into tee2pkcs_ec_attributes",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 653,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "alias of tee_obj handle (TEE-allocated key object) passed into tee2pkcs_ec_attributes; tee_obj is TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 559,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "Copies TEE-managed public coordinate x into an allocated ecpoint buffer via TEE_MemMove; ecpoint later stored into attr structures",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=x_size,src_sz=x_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 564,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "Copies TEE-managed public coordinate y into ecpoint via TEE_MemMove; ecpoint then added to public and private attribute lists",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=y_size,src_sz=y_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 572,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "Adds EC_POINT (derived from TEE key material) into priv_head/pub_head via add_attribute; priv_head may later be persisted or exported (handling secret/public material)",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 577,
      "function": "tee2pkcs_ec_attributes",
      "rule": "other",
      "why": "Adds EC_POINT into pub_head (public attribute) from ecpoint buffer; this copies constructed DER point into attribute list",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=pub_head->attrs_size+sizeof(*pub_head)"
        ]
      },
      "code_excerpt": "rc = add_attribute(pub_head, PKCS11_CKA_EC_POINT, ecpoint, dersize);"
    }
  ]
}

関数: tee2pkcs_add_attribute
プロンプト 中間 (tee2pkcs_add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “tee2pkcs_add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_ec_attributes at lines [497, 783, 788, 793]:
-- Call #1 at line 497 --
495: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
496:
497: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE,
498: tee_obj, TEE_ATTR_ECC_PRIVATE_VALUE);
499: if (rc)
-- Call #2 at line 783 --
781: goto out;
782:
783: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE,
784: tee_obj, TEE_ATTR_ED25519_PRIVATE_VALUE);
785: if (rc)
-- Call #3 at line 788 --
786: goto out;
787:
788: >>> rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_EC_POINT,
789: tee_obj, TEE_ATTR_ED25519_PUBLIC_VALUE);
790: if (rc)
-- Call #4 at line 793 --
791: goto out;
792:
793: >>> rc = tee2pkcs_add_attribute(pub_head, PKCS11_CKA_EC_POINT,
794: tee_obj, TEE_ATTR_ED25519_PUBLIC_VALUE);
795:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

363: enum pkcs11_rc tee2pkcs_add_attribute(struct obj_attrs **head,
364: uint32_t pkcs11_id,
365: TEE_ObjectHandle tee_obj,
366: uint32_t tee_id)
367: { 368: enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR; 369: void *a_ptr = NULL; 370: size_t a_size = 0; 371: 372: rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size); 373: if (rc) 374: goto out; 375: 376: rc = add_attribute(head, pkcs11_id, a_ptr, a_size); 377: 378: TEE_Free(a_ptr); 379: 380: out: 381: if (rc) 382: EMSG("Failed TEE attribute %#"PRIx32" for %#"PRIx32"/%s", 383: tee_id, pkcs11_id, id2str_attr(pkcs11_id)); 384: return rc; 385: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "tee2pkcs_add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"tee2pkcs_add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (tee2pkcs_add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "tee2pkcs_add_attribute",
    "tainted_vars": [
      "head",
      "pkcs11_id",
      "tee_obj",
      "tee_id",
      "a_ptr",
      "a_size",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "a_ptr,a_size",
        "rhs": "alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:372-374"
      },
      {
        "lhs": "head (attribute list)",
        "rhs": "add_attribute(head, pkcs11_id, a_ptr, a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:376-377"
      },
      {
        "lhs": "a_ptr (freed)",
        "rhs": "TEE_Free(a_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:378"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:372-374",
        "evidence": "checks rc after alloc_get_tee_attribute_data and goto out on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 497,
      "function": "tee2pkcs_add_attribute",
      "rule": "other",
      "why": "alias of priv_head (callee head) passed here originates from templates built from caller-provided data; head may contain REE-derived attributes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE, tee_obj, TEE_ATTR_ECC_PRIVATE_VALUE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "tee2pkcs_add_attribute",
      "rule": "other",
      "why": "alloc_get_tee_attribute_data returns TEE-allocated buffer a_ptr which is then copied into head via add_attribute; copied data may be secret (private key) or public depending on tee_id.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=head->attrs_size+sizeof(*head)"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    }
  ]
}

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_add_attribute at lines [376]:
-- Call #1 at line 376 --
374: goto out;
375:
376: >>> rc = add_attribute(head, pkcs11_id, a_ptr, a_size);
377:
378: TEE_Free(a_ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "serialize calls",
        "rhs": "serialize(bstart, &buf_len, &data32, sizeof(uint32_t)) / serialize(bstart, &buf_len, data, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:40-50"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "(*head)->attrs_size + 2 * sizeof(uint32_t) + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:55"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:31-59",
        "evidence": "no explicit bounds check on 'size' before serialize(bstart,...,data,size)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of head pointer passed from caller; head originates from attribute templates which may be REE-derived",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    },
    {
      "file": "/workspace/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 376,
      "function": "add_attribute",
      "rule": "other",
      "why": "data pointer (a_ptr) passed in originates from TEE alloc_get_tee_attribute_data (TEE-private) and is copied into attribute list",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = add_attribute(head, pkcs11_id, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serialize copies caller-controlled 'data' of length 'size' into buffer using buf_len without explicit prior bounds validation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) compute new length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data (source) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen",
        "rhs": "updated to nlen after successful copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing new buffer length"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "bstart alias points at head-derived buffer that originates from attribute list (may be REE-influenced) and is reallocated/expanded here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "bstart alias (attribute buffer) reused for subsequent serialize; caller-supplied size value influences resize and copy",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 49,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "data pointer (a_ptr) from TEE alloc_get_tee_attribute_data is copied by length 'size' into realloc'd buffer without upstream semantic validation of 'size' vs expected attr capacity",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf + *blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "destination pointer for copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "buf + *blen .. +len",
        "rhs": "data copied from 'data' via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing nlen"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination buffer 'buf + *blen' is alias of realloc'd bstart which originates from attribute buffer (caller-influenced); reallocation then used as copy target",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source 'data' may be caller-controlled (either local data32 or a TEE-allocated a_ptr); origin depends on callsite",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "length 'len' (copy size) is used to bound the copy after realloc; although integer-overflow and alloc checks exist, no semantic check ensures 'len' matches expected attribute capacity",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "TEE_MemMove copies 'len' bytes into a realloc'd buffer sized to *blen+len with integer-overflow and allocation checks; the copy operates on TA-private buffers (no REE-visible dst) so no plaintext REE leak at this call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TEE or caller-provided attribute data (a_ptr) or local data32",
      "propagation_path": [
        "params (REE) -> serialargs -> pub_template/priv_template @ processing.c:415-431",
        "template attrs -> pub_head/priv_head -> tee2pkcs_ec_attributes @ processing.c:653",
        "alloc_get_tee_attribute_data -> a_ptr @ processing.c:502",
        "a_ptr -> add_attribute -> serialize -> TEE_MemMove @ serializer.c:188"
      ],
      "sink": "TEE_MemMove(buf + *blen, data, len) at serializer.c:188"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls input templates/attributes passed via params to TA",
        "No higher-level enforcement preventing storing of large attributes"
      ],
      "attack_scenario": "Attacker supplies crafted attribute data/size; serialize resizes buffer and performs TEE_MemMove copying provided bytes into TA-managed attribute list.",
      "impact": "Potential corruption of TA-managed attribute list if upstream checks were absent; does not produce REE-visible plaintext from this line."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "add_attribute:attributes.c:49",
        "recommendation": "Validate 'size' against expected attribute-specific maximums before serializing into attribute buffer"
      },
      {
        "type": "type_validation",
        "location": "generate_ec_keys:processing_ec.c:614-622",
        "recommendation": "Ensure EC params sizes match expected curve parameters earlier and enforce attribute content semantics"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "ADD_OVERFLOW check prevents integer overflow when computing new length",
        "TEE_Realloc result is checked before copy"
      ],
      "negative_indicators": [
        "No semantic validation that 'size' matches expected attribute capacity at add_attribute callsite",
        "Source 'a_ptr' can contain sensitive private key bytes handled inside TA structures"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The memmove at line 188 is protected against integer overflow and allocation failures and copies into a TA-private buffer, so it is not a direct memory-safety or unencrypted-REE-output vulnerability at this site.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Integer-overflow and allocation checks precede the copy and the destination is TA-private, so no REE-visible plaintext leak or buffer overflow is evident at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:serializer.c:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents overflow"
    },
    {
      "type": "allocation_check",
      "location": "serialize:serializer.c:184-186",
      "evidence": "checks TEE_Realloc return and returns on NULL"
    },
    {
      "type": "type_validation",
      "location": "entry_generate_key_pair:processing.c:412-413",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to out_ref_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "data (serialize)",
      "why_safe": "Copied length 'len' is accounted for in nlen and allocation, preventing overflow at copy site",
      "evidence": "serializer.c:181-188"
    },
    {
      "arg": "bstart/blen",
      "why_safe": "Realloc resizes buffer to accommodate existing + new data before copy",
      "evidence": "serializer.c:184-191"
    }
  ],
  "residual_risks": [
    "add_attribute/serialize accept 'size' from upstream without attribute-specific semantic bounds checks (could allow excessively large attributes or unexpected content)",
    "Private key material is assembled into TA-managed structures (priv_head) earlier; later copies to REE-visible memory (if any) should be audited"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct checks for integer overflow and allocation before copy",
      "Copy target is TA-private buffer"
    ],
    "negative_indicators": [
      "Lack of semantic range checks on attribute 'size' at add_attribute",
      "Upstream data originates ultimately from REE parameters (tainted)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No memory-safety or unencrypted-REE-output issue is triggered at the specific TEE_MemMove call because of the pre-copy checks and TA-private destination; structural risks elsewhere remain and should be mitigated.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); handles are non-sensitive but destination is REE-visible",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "alias of caller-provided out->memref.buffer bound to hdl_ptr (shared buffer passed into helper)",
      "code_excerpt": "hdl_ptr = (uint32_t *)out->memref.buffer;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 649,
      "function": "generate_ec_keys",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "why": "add_attribute copies a_ptr (derived from REE-provided EC_PARAMS) into priv_head without additional semantic validation",
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 653,
      "function": "generate_ec_keys",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=tee_size,src_sz=tee_size,dst_sz=pub_head->attrs_size+priv_head->attrs_size"
        ]
      },
      "why": "tee2pkcs_ec_attributes extracts key material from tee_obj into pub_head/priv_head (sensitive key bytes handled in TA-managed structures)",
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "tee2pkcs_add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=head->attrs_size+sizeof(*head)"
        ]
      },
      "why": "alloc_get_tee_attribute_data returns buffer a_ptr which is copied into attribute list and then freed; copied data may include private key material",
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize copies caller-controlled 'data' of length 'size' into buffer using buf_len without explicit attribute-specific bounds validation",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "why": "length 'len' is used to bound the copy after realloc; semantic validation that 'len' matches expected attribute capacity is missing",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}
フロー #160: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> tee2pkcs_ec_attributes -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keystee2pkcs_ec_attributesadd_attributeserializeTEE_MemMove

実行時間: 102.32秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

詳細: The immediate sink at serializer.c:188 is protected against integer overflow and realloc failure, and copies into TA-private memory; therefore it is not classified as vulnerable for REE exfiltration or memory-safety at this line. Upstream weak input validation remains a structural concern.

信頼度: HIGH

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_ec_attributes at lines [572, 577, 649, 779]:
-- Call #1 at line 572 --
570: * for TEE_TYPE_ECDSA_KEYPAIR.
571: */
572: >>> rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT,
573: ecpoint, dersize);
574: if (rc)
-- Call #2 at line 577 --
575: goto ecpoint_cleanup;
576:
577: >>> rc = add_attribute(pub_head, PKCS11_CKA_EC_POINT, ecpoint, dersize);
578:
579: ecpoint_cleanup:
-- Call #3 at line 649 --
647:
648:
649: >>> rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
650: if (rc)
651: goto out;
-- Call #4 at line 779 --
777:
778:
779: >>> rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
780: if (rc)
781: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "*head",
      "buf_len",
      "bstart",
      "data",
      "size",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "data32 (attribute)",
        "rhs": "attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-41"
      },
      {
        "lhs": "data32 (size)",
        "rhs": "size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:44-46"
      },
      {
        "lhs": "serialize(bstart,...,data,size) effect",
        "rhs": "copies caller-provided data into buffer region derived from head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      },
      {
        "lhs": "(*head)->attrs_size,(*head)->attrs_count",
        "rhs": "updated based on size and successful serialize",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:54-56"
      }
    ],
    "sanitizers": [
      {
        "kind": "none",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:31-59",
        "evidence": "No explicit bounds check ensuring buf_len >= required space before serializing attribute/type/size/data"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 572,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of priv_head (obj_attrs from upstream templates potentially derived from REE) passed as head; callee will write into buffer computed from (*head)->attrs_size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=sizeof(struct obj_attrs)"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 577,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of pub_head passed as head; pub_head originated from caller templates (REE-derived) and is mutated here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=sizeof(struct obj_attrs)"
        ]
      },
      "code_excerpt": "rc = add_attribute(pub_head, PKCS11_CKA_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 649,
      "function": "add_attribute",
      "rule": "other",
      "why": "data pointer a_ptr (EC_PARAMS) originating from earlier get_attribute_ptr (which reads REE-derived template) passed into add_attribute as data to be serialized.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=(*head)->attrs_size+2*sizeof(uint32_t)+a_size"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serialize writes caller-provided data into buffer derived from (*head)->attrs_size without checking available space (buf_len) fits all serializations.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) computes new length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "data via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188-189"
      },
      {
        "lhs": "*blen,*bstart",
        "rhs": "updated to nlen and buf after successful realloc/move",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW prevents integer overflow when computing new buffer length"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "bstart at call-site aliases head-derived buffer (originating in add_attribute) and is reallocated/written into by serialize.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "blen (&buf_len) at call-site is used to compute new allocation size and is updated; its initial value derives from (*head)->attrs_size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=(*head)->attrs_size,dst_sz=nlen"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "serialize copies caller-provided data into reallocated buffer without validating data contents or semantic constraints (data may be REE-originated).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf",
      "bstart",
      "blen",
      "data",
      "len",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "destination pointer for copy",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "data -> buf + *blen",
        "rhs": "TEE_MemMove(buf + *blen, data, len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "overflow_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks and computes nlen before realloc"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc return and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "bstart-derived buffer (head-derived) is reallocated and used as destination; origin of bstart at call-site ties to upstream REE-derived templates.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "blen (buf_len) at call-site is updated and used to compute destination offset; initial blen derived from (*head)->attrs_size (upstream).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=(*head)->attrs_size,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies caller-provided data into TA-managed buffer without semantic validation of data contents (data originates from REE).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=nlen"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "serialize performs an ADD_OVERFLOW check and TEE_Realloc before copying, and destination is a TA-private buffer; source is caller-provided data (REE-derived in call chain) but this call does not copy data to REE.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params/templates -> a_ptr/ecpoint/data",
      "propagation_path": [
        "params (REE) -> templates -> proc_params / pub_template / priv_template @ processing.c:415-431",
        "ecpoint built from TEE attributes and a_ptr -> ecpoint @ processing_ec.c:533-564",
        "add_attribute called with data (ecpoint or a_ptr) -> serialize @ attributes.c:49",
        "serialize copies data via TEE_MemMove(buf + *blen, data, len) @ serializer.c:188"
      ],
      "sink": "TEE_MemMove copies data into TA-managed buffer (serializer.c:188)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted params/templates via REE that influence data and sizes"
      ],
      "attack_scenario": "Malformed REE-controlled attribute causes unexpected data to be serialized into TA buffer; however integer-overflow and realloc checks mitigate direct overflow at this call.",
      "impact": "Possible corruption of TA-managed attr structures or denial of service if upstream validations missing, but not direct REE exfiltration at this sink."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "add_attribute:unknown",
        "recommendation": "Validate that (*head)->attrs_size and buf_len reflect sufficient/expected capacity semantics before serializing (sanity checks on max sizes)."
      },
      {
        "type": "range_check",
        "location": "add_attribute:attributes.c:34-49",
        "recommendation": "Enforce upper bounds on attribute sizes (len) and total attribute list size to avoid resource exhaustion."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialize uses ADD_OVERFLOW to compute nlen and checks TEE_Realloc return before copy"
      ],
      "negative_indicators": [
        "add_attribute relies on (*head)->attrs_size and does not validate overall capacity semantics before serialize",
        "data originates from REE-derived templates in some call paths"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The immediate sink at serializer.c:188 is protected against integer overflow and realloc failure, and copies into TA-private memory; therefore it is not classified as vulnerable for REE exfiltration or memory-safety at this line. Upstream weak input validation remains a structural concern.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "ADD_OVERFLOW and TEE_Realloc checks in serialize prevent overflow/wrong-size copy into TA memory; the call copies into TA-private buffer and does not write to REE.",
  "effective_sanitizers": [
    {
      "type": "overflow_check",
      "location": "serialize:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen)"
    },
    {
      "type": "allocation_check",
      "location": "serialize:184-186",
      "evidence": "checks TEE_Realloc return and returns on NULL"
    }
  ],
  "argument_safety": [
    {
      "arg": "data",
      "why_safe": "serialize treats data as opaque bytes and bounds the allocation via ADD_OVERFLOW before copying",
      "evidence": "serializer.c:181-189"
    },
    {
      "arg": "buf + *blen",
      "why_safe": "destination offset computed after overflow-checked nlen and successful realloc",
      "evidence": "serializer.c:181-186,188-191"
    }
  ],
  "residual_risks": [
    "Line 555-556/366: copies from TA-private to REE-visible buffers (handle/rc writes) exist elsewhere in call chain; ensure sensitive TA-private secrets are not placed into REE buffers",
    "add_attribute lacks pre-serialize semantic checks on (*head)->attrs_size and aggregate attribute list size"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit overflow and allocation checks in serialize",
      "Destination memory is TA-private"
    ],
    "negative_indicators": [
      "Upstream lack of semantic validation in add_attribute",
      "Some data (ecpoint) includes secret material derived from TEE key object"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The sink at serializer.c:188 is defended against overflow and writes to TA-private memory; therefore not a vulnerable sink. Structural issues upstream (weak validation, handling of secret key material in attributes) are noted as residual risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize writes caller-provided data into buffer derived from (*head)->attrs_size without prior semantic bounds/upper-limit checks.",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 572,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "why": "Adds EC_POINT (derived from TEE key material) into priv_head; this handles secret key-related bytes in TA-managed attribute structures.",
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies key handles into caller-provided out buffer (REE-visible); ensure no TA-private secret is placed into this buffer.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #161: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keysadd_attributeserializeTEE_MemMove

実行時間: 120.03秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

安全判定理由: Integer-overflow and allocation checks (ADD_OVERFLOW and TEE_Realloc) prevent buffer overflow at this TEE_MemMove site and the destination is TA-private, so no direct unencrypted REE output occurs here.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_ec_keys at lines [649, 779]:
-- Call #1 at line 649 --
647:
648:
649: >>> rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
650: if (rc)
651: goto out;
-- Call #2 at line 779 --
777:
778:
779: >>> rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
780: if (rc)
781: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "data32",
        "rhs": "attribute then size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-46"
      },
      {
        "lhs": "attrs region growth",
        "rhs": "serialize calls writing attribute id, size, and data into buffer at bstart",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-51"
      },
      {
        "lhs": "(*head)->attrs_size",
        "rhs": "(*head)->attrs_size + 2 * sizeof(uint32_t) + size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:54-56"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34",
        "evidence": "buf_len computed from current attrs_size but no explicit upper-limit check before serializes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 649,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of priv_head (callee 'head') passed from generate_ec_keys; origin is TA-managed structures built from REE-provided templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 649,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of a_ptr (callee 'data') passed from generate_ec_keys; a_ptr derived from REE-provided EC_PARAMS",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 779,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of priv_head (callee 'head') passed from generate_ec_keys at second call-site; same origin as above",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 779,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of a_ptr (callee 'data') passed from generate_ec_keys at second call-site; a_ptr derived from REE-provided EC_PARAMS",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=a_size,src_sz=a_size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serialize(bstart, &buf_len, data, size) writes caller-controlled data into buffer computed from attrs_size without explicit checks for overflow against available buffer",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) computed sum of existing length and incoming len",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data with length len copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188-189"
      },
      {
        "lhs": "*blen",
        "rhs": "nlen after successful realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW checks for overflow when computing new buffer length"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks TEE_Realloc result and returns on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee bstart to add_attribute's bstart (pointer to head) which originates from TA-managed object pointer possibly built from REE templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee blen to add_attribute's buf_len (derived from (*head)->attrs_size)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee data to &data32 (local stack value) for attribute id copy; data is TA-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=*blen + sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee bstart to add_attribute's bstart (same as previous call-site)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee blen to add_attribute's buf_len (derived from (*head)->attrs_size)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee data to &data32 (local stack value) for attribute size copy; data is TA-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=*blen + sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee bstart to add_attribute's bstart (same pointer used for data appends)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "binds callee blen to add_attribute's buf_len (accumulated attrs size), which determines copy offset",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "serialize copies caller-provided data (len from caller) into realloc'd buffer; although ADD_OVERFLOW prevents arithmetic wrap, there is limited validation of len against expected attribute semantics",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf",
      "buf + *blen",
      "data",
      "len",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "buf + *blen",
        "rhs": "destination pointer computed from current *blen offset into realloc'd buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data (len bytes) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer wrap when computing new buffer length"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "checks result of TEE_Realloc and returns on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pointer is buf + *blen into TA-allocated buffer (result of TEE_Realloc); binds callee dest to TA-private buffer used as serialization target",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies 'data' of length len into buffer; 'data' may originate from REE (e.g., EC_PARAMS via a_ptr) and len is caller-controlled without semantic validation",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "serialize performs ADD_OVERFLOW on (*blen + len) and TEE_Realloc to nlen before copying, ensuring the destination buffer is enlarged to hold len bytes; the destination is TA-private, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Integer-overflow and allocation checks (ADD_OVERFLOW and TEE_Realloc) prevent buffer overflow at this TEE_MemMove site and the destination is TA-private, so no direct unencrypted REE output occurs here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents arithmetic wrap when computing new buffer length"
    },
    {
      "type": "allocation_check",
      "location": "serialize:184-186",
      "evidence": "checks TEE_Realloc result and returns on NULL"
    }
  ],
  "argument_safety": [
    {
      "arg": "data,len",
      "why_safe": "serialize uses len only after ADD_OVERFLOW and alloc; copy fits into allocated region",
      "evidence": "serializer.c:181-189"
    },
    {
      "arg": "buf + *blen",
      "why_safe": "buf is result of TEE_Realloc to nlen = *blen + len, so offset is within allocated region",
      "evidence": "serializer.c:181-189"
    }
  ],
  "residual_risks": [
    "Higher-level weak_input_validation issues remain: upstream serialize/add_attribute accept caller-controlled 'len' and data (EC_PARAMS) with limited semantic validation",
    "Separately, other TEE_MemMove calls copy TA-local secrets/handles to REE-visible buffers (e.g., processing.c:555-556) — risk not at this sink line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Presence of ADD_OVERFLOW check before computing nlen",
      "Allocation result of TEE_Realloc is checked",
      "Copy target is TA-private buffer"
    ],
    "negative_indicators": [
      "serialize blindly copies caller-provided data bytes without semantic validation of content or size limits beyond arithmetic",
      "Upstream data (a_ptr) may originate from REE, so higher-level flows could expose sensitive data elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety defenses (overflow check + realloc) directly address the risk at this TEE_MemMove site and destination is TA-private; therefore the line itself is not vulnerable though upstream weak input validation remains a structural concern.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serialize(bstart, &buf_len, data, size) writes caller-controlled data into buffer computed from attrs_size without semantic validation of 'size' or content",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 653,
      "function": "generate_ec_keys",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=tee_size,src_sz=tee_size,dst_sz=pub_head->attrs_size+priv_head->attrs_size"
        ]
      },
      "why": "tee2pkcs_ec_attributes extracts key material from tee_obj into pub_head/priv_head (handling secret key bytes in TA-managed structures)",
      "code_excerpt": "rc = tee2pkcs_ec_attributes(pub_head, priv_head, tee_obj, tee_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk of exposing handles to REE",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #162: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_eddsa_keys -> add_attribute -> serialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_eddsa_keysadd_attributeserializeTEE_MemMove

実行時間: 106.57秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188

パラメータインデックス: 0

解析結果

安全判定理由: Numeric overflow and allocation are checked prior to TEE_MemMove; destination is TA-private so no unencrypted REE output at this call site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: add_attribute
プロンプト 中間 (add_attribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “add_attribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_eddsa_keys at lines [779]:
-- Call #1 at line 779 --
777:
778:
779: >>> rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);
780: if (rc)
781: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c

31: enum pkcs11_rc add_attribute(struct obj_attrs **head, uint32_t attribute,
32: void *data, size_t size)
33: { 34: size_t buf_len = sizeof(struct obj_attrs) + (*head)->attrs_size; 35: char **bstart = (void *)head; 36: enum pkcs11_rc rc = PKCS11_CKR_OK; 37: uint32_t data32 = 0; 38: 39: data32 = attribute; 40: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 41: if (rc) 42: return rc; 43: 44: data32 = size; 45: rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t)); 46: if (rc) 47: return rc; 48: 49: rc = serialize(bstart, &buf_len, data, size); 50: if (rc) 51: return rc; 52: 53: 54: head = (void *)bstart; 55: (*head)->attrs_size += 2 * sizeof(uint32_t) + size; 56: (*head)->attrs_count++; 57: 58: return rc; 59: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "add_attribute", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"add_attribute", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (add_attribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "add_attribute",
    "tainted_vars": [
      "head",
      "attribute",
      "data",
      "size",
      "buf_len",
      "bstart",
      "data32"
    ],
    "propagation": [
      {
        "lhs": "buf_len",
        "rhs": "sizeof(struct obj_attrs) + (*head)->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:34"
      },
      {
        "lhs": "bstart",
        "rhs": "(void *)head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:35"
      },
      {
        "lhs": "data32",
        "rhs": "attribute",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:39-41"
      },
      {
        "lhs": "data32",
        "rhs": "size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:44-46"
      },
      {
        "lhs": "serialize(bstart, &buf_len, data, size)",
        "rhs": "data (caller-provided pointer, size 'size')",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c:49-51"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 779,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of caller-provided priv_head pointer passed into add_attribute from generate_eddsa_keys",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 779,
      "function": "add_attribute",
      "rule": "other",
      "why": "alias of caller-provided a_ptr (attribute payload) passed into add_attribute; origin from earlier attribute parsing",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=a_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_EC_PARAMS, a_ptr, a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "rule": "weak_input_validation",
      "why": "serializes caller-supplied data of length 'size' into buffer computed from head without an explicit bounds check against that size",
      "sink_function": "serialize",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    }
  ]
}

関数: serialize
プロンプト 中間 (serialize)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “serialize” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from add_attribute at lines [40, 45, 49]:
-- Call #1 at line 40 --
38:
39: data32 = attribute;
40: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
41: if (rc)
42: return rc;
-- Call #2 at line 45 --
43:
44: data32 = size;
45: >>> rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));
46: if (rc)
47: return rc;
-- Call #3 at line 49 --
47: return rc;
48:
49: >>> rc = serialize(bstart, &buf_len, data, size);
50: if (rc)
51: return rc;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

176: enum pkcs11_rc serialize(char **bstart, size_t *blen, void *data, size_t len)
177: { 178: char *buf = NULL; 179: size_t nlen = 0; 180: 181: if (ADD_OVERFLOW(*blen, len, &nlen)) 182: return PKCS11_CKR_ARGUMENTS_BAD; 183: 184: buf = TEE_Realloc(*bstart, nlen); 185: if (!buf) 186: return PKCS11_CKR_DEVICE_MEMORY; 187: 188: TEE_MemMove(buf + *blen, data, len); 189: 190: *blen = nlen; 191: *bstart = buf; 192: 193: return PKCS11_CKR_OK; 194: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "serialize", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"serialize", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (serialize)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "serialize",
    "tainted_vars": [
      "bstart",
      "blen",
      "data",
      "len",
      "buf",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "nlen",
        "rhs": "ADD_OVERFLOW(*blen, len, &nlen) check computes new length",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182"
      },
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data copied of length len via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188-189"
      },
      {
        "lhs": "*blen",
        "rhs": "nlen after successful realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing nlen"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "TEE_Realloc result is checked for NULL and returns error on allocation failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 40,
      "function": "serialize",
      "rule": "other",
      "why": "bstart argument aliases caller-managed buffer pointer from add_attribute (TA-managed), binding into serialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(char**),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 45,
      "function": "serialize",
      "rule": "other",
      "why": "blen argument aliases local buf_len from add_attribute (TA-managed) passed into serialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, &data32, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "serialize",
      "rule": "other",
      "why": "data argument may originate from REE (a_ptr) in one call and from TA-local (data32) in others; aliasing binds REE-visible payload into serialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "rule": "weak_input_validation",
      "why": "copies caller-controlled 'data' of length 'len' into buffer at offset *blen; although integer overflow and allocation are checked, there is no explicit validation of 'len' relative to expected attribute semantics",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from serialize at lines [188]:
-- Call #1 at line 188 --
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c

// Call at line 188:
183:
184: buf = TEE_Realloc(*bstart, nlen);
185: if (!buf)
186: return PKCS11_CKR_DEVICE_MEMORY;
187:
188: >>> TEE_MemMove(buf + *blen, data, len);
189:
190: *blen = nlen;
191: *bstart = buf;
192:
193: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buf",
      "*blen",
      "buf + *blen",
      "data",
      "len",
      "nlen"
    ],
    "propagation": [
      {
        "lhs": "buf",
        "rhs": "TEE_Realloc(*bstart, nlen)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186"
      },
      {
        "lhs": "destination (buf + *blen)",
        "rhs": "buf and *blen computed earlier",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "memory at buf + *blen",
        "rhs": "data copied of length len via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:188"
      },
      {
        "lhs": "*blen",
        "rhs": "nlen after successful realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:190-191"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:181-182",
        "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing nlen"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c:184-186",
        "evidence": "TEE_Realloc result is checked for NULL and error returned on allocation failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination pointer is alias into TA-allocated buffer 'buf' produced by TEE_Realloc; binding buf+*blen into copy",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source 'data' may originate from REE (caller-provided attribute payload) and is passed into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "copies caller-controlled data of length 'len' into TA buffer at offset *blen; although overflow and allocation are checked, there is no semantic validation of 'len' vs expected attribute semantics",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [188]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [188] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      188
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Integer-overflow check (ADD_OVERFLOW) and TEE_Realloc ensure destination buffer is resized to *blen+len before the copy; source 'data' may be REE-origin but copy goes into TA-private buffer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Numeric overflow and allocation are checked prior to TEE_MemMove; destination is TA-private so no unencrypted REE output at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "serialize:181-182",
      "evidence": "ADD_OVERFLOW(*blen, len, &nlen) prevents integer overflow when computing nlen"
    },
    {
      "type": "allocation_check",
      "location": "serialize:184-186",
      "evidence": "TEE_Realloc(*bstart, nlen) result is checked for NULL and error returned on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "data",
      "why_safe": "Copied into TA-allocated buffer after overflow/allocation checks",
      "evidence": "serializer.c:181-189"
    },
    {
      "arg": "buf + *blen",
      "why_safe": "Destination buffer was realloc'd to nlen=*blen+len",
      "evidence": "serializer.c:184-191"
    }
  ],
  "residual_risks": [
    "serialize and upstream functions perform copies of caller-controlled data into TA structures with no semantic/attribute-length validation (weak_input_validation).",
    "Later code copies TA-managed key handles into REE-visible buffers (other sink lines) which are not evaluated here."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "ADD_OVERFLOW check before resizing",
      "TEE_Realloc checked for allocation failure"
    ],
    "negative_indicators": [
      "source 'data' can originate from REE (caller-provided attribute payload)",
      "no semantic validation of 'len' vs expected attribute semantics"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety protections (overflow check + realloc) prevent buffer overflow at this TEE_MemMove; destination is TA-private so this call alone is not an information-disclosure to REE—thus not classified as vulnerable for the evaluated sink.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/attributes.c",
      "line": 49,
      "function": "add_attribute",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=buf_len"
        ]
      },
      "why": "serializes caller-supplied data of length 'size' into buffer computed from head without explicit semantic validation of 'size'.",
      "code_excerpt": "rc = serialize(bstart, &buf_len, data, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/serializer.c",
      "line": 188,
      "function": "serialize",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=len,src_sz=len,dst_sz=*blen + len"
        ]
      },
      "why": "copies caller-controlled data of length 'len' into TA buffer; lacks attribute-specific length validation though integer overflow/allocation are checked.",
      "code_excerpt": "TEE_MemMove(buf + *blen, data, len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 783,
      "function": "generate_eddsa_keys",
      "sink_function": "tee2pkcs_add_attribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:key",
          "size_triplet:copy_len=unknown,src_sz=tee_size,dst_sz=(*priv_head)->attrs_size"
        ]
      },
      "why": "private key material from TEE object is incorporated into TA attributes (sensitive key material inside TA); ensure it isn't later exposed to REE.",
      "code_excerpt": "tee2pkcs_add_attribute(priv_head, PKCS11_CKA_VALUE, tee_obj, TEE_ATTR_ED25519_PRIVATE_VALUE);"
    }
  ]
}
フロー #163: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretgenerate_random_key_valueTEE_MemMove

実行時間: 47.81秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:184

パラメータインデックス: 0

解析結果

詳細: Line 184 performs a bounded, type-checked copy into a TA-private uint32_t; thus it is not a direct vulnerability. However, downstream use of the resulting value_len for allocation is a structural risk.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_random_key_value at lines [184, 322, 555, 556, 1046]:
-- Call #1 at line 184 --
182: return PKCS11_CKR_ATTRIBUTE_VALUE_INVALID;
183: }
184: >>> TEE_MemMove(&value_len, data, data_size);
185:
186:
-- Call #2 at line 322 --
320: head = NULL;
321:
322: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
323: out->memref.size = sizeof(obj_handle);
324:
-- Call #3 at line 555 --
553: hdl_ptr = (uint32_t *)out->memref.buffer;
554:
555: >>> TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
-- Call #4 at line 556 --
554:
555: TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: >>> TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
558: DMSG("PKCS11 session %"PRIu32": create key pair %#"PRIx32"/%#"PRIx32,
-- Call #5 at line 1046 --
1044: head = NULL;
1045:
1046: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1047: out->memref.size = sizeof(obj_handle);
1048:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at line 184:
179: DMSG("%s", rc ? "No attribute value_len found" :
180: "Invalid size for attribute VALUE_LEN");
181:
182: return PKCS11_CKR_ATTRIBUTE_VALUE_INVALID;
183: }
184: >>> TEE_MemMove(&value_len, data, data_size);
185:
186:
187: rc = remove_empty_attribute(head, PKCS11_CKA_VALUE);
188: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
189: return PKCS11_CKR_GENERAL_ERROR;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "first parameter of TEE_MemMove (call-site bind)",
        "site": "multiple call-sites: processing.c:184,322,555,556,1046"
      },
      {
        "lhs": "src",
        "rhs": "second parameter of TEE_MemMove (call-site bind)",
        "site": "multiple call-sites: processing.c:184,322,555,556,1046"
      },
      {
        "lhs": "len",
        "rhs": "third parameter of TEE_MemMove (call-site bind)",
        "site": "multiple call-sites: processing.c:184,322,555,556,1046"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 184,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: src 'data' originates from attribute buffer (serialargs/template) likely originating from REE; copied into local value_len (stack) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=data_size,src_sz=data_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&value_len, data, data_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination out->memref.buffer is caller-provided REE-visible buffer; obj_handle (TEE-private) copied into it.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: hdl_ptr aliases out->memref.buffer (REE-visible); pubkey_handle (TEE-private) copied into that shared buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: hdl_ptr+1 aliases out->memref.buffer (REE-visible); privkey_handle (TEE-private) copied into that shared buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1046,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: out->memref.buffer (REE-visible) receives obj_handle copied from TEE-private storage via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [184]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [184] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      184
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 184,
      "function": "generate_random_key_value",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Source 'data' length (data_size) is validated to equal sizeof(uint32_t) before copying into local value_len, so copy length and destination size are consistent and destination is TA-private and non-sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "attribute buffer from template/serialargs (caller-controlled)",
      "propagation_path": [
        "params -> template/serialargs -> attribute data (processing.c:226-237)",
        "get_attribute_ptr returns data,data_size (processing.c:177)",
        "TEE_MemMove(&value_len, data, data_size) (processing.c:184)"
      ],
      "sink": "TEE_MemMove copies data_size bytes into local value_len"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed attribute where data_size != sizeof(uint32_t) (already checked)"
      ],
      "attack_scenario": "Not applicable: size check prevents overruns; copied value_len is later used to allocate memory which may be risky if unchecked.",
      "impact": "None at this line; potential downstream issues if value_len is large and unchecked during allocation"
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "generate_random_key_value:191",
        "recommendation": "Validate a reasonable upper bound on value_len before using it to allocate memory (e.g., ensure value_len <= MAX_ALLOWED_KEY_LEN)"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit check data_size == sizeof(uint32_t) before TEE_MemMove",
        "Destination is local scalar (value_len), not REE-visible"
      ],
      "negative_indicators": [
        "Attribute data originates from caller/template (REE-provided)",
        "value_len later used in TEE_Malloc without explicit upper bound check"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Line 184 performs a bounded, type-checked copy into a TA-private uint32_t; thus it is not a direct vulnerability. However, downstream use of the resulting value_len for allocation is a structural risk.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 184 is protected by an explicit size/type check ensuring data_size == sizeof(uint32_t), and the destination is TA-private and non-sensitive.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "generate_random_key_value:177-184",
      "evidence": "checks data_size == sizeof(uint32_t) before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "data,data_size",
      "why_safe": "data_size validated to match expected sizeof(uint32_t) before use",
      "evidence": "processing.c:177-184"
    }
  ],
  "residual_risks": [
    "191: value_len (derived from REE-origin attribute) is used to TEE_Malloc without upper bound check — potential allocation-size-related issues"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size/type check before copy"
    ],
    "negative_indicators": [
      "Upstream source is REE-originated attribute",
      "Downstream unchecked allocation using derived value_len"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The sink at line 184 is safe due to validation; remaining risk is structural and arises later when value_len is used for allocation without range checks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "why": "value_len derived from caller-provided attribute is used to allocate memory without an explicit upper bound check",
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 294,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "caller 'head' pointer is passed by address into generate_random_key_value; provenance (REE vs TEE) of pointed data is not fully proven",
      "code_excerpt": "rc = generate_random_key_value(&head);"
    }
  ]
}
フロー #164: TA_InvokeCommandEntryPoint -> entry_generate_secret -> generate_random_key_value -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_generate_secretgenerate_random_key_valueTEE_GenerateRandom

実行時間: 55.97秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:195

パラメータインデックス: 0

解析結果

詳細: No information disclosure or buffer overflow occurs at the TEE_GenerateRandom call: buffer is TA-private and filled with random bytes; primary issue is lack of an upper bound on value_len leading to resource exhaustion, which is a structural risk rather than an exploit at this sink.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_random_key_value at lines [195]:
-- Call #1 at line 195 --
193: return PKCS11_CKR_DEVICE_MEMORY;
194:
195: >>> TEE_GenerateRandom(value, value_len);
196:
197: rc = add_attribute(head, PKCS11_CKA_VALUE, value, value_len);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at line 195:
190:
191: value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);
192: if (!value)
193: return PKCS11_CKR_DEVICE_MEMORY;
194:
195: >>> TEE_GenerateRandom(value, value_len);
196:
197: rc = add_attribute(head, PKCS11_CKA_VALUE, value, value_len);
198:
199: TEE_Free(value);
200:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_GenerateRandom", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_GenerateRandom", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "value",
      "value_len"
    ],
    "propagation": [
      {
        "lhs": "value",
        "rhs": "TEE_Malloc(value_len, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191-193"
      },
      {
        "lhs": "value (filled)",
        "rhs": "TEE_GenerateRandom(value, value_len)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:195"
      }
    ],
    "sanitizers": [
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191-193",
        "evidence": "checks if TEE_Malloc returned NULL and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 195,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "callee buffer parameter is an alias of a TEE_Malloc'd buffer (TEE-private) passed into TEE_GenerateRandom",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=value_len,src_sz=value_len,dst_sz=value_len"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(value, value_len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [195]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [195] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      195
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 195,
      "function": "generate_random_key_value",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "TEE_GenerateRandom writes random bytes into a TA-allocated buffer (TEE-private) filled by TEE_Malloc; the data is random (non-sensitive by default) and not written to REE at this call site, and no bounds/overflow occurs here though allocation size is derived from unbounded attribute.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "VALUE_LEN attribute (originating from template/serialargs populated from REE)",
      "propagation_path": [
        "A -> data @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:177-184",
        "data -> value_len via TEE_MemMove @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:184",
        "value_len -> value via TEE_Malloc @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191",
        "value -> TEE_GenerateRandom(value, value_len) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:195"
      ],
      "sink": "TEE_GenerateRandom called with TA-private buffer and length value_len"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls VALUE_LEN attribute in template/serialargs",
        "No upper bound on value_len enforced"
      ],
      "attack_scenario": "Attacker supplies a very large VALUE_LEN causing excessive allocation or resource exhaustion during TEE_Malloc/TEE_GenerateRandom",
      "impact": "Denial of service (memory exhaustion) or failed operation; no immediate plaintext disclosure from this call"
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "generate_random_key_value:191",
        "recommendation": "Validate value_len against a reasonable maximum (e.g., algorithm/key-type limits) before TEE_Malloc"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "value_len is derived from caller-controlled attribute (serialargs)",
        "no explicit upper-bound check on value_len before allocation"
      ],
      "negative_indicators": [
        "data_size is validated to be sizeof(uint32_t) before copying",
        "TEE_Malloc NULL-check present"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "No information disclosure or buffer overflow occurs at the TEE_GenerateRandom call: buffer is TA-private and filled with random bytes; primary issue is lack of an upper bound on value_len leading to resource exhaustion, which is a structural risk rather than an exploit at this sink.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_GenerateRandom produces non-sensitive random data into a TA-private buffer and there is no evidence of that buffer being copied to REE at this line; memory-safety (overflow) is not observed here.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "generate_random_key_value:177-184",
      "evidence": "checks data_size == sizeof(uint32_t) before TEE_MemMove into value_len"
    },
    {
      "type": "null_check",
      "location": "generate_random_key_value:191-193",
      "evidence": "checks TEE_Malloc returned NULL and returns error"
    }
  ],
  "argument_safety": [
    {
      "arg": "*head",
      "why_safe": "function checks non-NULL *head at start",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:174-176"
    },
    {
      "arg": "value (buffer)",
      "why_safe": "allocated in TA memory (TEE_Malloc) and used internally before being added to object attributes",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:191-197"
    }
  ],
  "residual_risks": [
    "191: value_len from REE-derived attribute lacks an upper bound -> potential resource exhaustion or later disclosure when attribute is stored/returned"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "traceable propagation from REE-derived attribute to allocation length",
      "absence of explicit range check on value_len"
    ],
    "negative_indicators": [
      "value is TA-private and random (non-sensitive) at this call",
      "malloc NULL-check exists"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Call is not a vulnerability for information disclosure or buffer overflow at this line; primary concern is unbounded allocation size derived from untrusted input, classified as a structural weak_input_validation risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 191,
      "function": "generate_random_key_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=value_len,src_sz=data_size,dst_sz=value_len"
        ]
      },
      "why": "value_len derived from a caller-controlled attribute is used as allocation size without an explicit upper bound check",
      "code_excerpt": "value = TEE_Malloc(value_len, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 294,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "caller binds &head into generate_random_key_value; origin of head not proven TEE-private",
      "code_excerpt": "rc = generate_random_key_value(&head);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "entry_generate_secret",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "obj_handle (TA-private) is copied into caller-provided out memref (REE-visible); rc already validated out->memref.size == sizeof(obj_handle)",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #165: TA_InvokeCommandEntryPoint -> entry_generate_secret -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretTEE_MemMove

実行時間: 59.41秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 322 is size-checked (out->memref.size == sizeof(obj_handle)) and transfers a non-sensitive TA-local handle to REE, so neither a bounds violation nor unencrypted secret leakage is supported.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_secret at lines [322, 555, 556, 1046]:
-- Call #1 at line 322 --
320: head = NULL;
321:
322: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
323: out->memref.size = sizeof(obj_handle);
324:
-- Call #2 at line 555 --
553: hdl_ptr = (uint32_t *)out->memref.buffer;
554:
555: >>> TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
-- Call #3 at line 556 --
554:
555: TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: >>> TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
558: DMSG("PKCS11 session %"PRIu32": create key pair %#"PRIx32"/%#"PRIx32,
-- Call #4 at line 1046 --
1044: head = NULL;
1045:
1046: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1047: out->memref.size = sizeof(obj_handle);
1048:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at line 322:
317: * We reset head to NULL as it is no more the buffer owner and would
318: * be freed at function out.
319: */
320: head = NULL;
321:
322: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
323: out->memref.size = sizeof(obj_handle);
324:
325: DMSG("PKCS11 session %"PRIu32": generate secret %#"PRIx32,
326: session->handle, obj_handle);
327:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "out->memref.buffer",
      "hdl_ptr",
      "obj_handle",
      "pubkey_handle",
      "privkey_handle"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "out->memref.buffer (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322"
      },
      {
        "lhs": "src",
        "rhs": "&obj_handle (local TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322"
      },
      {
        "lhs": "dest",
        "rhs": "hdl_ptr (alias of out->memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:553-556"
      },
      {
        "lhs": "src",
        "rhs": "&pubkey_handle / &privkey_handle (local TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555-556"
      },
      {
        "lhs": "dest",
        "rhs": "out->memref.buffer (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1046"
      },
      {
        "lhs": "src",
        "rhs": "&obj_handle (local TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:1046"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:322,323",
        "evidence": "out->memref.size set/checked earlier to sizeof(obj_handle)"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:553-556",
        "evidence": "hdl_ptr derived from out->memref.buffer; caller must ensure buffer size (checked elsewhere)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination is caller-provided out->memref.buffer (REE-visible) bound to TEE_MemMove dest parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source is &obj_handle (TA-local) bound to TEE_MemMove src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination hdl_ptr is alias of out->memref.buffer (caller-provided REE-visible) bound to dest.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source &pubkey_handle is TA-local bound to src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination hdl_ptr + 1 writes into caller-provided buffer (REE-visible) via dest parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source &privkey_handle is TA-local bound to src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1046,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination out->memref.buffer (caller-provided REE-visible) bound to dest parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1046,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source &obj_handle is TA-local bound to src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [322]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [322] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      322
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 322,
      "function": "entry_generate_secret",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination out->memref.buffer is REE-visible but out->memref.size was validated to equal sizeof(obj_handle) before the call and the source is a TA-local small obj_handle (no sensitive secret), so copy is bounds-checked and not sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 322 is size-checked (out->memref.size == sizeof(obj_handle)) and transfers a non-sensitive TA-local handle to REE, so neither a bounds violation nor unencrypted secret leakage is supported.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_secret:222-224",
      "evidence": "checks ptypes == expected types and out->memref.size == sizeof(obj_handle)"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated equals sizeof(obj_handle)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:222-224"
    },
    {
      "arg": "&obj_handle",
      "why_safe": "local TA-managed integer handle, not derived from REE secrets",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:310-323"
    }
  ],
  "residual_risks": [
    "Line 322 writes TA-local object handles to REE-visible memory; if future changes make obj_handle contain sensitive material this would require re-evaluation."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit check out->memref.size == sizeof(obj_handle) before copy",
      "obj_handle is created within TA (create_object) and used as handle, not a secret"
    ],
    "negative_indicators": [
      "Destination is REE-visible shared memory (requires trusting earlier validation of ptypes and sizes)",
      "Some related buffers/params originate from REE and must be validated at call sites"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: bounds check ensures safe copy length; sensitivity check shows no secret data is copied, so no unencrypted_output; therefore line 322 is not vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer (REE-visible); size checked earlier but destination is shared memory.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "entry_generate_secret",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes TA-local object handle into REE-visible out->memref.buffer; bounds checked but structurally exposes TA-managed handle to REE.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}
フロー #166: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> tee2pkcs_rsa_attributes -> tee2pkcs_add_attribute -> alloc_get_tee_attribute_data -> TEE_GetObjectBufferAttribute
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keystee2pkcs_rsa_attributestee2pkcs_add_attributealloc_get_tee_attribute_dataTEE_GetObjectBufferAttribute

実行時間: 75.89秒

ターゲットシンク情報

シンク関数: TEE_GetObjectBufferAttribute

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344, 352

パラメータインデックス: 0

解析結果

詳細: Calls at lines 344 and 352 operate on TEE object attributes into TA-private memory with proper probe/allocation/error checks; they do not directly export data to REE, so they are not vulnerable per policy.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: alloc_get_tee_attribute_data
プロンプト 中間 (alloc_get_tee_attribute_data)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_get_tee_attribute_data” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_add_attribute at lines [372]:
-- Call #1 at line 372 --
370: size_t a_size = 0;
371:
372: >>> rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);
373: if (rc)
374: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

336: enum pkcs11_rc alloc_get_tee_attribute_data(TEE_ObjectHandle tee_obj,
337: uint32_t attribute,
338: void **data, size_t *size)
339: { 340: TEE_Result res = TEE_ERROR_GENERIC; 341: void *ptr = NULL; 342: size_t sz = 0; 343: 344: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz); 345: if (res != TEE_ERROR_SHORT_BUFFER) 346: return PKCS11_CKR_FUNCTION_FAILED; 347: 348: ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO); 349: if (!ptr) 350: return PKCS11_CKR_DEVICE_MEMORY; 351: 352: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz); 353: if (res) { 354: TEE_Free(ptr); 355: } else { 356: *data = ptr; 357: *size = sz; 358: } 359: 360: return tee2pkcs_error(res); 361: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_get_tee_attribute_data", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_get_tee_attribute_data", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_get_tee_attribute_data)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_get_tee_attribute_data",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "data",
      "size",
      "ptr",
      "sz",
      "res"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351"
      },
      {
        "lhs": "res, ptr",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz) -> on success *data=ptr; *size=sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      },
      {
        "lhs": "return value",
        "rhs": "tee2pkcs_error(res)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:360"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "Checks for TEE_ERROR_SHORT_BUFFER from first TEE_GetObjectBufferAttribute before allocating"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351",
        "evidence": "Checks ptr != NULL and returns PKCS11_CKR_DEVICE_MEMORY if allocation fails"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "tee_obj handle passed from caller into alloc_get_tee_attribute_data; origin is TEE key object handle (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "data out-parameter (&a_ptr) provided by caller is bound to allocated buffer returned by TEE_Malloc and later assigned to *data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO); ... *data = ptr; *size = sz;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "size out-parameter (&a_size) bound to actual attribute size (sz) filled by TEE_GetObjectBufferAttribute",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=sz,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz); ... *size = sz;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "Copies object attribute into allocated buffer via TEE_GetObjectBufferAttribute; provenance is TEE object attribute (TEE-private)",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    }
  ]
}

関数: TEE_GetObjectBufferAttribute
プロンプト 中間 (TEE_GetObjectBufferAttribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GetObjectBufferAttribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_get_tee_attribute_data at lines [344, 352]:
-- Call #1 at line 344 --
342: size_t sz = 0;
343:
344: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345: if (res != TEE_ERROR_SHORT_BUFFER)
346: return PKCS11_CKR_FUNCTION_FAILED;
-- Call #2 at line 352 --
350: return PKCS11_CKR_DEVICE_MEMORY;
351:
352: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at lines [344, 352]:
339:     {
340:     	TEE_Result res = TEE_ERROR_GENERIC;
341:     	void *ptr = NULL;
342:     	size_t sz = 0;
343:     
344: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345:     	if (res != TEE_ERROR_SHORT_BUFFER)
346:     		return PKCS11_CKR_FUNCTION_FAILED;
347:     
348:     	ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);
349:     	if (!ptr)
350:     		return PKCS11_CKR_DEVICE_MEMORY;
351:     
352: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);
355:     	} else {
356:     		*data = ptr;
357:     		*size = sz;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GetObjectBufferAttribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GetObjectBufferAttribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "ptr",
      "sz",
      "res"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351"
      },
      {
        "lhs": "res, ptr, sz -> *data=*ptr; *size=sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "Checks for TEE_ERROR_SHORT_BUFFER on size query before allocation"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351",
        "evidence": "Checks ptr != NULL and returns error if allocation fails"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-355",
        "evidence": "Frees ptr on non-zero res; assigns out only on success"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "tee_obj handle (TEE object) passed into TEE_GetObjectBufferAttribute; handle is TEE-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "size out-parameter (&sz) bound by TEE_GetObjectBufferAttribute on first probe call",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "destination buffer ptr provided by caller is filled with object attribute bytes; buffer was allocated locally via TEE_Malloc",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "TEE_GetObjectBufferAttribute copies attribute data (sz bytes) from TEE object into ptr; provenance is TEE object attribute (TEE-private)",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GetObjectBufferAttribute
- target_sink_lines: [344, 352]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [344, 352] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GetObjectBufferAttribute",
    "lines": [
      344,
      352
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 344,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "Probes size into local variable (&sz) with expected TEE_ERROR_SHORT_BUFFER check; data flows TEE-object -> local size, not to REE.",
      "rule_id": "other"
    },
    {
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "Copies attribute bytes into TA-allocated buffer (ptr) inside TEE/TA memory; destination is TEE-private, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TEE object attribute (TEE-private)",
      "propagation_path": [
        "TEE_GetObjectBufferAttribute -> alloc_get_tee_attribute_data: ptr assigned and sz set (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358)",
        "alloc_get_tee_attribute_data returns a_ptr/a_size to tee2pkcs_add_attribute (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:372)",
        "add_attribute copies into obj_attrs in TA memory (/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:376)",
        "Downstream: created handles returned to REE later via TEE_MemMove at /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555 and /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:366"
      ],
      "sink": "TEE_GetObjectBufferAttribute called at lines 344 and 352 (TA-internal buffer/size)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls PKCS#11 templates/attributes sent from REE",
        "No additional access control restricting attribute extraction"
      ],
      "attack_scenario": "Malicious REE-supplied templates might influence attributes read from TEE objects, but TEE_GetObjectBufferAttribute here only copies into TA-private memory; exfiltration would require a later REE-visible copy.",
      "impact": "Low at these lines; potential impact depends on downstream copies to REE (separate locations)."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "tee2pkcs_rsa_attributes:619-682",
        "recommendation": "Ensure explicit access control checks before exporting sensitive private key components to attribute lists"
      },
      {
        "type": "type_validation",
        "location": "alloc_get_tee_attribute_data:344-352",
        "recommendation": "Validate expected attribute sizes/types beyond relying on TEE_GetObjectBufferAttribute probe"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit TEE_ERROR_SHORT_BUFFER check before allocation",
        "Allocation null-check and free-on-error present",
        "Destination buffers are TA-allocated (TEE_Malloc) and assigned only on success"
      ],
      "negative_indicators": [
        "Downstream code later copies handles/values into REE-visible memrefs (e.g., TEE_MemMove at processing.c:555 and entry.c:366)",
        "Provenance of some obj_attrs originates from REE-provided templates"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Calls at lines 344 and 352 operate on TEE object attributes into TA-private memory with proper probe/allocation/error checks; they do not directly export data to REE, so they are not vulnerable per policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The sink calls operate entirely within TEE/TA memory (size probe and copy into TA-allocated buffer) with proper error/size checks; no direct REE-visible output occurs at these lines.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "alloc_get_tee_attribute_data:344-346",
      "evidence": "Checks for TEE_ERROR_SHORT_BUFFER from first probe before allocation"
    },
    {
      "type": "allocation_check",
      "location": "alloc_get_tee_attribute_data:348-351",
      "evidence": "Checks ptr != NULL and returns on allocation failure"
    },
    {
      "type": "error_check",
      "location": "alloc_get_tee_attribute_data:352-358",
      "evidence": "Frees ptr on non-zero res and assigns out only on success"
    }
  ],
  "argument_safety": [
    {
      "arg": "tee_obj",
      "why_safe": "Used as TEE handle within TEE API; not directly a REE pointer",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344,352"
    },
    {
      "arg": "ptr (allocated)",
      "why_safe": "Allocated in TA memory and freed on error; assigned to out only on success",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-358"
    }
  ],
  "residual_risks": [
    "Downstream copies: attribute/handle data later copied into REE-visible buffers (processing.c:555, entry.c:366) which may enable disclosure if attributes include sensitive private key bytes",
    "Some obj_attrs are derived from REE-provided templates; malformed templates could influence sizes/attributes even though checks exist"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit probe/allocation/error handling at the sink site",
      "No direct REE-visible destination at these calls"
    ],
    "negative_indicators": [
      "Upstream inputs (templates) may be REE-originated; downstream flows to REE exist elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Per policy, these TEE_GetObjectBufferAttribute invocations copy into TA-private memory with checks; lack of REE-visible destination and presence of sanitizers make them not vulnerable. Structural risks about eventual REE exposure are tracked separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #167: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> tee2pkcs_ec_attributes -> tee2pkcs_add_attribute -> alloc_get_tee_attribute_data -> TEE_GetObjectBufferAttribute
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keystee2pkcs_ec_attributestee2pkcs_add_attributealloc_get_tee_attribute_dataTEE_GetObjectBufferAttribute

実行時間: 104.99秒

ターゲットシンク情報

シンク関数: TEE_GetObjectBufferAttribute

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344, 352

パラメータインデックス: 0

解析結果

安全判定理由: The two calls operate entirely on TEE object attributes and TA-private buffers; they do not directly copy secret material to REE and there are checks for the size query and allocation error handling.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: alloc_get_tee_attribute_data
プロンプト 中間 (alloc_get_tee_attribute_data)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_get_tee_attribute_data” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_add_attribute at lines [372]:
-- Call #1 at line 372 --
370: size_t a_size = 0;
371:
372: >>> rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);
373: if (rc)
374: goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

336: enum pkcs11_rc alloc_get_tee_attribute_data(TEE_ObjectHandle tee_obj,
337: uint32_t attribute,
338: void **data, size_t *size)
339: { 340: TEE_Result res = TEE_ERROR_GENERIC; 341: void *ptr = NULL; 342: size_t sz = 0; 343: 344: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz); 345: if (res != TEE_ERROR_SHORT_BUFFER) 346: return PKCS11_CKR_FUNCTION_FAILED; 347: 348: ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO); 349: if (!ptr) 350: return PKCS11_CKR_DEVICE_MEMORY; 351: 352: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz); 353: if (res) { 354: TEE_Free(ptr); 355: } else { 356: *data = ptr; 357: *size = sz; 358: } 359: 360: return tee2pkcs_error(res); 361: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_get_tee_attribute_data", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_get_tee_attribute_data", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_get_tee_attribute_data)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_get_tee_attribute_data",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "data",
      "size",
      "ptr",
      "sz",
      "res"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350"
      },
      {
        "lhs": "*data,*size",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz) -> ptr, sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "expects TEE_GetObjectBufferAttribute to return TEE_ERROR_SHORT_BUFFER to obtain size"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350",
        "evidence": "checks TEE_Malloc(ptr) return and returns DEVICE_MEMORY on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "callee tee_obj parameter is an internal TEE object handle (TEE-private) passed-in from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "attribute (tee_id) is passed as selector for TEE attribute; origin is code constant but semantics determine sensitivity",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=4,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "caller supplies &a_ptr to receive allocated buffer; returned data originates from TEE object attributes and may contain secret key material",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=allocated_sz"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 372,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "caller passes &a_size to receive size; size controls subsequent copies and allocations",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, tee_id, &a_ptr, &a_size);"
    }
  ]
}

関数: TEE_GetObjectBufferAttribute
プロンプト 中間 (TEE_GetObjectBufferAttribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GetObjectBufferAttribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_get_tee_attribute_data at lines [344, 352]:
-- Call #1 at line 344 --
342: size_t sz = 0;
343:
344: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345: if (res != TEE_ERROR_SHORT_BUFFER)
346: return PKCS11_CKR_FUNCTION_FAILED;
-- Call #2 at line 352 --
350: return PKCS11_CKR_DEVICE_MEMORY;
351:
352: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at lines [344, 352]:
339:     {
340:     	TEE_Result res = TEE_ERROR_GENERIC;
341:     	void *ptr = NULL;
342:     	size_t sz = 0;
343:     
344: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345:     	if (res != TEE_ERROR_SHORT_BUFFER)
346:     		return PKCS11_CKR_FUNCTION_FAILED;
347:     
348:     	ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);
349:     	if (!ptr)
350:     		return PKCS11_CKR_DEVICE_MEMORY;
351:     
352: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);
355:     	} else {
356:     		*data = ptr;
357:     		*size = sz;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GetObjectBufferAttribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GetObjectBufferAttribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "buffer",
      "sz",
      "res",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz) // size query",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350"
      },
      {
        "lhs": "ptr,sz -> *data,*size",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz) fills ptr and updates sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "expects TEE_GetObjectBufferAttribute to return TEE_ERROR_SHORT_BUFFER when querying size"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350",
        "evidence": "checks TEE_Malloc(ptr) return and returns error on NULL"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-355",
        "evidence": "frees ptr on error from second TEE_GetObjectBufferAttribute call"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "tee_obj handle originates from caller (TEE-private) and selects which attribute is queried; taint of handle affects returned size/data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "attribute selector (attribute) influences returned data and its sensitivity (can select private key material)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=4,dst_sz=4"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "allocated ptr receives attribute data from TEE (may contain secret key bytes); caller later copies this into TA structures",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=allocated_sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 348,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "queried size (sz) is used to allocate memory without explicit upper bound check; large sizes could lead to excessive allocation",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GetObjectBufferAttribute
- target_sink_lines: [344, 352]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [344, 352] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GetObjectBufferAttribute",
    "lines": [
      344,
      352
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 344,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "This call queries required size (res == TEE_ERROR_SHORT_BUFFER expected) for a TEE object attribute; it does not emit data to REE and upstream checks expect SHORT_BUFFER.",
      "rule_id": "other"
    },
    {
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "This call fills a TA-allocated buffer ptr with attribute data from a TEE object (TEE-private → TEE-private); no direct REE output on this line and allocation result is checked.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The two calls operate entirely on TEE object attributes and TA-private buffers; they do not directly copy secret material to REE and there are checks for the size query and allocation error handling.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "alloc_get_tee_attribute_data:344-346",
      "evidence": "expects TEE_GetObjectBufferAttribute to return TEE_ERROR_SHORT_BUFFER when querying size"
    },
    {
      "type": "allocation_check",
      "location": "alloc_get_tee_attribute_data:348-350",
      "evidence": "checks TEE_Malloc(ptr) return and returns DEVICE_MEMORY on failure"
    },
    {
      "type": "error_check",
      "location": "alloc_get_tee_attribute_data:352-355",
      "evidence": "frees ptr on error from second TEE_GetObjectBufferAttribute call"
    }
  ],
  "argument_safety": [
    {
      "arg": "tee_obj",
      "why_safe": "TEE object handle is TEE-private and used to fetch attributes within TEE",
      "evidence": "processing_ec.c:629-634 -> tee_obj allocated and used locally"
    },
    {
      "arg": "attribute",
      "why_safe": "attribute is a code-controlled selector (constants) but determines sensitivity of returned data; selection validated by upstream logic",
      "evidence": "calls originate from tee2pkcs_ec_attributes and callers choose tee_id"
    }
  ],
  "residual_risks": [
    "Returned attribute data may contain secret key material in TEE-private buffers; later code copies attributes into structures that are eventually copied to REE (e.g., TEE_MemMove to params/out in other functions)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit size-query/SHORT_BUFFER pattern present",
      "allocation and error handling checks around ptr",
      "calls operate on TEE object handles and TA-private buffers"
    ],
    "negative_indicators": [
      "queried size (sz) is used to allocate memory without an explicit upper bound check (possible large allocation)",
      "attribute selector can request private key bytes"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No direct data flow from these calls to REE occurs at the evaluated lines; sanitizers handle size-query and allocation errors. Main concerns are structural: possible large allocation and that returned secret data may later be exposed elsewhere in the call chain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 348,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "why": "Queried size sz is used to allocate memory without an explicit upper bound check; large or malformed sizes could lead to excessive allocation (resource exhaustion).",
      "code_excerpt": "ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=allocated_sz"
        ]
      },
      "why": "Allocated buffer ptr receives attribute data which may contain secret key bytes; downstream code copies these attributes into TA-managed structures and may eventually export them to REE.",
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    }
  ]
}
フロー #168: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> tee2pkcs_ec_attributes -> alloc_get_tee_attribute_data -> TEE_GetObjectBufferAttribute
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keystee2pkcs_ec_attributesalloc_get_tee_attribute_dataTEE_GetObjectBufferAttribute

実行時間: 116.40秒

ターゲットシンク情報

シンク関数: TEE_GetObjectBufferAttribute

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344, 352

パラメータインデックス: 0

解析結果

詳細: These two calls operate on TEE-private object and TA-private buffers with explicit probe/allocation/error handling; they do not directly copy TA secrets into REE-visible memory, so they are not vulnerable sink occurrences per policy.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: alloc_get_tee_attribute_data
プロンプト 中間 (alloc_get_tee_attribute_data)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “alloc_get_tee_attribute_data” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_ec_attributes at lines [502, 507]:
-- Call #1 at line 502 --
500: goto out;
501:
502: >>> rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_X,
503: &x_ptr, &x_size);
504: if (rc)
-- Call #2 at line 507 --
505: goto out;
506:
507: >>> rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_Y,
508: &y_ptr, &y_size);
509: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

336: enum pkcs11_rc alloc_get_tee_attribute_data(TEE_ObjectHandle tee_obj,
337: uint32_t attribute,
338: void **data, size_t *size)
339: { 340: TEE_Result res = TEE_ERROR_GENERIC; 341: void *ptr = NULL; 342: size_t sz = 0; 343: 344: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz); 345: if (res != TEE_ERROR_SHORT_BUFFER) 346: return PKCS11_CKR_FUNCTION_FAILED; 347: 348: ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO); 349: if (!ptr) 350: return PKCS11_CKR_DEVICE_MEMORY; 351: 352: res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz); 353: if (res) { 354: TEE_Free(ptr); 355: } else { 356: *data = ptr; 357: *size = sz; 358: } 359: 360: return tee2pkcs_error(res); 361: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "alloc_get_tee_attribute_data", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"alloc_get_tee_attribute_data", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (alloc_get_tee_attribute_data)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "alloc_get_tee_attribute_data",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "data",
      "size",
      "ptr",
      "sz",
      "res"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351"
      },
      {
        "lhs": "ptr (filled)",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      },
      {
        "lhs": "*data,*size",
        "rhs": "ptr,sz when second TEE_GetObjectBufferAttribute succeeds",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:355-358"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "checks for TEE_ERROR_SHORT_BUFFER return from initial TEE_GetObjectBufferAttribute call"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350",
        "evidence": "validates TEE_Malloc(ptr) non-NULL and returns error otherwise"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 502,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "tee_obj handle (TEE-private) passed by caller into alloc_get_tee_attribute_data; binding of callee parameter to TEE-managed object handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_X, &x_ptr, &x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 502,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "address of local pointer x_ptr passed to callee so callee will write a TEE_Malloc'ed buffer back into caller memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_X, &x_ptr, &x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 507,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "address of local size y_size passed to callee so callee will write attribute size back into caller memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = alloc_get_tee_attribute_data(tee_obj, TEE_ATTR_ECC_PUBLIC_VALUE_Y, &y_ptr, &y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "rule": "other",
      "why": "Copies TEE object attribute into allocated buffer via TEE_GetObjectBufferAttribute; buffer is TEE_Malloc'ed and later returned to caller",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    }
  ]
}

関数: TEE_GetObjectBufferAttribute
プロンプト 中間 (TEE_GetObjectBufferAttribute)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GetObjectBufferAttribute” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_get_tee_attribute_data at lines [344, 352]:
-- Call #1 at line 344 --
342: size_t sz = 0;
343:
344: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345: if (res != TEE_ERROR_SHORT_BUFFER)
346: return PKCS11_CKR_FUNCTION_FAILED;
-- Call #2 at line 352 --
350: return PKCS11_CKR_DEVICE_MEMORY;
351:
352: >>> res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at lines [344, 352]:
339:     {
340:     	TEE_Result res = TEE_ERROR_GENERIC;
341:     	void *ptr = NULL;
342:     	size_t sz = 0;
343:     
344: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);
345:     	if (res != TEE_ERROR_SHORT_BUFFER)
346:     		return PKCS11_CKR_FUNCTION_FAILED;
347:     
348:     	ptr = TEE_Malloc(sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);
349:     	if (!ptr)
350:     		return PKCS11_CKR_DEVICE_MEMORY;
351:     
352: >>> 	res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);
353:     	if (res) {
354:     		TEE_Free(ptr);
355:     	} else {
356:     		*data = ptr;
357:     		*size = sz;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GetObjectBufferAttribute",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GetObjectBufferAttribute)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetObjectBufferAttribute",
    "tainted_vars": [
      "tee_obj",
      "attribute",
      "buffer",
      "size",
      "res",
      "ptr",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz) -> fills sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sz, ...) allocated before second call",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-351"
      },
      {
        "lhs": "ptr (filled), sz",
        "rhs": "TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz) writes attribute into ptr and may update sz",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:352-358"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:344-346",
        "evidence": "expects TEE_ERROR_SHORT_BUFFER from probe call and errors otherwise"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:348-350",
        "evidence": "checks TEE_Malloc(ptr) non-NULL and returns error if allocation fails"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "tee_obj handle (TEE-private) passed into TEE_GetObjectBufferAttribute probe call; callee reads object metadata",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 344,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "address of local sz passed so callee writes required size back to caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, NULL, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "buffer ptr (TEE_Malloc'ed) passed as destination for attribute data; callee writes attribute bytes into this TA-allocated buffer",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sz,src_sz=sz,dst_sz=sz"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 352,
      "function": "TEE_GetObjectBufferAttribute",
      "rule": "other",
      "why": "address of sz passed so callee may update actual size written into ptr",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(size_t),src_sz=unknown,dst_sz=sizeof(size_t)"
        ]
      },
      "code_excerpt": "res = TEE_GetObjectBufferAttribute(tee_obj, attribute, ptr, &sz);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GetObjectBufferAttribute
- target_sink_lines: [344, 352]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [344, 352] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GetObjectBufferAttribute",
    "lines": [
      344,
      352
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 344,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "Probe call retrieves required size into TA-local sz for subsequent allocation; caller treats tee_obj as TEE-private and checks for TEE_ERROR_SHORT_BUFFER.",
      "rule_id": "other"
    },
    {
      "line": 352,
      "function": "alloc_get_tee_attribute_data",
      "sink_function": "TEE_GetObjectBufferAttribute",
      "status": "safe",
      "why": "Second call writes attribute bytes into a TEE_Malloc'ed TA-private buffer (ptr) with prior allocation of sz; errors handled and caller returns on failure.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TEE object attributes (tee_obj) - TEE-private",
      "propagation_path": [
        "TEE_GetObjectBufferAttribute(NULL probe) -> sz filled @ processing.c:344",
        "TEE_Malloc(sz) -> ptr allocated @ processing.c:348",
        "TEE_GetObjectBufferAttribute(ptr, &sz) -> ptr filled and returned to caller @ processing.c:352-358",
        "ptr returned to tee2pkcs_ec_attributes -> x_ptr/y_ptr used to build ecpoint @ processing_ec.c:502-564",
        "ecpoint added to attributes and may be stored/exposed later @ processing_ec.c:572-578 and processing.c:555-556"
      ],
      "sink": "TEE_GetObjectBufferAttribute writes into TA-private memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls no TEE object handle (tee_obj) directly; tee_obj originates inside TA",
        "no direct REE-visible buffer is written by these sink calls"
      ],
      "attack_scenario": "Not applicable for these lines since calls operate on TEE-private memory; higher-level flows may expose attributes later.",
      "impact": "None at these lines; potential exposure may occur at different call sites that copy TA data into REE-visible buffers."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "processing_ec.c:614-622",
        "recommendation": "Ensure ec params length and contents are strictly validated before use (already partially checked)"
      },
      {
        "type": "range_check",
        "location": "processing_ec.c:512-516",
        "recommendation": "Confirm psize-based checks cover all integer/edge cases and protect against large tee_size leading to allocation issues"
      },
      {
        "type": "access_control",
        "location": "processing.c:553-556",
        "recommendation": "Ensure handles written into out->memref.buffer (REE-visible) are validated/authorized before writing"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Probe call checks for TEE_ERROR_SHORT_BUFFER before allocating (processing.c:344-346)",
        "Allocation is checked for NULL and error-handled (processing.c:348-351)",
        "Caller frees on failure and only returns allocated buffer on success (processing.c:352-358)"
      ],
      "negative_indicators": [
        "Later code copies constructed ecpoint into attribute lists which may later be copied to REE-visible memory (structural risk elsewhere)",
        "Some size computations (dersize, hsize) are derived from tee_size; edge conditions rely on earlier checks"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "These two calls operate on TEE-private object and TA-private buffers with explicit probe/allocation/error handling; they do not directly copy TA secrets into REE-visible memory, so they are not vulnerable sink occurrences per policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Calls read TEE object attributes into TA-private memory with size probe and allocation checks, preventing direct tainted→REE sink at these lines.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "processing.c:344-346",
      "evidence": "expects TEE_ERROR_SHORT_BUFFER from probe call"
    },
    {
      "type": "allocation_check",
      "location": "processing.c:348-351",
      "evidence": "validates TEE_Malloc(ptr) non-NULL and returns error otherwise"
    },
    {
      "type": "bounds_check",
      "location": "processing_ec.c:512-516",
      "evidence": "verifies x_size and y_size not greater than computed psize"
    }
  ],
  "argument_safety": [
    {
      "arg": "tee_obj",
      "why_safe": "TEE-private object handle used only within TA APIs",
      "evidence": "processing.c:344-352"
    },
    {
      "arg": "ptr,sz",
      "why_safe": "sz probed and ptr allocated before being written; failures handled",
      "evidence": "processing.c:344-352"
    }
  ],
  "residual_risks": [
    "Higher-level copies (e.g., TEE_MemMove to params[0].memref.buffer at entry.c:366 and handle writes at processing.c:555-556) may expose sensitive data to REE; memory-safety and authorization checks at those sites determine overall disclosure risk."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit probe/allocation/error handling at sink site",
      "Data remains in TA-private buffers after these calls"
    ],
    "negative_indicators": [
      "Subsequent steps copy derived data into attribute lists and eventually into REE-visible buffers elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Per policy, memory-safety checks and region analysis show these TEE_GetObjectBufferAttribute calls are TA-internal and protected; therefore not vulnerable sink instances. Structural risks that may lead to disclosure are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies enum rc into caller-provided params[0].memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes generated key handles into caller-provided out->memref.buffer (REE-visible).",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes generated private key handle into caller-provided out->memref.buffer (REE-visible).",
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 559,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=x_size,src_sz=x_size,dst_sz=dersize"
        ]
      },
      "why": "Copies public X coordinate from TEE attribute into constructed ecpoint buffer.",
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 564,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=y_size,src_sz=y_size,dst_sz=dersize"
        ]
      },
      "why": "Copies public Y coordinate from TEE attribute into constructed ecpoint buffer.",
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 572,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "why": "Adds derived EC_POINT (includes sensitive/private-derived data) into priv_head via add_attribute; priv_head may be persisted or later exported.",
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, ecpoint, dersize);"
    }
  ]
}
フロー #169: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairTEE_MemMove

実行時間: 39.75秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555, 556

パラメータインデックス: 0

解析結果

安全判定理由: Copies write fixed-size TA-local handles into a caller buffer whose size was validated against the expected out_ref_size; handles are not classified as secret so no unencrypted_output applies.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [555, 556, 1046]:
-- Call #1 at line 555 --
553: hdl_ptr = (uint32_t *)out->memref.buffer;
554:
555: >>> TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
-- Call #2 at line 556 --
554:
555: TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: >>> TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
558: DMSG("PKCS11 session %"PRIu32": create key pair %#"PRIx32"/%#"PRIx32,
-- Call #3 at line 1046 --
1044: head = NULL;
1045:
1046: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1047: out->memref.size = sizeof(obj_handle);
1048:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c

// Call at lines [555, 556]:
550:
551: priv_head = NULL;
552:
553: hdl_ptr = (uint32_t *)out->memref.buffer;
554:
555: >>> TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));
556: >>> TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));
557:
558: DMSG("PKCS11 session %"PRIu32": create key pair %#"PRIx32"/%#"PRIx32,
559: session->handle, privkey_handle, pubkey_handle);
560:
561: pubkey_handle = 0;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "hdl_ptr / out->memref.buffer (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:553-556,1044-1046"
      },
      {
        "lhs": "src",
        "rhs": "&pubkey_handle / &privkey_handle / &obj_handle (local TA-private handles)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555-556,1046"
      },
      {
        "lhs": "n",
        "rhs": "sizeof(pubkey_handle) / sizeof(privkey_handle) / sizeof(obj_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:555-556,1046"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of caller-provided out->memref.buffer passed as dest (shared/REE-visible) into TEE_MemMove at key-pair creation site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of TA-local pubkey_handle passed as src into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "&pubkey_handle"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of caller-provided out->memref.buffer+1 passed as dest (shared/REE-visible) into TEE_MemMove for priv key handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of TA-local privkey_handle passed as src into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "&privkey_handle"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1046,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of caller-provided out->memref.buffer passed as dest into TEE_MemMove at object creation site",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1046,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "alias of TA-local obj_handle passed as src into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "&obj_handle"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [555, 556]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [555, 556] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      555,
      556
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is caller-provided REE memref but out->memref.size was validated equal to expected out_ref_size earlier (ptypes check) and copy length equals sizeof(pubkey_handle); no tainted size leads to overflow and data is non-sensitive handle.",
      "rule_id": "other"
    },
    {
      "line": 556,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "As above: out->memref.size was checked against expected combined size and copy length sizeof(privkey_handle) fits; source is TA-local handle (non-sensitive) and no tainted bounds observed.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Copies write fixed-size TA-local handles into a caller buffer whose size was validated against the expected out_ref_size; handles are not classified as secret so no unencrypted_output applies.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_key_pair:412-413",
      "evidence": "ptypes compared to exp_pt and out->memref.size compared to out_ref_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated against expected combined handle sizes",
      "evidence": "processing.c:410-413"
    },
    {
      "arg": "src (&pubkey_handle, &privkey_handle)",
      "why_safe": "TA-local generated handles (not secret) used as source",
      "evidence": "processing.c:534-556"
    }
  ],
  "residual_risks": [
    "none"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit check: out->memref.size == out_ref_size (processing.c:412-413)",
      "copy sizes are sizeof fixed-width handles"
    ],
    "negative_indicators": [
      "dst buffer originates from REE (caller-provided) — structural risk remains if earlier validation is bypassed elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety check for output buffer size is present and copy lengths are fixed and match validated sizes; data copied are non-sensitive handles, so neither overflow nor unencrypted sensitive output applies.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_Param*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "params (caller-provided memrefs) alias into local pointers (ctrl/out/hld_ptr); shared buffer provenance is REE-visible which is a structural risk to track.",
      "code_excerpt": "hdl_ptr = (uint32_t *)out->memref.buffer;"
    }
  ]
}
フロー #170: TA_InvokeCommandEntryPoint -> entry_ping -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_pingTEE_MemMove

実行時間: 64.87秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:72

パラメータインデックス: 0

解析結果

安全判定理由: Bounds and type checks (ptypes and out->memref.size == sizeof(ver)) ensure the fixed-size copy fits; copied data is public TA version info.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: entry_ping
プロンプト 中間 (entry_ping)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “entry_ping” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from TA_InvokeCommandEntryPoint at lines [157]:
-- Call #1 at line 157 --
155:     	switch (cmd) {
156:     	case PKCS11_CMD_PING:
157: >>> 		rc = entry_ping(ptypes, params);
158:     		break;
159:     

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c

54: static enum pkcs11_rc entry_ping(uint32_t ptypes, TEE_Param *params)
55: {
56: const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
57: TEE_PARAM_TYPE_NONE,
58: TEE_PARAM_TYPE_MEMREF_OUTPUT,
59: TEE_PARAM_TYPE_NONE);
60: TEE_Param *out = params + 2;
61: const uint32_t ver[] = {
62: PKCS11_TA_VERSION_MAJOR,
63: PKCS11_TA_VERSION_MINOR,
64: PKCS11_TA_VERSION_PATCH,
65: };
66:
67: if (ptypes != exp_pt ||
68: params[0].memref.size != TEE_PARAM0_SIZE_MIN ||
69: out->memref.size != sizeof(ver))
70: return PKCS11_CKR_ARGUMENTS_BAD;
71:
72: TEE_MemMove(out->memref.buffer, ver, sizeof(ver));
73:
74: return PKCS11_CKR_OK;
75: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ping",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"entry_ping",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (entry_ping)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "entry_ping",
    "tainted_vars": [
      "ptypes",
      "params",
      "params[0].memref.size",
      "out",
      "out->memref.size",
      "out->memref.buffer"
    ],
    "propagation": [
      {
        "lhs": "out",
        "rhs": "params + 2",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:60"
      },
      {
        "lhs": "ptypes",
        "rhs": "caller ptypes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:54-55"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "params[2].memref.buffer (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:60,72"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:56-59,67",
        "evidence": "ptypes must equal expected TEE_PARAM_TYPES or function returns error"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:68-70",
        "evidence": "params[0].memref.size and out->memref.size compared to expected sizes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 157,
      "function": "entry_ping",
      "rule": "other",
      "why": "Call-site binds callee params pointer to caller-provided params (shared/REE-visible) — alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=?,src_sz=?,dst_sz=?"
        ]
      },
      "code_excerpt": "rc = entry_ping(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 72,
      "function": "entry_ping",
      "rule": "other",
      "why": "Copies TA-local version array into caller-provided out->memref.buffer (REE-visible); bounds checked against out->memref.size",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(ver),src_sz=sizeof(ver),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, ver, sizeof(ver));"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ping at lines [72, 366]:
-- Call #1 at line 72 --
70: return PKCS11_CKR_ARGUMENTS_BAD;
71:
72: >>> TEE_MemMove(out->memref.buffer, ver, sizeof(ver));
73:
74: return PKCS11_CKR_OK;
-- Call #2 at line 366 --
364: DMSG("%s rc %#"PRIx32"/%s", id2str_ta_cmd(cmd), rc, id2str_rc(rc));
365:
366: >>> TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));
367: params[0].memref.size = sizeof(rc);
368:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c

// Call at line 72:
67: if (ptypes != exp_pt ||
68: params[0].memref.size != TEE_PARAM0_SIZE_MIN ||
69: out->memref.size != sizeof(ver))
70: return PKCS11_CKR_ARGUMENTS_BAD;
71:
72: >>> TEE_MemMove(out->memref.buffer, ver, sizeof(ver));
73:
74: return PKCS11_CKR_OK;
75: }
76:
77: static bool __maybe_unused param_is_none(uint32_t ptypes, unsigned int index)

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "out->memref.buffer",
      "ver",
      "params[0].memref.buffer",
      "&rc"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:72,366"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:72,366"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length argument passed into TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:72,366"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 72,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee dest parameter aliases caller-provided out->memref.buffer (shared/REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=?,src_sz=?,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, ver, sizeof(ver));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 72,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee src parameter aliases local ver array (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(ver),src_sz=sizeof(ver),dst_sz=?"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, ver, sizeof(ver));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee dest parameter aliases caller-provided params[0].memref.buffer (shared/REE-visible)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=?,src_sz=?,dst_sz=params[0].memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: callee src parameter aliases address of local rc (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=?"
        ]
      },
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [72]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [72] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      72
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 72,
      "function": "entry_ping",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is caller-provided REE memref but function enforces ptypes and checks out->memref.size == sizeof(ver) before TEE_MemMove; source is TA-local public version array.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Bounds and type checks (ptypes and out->memref.size == sizeof(ver)) ensure the fixed-size copy fits; copied data is public TA version info.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ping:56-59,67",
      "evidence": "ptypes compared to expected TEE_PARAM_TYPES and function returns on mismatch"
    },
    {
      "type": "bounds_check",
      "location": "entry_ping:68-70",
      "evidence": "params[0].memref.size and out->memref.size compared to expected sizes"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated equals sizeof(ver) prior to copy",
      "evidence": "entry_ping:68-72"
    },
    {
      "arg": "ver",
      "why_safe": "TA-local constant array, non-sensitive",
      "evidence": "entry_ping:61-65,72"
    }
  ],
  "residual_risks": [
    "Line 366 copies local rc into caller-provided params[0].memref.buffer (REE-visible); although rc is public, this is a TA->REE copy and should be considered for policy review"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ptypes check",
      "explicit out->memref.size equality check to sizeof(ver)",
      "small fixed-size copy from TA-local array"
    ],
    "negative_indicators": [
      "destination originated in REE (shared) which is always a structural risk",
      "no provenance label proving ver is non-sensitive beyond naming/context"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The copy at line 72 is type- and size-checked against a fixed TA-local array and transfers public version data to REE; thus it is not a vulnerability under memory-safety or information-disclosure rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 157,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=?,src_sz=?,dst_sz=?"
        ]
      },
      "why": "Alias: caller params pointer passed into entry_ping (shared buffer origin); structural binding of REE buffer into callee.",
      "code_excerpt": "rc = entry_ping(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer; bounds not provably checked against sizeof(rc) at this call site in the same function path (params[0].memref.size was checked earlier but different call paths may reach here).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #171: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> set_token_description -> pad_str -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_ck_slot_infoset_token_descriptionpad_strTEE_MemFill

実行時間: 96.94秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283

パラメータインデックス: 0

解析結果

安全判定理由: TEE_MemFill at line 283 writes TA-private buffer region with a length bounded by strnlen(size); no tainted REE secret is written to a REE-visible buffer at this call site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (8 メッセージ)

関数: set_token_description
プロンプト 中間 (set_token_description)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_token_description” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_slot_info at lines [348]:
-- Call #1 at line 348 --
346: return PKCS11_CKR_SLOT_ID_INVALID;
347:
348: >>> set_token_description(&info);
349:
350: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

286: static void set_token_description(struct pkcs11_slot_info *info)
287: { 288: char desc[sizeof(info->slot_description) + 1] = { 0 }; 289: TEE_UUID dev_id = { }; 290: TEE_Result res = TEE_ERROR_GENERIC; 291: int n = 0; 292: 293: res = TEE_GetPropertyAsUUID(TEE_PROPSET_TEE_IMPLEMENTATION, 294: "gpd.tee.deviceID", &dev_id); 295: if (res == TEE_SUCCESS) { 296: n = snprintk(desc, sizeof(desc), PKCS11_SLOT_DESCRIPTION 297: " - TEE UUID %pUl", (void *)&dev_id); 298: } else { 299: n = snprintf(desc, sizeof(desc), PKCS11_SLOT_DESCRIPTION 300: " - No TEE UUID"); 301: } 302: if (n < 0 || n >= (int)sizeof(desc)) 303: TEE_Panic(0); 304: 305: TEE_MemMove(info->slot_description, desc, n); 306: pad_str(info->slot_description, sizeof(info->slot_description)); 307: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_token_description", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_token_description", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_token_description)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_token_description",
    "tainted_vars": [
      "info",
      "desc",
      "dev_id",
      "res",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dev_id",
        "rhs": "TEE_GetPropertyAsUUID(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:293-295"
      },
      {
        "lhs": "desc",
        "rhs": "snprintk(...) or snprintf(...) writing PKCS11_SLOT_DESCRIPTION and dev_id into desc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:296-301"
      },
      {
        "lhs": "info->slot_description",
        "rhs": "desc via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305-306"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:302-303",
        "evidence": "if (n < 0 || n >= (int)sizeof(desc)) TEE_Panic(0) prevents overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 348,
      "function": "set_token_description",
      "rule": "other",
      "why": "Caller passes address of local 'info' into callee (alias of caller-local struct bound to callee parameter).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(*info)"
        ]
      },
      "code_excerpt": "set_token_description(&info);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 305,
      "function": "set_token_description",
      "rule": "other",
      "why": "Copies formatted desc into info->slot_description via TEE_MemMove; dest and src are TA-private but ultimately flow to caller buffer later.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=sizeof(desc),dst_sz=sizeof(info->slot_description)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info->slot_description, desc, n);"
    }
  ]
}

関数: pad_str
プロンプト 中間 (pad_str)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “pad_str” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_token_description at lines [306, 350, 403, 404, 412]:
-- Call #1 at line 306 --
304:
305: TEE_MemMove(info->slot_description, desc, n);
306: >>> pad_str(info->slot_description, sizeof(info->slot_description));
307: }
308:
-- Call #2 at line 350 --
348: set_token_description(&info);
349:
350: >>> pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
351:
352: out->memref.size = sizeof(info);
-- Call #3 at line 403 --
401: return PKCS11_CKR_SLOT_ID_INVALID;
402:
403: >>> pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: pad_str(info.model, sizeof(info.model));
405:
-- Call #4 at line 404 --
402:
403: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: >>> pad_str(info.model, sizeof(info.model));
405:
406: n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
-- Call #5 at line 412 --
410:
411: TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: >>> pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: TEE_MemFill(str + n, ' ', size - n); 284: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "pad_str", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"pad_str", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (pad_str)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "pad_str",
    "tainted_vars": [
      "str",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "strnlen((char *)str, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281"
      },
      {
        "lhs": "str + n",
        "rhs": "pointer arithmetic based on n and str",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen(..., size) bounds search limited to size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 306,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info->slot_description (TA-local buffer) passed into pad_str.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(info->slot_description),dst_sz=sizeof(info->slot_description)"
        ]
      },
      "code_excerpt": "pad_str(info->slot_description, sizeof(info->slot_description));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 350,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.manufacturer_id (TA-local buffer) passed into pad_str.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(info.manufacturer_id),dst_sz=sizeof(info.manufacturer_id)"
        ]
      },
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 403,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.manufacturer_id (caller-local buffer) passed into pad_str on this path.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(info.manufacturer_id),dst_sz=sizeof(info.manufacturer_id)"
        ]
      },
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 404,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.model (TA-local buffer) passed into pad_str.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(info.model),dst_sz=sizeof(info.model)"
        ]
      },
      "code_excerpt": "pad_str(info.model, sizeof(info.model));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 412,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.serial_number (TA-local buffer filled just prior) passed into pad_str.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=sizeof(info.serial_number),dst_sz=sizeof(info.serial_number)"
        ]
      },
      "code_excerpt": "pad_str(info.serial_number, sizeof(info.serial_number));"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from pad_str at lines [283]:
-- Call #1 at line 283 --
281: int n = strnlen((char *)str, size);
282:
283: >>> TEE_MemFill(str + n, ' ', size - n);
284: }
285:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 283:
278:
279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: >>> TEE_MemFill(str + n, ' ', size - n); 284: }
285:
286: static void set_token_description(struct pkcs11_slot_info *info)
287:     {
288:     	char desc[sizeof(info->slot_description) + 1] = { 0 };

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemFill",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "str",
      "size",
      "n",
      "str + n",
      "size - n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "strnlen((char *)str, size) from caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281"
      },
      {
        "lhs": "dest_ptr (str + n)",
        "rhs": "str and n via pointer arithmetic",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      },
      {
        "lhs": "fill_len (size - n)",
        "rhs": "size and n subtraction",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen(..., size) limits n to [0,size]"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "Binding: callee will write into buffer derived from caller-provided pointer 'str' (alias of info field in caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size - n,src_sz=unknown,dst_sz=size - n"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "Per-byte fill into buffer at offset n; n derived from str content but bounded by size via strnlen.",
      "sink_function": "TEE_MemFill",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=1,dst_sz=size - n"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [283]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [283] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      283
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 283,
      "function": "pad_str",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "Destination pointer derived from TA-private buffer and write length = size - n is bounded by strnlen(..., size), preventing overflow; no REE-visible destination or sensitive data copied here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "TEE_MemFill at line 283 writes TA-private buffer region with a length bounded by strnlen(size); no tainted REE secret is written to a REE-visible buffer at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "pad_str:281",
      "evidence": "strnlen((char *)str, size) limits n to [0,size]"
    }
  ],
  "argument_safety": [
    {
      "arg": "str",
      "why_safe": "caller passes TA-local info fields (TA-private) on observed call paths",
      "evidence": "pkcs11_token.c:305-306, 350, 403-404, 412"
    },
    {
      "arg": "size",
      "why_safe": "size is the fixed sizeof of the destination field in caller",
      "evidence": "calls use sizeof(info.*) at pkcs11_token.c:306,350,403,404,412"
    }
  ],
  "residual_risks": [
    "Other lines perform copies to REE-visible buffers (e.g., TEE_MemMove at entry.c:366 and pkcs11_token.c:353) which are separate issues not suppressed by this decision."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "strnlen used to bound n",
      "writes target TA-private buffers in observed call paths",
      "no evidence of sensitive secret data flowing into this specific TEE_MemFill call"
    ],
    "negative_indicators": [
      "origin of some info fields ultimately flows from caller params in other paths (structural risks exist)",
      "possible unknown call sites not analyzed could pass REE-visible pointers"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and sensitivity checks at this call are sufficient: length is bounded and destination is TA-private on observed paths, so the TEE_MemFill at line 283 is not a vulnerability in this context.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 164,
      "function": "entry_ck_slot_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Alias of caller-provided params passed into entry_ck_slot_info (binding at call site).",
      "code_excerpt": "rc = entry_ck_slot_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 338,
      "function": "entry_ck_slot_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(token_id),src_sz=ctrl->memref.size,dst_sz=sizeof(token_id)"
        ]
      },
      "why": "token_id is read from caller-controlled ctrl->memref.buffer and used in control flow (get_token).",
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local struct info into caller-provided out->memref.buffer (REE-visible destination).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer (REE-visible).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #172: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> pad_str -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_ck_slot_infopad_strTEE_MemFill

実行時間: 65.86秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283

パラメータインデックス: 0

解析結果

詳細: The write length is calculated from strnlen bounded by size, so writes stay within the provided buffer; destination is TEE-private in this call chain, so no unencrypted REE output or overflow is evident at this line.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: pad_str
プロンプト 中間 (pad_str)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “pad_str” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_slot_info at lines [350, 403, 404, 412]:
-- Call #1 at line 350 --
348: set_token_description(&info);
349:
350: >>> pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
351:
352: out->memref.size = sizeof(info);
-- Call #2 at line 403 --
401: return PKCS11_CKR_SLOT_ID_INVALID;
402:
403: >>> pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: pad_str(info.model, sizeof(info.model));
405:
-- Call #3 at line 404 --
402:
403: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: >>> pad_str(info.model, sizeof(info.model));
405:
406: n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
-- Call #4 at line 412 --
410:
411: TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: >>> pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: TEE_MemFill(str + n, ' ', size - n); 284: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "pad_str", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"pad_str", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (pad_str)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "pad_str",
    "tainted_vars": [
      "str",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "strnlen((char *)str, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281"
      },
      {
        "lhs": "str + n",
        "rhs": "pointer arithmetic based on caller-provided str and n",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen is bounded by size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 350,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.manufacturer_id (caller-local struct) passed into pad_str; pad_str writes (size - n) bytes at str+n based on str content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 403,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.manufacturer_id (caller-local) passed into pad_str; function performs writes at str+n derived from str and size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 404,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.model (caller-local) passed into pad_str; function writes trailing spaces based on strnlen result.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "pad_str(info.model, sizeof(info.model));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 412,
      "function": "pad_str",
      "rule": "other",
      "why": "Alias of info.serial_number (populated from snprintf/sn and then passed) written by pad_str; writes based on strnlen and size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "pad_str(info.serial_number, sizeof(info.serial_number));"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from pad_str at lines [283]:
-- Call #1 at line 283 --
281: int n = strnlen((char *)str, size);
282:
283: >>> TEE_MemFill(str + n, ' ', size - n);
284: }
285:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 283:
278:
279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: >>> TEE_MemFill(str + n, ' ', size - n); 284: }
285:
286: static void set_token_description(struct pkcs11_slot_info *info)
287:     {
288:     	char desc[sizeof(info->slot_description) + 1] = { 0 };

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemFill",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "dest",
      "value",
      "len",
      "str",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "str + n (caller-provided pointer arithmetic)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      },
      {
        "lhs": "len",
        "rhs": "size - n (computed from caller-provided size and strnlen result)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281-283"
      },
      {
        "lhs": "n",
        "rhs": "strnlen((char *)str, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen is bounded by size, so n <= size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "Destination pointer is caller-derived (str + n); TEE_MemFill writes len bytes at that alias of caller buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=1,dst_sz=size - n"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [283]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [283] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      283
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 283,
      "function": "pad_str",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "Destination computed as str + n where n = strnlen(str, size) and len = size - n, so writes are bounded to the provided size; dest is TEE-private in this call context.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided struct field pointers (info.*)",
      "propagation_path": [
        "params -> entry_ck_slot_info -> info populated @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:348-352",
        "info.manufacturer_id -> pad_str arg str @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:350",
        "pad_str: n = strnlen(str,size) -> TEE_MemFill(str + n, ' ', size - n) @ ...:281-283"
      ],
      "sink": "TEE_MemFill writes trailing spaces within bounds of provided size"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed/attacker-controlled contents of struct field passed to pad_str"
      ],
      "attack_scenario": "An attacker controls bytes in the target buffer to influence n, but strnlen(size) bounds prevent out-of-bounds writes so no buffer overflow at this call site.",
      "impact": "If other invariants broken, could lead to incorrect padding; no direct memory corruption or data leakage here."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "pad_str:281-283",
        "recommendation": "Keep explicit checks ensuring size>0 and handle negative/zero lengths defensively (already implicitly bounded by strnlen)."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "strnlen used with size bound (evidence of bounds checking)",
        "len computed as size - n ensures write length within size"
      ],
      "negative_indicators": [
        "dest pointer derived from caller data (alias), but in current context points to TA-private struct fields, not REE-visible shared memory"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The write length is calculated from strnlen bounded by size, so writes stay within the provided buffer; destination is TEE-private in this call chain, so no unencrypted REE output or overflow is evident at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "strnlen(size) bounds and len = size - n ensure TEE_MemFill writes stay within buffer, and destination is TEE-private in this usage.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "pad_str:281",
      "evidence": "n = strnlen((char *)str, size) (limits n to <= size)"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_slot_info:333-334",
      "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info) checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "str (pad_str)",
      "why_safe": "Caller passes pointer to TA-private struct field; pad_str's length computation is bounded by provided size",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:350,281-283"
    },
    {
      "arg": "size (pad_str)",
      "why_safe": "Used as upper bound in strnlen and for write length computation",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281-283"
    }
  ],
  "residual_risks": [
    "Line 353: TEE_MemMove(out->memref.buffer, &info, out->memref.size) copies TA data into REE-visible buffer (possible information exposure) — not promoted here because evaluation target was line 283."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit strnlen(size) bound and computed len = size - n",
      "call context shows pad_str operates on TA-local info fields (TEE-private)"
    ],
    "negative_indicators": [
      "destination pointer is derived from caller data (alias) generally requiring care"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and information-flow checks at pad_str (strnlen bound) and call context (TEE-private buffers) indicate TEE_MemFill at line 283 is not a vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 164,
      "function": "entry_ck_slot_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: params passed from TA_InvokeCommandEntryPoint alias caller-provided shared params into callee.",
      "code_excerpt": "rc = entry_ck_slot_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 338,
      "function": "entry_ck_slot_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(token_id),src_sz=ctrl->memref.size,dst_sz=sizeof(token_id)"
        ]
      },
      "why": "token_id read from caller-controlled ctrl->memref.buffer influences control flow (get_token lookup).",
      "code_excerpt": "rc = serialargs_get(&ctrlargs, &token_id, sizeof(token_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local struct info into caller-provided out->memref.buffer (REE-visible destination).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    }
  ]
}
フロー #173: TA_InvokeCommandEntryPoint -> entry_ck_token_info -> pad_str -> TEE_MemFill
安全
TA_InvokeCommandEntryPointentry_ck_token_infopad_strTEE_MemFill

実行時間: 81.14秒

ターゲットシンク情報

シンク関数: TEE_MemFill

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283

パラメータインデックス: 0

解析結果

詳細: Writes are bounded by strnlen and size, and callers use sizeof() of local fields, so TEE_MemFill at line 283 is not exposed to a tainted unbounded write in observed call-sites.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: pad_str
プロンプト 中間 (pad_str)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “pad_str” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_info at lines [403, 404, 412]:
-- Call #1 at line 403 --
401: return PKCS11_CKR_SLOT_ID_INVALID;
402:
403: >>> pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: pad_str(info.model, sizeof(info.model));
405:
-- Call #2 at line 404 --
402:
403: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: >>> pad_str(info.model, sizeof(info.model));
405:
406: n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
-- Call #3 at line 412 --
410:
411: TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: >>> pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: TEE_MemFill(str + n, ' ', size - n); 284: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "pad_str", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"pad_str", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (pad_str)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "pad_str",
    "tainted_vars": [
      "str",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "strnlen((char *)str, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281"
      },
      {
        "lhs": "str + n",
        "rhs": "pointer arithmetic using n",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen used with size to bound n (n <= size)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 403,
      "function": "pad_str",
      "rule": "other",
      "why": "alias of TEE-private buffer info.manufacturer_id passed into pad_str from entry_ck_token_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 404,
      "function": "pad_str",
      "rule": "other",
      "why": "alias of TEE-private buffer info.model passed into pad_str from entry_ck_token_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "pad_str(info.model, sizeof(info.model));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 412,
      "function": "pad_str",
      "rule": "other",
      "why": "alias of TEE-private buffer info.serial_number passed into pad_str from entry_ck_token_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "pad_str(info.serial_number, sizeof(info.serial_number));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "pad_str",
      "rule": "other",
      "why": "fills bytes at str + n for length (size - n) using TEE_MemFill; write target depends on caller-provided pointer/size",
      "sink_function": "TEE_MemFill",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    }
  ]
}

関数: TEE_MemFill
プロンプト 中間 (TEE_MemFill)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemFill” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from pad_str at lines [283]:
-- Call #1 at line 283 --
281: int n = strnlen((char *)str, size);
282:
283: >>> TEE_MemFill(str + n, ' ', size - n);
284: }
285:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 283:
278:
279: static void pad_str(uint8_t *str, size_t size)
280: { 281: int n = strnlen((char *)str, size); 282: 283: >>> TEE_MemFill(str + n, ' ', size - n); 284: }
285:
286: static void set_token_description(struct pkcs11_slot_info *info)
287:     {
288:     	char desc[sizeof(info->slot_description) + 1] = { 0 };

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemFill",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemFill)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemFill",
    "tainted_vars": [
      "dst",
      "value",
      "len",
      "n",
      "size",
      "str"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "str + n (pointer arithmetic from caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      },
      {
        "lhs": "len",
        "rhs": "size - n",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:283"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281",
        "evidence": "strnlen(..., size) ensures n <= size so len = size - n is non-negative"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "alias of caller-provided buffer (str) passed derived (str + n) into TEE_MemFill; write target originates from caller",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size - n,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "rule": "other",
      "why": "fills len bytes at destination (dst) using caller-controlled size - n; write depends on caller pointer/size",
      "sink_function": "TEE_MemFill",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size - n,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemFill
- target_sink_lines: [283]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [283] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemFill",
    "lines": [
      283
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 283,
      "function": "pad_str",
      "sink_function": "TEE_MemFill",
      "status": "safe",
      "why": "Destination is a TA-local buffer slice (str + n) where n is bounded by strnlen(..., size) and pad_str is called with size equal to the known allocation; writes are bounded to size - n.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided pointer/size (info.* fields) via entry_ck_token_info -> pad_str",
      "propagation_path": [
        "params -> out (entry context) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c:166-167",
        "info.field initialized and passed to pad_str @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:403-412",
        "str + n derived and passed to TEE_MemFill @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:281-283"
      ],
      "sink": "TEE_MemFill writes spaces at str + n for length size - n"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Caller supplies malformed str/size such that size does not reflect actual allocation (not the observed case)",
        "Absence of strnlen or incorrect size usage"
      ],
      "attack_scenario": "If pad_str were invoked with an incorrect size smaller than the real buffer or with a caller-controlled pointer not pointing to the claimed allocation, TEE_MemFill could write out-of-bounds.",
      "impact": "Potential memory corruption within TA leading to crash or code-execution in worst case"
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "pad_str:281-283",
        "recommendation": "Validate that 'size' matches the actual allocation or pass explicit length derived from the actual buffer allocation site; consider using safe wrappers that take buffer and its allocation metadata."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "strnlen(..., size) bounds n to <= size",
        "pad_str callers pass size based on sizeof(known fields)"
      ],
      "negative_indicators": [
        "dst pointer (str) provenance depends on callers; if caller misreports size, potential risk exists"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Writes are bounded by strnlen and size, and callers use sizeof() of local fields, so TEE_MemFill at line 283 is not exposed to a tainted unbounded write in observed call-sites.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The write length is computed as size - n with n <= size (strnlen), and callers provide size tied to local allocations, preventing out-of-bounds write at this site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "pad_str:281",
      "evidence": "strnlen((char *)str, size) ensures n <= size"
    }
  ],
  "argument_safety": [
    {
      "arg": "str",
      "why_safe": "Called with pointers to TA-local fixed-size fields (info.manufacturer_id, info.model, info.serial_number).",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:403-412"
    },
    {
      "arg": "size",
      "why_safe": "Passed as sizeof(info.field) at call-sites, matching allocation size.",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:403-412"
    }
  ],
  "residual_risks": [
    "283: If callers pass incorrect size or a pointer not matching the claimed allocation, TEE_MemFill could write out-of-bounds."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Caller uses sizeof() for size and strnlen bounds n"
    ],
    "negative_indicators": [
      "General caller-controlled pointers/sizes could misreport allocation in other call-sites"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Observed call-sites use local, fixed-size buffers and size is validated/derived accordingly; sanitizer (strnlen) ensures bounded write length, so no vulnerability at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 167,
      "function": "entry_ck_token_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "alias of shared params buffer passed into callee; callee reads/writes memrefs sourced from REE.",
      "code_excerpt": "rc = entry_ck_token_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible); destination is shared though info appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 403,
      "function": "pad_str",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "why": "alias of TEE-private buffer info.manufacturer_id passed into pad_str from entry_ck_token_info",
      "code_excerpt": "pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 404,
      "function": "pad_str",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "why": "alias of TEE-private buffer info.model passed into pad_str from entry_ck_token_info",
      "code_excerpt": "pad_str(info.model, sizeof(info.model));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 412,
      "function": "pad_str",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "why": "alias of TEE-private buffer info.serial_number passed into pad_str from entry_ck_token_info",
      "code_excerpt": "pad_str(info.serial_number, sizeof(info.serial_number));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 283,
      "function": "TEE_MemFill",
      "sink_function": "TEE_MemFill",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size - n,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "fills len bytes at destination (dst) using caller-controlled size - n; write depends on caller pointer/size",
      "code_excerpt": "TEE_MemFill(str + n, ' ', size - n);"
    }
  ]
}
フロー #174: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> set_token_description -> TEE_GetPropertyAsUUID
安全
TA_InvokeCommandEntryPointentry_ck_slot_infoset_token_descriptionTEE_GetPropertyAsUUID

実行時間: 52.12秒

ターゲットシンク情報

シンク関数: TEE_GetPropertyAsUUID

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:293

パラメータインデックス: 2

解析結果

安全判定理由: The property API returns a TEE-managed UUID into a TA-private buffer; the call is not driven by REE input and effective overflow checks exist later for formatted output.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_GetPropertyAsUUID
プロンプト 中間 (TEE_GetPropertyAsUUID)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GetPropertyAsUUID” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_token_description at lines [293]:
-- Call #1 at line 293 --
291: int n = 0;
292:
293: >>> res = TEE_GetPropertyAsUUID(TEE_PROPSET_TEE_IMPLEMENTATION,
294: "gpd.tee.deviceID", &dev_id);
295:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 293:
288:     	char desc[sizeof(info->slot_description) + 1] = { 0 };
289:     	TEE_UUID dev_id = { };
290:     	TEE_Result res = TEE_ERROR_GENERIC;
291:     	int n = 0;
292:     
293: >>> 	res = TEE_GetPropertyAsUUID(TEE_PROPSET_TEE_IMPLEMENTATION,
294:     				    "gpd.tee.deviceID", &dev_id);
295:     	if (res == TEE_SUCCESS) {
296:     		n = snprintk(desc, sizeof(desc), PKCS11_SLOT_DESCRIPTION
297:     			     " - TEE UUID %pUl", (void *)&dev_id);
298:     	} else {

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetPropertyAsUUID",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GetPropertyAsUUID",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GetPropertyAsUUID)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GetPropertyAsUUID",
    "tainted_vars": [
      "dev_id",
      "res",
      "prop_name"
    ],
    "propagation": [
      {
        "lhs": "dev_id",
        "rhs": "TEE_GetPropertyAsUUID(...) writes UUID into dev_id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:293"
      },
      {
        "lhs": "res",
        "rhs": "return value of TEE_GetPropertyAsUUID",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:293-295"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 293,
      "function": "TEE_GetPropertyAsUUID",
      "rule": "other",
      "why": "Caller passes address of local dev_id into TEE_GetPropertyAsUUID (alias of TA-private buffer bound to callee parameter).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(dev_id)"
        ]
      },
      "code_excerpt": "res = TEE_GetPropertyAsUUID(TEE_PROPSET_TEE_IMPLEMENTATION, \"gpd.tee.deviceID\", &dev_id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 293,
      "function": "TEE_GetPropertyAsUUID",
      "rule": "other",
      "why": "Property name string literal passed to TEE API (binding of callee parameter to a TA-resident const string).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=sizeof(\"gpd.tee.deviceID\"),dst_sz=unknown"
        ]
      },
      "code_excerpt": "\"gpd.tee.deviceID\""
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GetPropertyAsUUID
- target_sink_lines: [293]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [293] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GetPropertyAsUUID",
    "lines": [
      293
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 293,
      "function": "set_token_description",
      "sink_function": "TEE_GetPropertyAsUUID",
      "status": "safe",
      "why": "TEE_GetPropertyAsUUID reads a TEE-resident property into a TA-private dev_id (not REE-controlled); no REE-tainted input reaches this API call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The property API returns a TEE-managed UUID into a TA-private buffer; the call is not driven by REE input and effective overflow checks exist later for formatted output.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "set_token_description:302-303",
      "evidence": "if (n < 0 || n >= (int)sizeof(desc)) TEE_Panic(0)"
    }
  ],
  "argument_safety": [
    {
      "arg": "&dev_id",
      "why_safe": "destination is TA-private buffer written by TEE API",
      "evidence": "pkcs11_token.c:288-295"
    },
    {
      "arg": "\"gpd.tee.deviceID\"",
      "why_safe": "constant string literal, not REE input",
      "evidence": "pkcs11_token.c:293-294"
    }
  ],
  "residual_risks": [
    "line 353: TA copies local struct info into caller-provided out->memref.buffer (REE-visible) — potential disclosure if info were sensitive",
    "line 366: TA copies rc into caller-provided params[0].memref.buffer (REE-visible) — structural shared-memory write"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "dev_id is populated from TEE property (not REE)",
      "explicit bounds check (TEE_Panic) prevents snprintf overflow"
    ],
    "negative_indicators": [
      "formatted output including dev_id is later copied into buffers that flow to REE (structural risk elsewhere)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "TEE_GetPropertyAsUUID at line 293 is not a REE-driven sink and writes into TA-private storage; sanitizers prevent local overflow. Related structural risks (copies into REE-visible buffers) are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 164,
      "function": "entry_ck_slot_info",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Alias: caller passes params into entry_ck_slot_info (shared buffer binding).",
      "code_excerpt": "rc = entry_ck_slot_info(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local struct info into caller-provided out->memref.buffer (REE-visible destination).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 305,
      "function": "set_token_description",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=sizeof(desc),dst_sz=sizeof(info->slot_description)"
        ]
      },
      "why": "Copies formatted desc into info->slot_description; although TA-private, this flows later to caller buffer.",
      "code_excerpt": "TEE_MemMove(info->slot_description, desc, n);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer (shared/REE-visible destination).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #175: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> set_token_description -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_slot_infoset_token_descriptionTEE_MemMove

実行時間: 87.34秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305

パラメータインデックス: 0

解析結果

詳細: Line 305 copies only into TA-private storage and has an explicit panic-on-overflow check for 'n'; therefore it is not a vulnerable sink. The relevant risk is the later copy to REE at line 353, which is reported as a structural risk.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_token_description at lines [305, 353, 411, 414, 420, 488, 538, 678, 810, 943, 1660]:
-- Call #1 at line 305 --
303: TEE_Panic(0);
304:
305: >>> TEE_MemMove(info->slot_description, desc, n);
306: pad_str(info->slot_description, sizeof(info->slot_description));
307: }
-- Call #2 at line 353 --
351:
352: out->memref.size = sizeof(info);
353: >>> TEE_MemMove(out->memref.buffer, &info, out->memref.size);
354:
355: return PKCS11_CKR_OK;
-- Call #3 at line 411 --
409: TEE_Panic(0);
410:
411: >>> TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
-- Call #4 at line 414 --
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: >>> TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));
415:
416: info.flags = token->db_main->flags;
-- Call #5 at line 420 --
418: info.rw_session_count = token->rw_session_count;
419:
420: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
421:
422: return PKCS11_CKR_OK;
-- Call #6 at line 488 --
486:
487: out->memref.size = count * sizeof(*array);
488: >>> TEE_MemMove(out->memref.buffer, array, out->memref.size);
489:
490: TEE_Free(array);
-- Call #7 at line 538 --
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
-- Call #8 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #9 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #10 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #11 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 305:
300: " - No TEE UUID");
301: }
302: if (n < 0 || n >= (int)sizeof(desc))
303: TEE_Panic(0);
304:
305: >>> TEE_MemMove(info->slot_description, desc, n);
306: pad_str(info->slot_description, sizeof(info->slot_description));
307: }
308:
309: enum pkcs11_rc entry_ck_slot_info(uint32_t ptypes, TEE_Param *params)
310:     {

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "info",
      "desc",
      "out->memref.buffer",
      "ctrl->memref.buffer",
      "array",
      "session->handle",
      "token->db_main->label",
      "buffer",
      "data"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "src (caller-provided) copied by TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&info",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353"
      },
      {
        "lhs": "info.serial_number",
        "rhs": "sn",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:411"
      },
      {
        "lhs": "info.label",
        "rhs": "token->db_main->label",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:414"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&info",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:420"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "array",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&info",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&session->handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&info",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810"
      },
      {
        "lhs": "token->db_main->label",
        "rhs": "label",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943"
      },
      {
        "lhs": "data",
        "rhs": "buffer (from TEE_GenerateRandom)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 305,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local formatted desc into info->slot_description (both TA-private) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=sizeof(desc),dst_sz=sizeof(info->slot_description)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info->slot_description, desc, n);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info struct into caller-provided out->memref.buffer (shared/REE-visible destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 411,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies sn into info.serial_number (TA-private fields) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info.serial_number),src_sz=sizeof(sn),dst_sz=sizeof(info.serial_number)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 414,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies token label into info.label (both TA-private) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info.label),src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=sizeof(info.label)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info into caller out->memref.buffer (shared/REE-visible destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 488,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies array (TA-allocated) into caller out->memref.buffer (REE-visible); caller size set just prior.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=count * sizeof(*array),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, array, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info into caller out buffer (REE-visible) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies session handle into caller out buffer (REE-visible destination).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies info into caller out buffer (REE-visible) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies label into token->db_main->label (TA-private destination) via TEE_MemMove.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies random bytes from TA-generated buffer into data (destination region depends on caller); source is TEE-generated random (non-sensitive by default).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [305]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [305] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      305
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 305,
      "function": "set_token_description",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies TA-formatted desc into TA-private info->slot_description; length 'n' is checked against sizeof(desc) with TEE_Panic on overflow, and destination is TA-private (no REE exposure at this line).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "local formatted string 'desc' (includes PKCS11_SLOT_DESCRIPTION and TEE UUID)",
      "propagation_path": [
        "desc -> info->slot_description @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305",
        "info (later) -> out->memref.buffer @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353"
      ],
      "sink": "TEE_MemMove(out->memref.buffer, &info, out->memref.size) at line 353 (REE-visible)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls caller-provided out->memref.buffer and sizes at entry to entry_ck_slot_info"
      ],
      "attack_scenario": "If upstream checks were bypassed, TA could copy info into REE-visible buffer at line 353 exposing slot info; but line 305 itself only writes to TA-private buffer with bounds enforced.",
      "impact": "Potential information disclosure at later REE-copy (line 353) if overall argument checks are bypassed; line 305 not directly exploitable."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "entry_ck_slot_info:333-334",
        "recommendation": "Ensure ptypes and out->memref.size validation cannot be bypassed and validate out->memref.buffer alignment/size before copying"
      },
      {
        "type": "access_control",
        "location": "entry_ck_slot_info:345-346",
        "recommendation": "Confirm get_token(token_id) correctly enforces token existence/authorization"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit bounds check (n < sizeof(desc)) with TEE_Panic prevents overflow at line 302-303",
        "Destination at line 305 is TA-private struct field"
      ],
      "negative_indicators": [
        "The same info struct is later copied into a caller-provided (REE-visible) buffer at line 353"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Line 305 copies only into TA-private storage and has an explicit panic-on-overflow check for 'n'; therefore it is not a vulnerable sink. The relevant risk is the later copy to REE at line 353, which is reported as a structural risk.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Bounds are enforced before the copy and the destination is TA-private at this line, so the copy at line 305 is not an information-disclosure or memory-safety vulnerability.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "set_token_description:302-303",
      "evidence": "if (n < 0 || n >= (int)sizeof(desc)) TEE_Panic(0)"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_slot_info:333-334",
      "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info) checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "desc",
      "why_safe": "Formatted locally with size-limited snprintf/snprintk and checked length 'n'",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:296-303"
    },
    {
      "arg": "info->slot_description",
      "why_safe": "Destination is TA-private at this call; later REE-copy is separate concern",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:305,353"
    }
  ],
  "residual_risks": [
    "line 353: info struct copied into caller-provided out->memref.buffer (REE-visible) — potential information disclosure if upstream validation is insufficient"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit overflow check and panic at lines 302-303",
      "Clear separation between TA-private copy (305) and later REE-copy (353)"
    ],
    "negative_indicators": [
      "Later copies to REE-visible buffers exist elsewhere in the flow"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line 305 is guarded by a bounds check and writes to TA-private memory; classification focuses on later REE-exposing copies rather than this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies local info struct into caller-provided out->memref.buffer (shared/REE-visible); this is a potential information-disclosure sink to the REE.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    }
  ]
}
フロー #176: TA_InvokeCommandEntryPoint -> entry_ck_slot_info -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_slot_infoTEE_MemMove

実行時間: 62.06秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353

パラメータインデックス: 0

解析結果

詳細: Size/type validations prevent buffer overflow and data copied is non-sensitive public slot metadata, so the TEE_MemMove at line 353 is not a vulnerability.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_slot_info at lines [353, 411, 414, 420, 488, 538, 678, 810, 943, 1660]:
-- Call #1 at line 353 --
351:
352: out->memref.size = sizeof(info);
353: >>> TEE_MemMove(out->memref.buffer, &info, out->memref.size);
354:
355: return PKCS11_CKR_OK;
-- Call #2 at line 411 --
409: TEE_Panic(0);
410:
411: >>> TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
-- Call #3 at line 414 --
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: >>> TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));
415:
416: info.flags = token->db_main->flags;
-- Call #4 at line 420 --
418: info.rw_session_count = token->rw_session_count;
419:
420: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
421:
422: return PKCS11_CKR_OK;
-- Call #5 at line 488 --
486:
487: out->memref.size = count * sizeof(*array);
488: >>> TEE_MemMove(out->memref.buffer, array, out->memref.size);
489:
490: TEE_Free(array);
-- Call #6 at line 538 --
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
-- Call #7 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #8 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #9 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #10 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 353:
348: set_token_description(&info);
349:
350: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
351:
352: out->memref.size = sizeof(info);
353: >>> TEE_MemMove(out->memref.buffer, &info, out->memref.size);
354:
355: return PKCS11_CKR_OK;
356: }
357:
358: enum pkcs11_rc entry_ck_token_info(uint32_t ptypes, TEE_Param *params)

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer (varies by call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353,411,414,420,488,538,678,810,943,1660"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (varies by call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353,411,414,420,488,538,678,810,943,1660"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length argument (varies by call-site)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353,411,414,420,488,538,678,810,943,1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination out->memref.buffer is caller-provided (REE-visible) and is bound to TEE_MemMove dst parameter (alias of shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 411,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies into local info.serial_number from sn; src is caller-influenced but destination is TA-private struct field.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(info.serial_number),src_sz=sizeof(info.serial_number),dst_sz=sizeof(info.serial_number)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 414,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies token label from token DB (TEE-private) into TA-private info.label field; binding of src to callee src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(info.label),src_sz=sizeof(info.label),dst_sz=sizeof(info.label)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info into caller-provided out->memref.buffer (alias of shared buffer passed as dst).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=sizeof(info)"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 488,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies array into caller-provided out->memref.buffer; dst aliases REE-visible buffer passed from caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=count * sizeof(*array),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, array, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info into caller-provided out->memref.buffer (binding dst to shared buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies session handle into caller-provided out buffer (dst is REE-visible from caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info into caller-provided out->memref.buffer; dst is alias of shared buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies caller-provided label into token DB field (dst is TA-private but src is REE-visible); binding src to callee src parameter.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Moves random bytes (generated by TEE_GenerateRandom) from buffer into data; src is TEE-private random, dst region unclear (binding shown).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [353]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [353] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      353
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination size out->memref.size was validated to equal sizeof(info) before call (ptypes checked), and data copied is local non-sensitive struct.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided params (ctrl/out memrefs)",
      "propagation_path": [
        "params -> out (params + 2) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:315-316",
        "out->memref.size checked == sizeof(info) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:333-334",
        "TEE_MemMove(out->memref.buffer, &info, out->memref.size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:353"
      ],
      "sink": "TEE_MemMove copying local info struct into REE-visible out->memref.buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "caller supplies params with out->memref.buffer pointing to REE buffer",
        "caller reachable to invoke PKCS11_CMD_SLOT_INFO"
      ],
      "attack_scenario": "Attacker supplies legitimate command; TA copies non-sensitive slot info into caller buffer (no secret exfiltration).",
      "impact": "Information disclosure unlikely (data is public slot metadata); memory safety preserved due to size check."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "entry_ck_slot_info:333-334",
        "recommendation": "Ensure caller is authorized to obtain slot info if policy requires access control."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "explicit check: out->memref.size == sizeof(info)",
        "ptypes validated against expected parameter types"
      ],
      "negative_indicators": [
        "destination buffer region is REE-visible (shared), but data labeled public",
        "no additional access-control check in this function"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Size/type validations prevent buffer overflow and data copied is non-sensitive public slot metadata, so the TEE_MemMove at line 353 is not a vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Parameter types and out->memref.size are validated to match sizeof(info), and info is public metadata, so no unsafe tainted→sink flow exists.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_slot_info:311-316,333-334",
      "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info)"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated and matches sizeof(info)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:333-334"
    }
  ],
  "residual_risks": [
    "Copying TA-held metadata into REE-visible memory may be undesirable if policy requires confidentiality of some fields (not evident here)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit size/type checks before copy",
      "info contents appear public (slot description/manufacturer/flags/versions)"
    ],
    "negative_indicators": [
      "dst is REE-visible shared memory"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks and lack of sensitive content in info justify marking the sink as safe.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 353,
      "function": "entry_ck_slot_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Local non-sensitive struct info copied into caller-provided REE-visible buffer (shared buffer alias).",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, out->memref.size);"
    }
  ]
}
フロー #177: TA_InvokeCommandEntryPoint -> entry_ck_token_info -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_token_infosnprintf

実行時間: 46.02秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406

パラメータインデックス: 0

解析結果

詳細: Memory-safety sanitizer (size check + panic) at the callsite prevents overflow into the TA stack buffer, and the immediate sink writes to TA-private memory; therefore snprintf at line 406 is not a vulnerable sink under the policy.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_info at lines [406]:
-- Call #1 at line 406 --
404: pad_str(info.model, sizeof(info.model));
405:
406: >>> n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
407: (int)sizeof(info.serial_number), token_id);
408: if (n != (int)sizeof(info.serial_number))

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 406:
401: return PKCS11_CKR_SLOT_ID_INVALID;
402:
403: pad_str(info.manufacturer_id, sizeof(info.manufacturer_id));
404: pad_str(info.model, sizeof(info.model));
405:
406: >>> n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
407: (int)sizeof(info.serial_number), token_id);
408: if (n != (int)sizeof(info.serial_number))
409: TEE_Panic(0);
410:
411: TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "snprintf", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"snprintf", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "sn",
      "sizeof(sn)",
      "token_id",
      "info.serial_number",
      "n"
    ],
    "propagation": [
      {
        "lhs": "sn (buffer)",
        "rhs": "snprintf writes formatted token_id into sn",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406"
      },
      {
        "lhs": "n",
        "rhs": "return value of snprintf indicating bytes written",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406-409"
      },
      {
        "lhs": "info.serial_number",
        "rhs": "TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:411"
      },
      {
        "lhs": "token_id",
        "rhs": "argument passed into snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406-407"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:408-409",
        "evidence": "checks that snprintf returned expected size and calls TEE_Panic(0) if not"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 406,
      "function": "snprintf",
      "rule": "other",
      "why": "Destination buffer 'sn' is a TA-local stack buffer (TEE-private) passed to snprintf which writes formatted data there; subsequent memmove copies it into info.serial_number.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=sizeof(sn)"
        ]
      },
      "code_excerpt": "n = snprintf(sn, sizeof(sn), \"%0*\"PRIu32, (int)sizeof(info.serial_number), token_id);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 406,
      "function": "snprintf",
      "rule": "other",
      "why": "Format string argument is a constant (TA-private) passed into snprintf; binding noted for pointer argument provenance.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=sizeof(sn)"
        ]
      },
      "code_excerpt": "n = snprintf(sn, sizeof(sn), \"%0*\"PRIu32, (int)sizeof(info.serial_number), token_id);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [406]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [406] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      406
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 406,
      "function": "entry_ck_token_info",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes formatted token_id into TA-local stack buffer 'sn' with a subsequent check ensuring the return size matches expected size (TEE_Panic on mismatch); destination is TEE-private.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token_id derived from ctrl->memref.buffer (caller/REE-provided)",
      "propagation_path": [
        "params[0]/ctrl->memref.buffer -> serialargs_get -> token_id @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:390-394",
        "token_id -> snprintf(sn, ...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406",
        "sn -> TEE_MemMove(info.serial_number, sn, ...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:411"
      ],
      "sink": "snprintf writing into TA-local buffer 'sn'"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious/controlled token_id value in ctrl memref from REE"
      ],
      "attack_scenario": "An attacker supplies crafted token_id; snprintf formats it into TA-local buffer 'sn', but bounds check aborts on mismatch so overflow is prevented.",
      "impact": "If sanitizer absent, could cause stack corruption; with present check impact is limited to TA panic (denial of service)."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "entry_ck_token_info:408-409",
        "recommendation": "Retain explicit size checks; consider using snprintf return value defensively without panicking in production, and ensure constant-time or validated formatting if exposing to REE."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "explicit check of snprintf return value against expected size at lines 408-409",
        "destination buffer 'sn' is TA-local (not directly REE-visible) at formatting point"
      ],
      "negative_indicators": [
        "token_id originates from REE-controlled params buffer (tainted source)",
        "formatted result is later copied into out->memref.buffer (REE-visible) at a different line"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety sanitizer (size check + panic) at the callsite prevents overflow into the TA stack buffer, and the immediate sink writes to TA-private memory; therefore snprintf at line 406 is not a vulnerable sink under the policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf writes to a TEE-private buffer and is followed by an explicit size check that aborts on mismatch, preventing overflow and unintended disclosure at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "entry_ck_token_info:408-409",
      "evidence": "if (n != (int)sizeof(info.serial_number)) TEE_Panic(0);"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_token_info:387-388",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "sn (buffer)",
      "why_safe": "TA-local stack buffer sized by sizeof(sn) and snprintf limited by sizeof(sn)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:406"
    },
    {
      "arg": "token_id",
      "why_safe": "token_id parsed with serialargs_get and serialargs_remaining_bytes ensures only expected bytes present",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:392-397"
    }
  ],
  "residual_risks": [
    "line 411 copies info.serial_number into out->memref.buffer (REE-visible); although info appears public, downstream disclosure to REE exists and should be reviewed"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit snprintf size check and panic",
      "writing target is TA-private at this site"
    ],
    "negative_indicators": [
      "source token_id is REE-controlled",
      "formatted data later flows to REE at a different site"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The snprintf call itself is protected by a strict size check and writes only to TEE-private memory; memory-safety concerns are mitigated making this sink not vulnerable under given rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 411,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info.serial_number),src_sz=sizeof(info.serial_number),dst_sz=out->memref.size"
        ]
      },
      "why": "TA-local serial string 'sn' (filled by snprintf) is copied into caller-provided out->memref.buffer; destination is REE-visible though data appears non-sensitive.",
      "code_excerpt": "TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));"
    }
  ]
}
フロー #178: TA_InvokeCommandEntryPoint -> entry_ck_token_info -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_infoTEE_MemMove

実行時間: 39.76秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:411, 414, 420

パラメータインデックス: 0

解析結果

安全判定理由: All three calls either operate entirely in TEE-private memory or copy only public/token-metadata to REE with explicit size/type validation; no tainted secret is sent to REE and bounds/type checks exist.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_info at lines [411, 414, 420, 488, 538, 678, 810, 943, 1660]:
-- Call #1 at line 411 --
409: TEE_Panic(0);
410:
411: >>> TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
-- Call #2 at line 414 --
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: >>> TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));
415:
416: info.flags = token->db_main->flags;
-- Call #3 at line 420 --
418: info.rw_session_count = token->rw_session_count;
419:
420: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
421:
422: return PKCS11_CKR_OK;
-- Call #4 at line 488 --
486:
487: out->memref.size = count * sizeof(*array);
488: >>> TEE_MemMove(out->memref.buffer, array, out->memref.size);
489:
490: TEE_Free(array);
-- Call #5 at line 538 --
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
-- Call #6 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #7 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #8 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #9 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at lines [411, 414, 420]:
406: n = snprintf(sn, sizeof(sn), "%0*"PRIu32,
407: (int)sizeof(info.serial_number), token_id);
408: if (n != (int)sizeof(info.serial_number))
409: TEE_Panic(0);
410:
411: >>> TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));
412: pad_str(info.serial_number, sizeof(info.serial_number));
413:
414: >>> TEE_MemMove(info.label, token->db_main->label, sizeof(info.label));
415:
416: info.flags = token->db_main->flags;
417: info.session_count = token->session_count;
418: info.rw_session_count = token->rw_session_count;
419:
420: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
421:
422: return PKCS11_CKR_OK;
423: }
424:
425: static void dmsg_print_supported_mechanism(unsigned int token_id __maybe_unused,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "info.serial_number",
      "sn",
      "out->memref.buffer",
      "info",
      "buffer",
      "data"
    ],
    "propagation": [
      {
        "lhs": "dest <- caller arg",
        "rhs": "caller-provided destination pointer",
        "site": "multiple call-sites (see call context)"
      },
      {
        "lhs": "src <- caller arg",
        "rhs": "caller-provided source pointer",
        "site": "multiple call-sites (see call context)"
      },
      {
        "lhs": "copy_len n",
        "rhs": "size argument passed by caller",
        "site": "multiple call-sites (see call context)"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 411,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from local sn into info.serial_number (both TA-local buffers); binding shows both src/dst are TEE-private, so no REE boundary but still a data movement site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info.serial_number),src_sz=sizeof(info.serial_number),dst_sz=sizeof(info.serial_number)"
        ]
      },
      "code_excerpt": "TEE_MemMove(info.serial_number, sn, sizeof(info.serial_number));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 420,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies TA-local struct info into caller-provided out->memref.buffer (REE-visible); binding records shared destination originating from REE params.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from buffer filled by TEE_GenerateRandom into data; origins ambiguous across call-sites (buffer is TA-generated random, data's region unclear).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [411, 414, 420]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [411, 414, 420] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      411,
      414,
      420
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 411,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies from local sn (TA-private) into info.serial_number (TA-private); both source and destination are TEE-private and no tainted REE data flows to REE here.",
      "rule_id": "other"
    },
    {
      "line": 414,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies token->db_main->label (TA-managed token DB, TEE-private) into info.label (TA-private); no REE-visible destination or sensitive promotion.",
      "rule_id": "other"
    },
    {
      "line": 420,
      "function": "entry_ck_token_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies TA-local struct info into out->memref.buffer (REE-visible) but out->memref.size was validated to equal sizeof(info) and info contains public/token metadata (no secret evidence), so not promoted to unencrypted_output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "All three calls either operate entirely in TEE-private memory or copy only public/token-metadata to REE with explicit size/type validation; no tainted secret is sent to REE and bounds/type checks exist.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_info:387-388",
      "evidence": "ptypes == exp_pt and out->memref.size == sizeof(info)"
    },
    {
      "type": "bounds_check",
      "location": "TA_InvokeCommandEntryPoint:133-137",
      "evidence": "params[0].memref.size checked against sizeof(rc)"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated against sizeof(info)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:387-388"
    },
    {
      "arg": "sn, info.serial_number, info.label",
      "why_safe": "all TA-local buffers or token DB fields (TEE-private)",
      "evidence": "pkcs11_token.c:406-415"
    }
  ],
  "residual_risks": [
    "None"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit ptypes and out->memref.size validation before copy",
      "Source buffers for lines 411/414 are TA-private",
      "info appears to contain public/token metadata (manufacturer/model/serial/label)"
    ],
    "negative_indicators": [
      "out->memref.buffer is REE-visible which is an output channel (but size/type validated)",
      "Broader call-site bindings show REE-originated params overall, so future changes could alter sensitivity"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (size equality) and lack of sensitive data in info prevent classification as unencrypted_output; copies within TEE-private memory are not REE disclosures.",
  "structural_risks": []
}
フロー #179: TA_InvokeCommandEntryPoint -> entry_ck_token_mecha_ids -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_ck_token_mecha_idsTEE_MemMove

実行時間: 79.38秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided params[2].memref.size and params[2].memref.buffer (out)

シンク: TEE_MemMove copying out->memref.size bytes into REE-visible out->memref.buffer

判定理由: The copy length is attacker-controlled and upstream logic can produce a mismatch between the allocated src size and the requested copy length; sanitization is present but relies on interactions with allocation behavior (unknown), so a weakness in input validation remains.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_mecha_ids at lines [488, 538, 678, 810, 943, 1660]:
-- Call #1 at line 488 --
486:
487: out->memref.size = count * sizeof(*array);
488: >>> TEE_MemMove(out->memref.buffer, array, out->memref.size);
489:
490: TEE_Free(array);
-- Call #2 at line 538 --
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
-- Call #3 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #4 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #5 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #6 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 488:
483: return PKCS11_CKR_DEVICE_MEMORY;
484:
485: dmsg_print_supported_mechanism(token_id, array, count);
486:
487: out->memref.size = count * sizeof(*array);
488: >>> TEE_MemMove(out->memref.buffer, array, out->memref.size);
489:
490: TEE_Free(array);
491:
492: return rc;
493: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "out->memref.buffer",
      "array",
      "&info",
      "session->handle",
      "token->db_main->label",
      "data",
      "buffer"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer (e.g., out->memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (e.g., array or &info)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488,538,678,810,943,1660"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length argument (e.g., out->memref.size, sizeof(info), PKCS11_TOKEN_LABEL_SIZE, count)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488,538,678,810,943,1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 488,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=unknown,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, array, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 488,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter aliases TA-allocated 'array' (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=out->memref.size,src_sz=count*sizeof(*array),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, array, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter is address of TA-local 'info' (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible) at session handle return.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter is TA-local session->handle (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter aliases caller's out->memref.buffer (REE-visible) when returning info.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter is TA-local 'info' struct (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter aliases TA-local token DB label buffer (TEE-private) being written to by caller before move.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter 'label' originates from REE (caller-provided).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination parameter 'data' (TA buffer being filled) is TA-managed (unknown allocation provenance).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source parameter 'buffer' was filled by TEE_GenerateRandom (non-sensitive random by default) before the move.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [488]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [488] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      488
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 488,
      "function": "entry_ck_token_mecha_ids",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies out->memref.size bytes (derived from REE-provided out->memref.size) from TA-allocated array; upstream sizing logic can lead to a mismatch where src allocation size < copy length, enabling over-read/overflow.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided params[2].memref.size and params[2].memref.buffer (out)",
      "propagation_path": [
        "params -> out = params + 2 @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:445-446",
        "count <- out->memref.size / sizeof(*array) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:470",
        "array <- tee_malloc_mechanism_list(&count) (allocation influenced by count) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:471",
        "TEE_MemMove(out->memref.buffer, array, out->memref.size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:488"
      ],
      "sink": "TEE_MemMove copying out->memref.size bytes into REE-visible out->memref.buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls params[2].memref.size and provides a REE buffer",
        "tee_malloc_mechanism_list may allocate fewer bytes than implied by out->memref.size-derived count (or integer division/truncation causes mismatch)"
      ],
      "attack_scenario": "Malformed out->memref.size leads code to compute count and allocate an 'array' smaller than out->memref.size; TEE_MemMove then reads past 'array' causing TA memory disclosure or crash.",
      "impact": "Out-of-bounds read of TA memory (information disclosure) or crash/denial-of-service."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "entry_ck_token_mecha_ids:470-488",
        "recommendation": "Validate that allocated array size (count*sizeof(*array)) is >= out->memref.size before calling TEE_MemMove; handle mismatch without proceeding to copy."
      },
      {
        "type": "range_check",
        "location": "entry_ck_token_mecha_ids:471",
        "recommendation": "Sanitize and clamp count derived from out->memref.size to reasonable maximums and check for integer overflows before allocation."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Copy length (out->memref.size) is directly derived from REE-controlled input",
        "TEE_MemMove uses out->memref.size as copy_len"
      ],
      "negative_indicators": [
        "There is an earlier branch attempting to reconcile sizes (lines 473-479) that may prevent some mismatch cases",
        "Behavior of tee_malloc_mechanism_list(&count) is unknown and may adjust count to safe value"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The copy length is attacker-controlled and upstream logic can produce a mismatch between the allocated src size and the requested copy length; sanitization is present but relies on interactions with allocation behavior (unknown), so a weakness in input validation remains.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
        "line": 488,
        "function": "entry_ck_token_mecha_ids",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove copies out->memref.size bytes where out->memref.size is derived from REE and may exceed the actual allocated source buffer (array)."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_mecha_ids:454-456",
      "evidence": "ptypes must equal expected exp_pt or function returns PKCS11_CKR_ARGUMENTS_BAD"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_mecha_ids:473-479",
      "evidence": "if (out->memref.size < count * sizeof(*array)) { adjust out->memref.size; return BUFFER_TOO_SMALL/OK }"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.size",
      "why_safe": "Checked against count*sizeof(*array) and used to signal BUFFER_TOO_SMALL when insufficient",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:473-479"
    },
    {
      "arg": "array",
      "why_safe": "Returned from tee_malloc_mechanism_list and checked for NULL",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:471,482-483"
    }
  ],
  "residual_risks": [
    "line 488: potential information disclosure (unencrypted_output) if TA-private sensitive data in 'array' reaches REE; memory-safety precedence reported weak_input_validation instead"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct use of REE-provided size as copy length",
      "TEE_MemMove invoked with those values"
    ],
    "negative_indicators": [
      "Intervening checks and allocation behavior (tee_malloc_mechanism_list) are not fully visible"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given REE-controlled copy length and the potential for mismatch between allocated source size and requested copy, this is classified as a weak input validation vulnerability with medium confidence; memory-safety issues take priority over information-disclosure labeling.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 170,
      "function": "entry_ck_token_mecha_ids",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: callee params pointer aliases caller-provided params (REE-visible).",
      "code_excerpt": "rc = entry_ck_token_mecha_ids(ptypes, params);"
    }
  ]
}
フロー #180: TA_InvokeCommandEntryPoint -> entry_ck_token_mecha_info -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_mecha_infoTEE_MemMove

実行時間: 48.25秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538

パラメータインデックス: 0

解析結果

安全判定理由: The call copies a TA-local, non-sensitive info struct into a caller-provided buffer but the code enforces out->memref.size == sizeof(info) before the call, preventing size mismatch; info is public.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_mecha_info at lines [538, 678, 810, 943, 1660]:
-- Call #1 at line 538 --
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
-- Call #2 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #3 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #4 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #5 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 538:
533: info.flags = mechanism_supported_flags(type);
534:
535: pkcs11_mechanism_supported_key_sizes(type, &info.min_key_size,
536: &info.max_key_size);
537:
538: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
539:
540: DMSG("PKCS11 token %"PRIu32": mechanism 0x%"PRIx32" info",
541: token_id, type);
542:
543: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538,678,810,943,1660"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538,678,810,943,1660"
      },
      {
        "lhs": "n",
        "rhs": "caller-provided size argument",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:538,678,810,943,1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binds callee dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA-local &info — alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binds dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA session handle — alias of shared buffer passed into helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binds dest to caller-provided out->memref.buffer (shared/REE-visible) and src to TA-local info structure",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site copies label into token->db_main->label; dest is TA-private while source 'label' provenance is unclear (likely REE-origin), so alias binding recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site moves random bytes from buffer (generated by TEE_GenerateRandom) into data; both source and dest are TA-private — internal copy recorded",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [538]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [538] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      538
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 538,
      "function": "entry_ck_token_mecha_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is REE-visible but out->memref.size was validated to equal sizeof(info) and src (info) is TA-constructed public data, so no overflow or sensitive leakage detected.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call copies a TA-local, non-sensitive info struct into a caller-provided buffer but the code enforces out->memref.size == sizeof(info) before the call, preventing size mismatch; info is public.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_mecha_info:497-501,510-511",
      "evidence": "ptypes compared to expected TEE_PARAM_TYPES and out->memref.size == sizeof(info)"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_mecha_info:515-524",
      "evidence": "serialargs_get used for token_id and type and serialargs_remaining_bytes checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated against sizeof(info) before use",
      "evidence": "pkcs11_token.c:510-511"
    },
    {
      "arg": "&info (src)",
      "why_safe": "TA-initialized structure populated from validated inputs and internal functions",
      "evidence": "pkcs11_token.c:533-536"
    }
  ],
  "residual_risks": [
    "line 538: copying TA-produced plaintext into REE-visible buffer is structurally recorded though info is public (no sensitive data) — monitor if future changes introduce secrets"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit check out->memref.size == sizeof(info) immediately prior to copy",
      "info is built from internal functions (mechanism_supported_flags, pkcs11_mechanism_supported_key_sizes) and not named/used as secret"
    ],
    "negative_indicators": [
      "dst_region is REE-visible (shared) so future changes could expose sensitive data if code evolves",
      "some call-sites use out->memref.buffer for various types; reliance on caller to provide correct buffer"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety (bounds) check exists and prevents overflow; the data copied is public/non-sensitive, so conditions for unencrypted_output are not met.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 538,
      "function": "entry_ck_token_mecha_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies TA-constructed info into caller-provided out->memref.buffer (shared/REE-visible); size check enforced but structural aliasing to shared buffer remains a risk if semantics change.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    }
  ]
}
フロー #181: TA_InvokeCommandEntryPoint -> entry_ck_open_session -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_open_sessionTEE_MemMove

実行時間: 47.20秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678

パラメータインデックス: 0

解析結果

安全判定理由: Call copies a non-sensitive session handle into a caller-provided MEMREF_OUTPUT that was type/size-validated earlier, so neither memory-safety nor sensitive-data disclosure conditions are met.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_open_session at lines [678, 810, 943, 1660]:
-- Call #1 at line 678 --
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
-- Call #2 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #3 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #4 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 678:
673:
674: session->token->session_count++;
675: if (!readonly)
676: session->token->rw_session_count++;
677:
678: >>> TEE_MemMove(out->memref.buffer, &session->handle,
679: sizeof(session->handle));
680:
681: DMSG("Open PKCS11 session %"PRIu32, session->handle);
682:
683: return PKCS11_CKR_OK;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "out->memref.buffer",
      "session->handle",
      "info",
      "token->db_main->label",
      "label",
      "data",
      "buffer",
      "count"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678,810,943,1660"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678,810,943,1660"
      },
      {
        "lhs": "len",
        "rhs": "caller-provided length argument",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:678,810,943,1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 678,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies session->handle (TEE-private) into caller-provided out->memref.buffer (REE-visible), binding callee dest/src to shared/TEE origins.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(session->handle),src_sz=sizeof(session->handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &session->handle, sizeof(session->handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies local info (TEE-private) into caller-provided out->memref.buffer (REE-visible), binding callee params to shared/TEE origins.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from 'label' into token->db_main->label; source provenance unclear (could be REE), destination is TEE-private—binding observed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=unknown,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies random bytes from buffer (produced by TEE_GenerateRandom, TEE-private) into 'data' whose provenance is unclear; binding observed and labeled as random.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [678]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [678] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      678
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 678,
      "function": "entry_ck_open_session",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination out->memref.buffer is REE-visible but out->memref.size was validated against sizeof(session->handle) earlier and the copied value (session handle) is not classified sensitive, so no unsafe disclosure or size violation at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Call copies a non-sensitive session handle into a caller-provided MEMREF_OUTPUT that was type/size-validated earlier, so neither memory-safety nor sensitive-data disclosure conditions are met.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_open_session:601-617",
      "evidence": "ptypes compared to expected TEE_PARAM_TYPES and out->memref.size checked against sizeof(session->handle)"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_open_session:621-630",
      "evidence": "serialargs_get used for token_id/flags and serialargs_remaining_bytes checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.size",
      "why_safe": "validated equals sizeof(session->handle)",
      "evidence": "file:/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:615-617"
    },
    {
      "arg": "out->memref.buffer",
      "why_safe": "destination size validated before write",
      "evidence": "file:/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:615-617"
    }
  ],
  "residual_risks": [
    "session handle is written to REE-visible memory (MEMREF_OUTPUT) — classification as sensitive would change decision; currently labeled public",
    "other TEE_MemMove sites copy data with unclear provenance (e.g., token label, random buffer) and deserve separate review"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ptypes/type check and out->memref.size comparison against sizeof(session->handle)",
      "session handle source is local/TEE-side and not named with sensitive cues"
    ],
    "negative_indicators": [
      "caller-provided buffer is REE-visible (shared) — structural risk remains if sensitivity assumptions change",
      "some other TEE_MemMove uses in the code copy data with unknown provenance"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks prevent overflow and the copied value is not sensitive per naming/usage heuristics, so the sink at line 678 is not vulnerable under the given policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided params[0].memref.buffer (REE-visible); destination is shared though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=unknown,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "why": "TEE_MemMove copies label into token DB; source provenance unclear (could be REE), so structural risk flagged.",
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    }
  ]
}
フロー #182: TA_InvokeCommandEntryPoint -> entry_ck_session_info -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_session_infoTEE_MemMove

実行時間: 63.79秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810

パラメータインデックス: 0

解析結果

安全判定理由: The call copies a TA-local non-sensitive struct into a caller-provided memref but the function enforces ptypes==exp_pt and out->memref.size == sizeof(info), preventing size/bounds issues and no evidence that 'info' is a secret.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_session_info at lines [810, 943, 1660]:
-- Call #1 at line 810 --
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
-- Call #2 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #3 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 810:
805: info.slot_id = get_token_id(session->token);
806: info.state = session->state;
807: if (pkcs11_session_is_read_write(session))
808: info.flags |= PKCS11_CKFSS_RW_SESSION;
809:
810: >>> TEE_MemMove(out->memref.buffer, &info, sizeof(info));
811:
812: DMSG("Get find on PKCS11 session %"PRIu32, session->handle);
813:
814: return PKCS11_CKR_OK;
815: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "out->memref.buffer",
      "&info",
      "token->db_main->label",
      "label",
      "buffer",
      "data",
      "count"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "out->memref.buffer (caller-provided memref)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810"
      },
      {
        "lhs": "src",
        "rhs": "&info (local TA-private struct)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:810"
      },
      {
        "lhs": "dst",
        "rhs": "token->db_main->label",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943"
      },
      {
        "lhs": "src",
        "rhs": "label (origin unclear)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943"
      },
      {
        "lhs": "dst",
        "rhs": "data (destination pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1660"
      },
      {
        "lhs": "src",
        "rhs": "buffer (filled by TEE_GenerateRandom)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659-1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination is caller-provided memref buffer (REE-visible) while source is TA-private struct 'info'; binding shows TA writing into REE-shared memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source '&info' is TA-private and is copied into a REE-visible buffer (out->memref.buffer); records binding of callee src parameter to TA-private origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination token label field is TA-internal (TEE-private); binding records callee dst param aliasing TA storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=unknown,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'label' origin is unclear (could be REE-provided); binding records callee src param origin uncertainty.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=unknown,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source 'buffer' is filled by TEE_GenerateRandom (TA-private random) then moved; binding records src as TA-private random.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'data' region is unclear at this site (could be TA-private or REE-visible); binding records uncertainty which is a structural risk.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [810]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [810] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      810
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 810,
      "function": "entry_ck_session_info",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination out->memref.size was validated to equal sizeof(info) and source is TA-local struct; copy length matches validated dst size so no bounds or secret‑leak evidence at this site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call copies a TA-local non-sensitive struct into a caller-provided memref but the function enforces ptypes==exp_pt and out->memref.size == sizeof(info), preventing size/bounds issues and no evidence that 'info' is a secret.",
  "effective_sanitizers": [
    {
      "type": "type_validation|bounds_check",
      "location": "entry_ck_session_info:793-794",
      "evidence": "if (!client || ptypes != exp_pt || out->memref.size != sizeof(info)) return PKCS11_CKR_ARGUMENTS_BAD"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size validated equals sizeof(info)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:793-794"
    },
    {
      "arg": "&info",
      "why_safe": "source is TA-local struct initialized from internal session state (not marked secret)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:789-810"
    }
  ],
  "residual_risks": [
    "structural: caller-provided params are REE-visible which allows TA->REE writes here; if 'info' semantics change to include sensitive fields this would become unencrypted_output"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ptypes and size check before copy",
      "source is TA-local struct, not derived from REE secrets"
    ],
    "negative_indicators": [
      "upstream entry point did not validate ptypes for this specific command (validation is performed here), and caller-provided memref origin is REE"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory‑safety checks at entry_ck_session_info ensure copy_len equals the validated destination size; the data copied is TA-local session info with no evidence of sensitive content, so it does not meet promotion criteria for unencrypted_output and there is no bounds vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 810,
      "function": "entry_ck_session_info",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:session",
          "size_triplet:copy_len=sizeof(info),src_sz=sizeof(info),dst_sz=out->memref.size"
        ]
      },
      "why": "TA-local session info is copied into a REE-visible memref; structurally this is TA->REE data flow which would be sensitive if 'info' contained secrets.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &info, sizeof(info));"
    }
  ]
}
フロー #183: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_token_initializeTEE_MemMove

実行時間: 57.39秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943

パラメータインデックス: 0

解析結果

詳細: TEE_MemMove at line 943 copies REE-originated data into TA-private storage but parsing routines perform bounds checks; destination is not REE-visible so does not meet unencrypted_output promotion criteria.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_initialize at lines [943, 1660]:
-- Call #1 at line 943 --
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
-- Call #2 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 943:
938: PKCS11_CKFT_SO_PIN_FINAL_TRY |
939: PKCS11_CKFT_SO_PIN_LOCKED |
940: PKCS11_CKFT_SO_PIN_TO_BE_CHANGED);
941: token->db_main->so_pin_count = 0;
942:
943: >>> TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);
944: token->db_main->flags |= PKCS11_CKFT_TOKEN_INITIALIZED;
945:
946: token->db_main->user_pin_salt = 0;
947: token->db_main->flags &= ~(PKCS11_CKFT_USER_PIN_INITIALIZED |
948: PKCS11_CKFT_USER_PIN_COUNT_LOW |

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "token->db_main->label",
      "label",
      "data",
      "buffer",
      "count"
    ],
    "propagation": [
      {
        "lhs": "token->db_main->label",
        "rhs": "label (local filled from serialargs -> originates from params memref.buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943"
      },
      {
        "lhs": "label",
        "rhs": "ctrlargs serialargs_get from ctrl->memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:848-852"
      },
      {
        "lhs": "data",
        "rhs": "buffer (filled by TEE_GenerateRandom)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659-1660"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:856-857",
        "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> error if leftover"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to token->db_main->label (TA-private destination) at call-site; destination is TA storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 943,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Binding src parameter to 'label' which was populated from caller-controlled serialargs (REE-origin); input may be attacker-controlled.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=PKCS11_TOKEN_LABEL_SIZE,src_sz=PKCS11_TOKEN_LABEL_SIZE,dst_sz=PKCS11_TOKEN_LABEL_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dest parameter to 'data' at call-site; destination region unclear in this context.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter to 'buffer' filled by TEE_GenerateRandom (TEE-private random source).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=count,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [943]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [943] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      943
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 943,
      "function": "entry_ck_token_initialize",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is TA-private (token->db_main->label) while source ('label') originates from REE but was parsed via serialargs with remaining-bytes check; no evidence of REE-visible destination or missing bounds check at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer (REE-visible)",
      "propagation_path": [
        "params -> ctrl (/ta/pkcs11_token.c:829)",
        "ctrl->memref.buffer -> ctrlargs (serialargs_init) (/ta/pkcs11_token.c:838)",
        "ctrlargs -> label (serialargs_get) (/ta/pkcs11_token.c:848)",
        "label -> TEE_MemMove dest token->db_main->label (/ta/pkcs11_token.c:943)"
      ],
      "sink": "TEE_MemMove(token->db_main->label, label, PKCS11_TOKEN_LABEL_SIZE) (TA-private destination)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls params[0].memref.buffer supplied by REE",
        "serialargs parsing does not abort (valid sizes/format)"
      ],
      "attack_scenario": "Malicious REE-provided label content is copied into TA-private token label, possibly causing policy/semantics issues but not direct disclosure to REE.",
      "impact": "Low: incorrect/attacker-controlled label stored in TA persistent DB; no immediate secret disclosure."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "entry_ck_token_initialize:unknown",
        "recommendation": "Validate caller authorization for initializing token label (ensure caller has SO privileges) before accepting label from REE."
      },
      {
        "type": "type_validation",
        "location": "entry_ck_token_initialize:848-856",
        "recommendation": "Ensure serialargs_get enforces exact bounds and that label content is validated (printable length, encoding) before storing."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "serialargs_remaining_bytes check present",
        "explicit pin_size bounds check elsewhere",
        "destination is TA-private"
      ],
      "negative_indicators": [
        "origin of 'label' is REE-controlled",
        "caller authorization checks not evident in this snippet"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "TEE_MemMove at line 943 copies REE-originated data into TA-private storage but parsing routines perform bounds checks; destination is not REE-visible so does not meet unencrypted_output promotion criteria.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Bounds/type checks (ptype match and serialargs_remaining_bytes) and TA-private destination mean the copy does not disclose TA secrets to REE nor show an obvious overflow at this site.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_initialize:835-836",
      "evidence": "exp_pt compared against ptypes; returns error if mismatch"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_initialize:856-857",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> error if leftover"
    }
  ],
  "argument_safety": [
    {
      "arg": "params[0].memref.buffer",
      "why_safe": "Consumed via serialargs_get/serialargs_get_ptr with remaining-bytes validation",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:838-857"
    },
    {
      "arg": "token->db_main->label",
      "why_safe": "Destination is TA-private storage, not returned to REE at this call",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:943"
    }
  ],
  "residual_risks": [
    "line 943: storing attacker-controlled label into persistent TA DB may allow spoofing or policy issues (authorization checks not evident)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "serialargs_remaining_bytes check",
      "ptype validation earlier"
    ],
    "negative_indicators": [
      "label originates from REE",
      "no explicit authorization check visible"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and information-disclosure promotion rules do not flag line 943: copy is bounded and into TA-private memory, so not an unencrypted REE output; remaining risk is semantic (authorization) which is structural.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 190,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "why": "alias of shared buffer passed into helper (params forwarded as ctrl); caller-provided memref flows into TA parsing routines",
      "code_excerpt": "rc = entry_ck_token_initialize(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns pointer into caller-controlled memref using pin_size derived from REE input; containment relies on serialargs implementation",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    }
  ]
}
フロー #184: TA_InvokeCommandEntryPoint -> entry_ck_generate_random -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_ck_generate_randomTEE_GenerateRandom

実行時間: 40.23秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659

パラメータインデックス: 0

解析結果

安全判定理由: TEE_GenerateRandom writes random (non-sensitive by default) into a TA-private buffer; the subsequent REE-visible copy occurs on a different line not under evaluation here.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_generate_random at lines [1659]:
-- Call #1 at line 1659 --
1657: size_t count = MIN(left, buffer_size);
1658:
1659: >>> TEE_GenerateRandom(buffer, count);
1660: TEE_MemMove(data, buffer, count);
1661:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 1659:
1654: left = out->memref.size;
1655:
1656: while (left) { 1657: size_t count = MIN(left, buffer_size); 1658: 1659: >>> TEE_GenerateRandom(buffer, count); 1660: TEE_MemMove(data, buffer, count); 1661: 1662: data += count; 1663: left -= count; 1664: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_GenerateRandom", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_GenerateRandom", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "buffer",
      "count",
      "left",
      "out->memref.size",
      "buffer_size"
    ],
    "propagation": [
      {
        "lhs": "buffer",
        "rhs": "caller-local TA buffer passed into TEE_GenerateRandom",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1659"
      },
      {
        "lhs": "count",
        "rhs": "MIN(left, buffer_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1657-1658"
      },
      {
        "lhs": "left",
        "rhs": "out->memref.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1654"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1659,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Binding of callee buffer parameter to a TA-allocated buffer (TEE_Malloc) at call-site; records origin and that generated bytes (random) are written into this buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=buffer_size"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [1659]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [1659] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      1659
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 1659,
      "function": "entry_ck_generate_random",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "Generates random into a TA-private buffer; data is random (policy non-sensitive) and no direct REE-copy occurs on this line.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "TEE_GenerateRandom writes random (non-sensitive by default) into a TA-private buffer; the subsequent REE-visible copy occurs on a different line not under evaluation here.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_generate_random:1630-1631",
      "evidence": "checks ptypes == expected TEE_PARAM_TYPES"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_generate_random:1642-1646",
      "evidence": "rejects non-zero size with null buffer and returns OK for zero size"
    },
    {
      "type": "allocation_check",
      "location": "entry_ck_generate_random:1649-1651",
      "evidence": "checks TEE_Malloc result and returns on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "buffer",
      "why_safe": "allocated via TEE_Malloc and used with bounded counts",
      "evidence": "pkcs11_token.c:1648-1651"
    },
    {
      "arg": "count",
      "why_safe": "derived from MIN(left, buffer_size) where buffer_size is bounded",
      "evidence": "pkcs11_token.c:1657-1658"
    }
  ],
  "residual_risks": [
    "line 1660: TA-private random copied into REE-visible out->memref.buffer via TEE_MemMove (could be structural disclosure) - not evaluated as part of target line 1659"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "TEE_GenerateRandom writes into TA-private buffer (TEE_Malloc) at 1649",
      "count is bounded via MIN(left, buffer_size)"
    ],
    "negative_indicators": [
      "out->memref.size originates from REE and later copied to REE-visible buffer on next line",
      "origin of params is REE-visible (caller-provided)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The sink at line 1659 is a generator of random into TA-private memory (non-sensitive by default) with bounded count; no insufficient sanitizer or tainted secret reaches REE on this same line, so it is not applicable as a vulnerability under the given rules.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "entry_ck_generate_random",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated random from TA-private buffer into caller-provided out->memref.buffer (REE-visible); random is public by default but this is a structural disclosure path.",
      "code_excerpt": "TEE_MemMove(data, buffer, count);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 316,
      "function": "entry_ck_generate_random",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Binding of callee parameter 'params' to caller-provided TEE_Param array (shared/REE-visible origin); alias of shared buffer passed into helper.",
      "code_excerpt": "rc = entry_ck_generate_random(client, ptypes, params); // params binding"
    }
  ]
}
フロー #185: TA_InvokeCommandEntryPoint -> entry_ck_generate_random -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_generate_randomTEE_MemMove

実行時間: 38.07秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1660

パラメータインデックス: 0

解析結果

安全判定理由: Copy transfers non-sensitive random data and effective bounds/allocation checks ensure copy_len <= out->memref.size, preventing overflow or disclosure of TA-private secrets.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_generate_random at lines [1660]:
-- Call #1 at line 1660 --
1658:
1659: TEE_GenerateRandom(buffer, count);
1660: >>> TEE_MemMove(data, buffer, count);
1661:
1662: data += count;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

// Call at line 1660:
1655:
1656: while (left) { 1657: size_t count = MIN(left, buffer_size); 1658: 1659: TEE_GenerateRandom(buffer, count); 1660: >>> TEE_MemMove(data, buffer, count); 1661: 1662: data += count; 1663: left -= count; 1664: }
1665:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest (data)",
      "src (buffer)",
      "len (count)"
    ],
    "propagation": [
      {
        "lhs": "dest <- data (out->memref.buffer)",
        "rhs": "data = out->memref.buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1653"
      },
      {
        "lhs": "src <- buffer",
        "rhs": "buffer = TEE_Malloc(buffer_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1649-1651"
      },
      {
        "lhs": "len <- count",
        "rhs": "count = MIN(left, buffer_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1657"
      },
      {
        "lhs": "dest[0..count-1]",
        "rhs": "TEE_MemMove(data, buffer, count) copies src->dest",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1660"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of callee dest parameter to caller-provided out->memref.buffer (shared/REE-visible); alias of shared buffer passed into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count); // dest = data (out->memref.buffer)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding of callee src parameter to TA-allocated buffer (TEE_Malloc) which is TA-private; records origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=buffer_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(data, buffer, count); // src = buffer (TEE_Malloc)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1660,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies TA-generated random bytes from TA-private buffer into caller-provided (REE-visible) buffer via TEE_MemMove.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:random",
          "size_triplet:copy_len=count,src_sz=buffer_size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(buffer, count); TEE_MemMove(data, buffer, count);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [1660]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [1660] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      1660
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 1660,
      "function": "entry_ck_generate_random",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies TA-generated random (treated as public) from a TA-allocated buffer into caller-provided out->memref.buffer; copy_len is bounded by MIN(left, buffer_size) and buffer_size = MIN(out->memref.size, RNG_CHUNK_SIZE), and param checks reject null buffer with non-zero size.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Copy transfers non-sensitive random data and effective bounds/allocation checks ensure copy_len <= out->memref.size, preventing overflow or disclosure of TA-private secrets.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_generate_random:1630-1631",
      "evidence": "checks ptypes == expected TEE_PARAM_TYPES"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_generate_random:1642-1646",
      "evidence": "rejects non-zero size with null buffer and returns OK for zero size"
    },
    {
      "type": "range_check",
      "location": "entry_ck_generate_random:1648",
      "evidence": "buffer_size = MIN(out->memref.size, RNG_CHUNK_SIZE)"
    },
    {
      "type": "allocation_check",
      "location": "entry_ck_generate_random:1649-1651",
      "evidence": "checks TEE_Malloc result and returns on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "validated for null when size non-zero and used only up to out->memref.size",
      "evidence": "pkcs11_token.c:1642-1646,1653-1654"
    },
    {
      "arg": "buffer (TEE_Malloc)",
      "why_safe": "allocated with buffer_size and checked for NULL before use",
      "evidence": "pkcs11_token.c:1648-1651"
    }
  ],
  "residual_risks": [
    "If caller treats returned random as a secret (e.g., seed/key) higher sensitivity would apply; current code treats random as public."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit param type check (ptypes == expected)",
      "null-buffer check for non-zero size",
      "bounded buffer_size using MIN with out->memref.size",
      "allocation check for TA buffer"
    ],
    "negative_indicators": [
      "out->memref.size provenance is REE-provided (tainted) though checked for null; no explicit upper bound on out->memref.size beyond RNG_CHUNK_SIZE applied to TA buffer size"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks and size limiting prevent overflow; data is random (policy-non-sensitive) so no unencrypted_output promotion applies.",
  "structural_risks": []
}
フロー #186: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_token_initializeupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 79.82秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: Memory-safety protections (snprintf return checked) and TA-private destination prevent a buffer-overflow or direct data leak at this line; remaining concerns are structural (authorization, persistent storage protections).

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_initialize at lines [908, 953, 1082, 1164, 1175, 1183, 1223, 1234, 1242]:
-- Call #1 at line 908 --
906: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
907:
908: >>> update_persistent_db(token);
909:
910: return PKCS11_CKR_PIN_INCORRECT;
-- Call #2 at line 953 --
951: PKCS11_CKFT_USER_PIN_TO_BE_CHANGED);
952:
953: >>> update_persistent_db(token);
954:
955:
-- Call #3 at line 1082 --
1080: token->db_main->flags |= flags_set;
1081:
1082: >>> update_persistent_db(token);
1083:
1084: return PKCS11_CKR_OK;
-- Call #4 at line 1164 --
1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
1163:
1164: >>> update_persistent_db(token);
1165:
1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED)
-- Call #5 at line 1175 --
1173: token->db_main->so_pin_count = 0;
1174:
1175: >>> update_persistent_db(token);
1176: }
1177:
-- Call #6 at line 1183 --
1181: PKCS11_CKFT_SO_PIN_FINAL_TRY);
1182:
1183: >>> update_persistent_db(token);
1184: }
1185:
-- Call #7 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #8 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #9 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) (writes)",
        "rhs": "token->db_main",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 908,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: callee parameter 'token' is alias of caller's token (originates from TA but influenced by REE-derived token_id).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Writes TA-held token->db_main into persistent storage via TEE_WriteObjectData; persistent destination region and protection are not proven here.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "return value",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed into open_db_file is alias of caller's token (originates from TA state possibly influenced by REE-derived token_id).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=sizeof(*token),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "rule": "other",
      "why": "Uses file name derived from token to open persistent object (TEE_OpenPersistentObject); persistent destination protection and filename contents not proven.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n / name",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "get_token_id(token)",
        "rhs": "token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks snprintf return n < 0 or (size_t)n >= size and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer in caller (open_db_file) is provided to callee and filled based on token-derived id; token originated from TA state influenced by REE-provided token_id.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=sizeof(file)"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Formats persistent filename into provided buffer using token-derived id; filename contents and resulting persistent object name depend on token value.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=sizeof(\"token.db.%u\") + digits(get_token_id(token)),dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "name",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "get_token_id(token)",
        "rhs": "token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Writes formatted token-derived identifier into caller buffer 'name'; buffer origin and resulting filename depend on token value.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "Formatted write targets a TA-private buffer derived from token; snprintf return is checked (n < 0 || (size_t)n >= size) which prevents overflow/overflow-like truncation at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token_id originally derived from REE-controlled params (via serialargs in entry_ck_token_initialize)",
      "propagation_path": [
        "params[0].memref.buffer (REE) -> serialargs -> token_id @ pkcs11_token.c:840",
        "token_id -> get_token(token_id) -> token (TA) @ pkcs11_token.c:859",
        "get_token_id(token) -> snprintf name buffer @ persistent_token.c:30"
      ],
      "sink": "snprintf writes into TA-private buffer 'name'"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls params[0] to set token_id to a chosen value",
        "Attacker can influence token state referenced by token_id"
      ],
      "attack_scenario": "Crafted REE input could influence which token is selected and thus the filename generated, but snprintf is bounded and targets TA-private storage so direct memory corruption is mitigated.",
      "impact": "Low: may control persistent filename selection leading to resource or logic confusion; no direct buffer overflow at this site."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "open_db_file:48|persistent_token.c",
        "recommendation": "Validate token ownership/authorization before opening/writing persistent object to avoid unauthorized filename-driven access."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "snprintf return value is checked immediately after the call (bounds check present)",
        "destination is TA-private buffer (not directly REE-visible)"
      ],
      "negative_indicators": [
        "token selection originates from REE-provided params earlier in the call chain",
        "persistent object open/write protections/provenance not fully evidenced here"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety protections (snprintf return checked) and TA-private destination prevent a buffer-overflow or direct data leak at this line; remaining concerns are structural (authorization, persistent storage protections).",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf at line 30 is bounded and checked; it writes into a TA-private buffer, so no overflow or direct unencrypted REE output occurs at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33|/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_token_initialize:835-836|/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "evidence": "ptypes compared against expected parameter types"
    }
  ],
  "argument_safety": [
    {
      "arg": "name (buffer)",
      "why_safe": "size parameter is enforced by snprintf and its return is validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "derived from token (TA-held) after token lookup; token_id originates from REE but affects selection logic rather than direct unbounded write here",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:840,859"
    }
  ],
  "residual_risks": [
    "line 30: token_id is REE-influenced which controls filename selection; persistent storage access/authorization not proven here"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit snprintf return check",
      "Destination buffer is TA-private"
    ],
    "negative_indicators": [
      "Upstream REE-controlled token_id influences filename",
      "Persistent object protections not shown in this fragment"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Given the explicit bounds check on snprintf's return and the TA-private destination buffer, the line is not vulnerable to buffer overflow or unencrypted REE exposure; remaining concerns are structural and addressed elsewhere.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer (pin) using pin_size from REE without further containment proof.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes TA-held token->db_main into persistent storage via TEE_WriteObjectData; persistent destination protection is not proven here.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "why": "Uses filename derived from token to open persistent object; persistent destination protection and filename contents not fully proven.",
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}
フロー #187: TA_InvokeCommandEntryPoint -> entry_ck_init_pin -> set_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_init_pinset_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 119.94秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

安全判定理由: The snprintf call at line 30 is protected by an immediate bounds check on its return value; data involved is TA-private (token id → filename), not REE-sensitive output to REE.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (12 メッセージ)

関数: set_pin
プロンプト 中間 (set_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_init_pin at lines [1128, 1306, 1319]:
-- Call #1 at line 1128 --
1126: IMSG("PKCS11 session %"PRIu32": init PIN", session->handle);
1127:
1128: >>> return set_pin(session, pin, pin_size, PKCS11_CKU_USER);
1129: }
1130:
-- Call #2 at line 1306 --
1304: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle);
1305:
1306: >>> return set_pin(session, pin, pin_size, PKCS11_CKU_SO);
1307: }
1308:
-- Call #3 at line 1319 --
1317: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle);
1318:
1319: >>> return set_pin(session, pin, pin_size, PKCS11_CKU_USER);
1320: }
1321:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

972: static enum pkcs11_rc set_pin(struct pkcs11_session *session,
973: uint8_t *new_pin, size_t new_pin_size,
974: enum pkcs11_user_type user_type)
975: { 976: struct ck_token *token = session->token; 977: enum pkcs11_rc rc = PKCS11_CKR_OK; 978: uint32_t flags_clear = 0; 979: uint32_t flags_set = 0; 980: 981: if (token->db_main->flags & PKCS11_CKFT_WRITE_PROTECTED) 982: return PKCS11_CKR_TOKEN_WRITE_PROTECTED; 983: 984: if (!pkcs11_session_is_read_write(session)) 985: return PKCS11_CKR_SESSION_READ_ONLY; 986: 987: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 988: (token->db_main->flags & 989: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH)) { 990: rc = setup_identity_auth_from_pin(token, user_type, 991: new_pin, new_pin_size); 992: if (rc == PKCS11_CKR_OK) { 993: goto update_db; 994: } else if (rc == PKCS11_CKR_PIN_INVALID && 995: !(token->db_main->flags & 996: PKCS11_CKFT_USER_PIN_INITIALIZED)) { 997: 1002: 1003: 1004: flags_clear |= 1005: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1006: } else { 1007: return rc; 1008: } 1009: } else if ((user_type == PKCS11_CKU_SO) && !new_pin && 1010: IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1011: !(token->db_main->flags & 1012: PKCS11_CKFT_USER_PIN_INITIALIZED)) { 1013: 1017: 1018: 1022: token->db_main->flags |= 1023: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1024: 1025: 1029: rc = setup_identity_auth_from_pin(token, PKCS11_CKU_SO, 1030: NULL, 0); 1031: if (rc) { 1032: 1036: token->db_main->flags &= 1037: ~PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1038: return rc; 1039: } 1040: 1041: goto update_db; 1042: } 1043: 1044: if (new_pin_size < PKCS11_TOKEN_PIN_SIZE_MIN || 1045: new_pin_size > PKCS11_TOKEN_PIN_SIZE_MAX) 1046: return PKCS11_CKR_PIN_LEN_RANGE; 1047: 1048: switch (user_type) { 1049: case PKCS11_CKU_SO: 1050: rc = hash_pin(user_type, new_pin, new_pin_size, 1051: &token->db_main->so_pin_salt, 1052: token->db_main->so_pin_hash); 1053: if (rc) 1054: return rc; 1055: token->db_main->so_pin_count = 0; 1056: flags_clear |= PKCS11_CKFT_SO_PIN_COUNT_LOW | 1057: PKCS11_CKFT_SO_PIN_FINAL_TRY | 1058: PKCS11_CKFT_SO_PIN_LOCKED | 1059: PKCS11_CKFT_SO_PIN_TO_BE_CHANGED; 1060: break; 1061: case PKCS11_CKU_USER: 1062: rc = hash_pin(user_type, new_pin, new_pin_size, 1063: &token->db_main->user_pin_salt, 1064: token->db_main->user_pin_hash); 1065: if (rc) 1066: return rc; 1067: token->db_main->user_pin_count = 0; 1068: flags_clear |= PKCS11_CKFT_USER_PIN_COUNT_LOW | 1069: PKCS11_CKFT_USER_PIN_FINAL_TRY | 1070: PKCS11_CKFT_USER_PIN_LOCKED | 1071: PKCS11_CKFT_USER_PIN_TO_BE_CHANGED; 1072: flags_set |= PKCS11_CKFT_USER_PIN_INITIALIZED; 1073: break; 1074: default: 1075: return PKCS11_CKR_FUNCTION_FAILED; 1076: } 1077: 1078: update_db: 1079: token->db_main->flags &= ~flags_clear; 1080: token->db_main->flags |= flags_set; 1081: 1082: update_persistent_db(token); 1083: 1084: return PKCS11_CKR_OK; 1085: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_pin",
    "tainted_vars": [
      "session",
      "new_pin",
      "new_pin_size",
      "token",
      "token->db_main",
      "token->db_main->user_pin_hash",
      "token->db_main->so_pin_hash"
    ],
    "propagation": [
      {
        "lhs": "token",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:976"
      },
      {
        "lhs": "new_pin_size",
        "rhs": "caller-provided new_pin_size (from serialargs pin_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:972: call sites"
      },
      {
        "lhs": "new_pin",
        "rhs": "caller-provided pin pointer (from serialargs_get_ptr)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:972: call sites"
      },
      {
        "lhs": "token->db_main->user_pin_hash / so_pin_hash",
        "rhs": "hash_pin(..., new_pin, new_pin_size, ..., out_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1050-1065"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:981-986",
        "evidence": "Checks write protection and session read/write before modifying DB"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1044-1046",
        "evidence": "Checks new_pin_size against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1128,
      "function": "set_pin",
      "rule": "other",
      "why": "Caller-provided params.memref.buffer (pin) is forwarded into set_pin as new_pin; alias of REE-visible buffer recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1306,
      "function": "set_pin",
      "rule": "other",
      "why": "Caller-provided pin pointer passed to set_pin for SO; origin is REE memref buffer so binding is recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_SO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1319,
      "function": "set_pin",
      "rule": "other",
      "why": "Caller-provided pin pointer passed to set_pin for USER; alias of shared buffer recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "set_pin",
      "rule": "other",
      "why": "new_pin (from REE) is passed into hash_pin which writes into token DB hashes (TEE-private); alias recorded and sensitivity is credential.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=new_pin_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_pin at lines [1082, 1164, 1175, 1183, 1223, 1234, 1242]:
-- Call #1 at line 1082 --
1080: token->db_main->flags |= flags_set;
1081:
1082: >>> update_persistent_db(token);
1083:
1084: return PKCS11_CKR_OK;
-- Call #2 at line 1164 --
1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
1163:
1164: >>> update_persistent_db(token);
1165:
1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED)
-- Call #3 at line 1175 --
1173: token->db_main->so_pin_count = 0;
1174:
1175: >>> update_persistent_db(token);
1176: }
1177:
-- Call #4 at line 1183 --
1181: PKCS11_CKFT_SO_PIN_FINAL_TRY);
1182:
1183: >>> update_persistent_db(token);
1184: }
1185:
-- Call #5 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #6 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #7 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) result",
        "rhs": "token->db_main (may contain hashes derived from REE-supplied PIN)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "open_db_file result checked and TEE_Panic on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "TEE_WriteObjectData result checked and TEE_Panic on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1082,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token (session->token) passed into update_persistent_db; binding of TEE-private DB object recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1164,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after modifying db_main flags; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1175,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after resetting pin count; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1183,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after modifying flags; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1223,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after setting USER_PIN_LOCKED; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1234,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after resetting user pin count; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1242,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "token passed into update_persistent_db after modifying flags; binding recorded (TEE-private persistent write).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "TEE_WriteObjectData writes token->db_main (which may include REE-derived credential hashes) to persistent storage; recorded as TEE-private persistent write of sensitive data.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "local stack buffer initialized at declaration",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41"
      },
      {
        "lhs": "res",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(..., file, sizeof(file), ..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "Checks get_db_file_name result and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 38,
      "function": "open_db_file",
      "rule": "other",
      "why": "token pointer passed from caller (session->token) is forwarded into open_db_file; origin is TEE-private DB structure, record alias binding.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "static TEE_Result open_db_file(struct ck_token *token, TEE_ObjectHandle *out_hdl)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 38,
      "function": "open_db_file",
      "rule": "other",
      "why": "out_hdl (address of db_hdl) is caller stack storage passed to open_db_file to receive a persistent object handle; record binding of output handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "code_excerpt": "static TEE_Result open_db_file(struct ck_token *token, TEE_ObjectHandle *out_hdl)"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "snprintf(...) writes formatted token id into name buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks snprintf return n < 0 or (size_t)n >= size and returns TEE_ERROR_SECURITY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "token pointer (used in get_token_id) originates from caller TEE-private structure; bind recorded for provenance of generated filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "name buffer (caller-provided) is written via snprintf; record binding of callee 'name' to caller buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "format",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token)) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "written by snprintf with formatted get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Caller checks snprintf return n < 0 || (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Caller-provided buffer 'name' is written by snprintf; binding recorded (buffer is TA-local stack provided by caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes TA-private filename into caller buffer but its return value is immediately checked for overflow (n < 0 || (size_t)n >= size) so caller enforces bounds.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "The snprintf call at line 30 is protected by an immediate bounds check on its return value; data involved is TA-private (token id → filename), not REE-sensitive output to REE.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "caller supplies buffer and size which are checked against snprintf return",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "value is derived from TEE-private token structure (not REE) and used only to form internal filename",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "None relevant to snprintf at line 30; other flows carry REE-provided PIN material into TEE-private storage and persistent writes which are structural risks listed below"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Immediate snprintf return-value bounds check",
      "filename derived from TEE-private token id (no REE-sensitive disclosure)"
    ],
    "negative_indicators": [
      "name buffer provenance is caller-supplied TA stack but validated by caller",
      "dst_sz field for persistent write later is unknown"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks around snprintf prevent overflow; data is TA-private and not being sent to REE here, so no vulnerability at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided REE-visible memref.buffer via TEE_MemMove; destination is shared/REE-visible.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "PIN buffer from REE params is forwarded into set_pin (credential material) and used within TA.",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "TEE_WriteObjectData persists token->db_main (may include hashes derived from REE-supplied PIN) to persistent storage.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #188: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> set_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_set_pinset_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 150.94秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

安全判定理由: snprintf usage is followed by a robust bounds check (n < 0 || (size_t)n >= size) and the output remains TEE-private, so no direct vulnerable sink is present at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (12 メッセージ)

関数: set_pin
プロンプト 中間 (set_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “set_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_set_pin at lines [1306, 1319]:
-- Call #1 at line 1306 --
1304: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle);
1305:
1306: >>> return set_pin(session, pin, pin_size, PKCS11_CKU_SO);
1307: }
1308:
-- Call #2 at line 1319 --
1317: IMSG("PKCS11 session %"PRIu32": set PIN", session->handle);
1318:
1319: >>> return set_pin(session, pin, pin_size, PKCS11_CKU_USER);
1320: }
1321:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

972: static enum pkcs11_rc set_pin(struct pkcs11_session *session,
973: uint8_t *new_pin, size_t new_pin_size,
974: enum pkcs11_user_type user_type)
975: { 976: struct ck_token *token = session->token; 977: enum pkcs11_rc rc = PKCS11_CKR_OK; 978: uint32_t flags_clear = 0; 979: uint32_t flags_set = 0; 980: 981: if (token->db_main->flags & PKCS11_CKFT_WRITE_PROTECTED) 982: return PKCS11_CKR_TOKEN_WRITE_PROTECTED; 983: 984: if (!pkcs11_session_is_read_write(session)) 985: return PKCS11_CKR_SESSION_READ_ONLY; 986: 987: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 988: (token->db_main->flags & 989: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH)) { 990: rc = setup_identity_auth_from_pin(token, user_type, 991: new_pin, new_pin_size); 992: if (rc == PKCS11_CKR_OK) { 993: goto update_db; 994: } else if (rc == PKCS11_CKR_PIN_INVALID && 995: !(token->db_main->flags & 996: PKCS11_CKFT_USER_PIN_INITIALIZED)) { 997: 1002: 1003: 1004: flags_clear |= 1005: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1006: } else { 1007: return rc; 1008: } 1009: } else if ((user_type == PKCS11_CKU_SO) && !new_pin && 1010: IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1011: !(token->db_main->flags & 1012: PKCS11_CKFT_USER_PIN_INITIALIZED)) { 1013: 1017: 1018: 1022: token->db_main->flags |= 1023: PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1024: 1025: 1029: rc = setup_identity_auth_from_pin(token, PKCS11_CKU_SO, 1030: NULL, 0); 1031: if (rc) { 1032: 1036: token->db_main->flags &= 1037: ~PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH; 1038: return rc; 1039: } 1040: 1041: goto update_db; 1042: } 1043: 1044: if (new_pin_size < PKCS11_TOKEN_PIN_SIZE_MIN || 1045: new_pin_size > PKCS11_TOKEN_PIN_SIZE_MAX) 1046: return PKCS11_CKR_PIN_LEN_RANGE; 1047: 1048: switch (user_type) { 1049: case PKCS11_CKU_SO: 1050: rc = hash_pin(user_type, new_pin, new_pin_size, 1051: &token->db_main->so_pin_salt, 1052: token->db_main->so_pin_hash); 1053: if (rc) 1054: return rc; 1055: token->db_main->so_pin_count = 0; 1056: flags_clear |= PKCS11_CKFT_SO_PIN_COUNT_LOW | 1057: PKCS11_CKFT_SO_PIN_FINAL_TRY | 1058: PKCS11_CKFT_SO_PIN_LOCKED | 1059: PKCS11_CKFT_SO_PIN_TO_BE_CHANGED; 1060: break; 1061: case PKCS11_CKU_USER: 1062: rc = hash_pin(user_type, new_pin, new_pin_size, 1063: &token->db_main->user_pin_salt, 1064: token->db_main->user_pin_hash); 1065: if (rc) 1066: return rc; 1067: token->db_main->user_pin_count = 0; 1068: flags_clear |= PKCS11_CKFT_USER_PIN_COUNT_LOW | 1069: PKCS11_CKFT_USER_PIN_FINAL_TRY | 1070: PKCS11_CKFT_USER_PIN_LOCKED | 1071: PKCS11_CKFT_USER_PIN_TO_BE_CHANGED; 1072: flags_set |= PKCS11_CKFT_USER_PIN_INITIALIZED; 1073: break; 1074: default: 1075: return PKCS11_CKR_FUNCTION_FAILED; 1076: } 1077: 1078: update_db: 1079: token->db_main->flags &= ~flags_clear; 1080: token->db_main->flags |= flags_set; 1081: 1082: update_persistent_db(token); 1083: 1084: return PKCS11_CKR_OK; 1085: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "set_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"set_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (set_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "set_pin",
    "tainted_vars": [
      "session",
      "new_pin",
      "new_pin_size",
      "token",
      "token->db_main",
      "user_type"
    ],
    "propagation": [
      {
        "lhs": "token",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:976"
      },
      {
        "lhs": "new_pin_size (validated)",
        "rhs": "new_pin_size passed from caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1044-1046"
      },
      {
        "lhs": "pin hash output",
        "rhs": "hash_pin(user_type, new_pin, new_pin_size, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1050-1064"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1044-1046",
        "evidence": "new_pin_size checked against PKCS11_TOKEN_PIN_SIZE_MIN and PKCS11_TOKEN_PIN_SIZE_MAX"
      },
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:984-986",
        "evidence": "session read-write checked"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1306,
      "function": "set_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument aliases TA session object derived in caller; origin is TA-private session structure.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_SO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1319,
      "function": "set_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument aliases TA session object derived in caller; origin is TA-private session structure.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1306,
      "function": "set_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument aliases buffer read from caller params (shared/REE-visible), so new_pin originates from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=params[0].memref.size,dst_sz=new_pin_size"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_SO);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1319,
      "function": "set_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument aliases buffer read from caller params (shared/REE-visible), so new_pin originates from REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=params[0].memref.size,dst_sz=new_pin_size"
        ]
      },
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "set_pin",
      "rule": "other",
      "why": "hash_pin is invoked on new_pin/new_pin_size (caller-controlled PIN); PIN is sensitive credential data being stored into token DB.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=new_pin_size,dst_sz=sizeof(token->db_main->*_pin_hash)"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->*_pin_salt, token->db_main->*_pin_hash);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_pin at lines [1082, 1164, 1175, 1183, 1223, 1234, 1242]:
-- Call #1 at line 1082 --
1080: token->db_main->flags |= flags_set;
1081:
1082: >>> update_persistent_db(token);
1083:
1084: return PKCS11_CKR_OK;
-- Call #2 at line 1164 --
1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
1163:
1164: >>> update_persistent_db(token);
1165:
1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED)
-- Call #3 at line 1175 --
1173: token->db_main->so_pin_count = 0;
1174:
1175: >>> update_persistent_db(token);
1176: }
1177:
-- Call #4 at line 1183 --
1181: PKCS11_CKFT_SO_PIN_FINAL_TRY);
1182:
1183: >>> update_persistent_db(token);
1184: }
1185:
-- Call #5 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #6 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #7 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "TEE_WriteObjectData(...) input",
        "rhs": "token->db_main",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-65"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "open_db_file result checked and TEE_Panic on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:66-69",
        "evidence": "TEE_WriteObjectData result checked and TEE_Panic on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1082,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from caller's session->token (TA-private) and is passed into persistent write helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Writes token->db_main (contains PIN hashes/flags) to persistent storage via TEE_WriteObjectData; sensitive credential material persisted.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46",
        "evidence": "file buffer sized by PERSISTENT_OBJECT_ID_LEN and get_db_file_name result is checked (res) before use"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1082,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from caller's session->token (TA-private) and is passed into open_db_file.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "weak_input_validation",
      "why": "Filename buffer 'file' is derived from token via get_db_file_name; if token-derived fields are tainted, the file name may be attacker-controlled without further validation.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'out_hdl' (caller-provided address) is written by open_db_file via TEE_OpenPersistentObject; origin is caller-local handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted string using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks snprintf return n for negative or >= size and returns error to prevent overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' parameter is passed from caller's token (session->token) and may contain fields influencing filename generation.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer is caller-provided 'file' local and is written into by this function (out buffer origin is caller).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "weak_input_validation",
      "why": "Filename is formed using token-derived get_token_id(token); if token fields are attacker-controlled this affects the persistent filename despite length check.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "get_token_id(token)",
      "n",
      "token"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted output containing get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks snprintf return value n for negative or >= size and returns error to prevent overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'token' argument (used by get_token_id) originates from caller and influences formatted output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer is caller-provided and will be written by snprintf (out buffer aliasing).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Formatted filename depends on token-derived value; although length is checked, semantic validation of token influence on filename is absent.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=sizeof(\"token.db.%u\")+digits,get_token_id(token),dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "Formatted filename uses token-derived id but snprintf return 'n' is checked against buffer 'size' immediately after, preventing overflow; no REE-visible write occurs on this line.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "snprintf usage is followed by a robust bounds check (n < 0 || (size_t)n >= size) and the output remains TEE-private, so no direct vulnerable sink is present at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "token",
      "why_safe": "token is TA-private and not directly written to REE here",
      "evidence": "persistent_token.c:30"
    },
    {
      "arg": "name",
      "why_safe": "name buffer length is validated via snprintf return check",
      "evidence": "persistent_token.c:30-33"
    }
  ],
  "residual_risks": [
    "Filename semantics depend on token-derived get_token_id(token); although length-checked, attacker-controlled token fields could influence filename selection (structural risk across call chain)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Immediate bounds check on snprintf return value",
      "No REE-visible buffer is written on this line"
    ],
    "negative_indicators": [
      "Filename content derived from token id (token provenance not fully analyzed here)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety check prevents overflow at the snprintf call and the produced filename remains in TEE-private memory; therefore the line is not a vulnerable sink per policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "why": "Formatted filename depends on token-derived value; semantic validation of token influence on filename is absent though length is checked.",
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "why": "Filename buffer 'file' is derived from token via get_db_file_name; if token-derived fields are tainted the persistent object name may be attacker-influenced.",
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes token->db_main (contains PIN hashes/flags) to persistent storage; sensitive credential material is persisted.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE-provided buffer to obtain pointers into that buffer via serialargs_get_ptr without stronger semantic validation.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    }
  ]
}
フロー #189: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> check_so_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_set_pincheck_so_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 155.28秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: The formatted write is protected by an immediate and effective bounds check on snprintf's return value; therefore the sink at this line is not vulnerable, though the data source is token-derived and warrants structural attention.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: check_so_pin
プロンプト 中間 (check_so_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_so_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_set_pin at lines [1300, 1468]:
-- Call #1 at line 1300 --
1298: return PKCS11_CKR_GENERAL_ERROR;
1299:
1300: >>> rc = check_so_pin(session, old_pin, old_pin_size);
1301: if (rc)
1302: return rc;
-- Call #2 at line 1468 --
1466: */
1467:
1468: >>> rc = check_so_pin(session, pin, pin_size);
1469: if (!rc)
1470: session_login_so(session);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1131: static enum pkcs11_rc check_so_pin(struct pkcs11_session *session,
1132: uint8_t *pin, size_t pin_size)
1133: { 1134: struct ck_token *token = session->token; 1135: enum pkcs11_rc rc = PKCS11_CKR_OK; 1136: 1137: assert(token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED); 1138: 1139: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1140: token->db_main->flags & PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH) 1141: return verify_identity_auth(token, PKCS11_CKU_SO); 1142: 1143: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED) 1144: return PKCS11_CKR_PIN_LOCKED; 1145: 1146: rc = verify_pin(PKCS11_CKU_SO, pin, pin_size, 1147: token->db_main->so_pin_salt, 1148: token->db_main->so_pin_hash); 1149: if (rc) { 1150: unsigned int pin_count = 0; 1151: 1152: if (rc != PKCS11_CKR_PIN_INCORRECT) 1153: return rc; 1154: 1155: token->db_main->flags |= PKCS11_CKFT_SO_PIN_COUNT_LOW; 1156: token->db_main->so_pin_count++; 1157: 1158: pin_count = token->db_main->so_pin_count; 1159: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX - 1) 1160: token->db_main->flags |= PKCS11_CKFT_SO_PIN_FINAL_TRY; 1161: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX) 1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED; 1163: 1164: update_persistent_db(token); 1165: 1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED) 1167: return PKCS11_CKR_PIN_LOCKED; 1168: 1169: return PKCS11_CKR_PIN_INCORRECT; 1170: } 1171: 1172: if (token->db_main->so_pin_count) { 1173: token->db_main->so_pin_count = 0; 1174: 1175: update_persistent_db(token); 1176: } 1177: 1178: if (token->db_main->flags & (PKCS11_CKFT_SO_PIN_COUNT_LOW | 1179: PKCS11_CKFT_SO_PIN_FINAL_TRY)) { 1180: token->db_main->flags &= ~(PKCS11_CKFT_SO_PIN_COUNT_LOW | 1181: PKCS11_CKFT_SO_PIN_FINAL_TRY); 1182: 1183: update_persistent_db(token); 1184: } 1185: 1186: return PKCS11_CKR_OK; 1187: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_so_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_so_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_so_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_so_pin",
    "tainted_vars": [
      "session",
      "pin",
      "pin_size",
      "token",
      "rc",
      "token->db_main->so_pin_salt",
      "token->db_main->so_pin_hash",
      "token->db_main->so_pin_count",
      "token->db_main->flags"
    ],
    "propagation": [
      {
        "lhs": "token",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1134"
      },
      {
        "lhs": "rc",
        "rhs": "verify_pin(PKCS11_CKU_SO, pin, pin_size, token->db_main->so_pin_salt, token->db_main->so_pin_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1146-1148"
      },
      {
        "lhs": "token->db_main->so_pin_count",
        "rhs": "increment on failed verify_pin",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1155-1162"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1137",
        "evidence": "assert(token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED)"
      },
      {
        "kind": "state_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1143-1144",
        "evidence": "checks PKCS11_CKFT_SO_PIN_LOCKED before verify"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1300,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument is alias of session obtained earlier in entry_ck_set_pin (TA-private origin from session store).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1300,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'old_pin' argument aliases data parsed from caller-provided memref (shared/REE-visible buffer).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1300,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'old_pin_size' is derived from REE-provided fields and influences internal checks.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1468,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument (from entry path) passed to check_so_pin again; same aliasing risk noted earlier.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1468,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument aliases caller-provided buffer (shared/REE-visible) containing new PIN.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1146,
      "function": "check_so_pin",
      "rule": "weak_input_validation",
      "why": "Passes pin and pin_size (sourced from REE) into verify_pin without additional length/content validation here.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=unknown,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = verify_pin(PKCS11_CKU_SO, pin, pin_size, token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_so_pin at lines [1164, 1175, 1183, 1223, 1234, 1242]:
-- Call #1 at line 1164 --
1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
1163:
1164: >>> update_persistent_db(token);
1165:
1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED)
-- Call #2 at line 1175 --
1173: token->db_main->so_pin_count = 0;
1174:
1175: >>> update_persistent_db(token);
1176: }
1177:
-- Call #3 at line 1183 --
1181: PKCS11_CKFT_SO_PIN_FINAL_TRY);
1182:
1183: >>> update_persistent_db(token);
1184: }
1185:
-- Call #4 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #5 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #6 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "res",
      "db_hdl",
      "token->db_main",
      "token->db_main->flags",
      "token->db_main->so_pin_count",
      "token->db_main->user_pin_count",
      "token->db_main->so_pin_hash",
      "token->db_main->so_pin_salt"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "checks res from open_db_file and panics on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "checks res from TEE_WriteObjectData and panics on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Writes token->db_main (contains PIN-related fields) to persistent storage via TEE_WriteObjectData; sensitive credential material may be persisted.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1164,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' argument aliases token from check_so_pin (TA-private structure) passed into updater.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1175,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' (modified by PIN count reset) passed to persistent update; origin is TA token state influenced by REE-supplied PIN verification.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1183,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed after adjusting flags for final try; persisted state may reflect REE-driven failures.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1223,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' argument (after user PIN lock) passed to updater; ensures persistent lock state is written.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1234,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed after resetting user_pin_count; persisted state includes counters influenced by REE inputs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1242,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed after marking final try for user PIN; persisting this flag reflects attacker-controllable outcomes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "file",
      "res",
      "out_hdl"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "checks res from get_db_file_name and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "rule": "other",
      "why": "Uses token-derived filename buffer to open a persistent object; filename may be influenced by token state which can reflect REE-controlled inputs.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument aliases token from update_persistent_db; origin is TA token state influenced by earlier REE-driven operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from caller into open_db_file; token may contain fields influenced by REE (e.g., PIN counters).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from higher-level flow and is forwarded to open_db_file for persistent access.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed where persistent DB is opened for read/write; persisted state derived from token may reflect attacker-controllable inputs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks n < 0 or (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Filename is derived from token id (get_token_id(token)); token-controlled fields may influence filename selection.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' argument aliases token passed from open_db_file; origin is TA token state.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer passed is a local buffer in open_db_file (TEE-private) used to hold filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' argument at this call originates from higher-level flow and is forwarded here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer at this call is provided by caller (TEE-private) to receive filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "format args (get_token_id(token))"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "caller checks n < 0 || (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer provided by caller is written into by snprintf; the buffer originates in caller (TEE-private) and holds filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Uses token-derived value (get_token_id(token)) in formatted filename; token-controlled state may influence output without stronger validation.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=sizeof(unsigned),dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "Formatted write uses token-derived value into a caller-provided buffer but the caller checks snprintf return (n) immediately for overflow/negativity and returns an error, providing an effective bounds sanitizer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token state (get_token_id(token)) potentially influenced by prior REE-driven operations",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs -> old_pin/pin @ pkcs11_token.c:1267,1273-1285",
        "token state -> get_db_file_name @ persistent_token.c:30",
        "name buffer written by snprintf @ persistent_token.c:30"
      ],
      "sink": "snprintf writing filename into local buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker can influence token id or token state that affects get_token_id(token)",
        "No other flaws in get_db_file_name's caller"
      ],
      "attack_scenario": "Malformed or malicious token id could cause unexpected filename, but snprintf return is checked to prevent overflow.",
      "impact": "Potential metadata manipulation of persistent filename; does not directly cause memory corruption due to immediate bounds check."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_db_file_name:30-33",
        "recommendation": "Ensure get_token_id(token) is from a constrained domain and document invariant; consider explicit range check on token id before formatting."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct call to snprintf with formatted token id at persistent_token.c:30",
        "Upstream data (token) originates from TA state influenced by prior REE inputs"
      ],
      "negative_indicators": [
        "Immediate bounds check of snprintf return value at persistent_token.c:32-33 returning error on overflow",
        "name buffer is a local TEE-private buffer in caller"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The formatted write is protected by an immediate and effective bounds check on snprintf's return value; therefore the sink at this line is not vulnerable, though the data source is token-derived and warrants structural attention.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf's return value is checked immediately and the caller returns on overflow, preventing buffer overflow at this call-site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "caller-provided local buffer of size 'size' and snprintf return is validated",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "formatted into filename with bounds check afterwards; token id origin should be constrained",
      "evidence": "persistent_token.c:30 and persistent_token.c:32-33"
    }
  ],
  "residual_risks": [
    "Persistent DB writes of token->db_main (contains PIN-related fields) to storage via TEE_WriteObjectData may persist sensitive credentials (persistent_token.c:64) — sanitizer present only as error handling, not encryption",
    "serialargs_get_ptr uses sizes from REE-provided buffer to obtain pointers into that buffer (pkcs11_token.c:1281,1285) — relies on serialargs validation but remains a structural risk"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Immediate bounds check of snprintf return",
      "No direct copy of secrets into REE at this line"
    ],
    "negative_indicators": [
      "Token-derived data influences filename and token state is influenced by earlier REE inputs",
      "Persistent storage write of token->db_main elsewhere"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety sanitizer (snprintf return check) prevents overflow at this site; remaining issues are structural (sensitive state persisted later) and do not make this sink call itself vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes token->db_main (contains PIN-related fields) to persistent storage; sensitive credential material may be persisted.",
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE-provided buffer to obtain pointers into that buffer without stronger semantic validation.",
      "code_excerpt": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1146,
      "function": "check_so_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=unknown,dst_sz=pin_size"
        ]
      },
      "why": "Passes pin and pin_size (sourced from REE) into verify_pin without additional length/content validation here.",
      "code_excerpt": "verify_pin(PKCS11_CKU_SO, pin, pin_size, token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    }
  ]
}
フロー #190: TA_InvokeCommandEntryPoint -> entry_ck_login -> check_so_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_logincheck_so_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 161.84秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: Bounds/truncation check after snprintf prevents overflow at this site and the buffer is TEE-private; therefore the call is not a vulnerable sink per policy, though filename influence on persistent access is a structural concern.

信頼度: MEDIUM

LLM対話履歴 (12 メッセージ)

関数: check_so_pin
プロンプト 中間 (check_so_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_so_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_login at lines [1468]:
-- Call #1 at line 1468 --
1466: */
1467:
1468: >>> rc = check_so_pin(session, pin, pin_size);
1469: if (!rc)
1470: session_login_so(session);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1131: static enum pkcs11_rc check_so_pin(struct pkcs11_session *session,
1132: uint8_t *pin, size_t pin_size)
1133: { 1134: struct ck_token *token = session->token; 1135: enum pkcs11_rc rc = PKCS11_CKR_OK; 1136: 1137: assert(token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED); 1138: 1139: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1140: token->db_main->flags & PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH) 1141: return verify_identity_auth(token, PKCS11_CKU_SO); 1142: 1143: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED) 1144: return PKCS11_CKR_PIN_LOCKED; 1145: 1146: rc = verify_pin(PKCS11_CKU_SO, pin, pin_size, 1147: token->db_main->so_pin_salt, 1148: token->db_main->so_pin_hash); 1149: if (rc) { 1150: unsigned int pin_count = 0; 1151: 1152: if (rc != PKCS11_CKR_PIN_INCORRECT) 1153: return rc; 1154: 1155: token->db_main->flags |= PKCS11_CKFT_SO_PIN_COUNT_LOW; 1156: token->db_main->so_pin_count++; 1157: 1158: pin_count = token->db_main->so_pin_count; 1159: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX - 1) 1160: token->db_main->flags |= PKCS11_CKFT_SO_PIN_FINAL_TRY; 1161: if (pin_count == PKCS11_TOKEN_SO_PIN_COUNT_MAX) 1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED; 1163: 1164: update_persistent_db(token); 1165: 1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED) 1167: return PKCS11_CKR_PIN_LOCKED; 1168: 1169: return PKCS11_CKR_PIN_INCORRECT; 1170: } 1171: 1172: if (token->db_main->so_pin_count) { 1173: token->db_main->so_pin_count = 0; 1174: 1175: update_persistent_db(token); 1176: } 1177: 1178: if (token->db_main->flags & (PKCS11_CKFT_SO_PIN_COUNT_LOW | 1179: PKCS11_CKFT_SO_PIN_FINAL_TRY)) { 1180: token->db_main->flags &= ~(PKCS11_CKFT_SO_PIN_COUNT_LOW | 1181: PKCS11_CKFT_SO_PIN_FINAL_TRY); 1182: 1183: update_persistent_db(token); 1184: } 1185: 1186: return PKCS11_CKR_OK; 1187: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_so_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_so_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_so_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_so_pin",
    "tainted_vars": [
      "session",
      "pin",
      "pin_size",
      "token",
      "token->db_main",
      "token->db_main->so_pin_salt",
      "token->db_main->so_pin_hash",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "token",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1134"
      },
      {
        "lhs": "rc",
        "rhs": "verify_pin(PKCS11_CKU_SO, pin, pin_size, token->db_main->so_pin_salt, token->db_main->so_pin_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1146-1148"
      },
      {
        "lhs": "token->db_main->so_pin_count",
        "rhs": "token->db_main->so_pin_count + 1 (on PIN incorrect)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1155-1162"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1137-1141",
        "evidence": "assert(token->db_main->flags & PKCS11_CKFT_TOKEN_INITIALIZED) and early return for protected auth path"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1468,
      "function": "check_so_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument is alias of session handle derived earlier from REE-supplied serial args; origin region unclear but influences token DB access.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1468,
      "function": "check_so_pin",
      "rule": "weak_input_validation",
      "why": "Call-site binding: 'pin' is alias of REE-provided buffer extracted earlier (pin_size-controlled); pin is a credential and used directly in verify_pin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1468,
      "function": "check_so_pin",
      "rule": "weak_input_validation",
      "why": "Call-site binding: 'pin_size' is REE-controlled and drives verify_pin length; insufficient additional validation of range/limits here.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(pin_size),src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = check_so_pin(session, pin, pin_size);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_so_pin at lines [1164, 1175, 1183, 1223, 1234, 1242]:
-- Call #1 at line 1164 --
1162: token->db_main->flags |= PKCS11_CKFT_SO_PIN_LOCKED;
1163:
1164: >>> update_persistent_db(token);
1165:
1166: if (token->db_main->flags & PKCS11_CKFT_SO_PIN_LOCKED)
-- Call #2 at line 1175 --
1173: token->db_main->so_pin_count = 0;
1174:
1175: >>> update_persistent_db(token);
1176: }
1177:
-- Call #3 at line 1183 --
1181: PKCS11_CKFT_SO_PIN_FINAL_TRY);
1182:
1183: >>> update_persistent_db(token);
1184: }
1185:
-- Call #4 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #5 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #6 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      },
      {
        "lhs": "persistent storage contents",
        "rhs": "token->db_main (written)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1164",
      "line": 1164,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1175",
      "line": 1175,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1183",
      "line": 1183,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1223",
      "line": 1223,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1234",
      "line": 1234,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1242",
      "line": 1242,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (derived earlier from REE-controlled session handle); origin influences persisted DB content.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Writes the token->db_main structure to persistent storage via TEE_WriteObjectData; persisted data contains credential-related fields (PIN counters/hashes).",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "zero-initialized stack buffer then filled by get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), flags, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46",
        "evidence": "file buffer sized by PERSISTENT_OBJECT_ID_LEN and length passed to get_db_file_name; no visible runtime check of returned name length here"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1164",
      "line": 1164,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from session->token earlier (influenced by REE-derived session handle); origin influences DB filename resolution.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/check_so_pin_callsite:1164",
      "line": 1164,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'out_hdl' argument is &db_hdl (local handle); callee will populate a TEE object handle (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' originates from session->token (path earlier) and is passed to open_db_file; influences persistent DB access.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl is &db_hdl (local) and will receive a persistent object handle from callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed may be influenced by earlier REE-provided session state; used to compute DB filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl (&db_hdl) receives object handle; callee controls persistent object access.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument influences which persistent object file is opened; token derived from session state influenced by REE inputs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl (&db_hdl) is TEE-private; callee will populate handle used for subsequent TEE storage operations.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "open_db_file",
      "rule": "weak_input_validation",
      "why": "get_db_file_name populates filename from token-derived data without visible robust validation here; crafted names could affect persistent object selection.",
      "sink_function": "get_db_file_name",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=unknown,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "rule": "other",
      "why": "Opens persistent object using filename buffer; if filename is attacker-influenced, this affects which persistent object is accessed/created.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n",
      "get_token_id(token)"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted string containing get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from higher-level session state possibly influenced by REE; token-derived id is used to form filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer provided by caller will receive token-derived filename; influences which persistent object is accessed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "weak_input_validation",
      "why": "Filename derived from token id (potentially attacker-influenced) then checked via snprintf return value; relies on correct semantics of snprintf and check.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=unknown,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "get_token_id(token)"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted output containing get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Formatted filename includes token-derived id (potentially attacker-influenced); relies on snprintf return check but filename choice can affect persistent object selection.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer is a local caller-provided buffer (stack) that will receive formatted output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'size' argument controls snprintf bounds; it's a caller-provided size parameter (influence on copy length).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token))"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "not_applicable",
      "why": "snprintf writes a filename into a TEE-local buffer and its return value is checked for truncation; no direct REE-visible output or overflow is evident at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token/session state (influenced by REE-derived session handle)",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init/ctrlargs -> serialargs_get_ptr -> pin @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1414,1428",
        "session->token -> token passed to get_db_file_name @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      ],
      "sink": "snprintf writes formatted token-derived filename into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker can influence session handle or token id delivered to get_db_file_name"
      ],
      "attack_scenario": "Attacker crafts token id resulting in a particular filename; this may affect which persistent object is opened later but does not directly cause buffer overflow or leak to REE at this line.",
      "impact": "Potential control over which persistent object is accessed; no immediate memory corruption or REE-visible plaintext leak from this call alone."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_db_file_name:30-33",
        "recommendation": "Ensure token id is within expected numeric range and that filename semantics cannot be abused to access unintended persistent objects."
      },
      {
        "type": "access_control",
        "location": "open_db_file:48-51",
        "recommendation": "Validate and enforce that resolved persistent filenames map to allowed token storage locations and access rights."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "snprintf return value is checked for truncation (n < 0 || (size_t)n >= size)",
        "filename remains in TEE-private memory and is not directly returned to REE at this call"
      ],
      "negative_indicators": [
        "token-derived id originates from session state that ultimately came from REE-influenced inputs (unknown provenance)",
        "filename choice can influence later persistent storage operations"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Bounds/truncation check after snprintf prevents overflow at this site and the buffer is TEE-private; therefore the call is not a vulnerable sink per policy, though filename influence on persistent access is a structural concern.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf's return is checked for truncation and the output is TEE-local; no evidence of overflow or REE-visible sensitive output at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
    }
  ],
  "argument_safety": [
    {
      "arg": "token",
      "why_safe": "used to compute filename but sanitized length ensures no buffer overflow here",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "name",
      "why_safe": "caller-provided buffer size is respected by snprintf and checked",
      "evidence": "persistent_token.c:30-33"
    }
  ],
  "residual_risks": [
    "Filename derived from token id can influence which persistent object is opened later (see open_db_file/TEE_OpenPersistentObject) — potential access-control issue."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit snprintf return/value check",
      "no direct write to REE-visible memory at this call"
    ],
    "negative_indicators": [
      "upstream token/session provenance depends on REE-controlled inputs (unknown)",
      "subsequent use of filename in persistent storage operations could have impact"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety checks at the snprintf call are effective; the call does not produce REE-visible output or sensitive leakage by itself. Structural risk (weak_input_validation) remains for filename influencing persistent storage and for upstream REE-derived inputs."
}
フロー #191: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> check_user_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_set_pincheck_user_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 143.98秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: Bounds-checking of snprintf result prevents buffer overflow and the written data remains TA-private; therefore the line is not vulnerable.

信頼度: HIGH

LLM対話履歴 (12 メッセージ)

関数: check_user_pin
プロンプト 中間 (check_user_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_user_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_set_pin at lines [1313, 1487]:
-- Call #1 at line 1313 --
1311: return PKCS11_CKR_GENERAL_ERROR;
1312:
1313: >>> rc = check_user_pin(session, old_pin, old_pin_size);
1314: if (rc)
1315: return rc;
-- Call #2 at line 1487 --
1485: */
1486:
1487: >>> rc = check_user_pin(session, pin, pin_size);
1488: if (!rc)
1489: session_login_user(session);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1189: static enum pkcs11_rc check_user_pin(struct pkcs11_session *session,
1190: uint8_t *pin, size_t pin_size)
1191: { 1192: struct ck_token *token = session->token; 1193: enum pkcs11_rc rc = PKCS11_CKR_OK; 1194: 1195: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1196: token->db_main->flags & PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH) 1197: return verify_identity_auth(token, PKCS11_CKU_USER); 1198: 1199: if (!token->db_main->user_pin_salt) 1200: return PKCS11_CKR_USER_PIN_NOT_INITIALIZED; 1201: 1202: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED) 1203: return PKCS11_CKR_PIN_LOCKED; 1204: 1205: rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, 1206: token->db_main->user_pin_salt, 1207: token->db_main->user_pin_hash); 1208: if (rc) { 1209: unsigned int pin_count = 0; 1210: 1211: if (rc != PKCS11_CKR_PIN_INCORRECT) 1212: return rc; 1213: 1214: token->db_main->flags |= PKCS11_CKFT_USER_PIN_COUNT_LOW; 1215: token->db_main->user_pin_count++; 1216: 1217: pin_count = token->db_main->user_pin_count; 1218: if (pin_count == PKCS11_TOKEN_USER_PIN_COUNT_MAX - 1) 1219: token->db_main->flags |= PKCS11_CKFT_USER_PIN_FINAL_TRY; 1220: if (pin_count == PKCS11_TOKEN_USER_PIN_COUNT_MAX) 1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED; 1222: 1223: update_persistent_db(token); 1224: 1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED) 1226: return PKCS11_CKR_PIN_LOCKED; 1227: 1228: return PKCS11_CKR_PIN_INCORRECT; 1229: } 1230: 1231: if (token->db_main->user_pin_count) { 1232: token->db_main->user_pin_count = 0; 1233: 1234: update_persistent_db(token); 1235: } 1236: 1237: if (token->db_main->flags & (PKCS11_CKFT_USER_PIN_COUNT_LOW | 1238: PKCS11_CKFT_USER_PIN_FINAL_TRY)) { 1239: token->db_main->flags &= ~(PKCS11_CKFT_USER_PIN_COUNT_LOW | 1240: PKCS11_CKFT_USER_PIN_FINAL_TRY); 1241: 1242: update_persistent_db(token); 1243: } 1244: 1245: return PKCS11_CKR_OK; 1246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_user_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_user_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_user_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_user_pin",
    "tainted_vars": [
      "session",
      "pin",
      "pin_size",
      "token->db_main->user_pin_salt",
      "token->db_main->user_pin_hash"
    ],
    "propagation": [
      {
        "lhs": "rc",
        "rhs": "verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1205-1207"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1199-1201",
        "evidence": "check that user_pin_salt exists before proceeding"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1313,
      "function": "check_user_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument originates from caller-provided buffer (old_pin) obtained from serialargs; it's REE-originated credential data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "code_excerpt": "rc = check_user_pin(session, old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1487,
      "function": "check_user_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument originates from caller-provided buffer (pin) used for login; REE-originated credential passed into TA helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = check_user_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1205,
      "function": "check_user_pin",
      "rule": "weak_input_validation",
      "why": "Uses REE-provided pin and pin_size directly in verify_pin (auth check) with limited semantic validation of secret contents.",
      "sink_function": "verify_pin",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_user_pin at lines [1223, 1234, 1242]:
-- Call #1 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #2 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #3 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "open_db_file result checked and TEE_Panic on failure"
      },
      {
        "kind": "write_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "TEE_WriteObjectData result checked and TEE_Panic on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1223,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed originates from session->token (TA-private persistent state) and is written to persistent storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1234,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' (TA-private DB state) passed to updater after modifying user_pin_count; persistent write persists TA-private credential-related state.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1242,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed after clearing transient flags; updater writes entire db_main struct to persistent storage (may include credential-related fields).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name result checked and returned on failure"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51",
        "evidence": "TEE_OpenPersistentObject return propagated to caller for handling"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from update_persistent_db at line 59; origin is session->token (TA-private state) used to derive file name.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=sizeof(*token),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl (&db_hdl) is an output handle written by open_db_file; caller receives persistent object handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from caller at line 377; used to construct DB filename and open persistent object.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=sizeof(*token),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl (&db_hdl) will receive persistent object handle from TEE_OpenPersistentObject.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' provided at line 441 is used to build path/name into local file buffer for opening persistent storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=unknown,dst_sz=sizeof(file)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl parameter is an address-of local db handle that will be initialized by the persistent open call.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: caller at line 598 passes 'token' for DB access; token contents influence filename and persistent object opened.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(file),src_sz=unknown,dst_sz=sizeof(file)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: out_hdl (&db_hdl) will be set by TEE_OpenPersistentObject and returned to caller for subsequent writes/reads.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "snprintf write using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks n < 0 || (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from open_db_file; used to derive DB filename via get_token_id(token).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' (file buffer) is caller-provided stack buffer written by snprintf to form persistent filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from caller at line 662 influences filename generation (get_token_id).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' (file buffer) at this call is a local buffer that will receive the formatted filename; size is enforced by snprintf check.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "get_token_id(token)",
      "token"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "snprintf writes formatted filename into name using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks n < 0 || (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer is caller-provided and is written by snprintf; stack buffer receives generated filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: get_token_id(token) reads 'token' (TA-private) to produce filename component used by snprintf.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(formatted component),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf output is bounded by provided size and subsequently checked (n < 0 || (size_t)n >= size) preventing overflow; data written is a TA-private filename component, not REE-visible.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token (TA-private)",
      "propagation_path": [
        "token -> get_token_id(token) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30",
        "get_db_file_name: snprintf(name, size, ...) @ ...:30",
        "open_db_file: TEE_OpenPersistentObject(...) uses filename @ ...:48-51"
      ],
      "sink": "snprintf writing into caller-provided name buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker must control 'token' inside TA (unlikely from REE) or size argument to get_db_file_name"
      ],
      "attack_scenario": "Crafting a token id or size that causes snprintf to overflow name, but snprintf is bounded and checked so exploitation is blocked.",
      "impact": "If unsafely written, could cause memory corruption; here checks mitigate it."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_db_file_name:32-33",
        "recommendation": "Keep the explicit check and consider using safer APIs or assert size invariants at call-sites."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit snprintf result check (n < 0 || (size_t)n >= size)",
        "Filename component derived from TA-private token (not REE-visible)"
      ],
      "negative_indicators": [
        "None observed for this line"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Bounds-checking of snprintf result prevents buffer overflow and the written data remains TA-private; therefore the line is not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf call is properly bounded and checked; written data is TA-private and not copied to REE here.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name (file buffer)",
      "why_safe": "bounded by size and snprintf result is validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "token",
      "why_safe": "token is TA-private and used to form filename; not REE-originated here",
      "evidence": "get_token_id(token) usage @ persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "line 366: TEE_MemMove copies enum rc into REE-visible params[0].memref.buffer (structural risk previously noted) - not suppressed by this decision",
    "serialargs usage: sizes read from REE-provided buffer (old_pin_size/pin_size) used to obtain pointers into that buffer (structural risk)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit snprintf result bounds check",
      "Data written is a filename (TA-private) not directly exposed to REE at this call"
    ],
    "negative_indicators": [
      "None specific to this sink line"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks prevent overflow and the data is TA-private, so no information-disclosure or overflow vulnerability is present at snprintf line 30.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies TA-local rc into caller-provided REE-visible memref.buffer via TEE_MemMove; destination is shared.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE-provided buffer to obtain pointers into that buffer via serialargs_get_ptr without stronger semantic validation.",
      "code_excerpt": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1205,
      "function": "check_user_pin",
      "sink_function": "verify_pin",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=unknown"
        ]
      },
      "why": "Uses REE-provided pin and pin_size directly in verify_pin with limited semantic validation of secret contents.",
      "code_excerpt": "verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes TA-private persistent DB (may include credential-related fields) to persistent storage handle.",
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #192: TA_InvokeCommandEntryPoint -> entry_ck_login -> check_user_pin -> update_persistent_db -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_logincheck_user_pinupdate_persistent_dbopen_db_fileget_db_file_namesnprintf

実行時間: 137.47秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

安全判定理由: The formatted input originates from TA-private token state (not REE-tainted) and the caller performs a bounds/truncation check on snprintf's return value.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (12 メッセージ)

関数: check_user_pin
プロンプト 中間 (check_user_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “check_user_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_login at lines [1487]:
-- Call #1 at line 1487 --
1485: */
1486:
1487: >>> rc = check_user_pin(session, pin, pin_size);
1488: if (!rc)
1489: session_login_user(session);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

1189: static enum pkcs11_rc check_user_pin(struct pkcs11_session *session,
1190: uint8_t *pin, size_t pin_size)
1191: { 1192: struct ck_token *token = session->token; 1193: enum pkcs11_rc rc = PKCS11_CKR_OK; 1194: 1195: if (IS_ENABLED(CFG_PKCS11_TA_AUTH_TEE_IDENTITY) && 1196: token->db_main->flags & PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH) 1197: return verify_identity_auth(token, PKCS11_CKU_USER); 1198: 1199: if (!token->db_main->user_pin_salt) 1200: return PKCS11_CKR_USER_PIN_NOT_INITIALIZED; 1201: 1202: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED) 1203: return PKCS11_CKR_PIN_LOCKED; 1204: 1205: rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, 1206: token->db_main->user_pin_salt, 1207: token->db_main->user_pin_hash); 1208: if (rc) { 1209: unsigned int pin_count = 0; 1210: 1211: if (rc != PKCS11_CKR_PIN_INCORRECT) 1212: return rc; 1213: 1214: token->db_main->flags |= PKCS11_CKFT_USER_PIN_COUNT_LOW; 1215: token->db_main->user_pin_count++; 1216: 1217: pin_count = token->db_main->user_pin_count; 1218: if (pin_count == PKCS11_TOKEN_USER_PIN_COUNT_MAX - 1) 1219: token->db_main->flags |= PKCS11_CKFT_USER_PIN_FINAL_TRY; 1220: if (pin_count == PKCS11_TOKEN_USER_PIN_COUNT_MAX) 1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED; 1222: 1223: update_persistent_db(token); 1224: 1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED) 1226: return PKCS11_CKR_PIN_LOCKED; 1227: 1228: return PKCS11_CKR_PIN_INCORRECT; 1229: } 1230: 1231: if (token->db_main->user_pin_count) { 1232: token->db_main->user_pin_count = 0; 1233: 1234: update_persistent_db(token); 1235: } 1236: 1237: if (token->db_main->flags & (PKCS11_CKFT_USER_PIN_COUNT_LOW | 1238: PKCS11_CKFT_USER_PIN_FINAL_TRY)) { 1239: token->db_main->flags &= ~(PKCS11_CKFT_USER_PIN_COUNT_LOW | 1240: PKCS11_CKFT_USER_PIN_FINAL_TRY); 1241: 1242: update_persistent_db(token); 1243: } 1244: 1245: return PKCS11_CKR_OK; 1246: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "check_user_pin", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"check_user_pin", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (check_user_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "check_user_pin",
    "tainted_vars": [
      "session",
      "pin",
      "pin_size",
      "token",
      "token->db_main->user_pin_salt",
      "token->db_main->user_pin_hash",
      "token->db_main->flags",
      "token->db_main->user_pin_count"
    ],
    "propagation": [
      {
        "lhs": "token",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1192"
      },
      {
        "lhs": "rc",
        "rhs": "verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1205-1207"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1199-1201",
        "evidence": "if (!token->db_main->user_pin_salt) return PKCS11_CKR_USER_PIN_NOT_INITIALIZED"
      },
      {
        "kind": "state_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1202-1204",
        "evidence": "if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED) return PKCS11_CKR_PIN_LOCKED"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1487,
      "function": "check_user_pin",
      "rule": "other",
      "why": "Call-site binding: 'session' argument is alias of TA-internal session object created earlier (TA-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = check_user_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1487,
      "function": "check_user_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument is alias of buffer extracted from caller-provided memref (shared/REE-visible origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = check_user_pin(session, pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1205,
      "function": "check_user_pin",
      "rule": "weak_input_validation",
      "why": "Tainted pin pointer and pin_size from REE are passed into verify_pin without additional local bounds/content validation here.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: update_persistent_db
プロンプト 中間 (update_persistent_db)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_db” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_user_pin at lines [1223, 1234, 1242]:
-- Call #1 at line 1223 --
1221: token->db_main->flags |= PKCS11_CKFT_USER_PIN_LOCKED;
1222:
1223: >>> update_persistent_db(token);
1224:
1225: if (token->db_main->flags & PKCS11_CKFT_USER_PIN_LOCKED)
-- Call #2 at line 1234 --
1232: token->db_main->user_pin_count = 0;
1233:
1234: >>> update_persistent_db(token);
1235: }
1236:
-- Call #3 at line 1242 --
1240: PKCS11_CKFT_USER_PIN_FINAL_TRY);
1241:
1242: >>> update_persistent_db(token);
1243: }
1244:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

54: void update_persistent_db(struct ck_token *token)
55: { 56: TEE_Result res = TEE_ERROR_GENERIC; 57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 58: 59: res = open_db_file(token, &db_hdl); 60: if (res) { 61: EMSG("Failed to open token persistent db: %#"PRIx32, res); 62: TEE_Panic(0); 63: } 64: res = TEE_WriteObjectData(db_hdl, token->db_main, 65: sizeof(*token->db_main)); 66: if (res) { 67: EMSG("Failed to write to token persistent db: %#"PRIx32, res); 68: TEE_Panic(0); 69: } 70: 71: TEE_CloseObject(db_hdl); 72: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "update_persistent_db", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"update_persistent_db", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (update_persistent_db)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_db",
    "tainted_vars": [
      "token",
      "token->db_main",
      "db_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "if (res) { EMSG(...); TEE_Panic(0); } after open_db_file"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "if (res) { EMSG(...); TEE_Panic(0); } after TEE_WriteObjectData"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1223,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=sizeof(*token->db_main),dst_sz=?"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1234,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=sizeof(*token->db_main),dst_sz=?"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1242,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Call-site binding: 'token' passed to update_persistent_db is alias of TA-internal token (origin TA-private) from check_user_pin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=sizeof(*token->db_main),dst_sz=?"
        ]
      },
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "rule": "other",
      "why": "Writes TA-private token->db_main structure into a persistent TEE object via TEE_WriteObjectData; data includes sensitive token state.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [59, 377, 441, 598]:
-- Call #1 at line 59 --
57: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL;
58:
59: >>> res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
-- Call #2 at line 377 --
375:     		return PKCS11_CKR_DEVICE_MEMORY;
376:     
377: >>> 	res = open_db_file(token, &db_hdl);
378:     	if (res)
379:     		goto out;
-- Call #3 at line 441 --
439:     	       count * sizeof(TEE_UUID);
440:     
441: >>> 	res = open_db_file(token, &db_hdl);
442:     	if (res)
443:     		goto out;
-- Call #4 at line 598 --
596:     		goto error;
597:     
598: >>> 	res = open_db_file(token, &db_hdl);
599:     
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "if (res) return res after get_db_file_name"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' passed from caller (update_persistent_db) is TA-private; here used to derive persistent object name.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 59,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'out_hdl' argument is caller-local handle pointer (TEE_ObjectHandle *db_hdl) — a TA-managed handle destination.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "open_db_file",
      "rule": "other",
      "why": "Derived file name buffer (file) computed from token and then passed to TEE_OpenPersistentObject to open/write persistent storage.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "snprintf(... ) writes formatted token id into name buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from TA code (TA-private) and is used to derive the file name.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer passed is caller-local file[PERSISTENT_OBJECT_ID_LEN] (TA-private) receiving formatted output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=unknown,dst_sz=PERSISTENT_OBJECT_ID_LEN"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'token' argument here is TA-private and used to format the persistent DB file name.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Call-site binding: 'name' buffer passed at this call is a TA-local buffer receiving formatted output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "format",
      "get_token_id(token) -> formatted_arg",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted output from snprintf using token-derived id",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "caller checks if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Writes formatted token id into caller-provided buffer 'name' (TA-local) using token-derived value.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=formatted_len,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Relies on return value 'n' to detect truncation/overflow; correctness depends on caller's subsequent check.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=formatted_len,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "not_applicable",
      "why": "Input to snprintf (token id) is derived from TA-private token state, not REE-controlled data; caller checks snprintf return for truncation.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The formatted input originates from TA-private token state (not REE-tainted) and the caller performs a bounds/truncation check on snprintf's return value.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "Caller-provided buffer size is passed and checked for truncation after snprintf",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "Token id is sourced from TA-private token structure, not REE",
      "evidence": "persistent_token.c:30"
    }
  ],
  "residual_risks": [],
  "confidence_factors": {
    "positive_indicators": [
      "source is TA-private (token-derived)",
      "explicit truncation/bounds check on snprintf return"
    ],
    "negative_indicators": [
      "formatted length is dynamic (depends on token id) but checked",
      "no evidence of REE influence at this call site"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks are present and the data is TA-private, so snprintf at line 30 is not a REE-driven information disclosure or overflow vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided REE-visible buffer; structurally exposes TA state to REE (rc is non-sensitive here).",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1428,
      "function": "entry_ck_login",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "Pin pointer obtained from serialargs_get_ptr uses REE-controlled pin_size; content/format not validated here.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1205,
      "function": "check_user_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "Tainted pin and size passed into verify_pin without local additional validation in this function.",
      "code_excerpt": "rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes TA-private token state into persistent TEE object; structural sensitive persistence.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=PERSISTENT_OBJECT_ID_LEN,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "why": "Opens/creates persistent object using TA-derived file name; structural interaction with persistent storage.",
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl);"
    }
  ]
}
フロー #193: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> unregister_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_token_initializeunregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 119.85秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: The write is into a TA-local buffer with an immediate, effective length check; source and destination are TEE-private so this is not an information disclosure to REE and memory-safety is guarded.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: unregister_persistent_object
プロンプト 中間 (unregister_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “unregister_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_initialize at lines [960, 961]:
-- Call #1 at line 960 --
958:
959:
960: >>> if (unregister_persistent_object(token, obj->uuid) &&
961: unregister_persistent_object(token, obj->uuid))
962: TEE_Panic(0);
-- Call #2 at line 961 --
959:
960: if (unregister_persistent_object(token, obj->uuid) &&
961: >>> unregister_persistent_object(token, obj->uuid))
962: TEE_Panic(0);
963:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

353: enum pkcs11_rc unregister_persistent_object(struct ck_token *token,
354: TEE_UUID *uuid)
355: { 356: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 357: struct token_persistent_objs *ptr = NULL; 358: TEE_Result res = TEE_ERROR_GENERIC; 359: int count = 0; 360: int idx = 0; 361: 362: if (!uuid) 363: return PKCS11_CKR_OK; 364: 365: idx = get_persistent_obj_idx(token, uuid); 366: if (idx < 0) { 367: DMSG("Cannot unregister an invalid persistent object"); 368: return PKCS11_RV_NOT_FOUND; 369: } 370: 371: ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + 372: ((token->db_objs->count - 1) * sizeof(TEE_UUID)), 373: TEE_USER_MEM_HINT_NO_FILL_ZERO); 374: if (!ptr) 375: return PKCS11_CKR_DEVICE_MEMORY; 376: 377: res = open_db_file(token, &db_hdl); 378: if (res) 379: goto out; 380: 381: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 382: TEE_DATA_SEEK_SET); 383: if (res) { 384: DMSG("Failed to read database"); 385: goto out; 386: } 387: 388: TEE_MemMove(ptr, token->db_objs, 389: sizeof(struct token_persistent_objs) + 390: idx * sizeof(TEE_UUID)); 391: 392: ptr->count--; 393: count = ptr->count - idx; 394: 395: TEE_MemMove(&ptr->uuids[idx], 396: &token->db_objs->uuids[idx + 1], 397: count * sizeof(TEE_UUID)); 398: 399: res = TEE_WriteObjectData(db_hdl, ptr, 400: sizeof(struct token_persistent_objs) + 401: ptr->count * sizeof(TEE_UUID)); 402: if (res) 403: DMSG("Failed to update database"); 404: TEE_Free(token->db_objs); 405: token->db_objs = ptr; 406: ptr = NULL; 407: 408: out: 409: TEE_CloseObject(db_hdl); 410: TEE_Free(ptr); 411: 412: return tee2pkcs_error(res); 413: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "unregister_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"unregister_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (unregister_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "unregister_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "idx",
      "ptr",
      "db_hdl",
      "res",
      "count"
    ],
    "propagation": [
      {
        "lhs": "idx",
        "rhs": "get_persistent_obj_idx(token, uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-366"
      },
      {
        "lhs": "ptr (allocated buffer size)",
        "rhs": "sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-374"
      },
      {
        "lhs": "ptr contents",
        "rhs": "TEE_MemMove from token->db_objs with length sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-391"
      },
      {
        "lhs": "&ptr->uuids[idx]",
        "rhs": "&token->db_objs->uuids[idx + 1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "write to DB",
        "rhs": "TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399-401"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-369",
        "evidence": "if (!uuid) return; get_persistent_obj_idx validated (idx < 0 handled)"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375",
        "evidence": "TEE_Malloc checked for NULL and returns error if failed"
      },
      {
        "kind": "io_result_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:377-379",
        "evidence": "open_db_file result checked and goto out on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 960,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Call-site binding: 'token' argument is alias of TA-managed token structure passed into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 961,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Call-site binding: 'uuid' argument is alias of obj->uuid from token object list (TA-owned).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "unregister_persistent_object(token, obj->uuid))"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "rule": "weak_input_validation",
      "why": "Uses idx (from get_persistent_obj_idx) to compute copy lengths and offsets for TEE_MemMove/array shifts; if idx arithmetic is wrong it may miscompute sizes.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [377, 441, 598]:
-- Call #1 at line 377 --
375: return PKCS11_CKR_DEVICE_MEMORY;
376:
377: >>> res = open_db_file(token, &db_hdl);
378: if (res)
379: goto out;
-- Call #2 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #3 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "return value of TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name result checked and returned on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' parameter is alias of caller's token (TA-managed) passed into open_db_file.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: '&db_hdl' is caller-local TEE_ObjectHandle passed to receive object handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' parameter is alias of TA-managed token from caller at this site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: '&db_hdl' is caller-local handle passed for output.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: 'token' argument originates from caller context (TA-managed).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Call-site binding: '&db_hdl' passed to receive opened object handle (caller-local).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "open_db_file",
      "rule": "weak_input_validation",
      "why": "Filename 'file' is derived from token via get_db_file_name and then passed into TEE_OpenPersistentObject without additional validation of resulting path contents.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=sizeof(file)"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "name",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "n",
        "rhs": "return value of snprintf(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks n < 0 or (size_t)n >= size and returns error to avoid overflow/truncation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "'token' parameter is caller-provided TA-managed pointer passed into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "'name' argument is caller stack buffer 'file' passed to be written by snprintf.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "'token' parameter at this call-site originates from caller context and is passed into callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "'name' argument is caller buffer 'file' passed to be filled by snprintf at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "name (content)",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "n",
        "rhs": "return value of snprintf(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "formatted token id",
        "rhs": "get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "caller checks n < 0 || (size_t)n >= size and returns error to prevent overflow/truncation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Call-site binding: 'name' is caller buffer passed to snprintf and will be written into.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Formatted output length n depends on get_token_id(token) and size parameter; improper size could cause truncation if caller did not check return value.",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token))"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes into a TA-local buffer using TA-local token id; return value 'n' is checked for negative/overflow immediately after, preventing truncation/overflow to the caller-visible buffer.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "get_token_id(token) (TA-private)",
      "propagation_path": [
        "get_token_id(token) -> snprintf format arg @ persistent_token.c:30",
        "snprintf writes into caller buffer 'name' (TA stack) @ persistent_token.c:30"
      ],
      "sink": "snprintf(name, size, ...) @ persistent_token.c:30"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed/incorrect 'size' value passed to get_db_file_name (caller-controlled) AND caller fails to check snprintf return"
      ],
      "attack_scenario": "Not applicable because caller checks snprintf return 'n' and returns error on overflow, preventing exploitation.",
      "impact": "If sanitizer absent, possible buffer truncation or overflow leading to corruption; here mitigated."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_db_file_name:32-33",
        "recommendation": "Maintain the existing check and ensure all callers handle non-success return correctly."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Immediate check of snprintf return value (n < 0 || (size_t)n >= size) present",
        "Formatted input derived from TA-private token id (not REE)",
        "Destination buffer is TA-local"
      ],
      "negative_indicators": [
        "If callers ignored the return value, truncation could be propagated; reliance on callers to act"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The write is into a TA-local buffer with an immediate, effective length check; source and destination are TEE-private so this is not an information disclosure to REE and memory-safety is guarded.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf at line 30 is followed by an explicit bounds/overflow check and operates on TA-private data/buffer.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "caller-provided stack buffer 'file' is sized and snprintf return is validated",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "derived from TA-managed token (not REE) and used only in formatting",
      "evidence": "persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "If callers incorrectly ignore non-success return from get_db_file_name, truncated filenames could be used downstream",
    "Other structural risks exist elsewhere (e.g., shared mem copies) unrelated to snprintf line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit sanitizer immediately after snprintf",
      "All data involved appear TEE-private"
    ],
    "negative_indicators": [
      "Reliance on caller behavior for error handling in some call-sites (e.g., one call leads to TEE_Panic on error)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks are present and the call writes only to TEE-private storage using TA-local data; no REE-visible sensitive output or unchecked bounds exist at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); structural risk recorded though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer using pin_size from REE; containment not fully proven.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "why": "Uses idx from get_persistent_obj_idx to compute copy lengths and offsets for TEE_MemMove; incorrect idx arithmetic could miscompute sizes.",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "open_db_file",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=sizeof(file)"
        ]
      },
      "why": "Filename derived from token and passed to TEE_OpenPersistentObject without further validation of path contents beyond string formatting checks.",
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl);"
    }
  ]
}
フロー #194: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> destroy_object -> unregister_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_generate_key_pairdestroy_objectunregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 144.47秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

安全判定理由: The call is guarded by an immediate bounds check (n < 0 || (size_t)n >= size) and the data written is a non-sensitive filename derived from token id, so neither memory-safety nor sensitive-data exposure conditions are met.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (12 メッセージ)

関数: destroy_object
プロンプト 中間 (destroy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “destroy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_generate_key_pair at lines [568]:
-- Call #1 at line 568 --
566: if (!object)
567: TEE_Panic(0);
568: >>> destroy_object(session, object, false);
569: }
570: TEE_Free(priv_head);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

134: void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj,
135: bool session_only)
136: { 137: #ifdef DEBUG 138: trace_attributes("[destroy]", obj->attributes); 139: if (obj->uuid) 140: MSG_RAW("[destroy] obj uuid %pUl", (void *)obj->uuid); 141: #endif 142: 143: if (session_only) { 144: 145: handle_put(get_object_handle_db(session), 146: pkcs11_object2handle(obj, session)); 147: cleanup_volatile_obj_ref(obj); 148: 149: return; 150: } 151: 152: 153: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 154: assert(obj->uuid); 155: 156: if (unregister_persistent_object(session->token, obj->uuid) && 157: unregister_persistent_object(session->token, obj->uuid)) 158: TEE_Panic(0); 159: 160: handle_put(get_object_handle_db(session), 161: pkcs11_object2handle(obj, session)); 162: cleanup_persistent_object(obj, session->token); 163: 164: token_invalidate_object_handles(obj); 165: } else { 166: handle_put(get_object_handle_db(session), 167: pkcs11_object2handle(obj, session)); 168: cleanup_volatile_obj_ref(obj); 169: } 170: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "destroy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"destroy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (destroy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "destroy_object",
    "tainted_vars": [
      "session",
      "obj",
      "session_only",
      "obj->attributes",
      "obj->uuid",
      "session->token"
    ],
    "propagation": [
      {
        "lhs": "session",
        "rhs": "caller-provided session (from entry_generate_key_pair)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:568"
      },
      {
        "lhs": "obj",
        "rhs": "caller-provided object (from pkcs11_handle2object in caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:564-568"
      },
      {
        "lhs": "obj->uuid",
        "rhs": "field read to decide persistent cleanup and unregister calls",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:139-158"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:153-156",
        "evidence": "assert(obj->uuid) when PKCS11_CKA_TOKEN is set"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 568,
      "function": "destroy_object",
      "rule": "other",
      "why": "alias of TA-local session pointer passed into destroy_object from caller; session provenance internal to TA but originated from earlier REE-influenced flow",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_session*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(session, object, false);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 568,
      "function": "destroy_object",
      "rule": "other",
      "why": "alias of TA-local object pointer passed into destroy_object; object contains attributes/uuid used for persistent cleanup",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(session, object, false);"
    }
  ]
}

関数: unregister_persistent_object
プロンプト 中間 (unregister_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “unregister_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from destroy_object at lines [156, 157]:
-- Call #1 at line 156 --
154: assert(obj->uuid);
155:
156: >>> if (unregister_persistent_object(session->token, obj->uuid) &&
157: unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
-- Call #2 at line 157 --
155:
156: if (unregister_persistent_object(session->token, obj->uuid) &&
157: >>> unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
159:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

353: enum pkcs11_rc unregister_persistent_object(struct ck_token *token,
354: TEE_UUID *uuid)
355: { 356: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 357: struct token_persistent_objs *ptr = NULL; 358: TEE_Result res = TEE_ERROR_GENERIC; 359: int count = 0; 360: int idx = 0; 361: 362: if (!uuid) 363: return PKCS11_CKR_OK; 364: 365: idx = get_persistent_obj_idx(token, uuid); 366: if (idx < 0) { 367: DMSG("Cannot unregister an invalid persistent object"); 368: return PKCS11_RV_NOT_FOUND; 369: } 370: 371: ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + 372: ((token->db_objs->count - 1) * sizeof(TEE_UUID)), 373: TEE_USER_MEM_HINT_NO_FILL_ZERO); 374: if (!ptr) 375: return PKCS11_CKR_DEVICE_MEMORY; 376: 377: res = open_db_file(token, &db_hdl); 378: if (res) 379: goto out; 380: 381: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 382: TEE_DATA_SEEK_SET); 383: if (res) { 384: DMSG("Failed to read database"); 385: goto out; 386: } 387: 388: TEE_MemMove(ptr, token->db_objs, 389: sizeof(struct token_persistent_objs) + 390: idx * sizeof(TEE_UUID)); 391: 392: ptr->count--; 393: count = ptr->count - idx; 394: 395: TEE_MemMove(&ptr->uuids[idx], 396: &token->db_objs->uuids[idx + 1], 397: count * sizeof(TEE_UUID)); 398: 399: res = TEE_WriteObjectData(db_hdl, ptr, 400: sizeof(struct token_persistent_objs) + 401: ptr->count * sizeof(TEE_UUID)); 402: if (res) 403: DMSG("Failed to update database"); 404: TEE_Free(token->db_objs); 405: token->db_objs = ptr; 406: ptr = NULL; 407: 408: out: 409: TEE_CloseObject(db_hdl); 410: TEE_Free(ptr); 411: 412: return tee2pkcs_error(res); 413: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "unregister_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"unregister_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (unregister_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "unregister_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "res",
      "token->db_objs",
      "idx",
      "count"
    ],
    "propagation": [
      {
        "lhs": "idx",
        "rhs": "get_persistent_obj_idx(token, uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-373"
      },
      {
        "lhs": "res",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:377"
      },
      {
        "lhs": "ptr contents",
        "rhs": "TEE_MemMove from token->db_objs up to idx",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-390"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-364",
        "evidence": "if (!uuid) return PKCS11_CKR_OK"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "idx checked for < 0 and returns PKCS11_RV_NOT_FOUND"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "session->token (passed as 'token') is an alias of caller session field and may have provenance influenced by earlier REE inputs; binding callee param to this origin.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "unregister_persistent_object(session->token, obj->uuid)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "obj->uuid (passed as 'uuid') is an alias of object field used to index persistent DB; origin from TA object but validated only for non-NULL.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "unregister_persistent_object(session->token, obj->uuid)"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [377, 441, 598]:
-- Call #1 at line 377 --
375: return PKCS11_CKR_DEVICE_MEMORY;
376:
377: >>> res = open_db_file(token, &db_hdl);
378: if (res)
379: goto out;
-- Call #2 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #3 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name return value checked and early-return on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 38,
      "function": "open_db_file",
      "rule": "other",
      "why": "binding of caller's token pointer to callee param 'token'; origin is TA session->token and may have earlier REE-influenced provenance",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "static TEE_Result open_db_file(struct ck_token *token, TEE_ObjectHandle *out_hdl)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 38,
      "function": "open_db_file",
      "rule": "other",
      "why": "binding of caller's out handle pointer to callee param 'out_hdl'; caller-provided handle will be written by TEE_OpenPersistentObject",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(..., out_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "rule": "other",
      "why": "TEE_OpenPersistentObject may write persistent-object handle into caller-provided out_hdl which aliases caller storage (db_hdl)",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE|unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (buffer contents)",
        "rhs": "formatted string using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks n < 0 or (size_t)n >= size and returns error to avoid overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "caller-provided 'token' pointer is used to derive filename via get_token_id; token provenance comes from caller (session->token) and may be influenced upstream",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "writes formatted filename into caller-provided buffer 'name' with explicit size; buffer bounds are checked after snprintf but result-dependent",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "get_token_id(token) result"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (buffer contents)",
        "rhs": "formatted string written by snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks n < 0 || (size_t)n >= size and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "writes formatted filename into caller-provided buffer 'name' (TA buffer) using size parameter; buffer provenance is caller-controlled",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes a formatted filename into a TA-local buffer derived from token id; bounds are checked immediately after (n checked against size) and data is not sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call is guarded by an immediate bounds check (n < 0 || (size_t)n >= size) and the data written is a non-sensitive filename derived from token id, so neither memory-safety nor sensitive-data exposure conditions are met.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "caller-provided buffer is validated by size parameter checked against snprintf result",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "token id is used only to format a filename (non-sensitive)",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "None significant for this sink line; upstream structural risks exist where TA-generated handles/rc are copied to REE-visible buffers (TEE_MemMove) but not on this line"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Immediate bounds-check on snprintf result",
      "Formatted content is a filename (non-sensitive)",
      "No subsequent copy of sensitive TA-private secret from this buffer to REE observed"
    ],
    "negative_indicators": [
      "Buffer provenance is caller-supplied earlier in the chain (but treated as TA-private here)",
      "get_token_id(token) provenance depends on token which is derived from session"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and information-disclosure promotion rules are not triggered: bounds are enforced and data is non-sensitive, so line is not vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are considered non-sensitive",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(ptr)"
        ]
      },
      "why": "Copies persistent DB header and first part of UUID array into a freshly allocated buffer using a size derived from idx; idx is validated but buffer arithmetic should be reviewed",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    }
  ]
}
フロー #195: TA_InvokeCommandEntryPoint -> entry_ck_close_session -> close_ck_session -> destroy_object -> unregister_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_close_sessionclose_ck_sessiondestroy_objectunregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 185.68秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

安全判定理由: The snprintf call formats a TA-private token filename (no REE output) and is followed by an explicit bounds check that prevents truncation/overflow, so it does not meet criteria for vulnerable sink use.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (14 メッセージ)

関数: close_ck_session
プロンプト 中間 (close_ck_session)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “close_ck_session” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_close_session at lines [732, 772]:
-- Call #1 at line 732 --
730: return PKCS11_CKR_ARGUMENTS_BAD;
731:
732: >>> close_ck_session(session);
733:
734: return PKCS11_CKR_OK;
-- Call #2 at line 772 --
770: TAILQ_FOREACH_SAFE(session, &client->session_list, link, next)
771: if (session->token == token)
772: >>> close_ck_session(session);
773:
774: return PKCS11_CKR_OK;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

686: static void close_ck_session(struct pkcs11_session *session)
687: { 688: release_active_processing(session); 689: release_session_find_obj_context(session); 690: 691: 692: while (!LIST_EMPTY(&session->object_list)) 693: destroy_object(session, 694: LIST_FIRST(&session->object_list), true); 695: 696: TAILQ_REMOVE(&session->client->session_list, session, link); 697: handle_put(&session->client->session_handle_db, session->handle); 698: 699: session->token->session_count--; 700: if (pkcs11_session_is_read_write(session)) 701: session->token->rw_session_count--; 702: 703: DMSG("Close PKCS11 session %"PRIu32, session->handle); 704: 705: TEE_Free(session); 706: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "close_ck_session", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"close_ck_session", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (close_ck_session)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "close_ck_session",
    "tainted_vars": [
      "session",
      "session->client",
      "session->object_list",
      "session->handle",
      "session->token"
    ],
    "propagation": [
      {
        "lhs": "release_active_processing(session) (uses session)",
        "rhs": "session (caller-provided into close_ck_session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:688"
      },
      {
        "lhs": "while (!LIST_EMPTY(&session->object_list)) destroy_object(...)",
        "rhs": "session->object_list",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:692-694"
      },
      {
        "lhs": "TAILQ_REMOVE(&session->client->session_list, session, link)",
        "rhs": "session and session->client",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:696"
      },
      {
        "lhs": "handle_put(&session->client->session_handle_db, session->handle)",
        "rhs": "session->client and session->handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:697"
      },
      {
        "lhs": "session->token->session_count--",
        "rhs": "session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:699"
      },
      {
        "lhs": "TEE_Free(session)",
        "rhs": "session (freed)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:705"
      }
    ],
    "sanitizers": [
      {
        "kind": "list_empty_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:692",
        "evidence": "while (!LIST_EMPTY(&session->object_list)) prevents destroying from empty list"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 732,
      "function": "close_ck_session",
      "rule": "other",
      "why": "session pointer (from caller) is forwarded into close_ck_session; alias/binding of callee parameter to TA-private session structure.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "close_ck_session(session);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 772,
      "function": "close_ck_session",
      "rule": "other",
      "why": "session pointer from client session_list is passed to close_ck_session; binding of iterator-derived pointer into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "close_ck_session(session);"
    }
  ]
}

関数: destroy_object
プロンプト 中間 (destroy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “destroy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from close_ck_session at lines [693, 1372]:
-- Call #1 at line 693 --
691:
692: while (!LIST_EMPTY(&session->object_list))
693: >>> destroy_object(session,
694: LIST_FIRST(&session->object_list), true);
695:
-- Call #2 at line 1372 --
1370: LIST_FOREACH_SAFE(obj, &sess->object_list, link, tobj) { 1371: if (object_is_private(obj->attributes)) 1372: >>> destroy_object(sess, obj, true); 1373: }
1374:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

134: void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj,
135: bool session_only)
136: { 137: #ifdef DEBUG 138: trace_attributes("[destroy]", obj->attributes); 139: if (obj->uuid) 140: MSG_RAW("[destroy] obj uuid %pUl", (void *)obj->uuid); 141: #endif 142: 143: if (session_only) { 144: 145: handle_put(get_object_handle_db(session), 146: pkcs11_object2handle(obj, session)); 147: cleanup_volatile_obj_ref(obj); 148: 149: return; 150: } 151: 152: 153: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 154: assert(obj->uuid); 155: 156: if (unregister_persistent_object(session->token, obj->uuid) && 157: unregister_persistent_object(session->token, obj->uuid)) 158: TEE_Panic(0); 159: 160: handle_put(get_object_handle_db(session), 161: pkcs11_object2handle(obj, session)); 162: cleanup_persistent_object(obj, session->token); 163: 164: token_invalidate_object_handles(obj); 165: } else { 166: handle_put(get_object_handle_db(session), 167: pkcs11_object2handle(obj, session)); 168: cleanup_volatile_obj_ref(obj); 169: } 170: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "destroy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"destroy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (destroy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "destroy_object",
    "tainted_vars": [
      "session",
      "obj",
      "obj->attributes",
      "obj->uuid",
      "session_only"
    ],
    "propagation": [
      {
        "lhs": "obj->attributes",
        "rhs": "obj (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:138-141"
      },
      {
        "lhs": "handle_put(get_object_handle_db(session), pkcs11_object2handle(obj, session))",
        "rhs": "obj and session (caller-provided)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:145-146"
      },
      {
        "lhs": "cleanup_volatile_obj_ref(obj) or cleanup_persistent_object(obj, session->token)",
        "rhs": "obj",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:147,162,168"
      },
      {
        "lhs": "unregister_persistent_object(session->token, obj->uuid)",
        "rhs": "obj->uuid and session->token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:156-157"
      }
    ],
    "sanitizers": [
      {
        "kind": "early_return",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:143-149",
        "evidence": "if (session_only) returns after handle_put and cleanup_volatile_obj_ref"
      },
      {
        "kind": "assert",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:154",
        "evidence": "assert(obj->uuid) when object is persistent"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/close_ck_session (call site)",
      "line": 693,
      "function": "destroy_object",
      "rule": "other",
      "why": "obj pointer from session->object_list (TA-private) is passed into destroy_object; alias of internal object into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(session, LIST_FIRST(&session->object_list), true);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/close_ck_session (call site)",
      "line": 1372,
      "function": "destroy_object",
      "rule": "other",
      "why": "obj iterator-derived pointer from sess->object_list (TA-private) passed into destroy_object; binding of iterator element into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(sess, obj, true);"
    }
  ]
}

関数: unregister_persistent_object
プロンプト 中間 (unregister_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “unregister_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from destroy_object at lines [156, 157]:
-- Call #1 at line 156 --
154: assert(obj->uuid);
155:
156: >>> if (unregister_persistent_object(session->token, obj->uuid) &&
157: unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
-- Call #2 at line 157 --
155:
156: if (unregister_persistent_object(session->token, obj->uuid) &&
157: >>> unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
159:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

353: enum pkcs11_rc unregister_persistent_object(struct ck_token *token,
354: TEE_UUID *uuid)
355: { 356: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 357: struct token_persistent_objs *ptr = NULL; 358: TEE_Result res = TEE_ERROR_GENERIC; 359: int count = 0; 360: int idx = 0; 361: 362: if (!uuid) 363: return PKCS11_CKR_OK; 364: 365: idx = get_persistent_obj_idx(token, uuid); 366: if (idx < 0) { 367: DMSG("Cannot unregister an invalid persistent object"); 368: return PKCS11_RV_NOT_FOUND; 369: } 370: 371: ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + 372: ((token->db_objs->count - 1) * sizeof(TEE_UUID)), 373: TEE_USER_MEM_HINT_NO_FILL_ZERO); 374: if (!ptr) 375: return PKCS11_CKR_DEVICE_MEMORY; 376: 377: res = open_db_file(token, &db_hdl); 378: if (res) 379: goto out; 380: 381: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 382: TEE_DATA_SEEK_SET); 383: if (res) { 384: DMSG("Failed to read database"); 385: goto out; 386: } 387: 388: TEE_MemMove(ptr, token->db_objs, 389: sizeof(struct token_persistent_objs) + 390: idx * sizeof(TEE_UUID)); 391: 392: ptr->count--; 393: count = ptr->count - idx; 394: 395: TEE_MemMove(&ptr->uuids[idx], 396: &token->db_objs->uuids[idx + 1], 397: count * sizeof(TEE_UUID)); 398: 399: res = TEE_WriteObjectData(db_hdl, ptr, 400: sizeof(struct token_persistent_objs) + 401: ptr->count * sizeof(TEE_UUID)); 402: if (res) 403: DMSG("Failed to update database"); 404: TEE_Free(token->db_objs); 405: token->db_objs = ptr; 406: ptr = NULL; 407: 408: out: 409: TEE_CloseObject(db_hdl); 410: TEE_Free(ptr); 411: 412: return tee2pkcs_error(res); 413: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "unregister_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"unregister_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (unregister_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "unregister_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "res",
      "idx",
      "token->db_objs"
    ],
    "propagation": [
      {
        "lhs": "idx",
        "rhs": "get_persistent_obj_idx(token, uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-373"
      },
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:377"
      },
      {
        "lhs": "ptr (first region)",
        "rhs": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-390"
      },
      {
        "lhs": "ptr->uuids[idx]..",
        "rhs": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "TEE_WriteObjectData(db_hdl, ptr, sizeof(...)+ptr->count*sizeof(TEE_UUID))",
        "rhs": "writes ptr contents to persistent storage via db_hdl",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399-401"
      }
    ],
    "sanitizers": [
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-364",
        "evidence": "if (!uuid) return PKCS11_CKR_OK"
      },
      {
        "kind": "index_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "if (idx < 0) return PKCS11_RV_NOT_FOUND"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:374-375",
        "evidence": "if (!ptr) return PKCS11_CKR_DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/destroy_object (call site)",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "session->token (TA-private) passed as 'token' parameter into unregister_persistent_object; alias of internal token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/destroy_object (call site)",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "obj->uuid (object-internal UUID, TA-private) passed as 'uuid' parameter into unregister_persistent_object; alias of internal UUID pointer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Copies token->db_objs into locally allocated ptr based on idx-derived length; index and sizes depend on token->db_objs contents.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [377, 441, 598]:
-- Call #1 at line 377 --
375: return PKCS11_CKR_DEVICE_MEMORY;
376:
377: >>> res = open_db_file(token, &db_hdl);
378: if (res)
379: goto out;
-- Call #2 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #3 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "checks return of get_db_file_name and returns on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "token (caller-provided) passed into open_db_file; alias of caller token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "token (caller-provided) passed into open_db_file; alias of caller token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "token (caller-provided) passed into open_db_file; alias of caller token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "&db_hdl (address of local handle) passed as out_hdl into open_db_file; binding of caller stack slot into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (output buffer)",
        "rhs": "formatted string from get_token_id(token) via snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n and compares against size, returns error if truncated or negative"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "token (caller-provided) passed into get_db_file_name; alias of caller token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "file buffer (caller stack array) passed as 'name' into get_db_file_name; alias of local buffer into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "token (caller-provided) passed into get_db_file_name; alias of caller token structure into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "file buffer (caller stack array) passed as 'name' into get_db_file_name; alias of local buffer into helper.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "get_token_id(token) -> token"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (buffer contents)",
        "rhs": "formatted output of snprintf using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n and returns error if negative or truncated (n >= size)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "name buffer (caller-provided stack array) is passed as destination to snprintf; alias of caller buffer into formatting function.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c (call site)",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Formatting output via snprintf writes into caller buffer 'name'; output size depends on get_token_id(token) formatting and size parameter.",
      "sink_function": "snprintf",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "not_applicable",
      "why": "snprintf writes a formatted token filename into a TA-private buffer; input (token id) is TA-private/non-sensitive and an explicit bounds check on snprintf return is performed immediately after.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The snprintf call formats a TA-private token filename (no REE output) and is followed by an explicit bounds check that prevents truncation/overflow, so it does not meet criteria for vulnerable sink use.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
    }
  ],
  "argument_safety": [
    {
      "arg": "name (char[file])",
      "why_safe": "caller-provided TA-private buffer with immediate snprintf return check",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "token id is internal TA data (not marked sensitive) and used only in filename formatting",
      "evidence": "persistent_token.c:30"
    }
  ],
  "residual_risks": [],
  "confidence_factors": {
    "positive_indicators": [
      "explicit snprintf return-value check and size comparison",
      "formatted data remains TA-private (not copied to REE on same line)"
    ],
    "negative_indicators": [
      "file name later used to open persistent object (I/O) but that does not expose it to REE here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: no overflow/truncation due to immediate check; information-disclosure promotion conditions not met (destination not REE-visible nor sensitive), so call is not a vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "why": "Copies token->db_objs into local ptr using idx-derived length; sizes depend on token->db_objs contents.",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=token->db_objs->count*sizeof(TEE_UUID),dst_sz=ptr->count*sizeof(TEE_UUID)"
        ]
      },
      "why": "Shifts UUID array tail into new buffer based on computed count; index-derived sizes are data-dependent.",
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #196: TA_InvokeCommandEntryPoint -> entry_ck_close_all_sessions -> close_ck_session -> destroy_object -> unregister_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_ck_close_all_sessionsclose_ck_sessiondestroy_objectunregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 157.35秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: The sink formats TA-private data into a TA-private buffer and an explicit bounds check ensures no overflow; no tainted REE-origin input reaches this snprintf, so not vulnerable.

信頼度: HIGH

LLM対話履歴 (14 メッセージ)

関数: close_ck_session
プロンプト 中間 (close_ck_session)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “close_ck_session” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_close_all_sessions at lines [772]:
-- Call #1 at line 772 --
770: TAILQ_FOREACH_SAFE(session, &client->session_list, link, next)
771: if (session->token == token)
772: >>> close_ck_session(session);
773:
774: return PKCS11_CKR_OK;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c

686: static void close_ck_session(struct pkcs11_session *session)
687: { 688: release_active_processing(session); 689: release_session_find_obj_context(session); 690: 691: 692: while (!LIST_EMPTY(&session->object_list)) 693: destroy_object(session, 694: LIST_FIRST(&session->object_list), true); 695: 696: TAILQ_REMOVE(&session->client->session_list, session, link); 697: handle_put(&session->client->session_handle_db, session->handle); 698: 699: session->token->session_count--; 700: if (pkcs11_session_is_read_write(session)) 701: session->token->rw_session_count--; 702: 703: DMSG("Close PKCS11 session %"PRIu32, session->handle); 704: 705: TEE_Free(session); 706: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "close_ck_session", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"close_ck_session", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (close_ck_session)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "close_ck_session",
    "tainted_vars": [
      "session",
      "session->client",
      "session->object_list",
      "session->token",
      "session->handle"
    ],
    "propagation": [
      {
        "lhs": "session",
        "rhs": "iterated from &client->session_list in caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:770-772"
      },
      {
        "lhs": "session->token",
        "rhs": "session (field access)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:771,699-701"
      },
      {
        "lhs": "session->object_list element",
        "rhs": "LIST_FIRST(&session->object_list) passed to destroy_object",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:692-694"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 772,
      "function": "close_ck_session",
      "rule": "other",
      "why": "Binding caller's 'session' pointer into callee parameter; origin traced from client->session_list (TA-private data structure) but upstream tee_session provenance exists.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "close_ck_session(session);"
    }
  ]
}

関数: destroy_object
プロンプト 中間 (destroy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “destroy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from close_ck_session at lines [693, 1372]:
-- Call #1 at line 693 --
691:
692: while (!LIST_EMPTY(&session->object_list))
693: >>> destroy_object(session,
694: LIST_FIRST(&session->object_list), true);
695:
-- Call #2 at line 1372 --
1370: LIST_FOREACH_SAFE(obj, &sess->object_list, link, tobj) { 1371: if (object_is_private(obj->attributes)) 1372: >>> destroy_object(sess, obj, true); 1373: }
1374:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

134: void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj,
135: bool session_only)
136: { 137: #ifdef DEBUG 138: trace_attributes("[destroy]", obj->attributes); 139: if (obj->uuid) 140: MSG_RAW("[destroy] obj uuid %pUl", (void *)obj->uuid); 141: #endif 142: 143: if (session_only) { 144: 145: handle_put(get_object_handle_db(session), 146: pkcs11_object2handle(obj, session)); 147: cleanup_volatile_obj_ref(obj); 148: 149: return; 150: } 151: 152: 153: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 154: assert(obj->uuid); 155: 156: if (unregister_persistent_object(session->token, obj->uuid) && 157: unregister_persistent_object(session->token, obj->uuid)) 158: TEE_Panic(0); 159: 160: handle_put(get_object_handle_db(session), 161: pkcs11_object2handle(obj, session)); 162: cleanup_persistent_object(obj, session->token); 163: 164: token_invalidate_object_handles(obj); 165: } else { 166: handle_put(get_object_handle_db(session), 167: pkcs11_object2handle(obj, session)); 168: cleanup_volatile_obj_ref(obj); 169: } 170: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "destroy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"destroy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (destroy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "destroy_object",
    "tainted_vars": [
      "session",
      "obj",
      "session_only",
      "obj->attributes",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->attributes",
        "rhs": "obj (field access) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:138",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:137-141"
      },
      {
        "lhs": "handle db key (pkcs11_object2handle(obj, session))",
        "rhs": "obj, session passed into handle_put",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:145-146,160-161,166-167"
      },
      {
        "lhs": "obj->uuid",
        "rhs": "obj (field) used in unregister_persistent_object and assert",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:153-156"
      }
    ],
    "sanitizers": [
      {
        "kind": "assert",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:154",
        "evidence": "assert(obj->uuid) when PKCS11_CKA_TOKEN is true"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 693,
      "function": "destroy_object",
      "rule": "other",
      "why": "Binding caller-provided 'session' and list-first object into destroy_object; origin is TA-private session->object_list but upstream session derived from client list.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(session, LIST_FIRST(&session->object_list), true);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1372,
      "function": "destroy_object",
      "rule": "other",
      "why": "Binding callee parameters from iterator 'sess' and 'obj' (object_is_private branch); both originate from session object list (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "destroy_object(sess, obj, true);"
    }
  ]
}

関数: unregister_persistent_object
プロンプト 中間 (unregister_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “unregister_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from destroy_object at lines [156, 157]:
-- Call #1 at line 156 --
154: assert(obj->uuid);
155:
156: >>> if (unregister_persistent_object(session->token, obj->uuid) &&
157: unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
-- Call #2 at line 157 --
155:
156: if (unregister_persistent_object(session->token, obj->uuid) &&
157: >>> unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
159:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

353: enum pkcs11_rc unregister_persistent_object(struct ck_token *token,
354: TEE_UUID *uuid)
355: { 356: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 357: struct token_persistent_objs *ptr = NULL; 358: TEE_Result res = TEE_ERROR_GENERIC; 359: int count = 0; 360: int idx = 0; 361: 362: if (!uuid) 363: return PKCS11_CKR_OK; 364: 365: idx = get_persistent_obj_idx(token, uuid); 366: if (idx < 0) { 367: DMSG("Cannot unregister an invalid persistent object"); 368: return PKCS11_RV_NOT_FOUND; 369: } 370: 371: ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + 372: ((token->db_objs->count - 1) * sizeof(TEE_UUID)), 373: TEE_USER_MEM_HINT_NO_FILL_ZERO); 374: if (!ptr) 375: return PKCS11_CKR_DEVICE_MEMORY; 376: 377: res = open_db_file(token, &db_hdl); 378: if (res) 379: goto out; 380: 381: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 382: TEE_DATA_SEEK_SET); 383: if (res) { 384: DMSG("Failed to read database"); 385: goto out; 386: } 387: 388: TEE_MemMove(ptr, token->db_objs, 389: sizeof(struct token_persistent_objs) + 390: idx * sizeof(TEE_UUID)); 391: 392: ptr->count--; 393: count = ptr->count - idx; 394: 395: TEE_MemMove(&ptr->uuids[idx], 396: &token->db_objs->uuids[idx + 1], 397: count * sizeof(TEE_UUID)); 398: 399: res = TEE_WriteObjectData(db_hdl, ptr, 400: sizeof(struct token_persistent_objs) + 401: ptr->count * sizeof(TEE_UUID)); 402: if (res) 403: DMSG("Failed to update database"); 404: TEE_Free(token->db_objs); 405: token->db_objs = ptr; 406: ptr = NULL; 407: 408: out: 409: TEE_CloseObject(db_hdl); 410: TEE_Free(ptr); 411: 412: return tee2pkcs_error(res); 413: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "unregister_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"unregister_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (unregister_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "unregister_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "res",
      "idx",
      "token->db_objs"
    ],
    "propagation": [
      {
        "lhs": "idx",
        "rhs": "get_persistent_obj_idx(token, uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Malloc(...) sized from token->db_objs->count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375"
      },
      {
        "lhs": "ptr contents",
        "rhs": "TEE_MemMove(ptr, token->db_objs, sizeof(...)+idx*sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-396"
      },
      {
        "lhs": "token->db_objs",
        "rhs": "updated to ptr after write",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399-406"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-364",
        "evidence": "returns OK if uuid is NULL"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "idx < 0 leads to not-found return"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Binding session->token (TA-managed token structure) into callee parameter; origin is TA-private token object from session.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Binding obj->uuid (object field) into callee parameter; uuid is asserted non-NULL and originates from object metadata (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [377, 441, 598]:
-- Call #1 at line 377 --
375: return PKCS11_CKR_DEVICE_MEMORY;
376:
377: >>> res = open_db_file(token, &db_hdl);
378: if (res)
379: goto out;
-- Call #2 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #3 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "zero-initialized local buffer then populated by get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46"
      },
      {
        "lhs": "res",
        "rhs": "return value of TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name(token, file, sizeof(file)) returns error on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller's 'token' (from unregister_persistent_object) into callee; token is TA-managed structure originating upstream.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller-local 'db_hdl' address as out_hdl into callee; out handle originates on caller stack.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller's 'token' into callee at second call site; same TA-private provenance as above.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller-local 'db_hdl' address into callee at second call site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller's 'token' into callee at third call site; token remains TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding caller-local 'db_hdl' address into callee at third call site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_ObjectHandle),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "written by snprintf using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n against size and returns error if overflow/neg"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding caller's 'token' (TA-managed token) into callee; token originates from TA structures.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding caller-local buffer 'file' as name parameter into callee; buffer is stack-allocated in caller.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding literal sizeof(file) as size parameter into callee; controls snprintf bounds check.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding caller's 'token' into callee at second call site; same TA-private provenance.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding caller buffer 'file' into callee at second call site; buffer used to hold DB filename.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding size argument sizeof(file) into callee at second call site; used for snprintf bound checking.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=PERSISTENT_OBJECT_ID_LEN,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "n",
      "get_token_id(token)"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (buffer contents)",
        "rhs": "written by snprintf using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "formatted token id",
        "rhs": "get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "caller checks snprintf return n against size and returns error on overflow/negative"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Binding caller-provided buffer 'name' into snprintf destination; buffer originates from caller and controls output storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Binding size argument into snprintf bounds; size controls snprintf limit and is caller-provided.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "get_token_id(token) value flows into formatted output; token provenance is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=sizeof(unsigned),dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes formatted TA-private token id into a caller-controlled TA-private buffer with immediate return-on-overflow check (n < 0 || (size_t)n >= size).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "get_token_id(token) (TA-private token metadata)",
      "propagation_path": [
        "get_token_id(token) -> snprintf format arg @ persistent_token.c:30",
        "snprintf writes into local buffer 'name' provided by caller (open_db_file) @ persistent_token.c:30"
      ],
      "sink": "snprintf(name, size, ...) @ persistent_token.c:30"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker can influence token id (unlikely; token is TA-managed)"
      ],
      "attack_scenario": "Not practical: formatted output uses TA-private token id and is bounded; overflow path causes function to return error.",
      "impact": "None significant for confidentiality/integrity because data is TA-private and bounds are checked."
    },
    "missing_mitigations": [
      {
        "type": "none",
        "location": "unknown",
        "recommendation": "none"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "explicit snprintf return-value check against size at persistent_token.c:32-33"
      ],
      "negative_indicators": [
        "none"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The sink formats TA-private data into a TA-private buffer and an explicit bounds check ensures no overflow; no tainted REE-origin input reaches this snprintf, so not vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "snprintf usage is bounded and the formatted data originates from TA-private token metadata; return check prevents overflow.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "caller-provided buffer with size validated via snprintf return check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "size",
      "why_safe": "size is sizeof(file) (compile-time constant PERSISTENT_OBJECT_ID_LEN) passed from open_db_file",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46"
    }
  ],
  "residual_risks": [
    "line 366: TEE_MemMove writes rc into params[0].memref.buffer (REE-visible) — structural risk of REE-visible write persists"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit snprintf bounds check",
      "formatted value is TA-private (get_token_id)"
    ],
    "negative_indicators": [
      "none"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Bounds checking of snprintf and TA-private provenance of inputs mitigate memory-safety and information-disclosure concerns at this call site.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 377,
      "function": "open_db_file",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Binding token into open_db_file parameter; token is TA-managed structure.",
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=0,src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "why": "Passing obj->uuid (asserted non-NULL) into unregister_persistent_object; uuid originates from TA object metadata.",
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    }
  ]
}
フロー #197: TA_InvokeCommandEntryPoint -> entry_destroy_object -> destroy_object -> unregister_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_destroy_objectdestroy_objectunregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 159.09秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: The snprintf call is protected by an explicit bounds check immediately after, writes to a TEE-private buffer, and does not itself copy data to REE; therefore it is not vulnerable at this line.

信頼度: MEDIUM

LLM対話履歴 (12 メッセージ)

関数: destroy_object
プロンプト 中間 (destroy_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “destroy_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_destroy_object at lines [455]:
-- Call #1 at line 455 --
453: return PKCS11_CKR_ACTION_PROHIBITED;
454:
455: >>> destroy_object(session, object, false);
456:
457: DMSG("PKCS11 session %"PRIu32": destroy object %#"PRIx32,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

134: void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj,
135: bool session_only)
136: { 137: #ifdef DEBUG 138: trace_attributes("[destroy]", obj->attributes); 139: if (obj->uuid) 140: MSG_RAW("[destroy] obj uuid %pUl", (void *)obj->uuid); 141: #endif 142: 143: if (session_only) { 144: 145: handle_put(get_object_handle_db(session), 146: pkcs11_object2handle(obj, session)); 147: cleanup_volatile_obj_ref(obj); 148: 149: return; 150: } 151: 152: 153: if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) { 154: assert(obj->uuid); 155: 156: if (unregister_persistent_object(session->token, obj->uuid) && 157: unregister_persistent_object(session->token, obj->uuid)) 158: TEE_Panic(0); 159: 160: handle_put(get_object_handle_db(session), 161: pkcs11_object2handle(obj, session)); 162: cleanup_persistent_object(obj, session->token); 163: 164: token_invalidate_object_handles(obj); 165: } else { 166: handle_put(get_object_handle_db(session), 167: pkcs11_object2handle(obj, session)); 168: cleanup_volatile_obj_ref(obj); 169: } 170: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "destroy_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"destroy_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (destroy_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "destroy_object",
    "tainted_vars": [
      "session",
      "obj",
      "session_only",
      "obj->attributes",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->attributes",
        "rhs": "obj (callee parameter)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:134-136"
      },
      {
        "lhs": "obj->uuid",
        "rhs": "obj (callee parameter)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:138-141,154"
      },
      {
        "lhs": "handle db operations",
        "rhs": "pkcs11_object2handle(obj, session)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:145-146,160-162,166-168"
      },
      {
        "lhs": "persistent unregister result",
        "rhs": "unregister_persistent_object(session->token, obj->uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:156-158"
      }
    ],
    "sanitizers": [
      {
        "kind": "assertion_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:154",
        "evidence": "assert(obj->uuid) when object marked PKCS11_CKA_TOKEN"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 134,
      "function": "destroy_object",
      "rule": "other",
      "why": "Binding callee parameter 'session' to caller-provided session value; origin is internal but derived from earlier REE-influenced lookup, so provenance is not purely private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:session",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj, bool session_only)"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 134,
      "function": "destroy_object",
      "rule": "other",
      "why": "Binding callee parameter 'obj' to caller object; object originates from pkcs11_handle2object (internal) but was selected using a handle parsed from REE input, so object attributes must be treated carefully.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "void destroy_object(struct pkcs11_session *session, struct pkcs11_object *obj, bool session_only)"
    }
  ]
}

関数: unregister_persistent_object
プロンプト 中間 (unregister_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “unregister_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from destroy_object at lines [156, 157]:
-- Call #1 at line 156 --
154: assert(obj->uuid);
155:
156: >>> if (unregister_persistent_object(session->token, obj->uuid) &&
157: unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
-- Call #2 at line 157 --
155:
156: if (unregister_persistent_object(session->token, obj->uuid) &&
157: >>> unregister_persistent_object(session->token, obj->uuid))
158: TEE_Panic(0);
159:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

353: enum pkcs11_rc unregister_persistent_object(struct ck_token *token,
354: TEE_UUID *uuid)
355: { 356: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 357: struct token_persistent_objs *ptr = NULL; 358: TEE_Result res = TEE_ERROR_GENERIC; 359: int count = 0; 360: int idx = 0; 361: 362: if (!uuid) 363: return PKCS11_CKR_OK; 364: 365: idx = get_persistent_obj_idx(token, uuid); 366: if (idx < 0) { 367: DMSG("Cannot unregister an invalid persistent object"); 368: return PKCS11_RV_NOT_FOUND; 369: } 370: 371: ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + 372: ((token->db_objs->count - 1) * sizeof(TEE_UUID)), 373: TEE_USER_MEM_HINT_NO_FILL_ZERO); 374: if (!ptr) 375: return PKCS11_CKR_DEVICE_MEMORY; 376: 377: res = open_db_file(token, &db_hdl); 378: if (res) 379: goto out; 380: 381: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 382: TEE_DATA_SEEK_SET); 383: if (res) { 384: DMSG("Failed to read database"); 385: goto out; 386: } 387: 388: TEE_MemMove(ptr, token->db_objs, 389: sizeof(struct token_persistent_objs) + 390: idx * sizeof(TEE_UUID)); 391: 392: ptr->count--; 393: count = ptr->count - idx; 394: 395: TEE_MemMove(&ptr->uuids[idx], 396: &token->db_objs->uuids[idx + 1], 397: count * sizeof(TEE_UUID)); 398: 399: res = TEE_WriteObjectData(db_hdl, ptr, 400: sizeof(struct token_persistent_objs) + 401: ptr->count * sizeof(TEE_UUID)); 402: if (res) 403: DMSG("Failed to update database"); 404: TEE_Free(token->db_objs); 405: token->db_objs = ptr; 406: ptr = NULL; 407: 408: out: 409: TEE_CloseObject(db_hdl); 410: TEE_Free(ptr); 411: 412: return tee2pkcs_error(res); 413: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "unregister_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"unregister_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (unregister_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "unregister_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "res",
      "count",
      "idx",
      "token->db_objs"
    ],
    "propagation": [
      {
        "lhs": "idx",
        "rhs": "get_persistent_obj_idx(token, uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365"
      },
      {
        "lhs": "ptr (allocated size)",
        "rhs": "sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-373"
      },
      {
        "lhs": "ptr (initial contents)",
        "rhs": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-391"
      },
      {
        "lhs": "ptr->uuids[idx]..",
        "rhs": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "database on-disk",
        "rhs": "TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399-401"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-364",
        "evidence": "if (!uuid) return PKCS11_CKR_OK"
      },
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "idx checked for < 0 and returns PKCS11_RV_NOT_FOUND"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:374-375",
        "evidence": "ptr NULL checked after TEE_Malloc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Binding callee parameter 'token' to session->token at call-site; origin derived from session that was influenced by earlier REE input, provenance not purely private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 156,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "Binding callee parameter 'uuid' to obj->uuid at call-site; obj->uuid asserted earlier but originally selected via handle parsed from REE input, so provenance is mixed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=sizeof(*uuid),dst_sz=unknown"
        ]
      },
      "code_excerpt": "if (unregister_persistent_object(session->token, obj->uuid) &&"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "TEE_MemMove copies token->db_objs into newly allocated ptr using idx derived from get_persistent_obj_idx(token, uuid); idx influenced by uuid which originated from earlier REE-driven handle parsing.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "TEE_MemMove shifts trailing UUIDs using count derived from ptr->count - idx; count is computed from ptr->count which depends on token->db_objs->count read earlier.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "unregister_persistent_object",
      "rule": "other",
      "why": "TEE_WriteObjectData writes updated ptr to persistent storage; data derived from token->db_objs with sizes computed from ptr->count.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [377, 441, 598]:
-- Call #1 at line 377 --
375: return PKCS11_CKR_DEVICE_MEMORY;
376:
377: >>> res = open_db_file(token, &db_hdl);
378: if (res)
379: goto out;
-- Call #2 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #3 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name return value checked and returned on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'token' to caller 'token' at call-site; token originates from session->token and provenance is mixed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 377,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'out_hdl' to caller '&db_hdl' (caller-local handle); out_hdl is written by callee via TEE_OpenPersistentObject.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE|unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'token' to caller 'token' at second call-site; provenance as above.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'out_hdl' to caller '&db_hdl' at second call-site; callee will populate handle via TEE_OpenPersistentObject.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE|unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'token' to caller 'token' at third call-site; same provenance concerns apply.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 598,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding callee parameter 'out_hdl' to caller '&db_hdl' at third call-site; out_hdl is an output handle pointer populated by callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE|unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "rule": "other",
      "why": "TEE_OpenPersistentObject is invoked with local 'file' buffer produced from token; filename derives from token and is used to open persistent storage.",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), TEE_DATA_FLAG_ACCESS_READ | TEE_DATA_FLAG_ACCESS_WRITE, out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "name",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "n",
        "rhs": "return value of snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks snprintf result n against size and returns TEE_ERROR_SECURITY on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding callee parameter 'token' to caller 'token' at call-site; token originates from session->token and provenance is mixed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding callee parameter 'name' to caller-local buffer 'file'; callee writes filename into this TEE-private buffer via snprintf.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding callee parameter 'token' to caller 'token' at second call-site; provenance as above (derived from session context).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 662,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding callee parameter 'name' to caller buffer 'file' at second call-site; callee populates filename into this TEE-private buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "format string",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "name (buffer contents)",
        "rhs": "formatted result of snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "n",
        "rhs": "return value of snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "Checks n < 0 or (size_t)n >= size and returns error on overflow"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Writes formatted filename into caller-provided buffer 'name' (TEE-private); buffer origin is caller-local and must be bounds-checked (snprintf result is checked afterwards).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=size,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes a formatted token filename into a TEE-private buffer and its return value is checked for overflow immediately after (bounds check present).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token/session derived via earlier REE-influenced flow",
      "propagation_path": [
        "params (REE) -> ctrl->memref.buffer @ ta/entry.c:420",
        "serialargs_get_u32 -> object_handle @ ta/object.c:426",
        "pkcs11_handle2object -> object @ ta/object.c:433",
        "session->token passed to unregister/open -> token @ ta/persistent_token.c:377",
        "get_token_id(token) used in snprintf @ ta/persistent_token.c:30"
      ],
      "sink": "snprintf writes into local 'file' buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or influences object handles passed from REE to the TA earlier in the chain"
      ],
      "attack_scenario": "An attacker-influenced token id could change the filename produced, causing different persistent object to be opened later, but snprintf itself is bounds-checked.",
      "impact": "Potential logic/path confusion when opening token DB; no direct memory corruption from snprintf due to immediate bounds check."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "persistent_token.c:48",
        "recommendation": "Validate that the resolved filename corresponds to an allowed token for this session before opening persistent storage."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "snprintf return value is checked (bounds check)",
        "filename buffer is TEE-private"
      ],
      "negative_indicators": [
        "token provenance originates from session which in turn was selected based on REE-provided handle earlier"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The snprintf call is protected by an explicit bounds check immediately after, writes to a TEE-private buffer, and does not itself copy data to REE; therefore it is not vulnerable at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Immediate bounds check on snprintf result and destination is TEE-private; no evidence of sensitive TA-private data being sent to REE at this call site.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY"
    }
  ],
  "argument_safety": [
    {
      "arg": "name (file buffer)",
      "why_safe": "Caller-provided TEE-private buffer with snprintf bounds checked",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "Integer token id used in format string; not treated as secret here",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "48: TEE_OpenPersistentObject uses the constructed filename to open persistent storage (potential path-selection influenced by earlier REE-derived handle).",
    "388/395: TEE_MemMove operations in unregister_persistent_object modify in-memory DB structures with sizes derived from token->db_objs and idx influenced by uuid parsed earlier.",
    "399: TEE_WriteObjectData writes updated DB contents to persistent storage (REE-visible destination); provenance and sensitivity of written data should be reviewed."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit snprintf result check",
      "local buffer usage (TEE-private)"
    ],
    "negative_indicators": [
      "upstream provenance of token derived from session which was selected using REE-supplied handle",
      "later operations use filename to access persistent storage"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "snprintf at line 30 is safeguarded by an immediate bounds check and writes into a TA-local buffer; higher-risk behaviors occur later when that filename is used to access persistent storage, which are captured as structural risks rather than vulnerabilities at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 48,
      "function": "open_db_file",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=unknown"
        ]
      },
      "why": "Filename computed by snprintf is used to open a persistent object; filename provenance is influenced by token/session originating from REE-derived handle.",
      "code_excerpt": "return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), ... , out_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "why": "Copies DB metadata influenced by idx derived from uuid parsed earlier (provenance from REE-derived handle).",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "why": "Shifts trailing UUIDs based on computed count; sizes depend on token->db_objs->count.",
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "why": "Writes updated DB contents to persistent storage; data derived from token->db_objs and influenced by earlier REE-provided handle selection.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #198: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> register_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objectregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 143.94秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: Bounds-check after snprintf prevents accepting truncated/overflowed writes; no evidence of sensitive data exposure at this call site, so not classified as unencrypted_output or memory-safety vulnerability.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: register_persistent_object
プロンプト 中間 (register_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “register_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [268]:
-- Call #1 at line 268 --
266: }
267:
268: >>> rc = register_persistent_object(get_session_token(session),
269: obj->uuid);
270: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

415: enum pkcs11_rc register_persistent_object(struct ck_token *token,
416: TEE_UUID *uuid)
417: { 418: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 419: TEE_Result res = TEE_ERROR_GENERIC; 420: void *ptr = NULL; 421: size_t size = 0; 422: int count = 0; 423: 424: if (get_persistent_obj_idx(token, uuid) >= 0) 425: TEE_Panic(0); 426: 427: count = token->db_objs->count; 428: ptr = TEE_Realloc(token->db_objs, 429: sizeof(struct token_persistent_objs) + 430: ((count + 1) * sizeof(TEE_UUID))); 431: if (!ptr) 432: return PKCS11_CKR_DEVICE_MEMORY; 433: 434: token->db_objs = ptr; 435: TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID)); 436: 437: size = sizeof(struct token_persistent_main) + 438: sizeof(struct token_persistent_objs) + 439: count * sizeof(TEE_UUID); 440: 441: res = open_db_file(token, &db_hdl); 442: if (res) 443: goto out; 444: 445: res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID)); 446: if (res) 447: goto out; 448: 449: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 450: TEE_DATA_SEEK_SET); 451: if (res) 452: goto out; 453: 454: token->db_objs->count++; 455: 456: res = TEE_WriteObjectData(db_hdl, token->db_objs, 457: sizeof(struct token_persistent_objs) + 458: token->db_objs->count * sizeof(TEE_UUID)); 459: if (res) 460: token->db_objs->count--; 461: 462: out: 463: TEE_CloseObject(db_hdl); 464: 465: return tee2pkcs_error(res); 466: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "register_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"register_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (register_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "register_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "token->db_objs",
      "count",
      "res"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "token->db_objs->count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:427"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Realloc(token->db_objs, sizeof(struct token_persistent_objs) + ((count + 1) * sizeof(TEE_UUID)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-431"
      },
      {
        "lhs": "token->db_objs",
        "rhs": "ptr (reallocated region)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:434"
      },
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "uuid",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "db file size",
        "rhs": "sizeof(struct token_persistent_main) + sizeof(struct token_persistent_objs) + count * sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-439"
      },
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:441-443"
      },
      {
        "lhs": "persistent storage",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:456-458"
      }
    ],
    "sanitizers": [
      {
        "kind": "dup_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:424-425",
        "evidence": "get_persistent_obj_idx(token, uuid) >= 0 triggers TEE_Panic to prevent duplicates"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:431-432",
        "evidence": "checks return of TEE_Realloc and returns DEVICE_MEMORY on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 268,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "callee 'token' parameter is bound to get_session_token(session) at call-site; origin is TA session token structure (provenance across calls is structural risk)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = register_persistent_object(get_session_token(session), obj->uuid);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 268,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "callee 'uuid' parameter is bound to obj->uuid at call-site; uuid may originate from obj attributes derived earlier (potentially REE-derived), so provenance is uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "rc = register_persistent_object(get_session_token(session), obj->uuid);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "Copies provided uuid into token->db_objs (persistent index) via TEE_MemMove; source uuid provenance uncertain (may be REE-derived)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "Writes token->db_objs (including uuids array) to persistent storage via TEE_WriteObjectData; this persists data that may have originated outside TEE",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),src_sz=that,size=disk"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [441, 598]:
-- Call #1 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #2 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "get_db_file_name(token, file, sizeof(file)) writes filename into local buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "res",
        "rhs": "return value of get_db_file_name()",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46"
      },
      {
        "lhs": "outcome",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), flags, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "returns early if get_db_file_name() returns non-zero"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "caller passes token (get_session_token(session)) into open_db_file; callee parameter 'token' binds to caller token structure (provenance across calls is a structural risk)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "caller passes &db_hdl (address of local handle) as out_hdl; callee will write back into caller stack slot",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "open_db_file",
      "rule": "other",
      "why": "Filename buffer 'file' is populated from token via get_db_file_name and then used to open a persistent object; filename provenance may be influenced by earlier REE-derived attributes",
      "sink_function": "TEE_OpenPersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(file),src_sz=sizeof(file),dst_sz=storage"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));\nreturn TEE_OpenPersistentObject(..., file, sizeof(file), ..., out_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (output buffer)",
        "rhs": "formatted string containing get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n and returns error if n < 0 or n >= size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "callee 'token' parameter is bound to caller token; token provenance (possibly influenced by earlier REE-derived attributes) is uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "writes formatted filename into caller-provided buffer 'name'; buffer origin at call-site is local stack in caller but provenance may vary",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "format",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name (buffer)",
        "rhs": "formatted string containing get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n and returns error if n < 0 or (size_t)n >= size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Writes formatted filename into caller-provided buffer 'name' which was supplied by caller; buffer origin may be caller stack or REE-derived memory",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=n,src_sz=sizeof(\"token.db.%u\")+digits,get_token_id_size=?,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Binding: callee 'name' parameter aliases caller buffer passed at call-site; provenance of that buffer is uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token))"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes formatted token id into caller buffer but the return value 'n' is checked against size and error is returned on overflow, preventing buffer overflow or truncated acceptance.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token / get_token_id(token) (provenance uncertain)",
      "propagation_path": [
        "session/obj attributes -> template/head (processing.c:263-267)",
        "head -> create_object(...) (processing.c:310)",
        "obj->uuid passed to register_persistent_object(...) (object.c:268)",
        "register_persistent_object -> open_db_file(token, &db_hdl) (processing.c:441)",
        "open_db_file -> get_db_file_name(token, file, sizeof(file)) (persistent_token.c:44)",
        "get_db_file_name -> snprintf(name, size, \"token.db.%u\", get_token_id(token)) (persistent_token.c:30)"
      ],
      "sink": "snprintf writes filename into caller buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed or attacker-influenced token id (uncertain provenance)",
        "caller provides insufficient buffer (but get_db_file_name checks this)"
      ],
      "attack_scenario": "An attacker would need to influence token id or caller buffer semantics to cause incorrect filename handling; bounds check prevents overflow.",
      "impact": "If provenance were adversarial and checks absent, could cause buffer overflow; with present checks impact is negligible."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "get_db_file_name:30",
        "recommendation": "Ensure get_token_id(token) is validated and token provenance asserted before use; document trust boundary."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Presence of snprintf return-value check (n < 0 || (size_t)n >= size)",
        "size parameter passed to snprintf equals buffer size"
      ],
      "negative_indicators": [
        "Origin of 'token' may be influenced by earlier REE-derived data (uncertain provenance)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Bounds-check after snprintf prevents accepting truncated/overflowed writes; no evidence of sensitive data exposure at this call site, so not classified as unencrypted_output or memory-safety vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The snprintf usesite performs a correct return-value bounds check and the formatted content is non-sensitive (token id); provenance uncertainties are structural but guarded.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name (caller buffer)",
      "why_safe": "Caller supplies buffer and size; snprintf return is validated against size",
      "evidence": "persistent_token.c:30-33"
    },
    {
      "arg": "get_token_id(token)",
      "why_safe": "Used only for numeric formatting into filename; not treated as secret",
      "evidence": "persistent_token.c:30"
    }
  ],
  "residual_risks": [
    "token provenance uncertain: token-derived values (uuid/attributes) earlier in chain may be REE-influenced and later persisted without thorough provenance checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit snprintf return-value and bounds check",
      "No subsequent copy of this filename to REE observed at this line"
    ],
    "negative_indicators": [
      "Upstream structural risks where REE-derived attributes are later persisted"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The call-site includes an effective bounds check that blocks memory-safety issues; the data formatted is not marked sensitive and is used to open a storage object (TA-private). Therefore the sink at line 30 is not vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); destination is shared though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 322,
      "function": "entry_generate_secret",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Writes generated object handle into caller-provided output memref (REE-visible)",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "create_object",
      "sink_function": "TEE_CreatePersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=storage"
        ]
      },
      "why": "Creates persistent object from obj->attributes which may include REE-derived attribute bytes",
      "code_excerpt": "TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "why": "Copies uuid into token persistent index; uuid provenance may be REE-influenced",
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "register_persistent_object",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),src_sz=that,dst_sz=storage"
        ]
      },
      "why": "Persists token->db_objs (including uuids) to storage; data may originate outside TEE",
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #199: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> register_persistent_object -> open_db_file -> get_db_file_name -> snprintf
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objectregister_persistent_objectopen_db_fileget_db_file_namesnprintf

実行時間: 103.36秒

ターゲットシンク情報

シンク関数: snprintf

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30

パラメータインデックス: 0

解析結果

詳細: The sink is fed from TA-internal data (not REE-tainted) and an explicit bounds check on snprintf's return prevents overflow, so this call does not meet the tainted→dangerous sink vulnerability criteria.

信頼度: HIGH

LLM対話履歴 (10 メッセージ)

関数: register_persistent_object
プロンプト 中間 (register_persistent_object)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “register_persistent_object” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [268]:
-- Call #1 at line 268 --
266: }
267:
268: >>> rc = register_persistent_object(get_session_token(session),
269: obj->uuid);
270: if (rc)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

415: enum pkcs11_rc register_persistent_object(struct ck_token *token,
416: TEE_UUID *uuid)
417: { 418: TEE_ObjectHandle db_hdl = TEE_HANDLE_NULL; 419: TEE_Result res = TEE_ERROR_GENERIC; 420: void *ptr = NULL; 421: size_t size = 0; 422: int count = 0; 423: 424: if (get_persistent_obj_idx(token, uuid) >= 0) 425: TEE_Panic(0); 426: 427: count = token->db_objs->count; 428: ptr = TEE_Realloc(token->db_objs, 429: sizeof(struct token_persistent_objs) + 430: ((count + 1) * sizeof(TEE_UUID))); 431: if (!ptr) 432: return PKCS11_CKR_DEVICE_MEMORY; 433: 434: token->db_objs = ptr; 435: TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID)); 436: 437: size = sizeof(struct token_persistent_main) + 438: sizeof(struct token_persistent_objs) + 439: count * sizeof(TEE_UUID); 440: 441: res = open_db_file(token, &db_hdl); 442: if (res) 443: goto out; 444: 445: res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID)); 446: if (res) 447: goto out; 448: 449: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main), 450: TEE_DATA_SEEK_SET); 451: if (res) 452: goto out; 453: 454: token->db_objs->count++; 455: 456: res = TEE_WriteObjectData(db_hdl, token->db_objs, 457: sizeof(struct token_persistent_objs) + 458: token->db_objs->count * sizeof(TEE_UUID)); 459: if (res) 460: token->db_objs->count--; 461: 462: out: 463: TEE_CloseObject(db_hdl); 464: 465: return tee2pkcs_error(res); 466: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "register_persistent_object", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"register_persistent_object", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (register_persistent_object)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "register_persistent_object",
    "tainted_vars": [
      "token",
      "uuid",
      "db_hdl",
      "ptr",
      "size",
      "count",
      "token->db_objs",
      "token->db_objs->uuids"
    ],
    "propagation": [
      {
        "lhs": "count",
        "rhs": "token->db_objs->count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:427-427"
      },
      {
        "lhs": "ptr",
        "rhs": "TEE_Realloc(token->db_objs, sizeof(struct token_persistent_objs) + ((count + 1) * sizeof(TEE_UUID)))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-432"
      },
      {
        "lhs": "token->db_objs",
        "rhs": "ptr",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:434-434"
      },
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "uuid",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435-435"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:456-459"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:424-425",
        "evidence": "get_persistent_obj_idx(token, uuid) checked and TEE_Panic if >= 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 268,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "Binding of callee 'token' parameter to caller get_session_token(session) origin (session token); pointer provenance is TA-managed session token",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = register_persistent_object(get_session_token(session), obj->uuid);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 268,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "Binding of callee 'uuid' parameter to caller 'obj->uuid'; uuid produced inside TA and passed in",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = register_persistent_object(get_session_token(session), obj->uuid);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "rule": "other",
      "why": "Copies UUID into token->db_objs array via TEE_MemMove/implicit move; destination is token-managed storage grown by TEE_Realloc",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((count+1)*sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: open_db_file
プロンプト 中間 (open_db_file)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “open_db_file” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [441, 598]:
-- Call #1 at line 441 --
439: count * sizeof(TEE_UUID);
440:
441: >>> res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
-- Call #2 at line 598 --
596: goto error;
597:
598: >>> res = open_db_file(token, &db_hdl);
599:
600:     	if (res == TEE_SUCCESS) {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

38: static TEE_Result open_db_file(struct ck_token *token,
39: TEE_ObjectHandle *out_hdl)
40: {
41: char file[PERSISTENT_OBJECT_ID_LEN] = { };
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
47:
48: return TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file),
49: TEE_DATA_FLAG_ACCESS_READ |
50: TEE_DATA_FLAG_ACCESS_WRITE,
51: out_hdl);
52: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"open_db_file",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (open_db_file)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "open_db_file",
    "tainted_vars": [
      "token",
      "out_hdl",
      "file",
      "res"
    ],
    "propagation": [
      {
        "lhs": "file",
        "rhs": "zero-initialized local buffer then filled by get_db_file_name(token, file, sizeof(file))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:41-46"
      },
      {
        "lhs": "res",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, file, sizeof(file), flags, out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      },
      {
        "lhs": "*out_hdl",
        "rhs": "TEE_OpenPersistentObject(..., out_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:48-51"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:44-46",
        "evidence": "get_db_file_name(token, file, sizeof(file)) called with explicit buffer length"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding of callee 'token' parameter to caller-provided token (from create_object/get_session_token); token is TA-managed session token",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 441,
      "function": "open_db_file",
      "rule": "other",
      "why": "Binding of callee out parameter 'out_hdl' to caller '&db_hdl' (caller-local handle) so returned handle is written into caller storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "res = open_db_file(token, &db_hdl);"
    }
  ]
}

関数: get_db_file_name
プロンプト 中間 (get_db_file_name)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “get_db_file_name” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from open_db_file at lines [44, 662]:
-- Call #1 at line 44 --
42: TEE_Result res = TEE_ERROR_GENERIC;
43:
44: >>> res = get_db_file_name(token, file, sizeof(file));
45: if (res)
46: return res;
-- Call #2 at line 662 --
660: PKCS11_CKFT_LOGIN_REQUIRED;
661:
662: >>> res = get_db_file_name(token, file, sizeof(file));
663: if (res)
664: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

27: static TEE_Result get_db_file_name(struct ck_token *token,
28: char *name, size_t size)
29: { 30: int n = snprintf(name, size, "token.db.%u", get_token_id(token)); 31: 32: if (n < 0 || (size_t)n >= size) 33: return TEE_ERROR_SECURITY; 34: else 35: return TEE_SUCCESS; 36: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "get_db_file_name", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"get_db_file_name", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (get_db_file_name)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "get_db_file_name",
    "tainted_vars": [
      "token",
      "name",
      "size",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-30"
      },
      {
        "lhs": "name",
        "rhs": "formatted string from get_token_id(token) via snprintf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-30"
      },
      {
        "lhs": "return res",
        "rhs": "bounds check on snprintf result (n < 0 || (size_t)n >= size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-35"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n for negative or overflow against buffer size and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "other",
      "why": "Binding of callee 'token' parameter to caller-provided token; provenance originates from caller's session token",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = get_db_file_name(token, file, sizeof(file));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 44,
      "function": "get_db_file_name",
      "rule": "weak_input_validation",
      "why": "Writes formatted filename into caller-supplied buffer 'name' via snprintf; relies on snprintf return check for overflow",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n (snprintf result),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: snprintf
プロンプト 中間 (snprintf)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “snprintf” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from get_db_file_name at lines [30]:
-- Call #1 at line 30 --
28: char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 30:
25:      * storage.
26:      */
27:     static TEE_Result get_db_file_name(struct ck_token *token,
28:     				   char *name, size_t size)
29:     {
30: >>> 	int n = snprintf(name, size, "token.db.%u", get_token_id(token));
31:     
32:     	if (n < 0 || (size_t)n >= size)
33:     		return TEE_ERROR_SECURITY;
34:     	else
35:     		return TEE_SUCCESS;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"snprintf",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (snprintf)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "snprintf",
    "tainted_vars": [
      "name",
      "size",
      "format string",
      "get_token_id(token)",
      "n"
    ],
    "propagation": [
      {
        "lhs": "n",
        "rhs": "snprintf(name, size, \"token.db.%u\", get_token_id(token))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      },
      {
        "lhs": "name",
        "rhs": "formatted output of snprintf using get_token_id(token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:32-33",
        "evidence": "checks snprintf return n for negative or overflow against buffer size and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "weak_input_validation",
      "why": "Writes formatted filename into caller-supplied buffer 'name'; safety relies on snprintf return check which must be correct to avoid overflow",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=n (snprintf result),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "int n = snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Binding of callee parameter 'name' to caller-provided buffer 'file' (caller stack/local) passed into get_db_file_name",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(formatted_string),src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 30,
      "function": "snprintf",
      "rule": "other",
      "why": "Binding of callee parameter 'size' to caller-provided size argument (sizeof(file))",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size_t value,src_sz=unknown,dst_sz=sizeof(file)"
        ]
      },
      "code_excerpt": "snprintf(name, size, \"token.db.%u\", get_token_id(token));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: snprintf
- target_sink_lines: [30]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [30] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "snprintf",
    "lines": [
      30
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 30,
      "function": "get_db_file_name",
      "sink_function": "snprintf",
      "status": "safe",
      "why": "snprintf writes a filename into a TA-local buffer using get_token_id(token) (TA-derived) and the result is checked for overflow (n < 0 || (size_t)n >= size).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "get_token_id(token) (TA-internal)",
      "propagation_path": [
        "get_token_id(token) -> snprintf format arg @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30"
      ],
      "sink": "snprintf writing into caller buffer 'name' (TA-local)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker must control TA-internal token id (unlikely)"
      ],
      "attack_scenario": "Unlikely: crafted token id causing snprintf to claim larger output leading to error return; no REE-exfiltration on this line.",
      "impact": "If any, local failure/TEE_ERROR_SECURITY return; no confidential data leakage from this call."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "get_db_file_name:30-33",
        "recommendation": "Ensure get_token_id cannot produce values that cause snprintf to misreport and consider explicit snprintf return handling and explicit null-termination guarantees."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "snprintf return is checked and compared to buffer size",
        "format uses simple unsigned integer from get_token_id(token)"
      ],
      "negative_indicators": [
        "no further validation of get_token_id(token) shown (but it's TA-internal)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "The sink is fed from TA-internal data (not REE-tainted) and an explicit bounds check on snprintf's return prevents overflow, so this call does not meet the tainted→dangerous sink vulnerability criteria.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Input to snprintf is TA-internal and the return value is checked against buffer size, preventing overflow/tainted-data-to-sink issues at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "get_db_file_name:32-33",
      "evidence": "if (n < 0 || (size_t)n >= size) return TEE_ERROR_SECURITY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "name",
      "why_safe": "Caller-supplied buffer size is passed and snprintf return is validated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30-33"
    },
    {
      "arg": "size",
      "why_safe": "Size is explicit (sizeof(file)) and used in bounds check",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:30,32-33"
    }
  ],
  "residual_risks": [
    "Other TA lines copy TA-generated handles/UUIDs into REE-visible buffers (TEE_MemMove at processing.c:555 and entry.c:366) — those are structural risks not promoted here."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct bounds check after snprintf",
      "Data originates inside the TA (get_token_id)"
    ],
    "negative_indicators": [
      "Assumes correctness of get_token_id and snprintf implementation"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No vulnerability found at snprintf line because source is TA-private and an effective bounds check exists; remaining concerns are structural and elsewhere in the call chain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((count+1)*sizeof(TEE_UUID))"
        ]
      },
      "why": "Copies UUID into token->db_objs array via TEE_MemMove/implicit move; destination is token-managed storage grown by TEE_Realloc.",
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 285,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Assigns generated object handle into caller-provided out_handle.",
      "code_excerpt": "*out_handle = obj_handle;"
    }
  ]
}
フロー #200: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_token_initializeupdate_persistent_dbTEE_WriteObjectData

実行時間: 49.70秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

詳細: No direct memory-safety issue at this call (fixed-size write) and destination region is not proven REE-visible, so cannot deterministically classify as unencrypted_output; thus not marked vulnerable but residual risks remain.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buf",
      "size",
      "res"
    ],
    "propagation": [
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) result",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      },
      {
        "lhs": "persistent storage (db object)",
        "rhs": "buf (token->db_main) written by TEE_WriteObjectData",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: db_hdl is an object handle created locally (open_db_file) passed into TEE_WriteObjectData; origin is TA-managed handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buf argument token->db_main is TA memory (but influenced by earlier REE-derived token_id); alias of TA structure passed to write API.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes TA-held token database structure to persistent storage via TEE_WriteObjectData; destination protection/visibility not proven here.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "safe",
      "why": "Writes TA-private token->db_main (fixed-size sizeof(*token->db_main)) to persistent storage; no tainted size/bounds issue at this call site and no proof destination is REE-visible so cannot promote to unencrypted_output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-derived inputs (params -> ctrlargs -> pin/label/token_id) influence token->db_main contents",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:838",
        "serialargs_get_ptr -> pin (pointer into ctrl buffer) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:852",
        "token->db_main modified in entry_ck_token_initialize -> update_persistent_db(token) @ entry.c:908",
        "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) @ persistent_token.c:64"
      ],
      "sink": "TEE_WriteObjectData writing token->db_main to persistent storage"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE input constructs malicious ctrlargs that influence token->db_main fields",
        "Access to invoke PKCS11_CMD_INIT_TOKEN path"
      ],
      "attack_scenario": "Malicious REE inputs could cause unsafe or unexpected token DB contents to be written to persistent storage, possibly corrupting DB semantics.",
      "impact": "Possible persistent DB corruption or leakage depending on persistent storage protection; writing credential-like fields might expose secrets if backing store is not properly protected."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "update_persistent_db:64",
        "recommendation": "Ensure persistent object handle (db_hdl) is created with appropriate object attributes/permissions restricting REE visibility and require authentication before modifying sensitive fields"
      },
      {
        "type": "type_validation",
        "location": "entry_ck_token_initialize:838-856",
        "recommendation": "Validate serialargs_get_ptr returns pointer within expected bounds and explicitly copy/zero sensitive fields rather than aliasing REE buffers"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source bytes originate from TA-managed structure token->db_main",
        "Write uses fixed sizeof(*token->db_main) not attacker-controlled length"
      ],
      "negative_indicators": [
        "Destination protection/visibility (persistent storage) is unknown",
        "token->db_main contains credential-like fields influenced by REE inputs"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "No direct memory-safety issue at this call (fixed-size write) and destination region is not proven REE-visible, so cannot deterministically classify as unencrypted_output; thus not marked vulnerable but residual risks remain.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_WriteObjectData at line 64 writes a fixed-size TA-private structure; no tainted length or bounds violation is present and destination visibility is unknown so unencrypted_output cannot be asserted.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_token_initialize:835-836",
      "evidence": "ptypes compared to expected exp_pt"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_initialize:856-857",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_initialize:924-926",
      "evidence": "pin_size compared to PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    }
  ],
  "argument_safety": [
    {
      "arg": "db_hdl",
      "why_safe": "Handle created by open_db_file before write; not directly REE-originated",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63"
    },
    {
      "arg": "token->db_main",
      "why_safe": "TA-owned structure and written with fixed sizeof; however contains fields derived from REE inputs",
      "evidence": "entry_ck_token_initialize serialargs reads -> token fields set; update_persistent_db writes sizeof(*token->db_main)"
    }
  ],
  "residual_risks": [
    "Line 64 could result in persistent storage of credential-like fields (token->db_main) that were influenced by REE inputs; destination exposure unknown so possible sensitive data leakage if persistent object is accessible to REE."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed-size write (sizeof(*token->db_main))",
      "No tainted/attacker-controlled size at sink"
    ],
    "negative_indicators": [
      "Persistent destination region/protection unknown",
      "Upstream REE-derived data (pin/label) influence token->db_main"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Priority memory-safety check finds no tainted size/bounds issues; lacking proof the persistent destination is REE-visible prevents promotion to unencrypted_output. Structural risks from REE-influenced contents remain and require mitigations.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer (pin) using pin_size from REE without further containment proof.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 190,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: params (caller-provided memref buffer) aliased into callee parameter (ctrl) — shared REE buffer passed to TA.",
      "code_excerpt": "rc = entry_ck_token_initialize(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes TA-held token database structure to persistent storage via TEE_WriteObjectData; destination protection/visibility not proven here.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #201: TA_InvokeCommandEntryPoint -> entry_ck_init_pin -> set_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_init_pinset_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 50.62秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

安全判定理由: The write at line 64 persists TEE-private data to TA-managed persistent storage (dst_region TEE-private), not REE-visible memory; size is fixed and not derived from untrusted input, and prior checks/sanitizers ensure correctness.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buffer",
      "size",
      "res"
    ],
    "propagation": [
      {
        "lhs": "buffer (callee)",
        "rhs": "caller-provided pointer (e.g., token->db_main, ptr, token->db_objs, obj->attributes, db_objs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64,399,456,563,693"
      },
      {
        "lhs": "db_hdl (callee)",
        "rhs": "handle returned by open_db_file or provided hdl",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-60, various"
      },
      {
        "lhs": "write result res",
        "rhs": "TEE_WriteObjectData(db_hdl, buffer, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64,399,456,563,693"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63",
        "evidence": "open_db_file result checked and TEE_Panic on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "TEE_WriteObjectData result checked and TEE_Panic on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Buffer argument token->db_main (may include credential hashes derived from REE PIN) is passed into write API; binding of caller-owned data recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Pointer 'ptr' passed as buffer to write API; origin may include persistent object list derived from TA data, binding recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "token->db_objs passed into write API (contains object UUIDs); binding of TA-private structure recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "obj->attributes (attributes blob) passed into write API; may include sensitive attributes derived from REE PINs, binding recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "db_objs structure passed into write API to persist empty list; binding recorded for persistent update.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=sizeof(*db_objs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "safe",
      "why": "Writes TEE-private token->db_main to persistent TA storage; data includes credential hashes derived from REE PIN but destination is TEE-private (not REE-visible) and write size is a fixed sizeof(*token->db_main) with no tainted length, so no unencrypted REE leak or size-based overflow at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The write at line 64 persists TEE-private data to TA-managed persistent storage (dst_region TEE-private), not REE-visible memory; size is fixed and not derived from untrusted input, and prior checks/sanitizers ensure correctness.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "persistent_token.c:59-63",
      "evidence": "open_db_file result checked and TEE_Panic on error"
    },
    {
      "type": "error_check",
      "location": "persistent_token.c:64-69",
      "evidence": "TEE_WriteObjectData result checked and TEE_Panic on error"
    },
    {
      "type": "bounds_check",
      "location": "pkcs11_token.c:1044-1046",
      "evidence": "new_pin_size checked against PKCS11_TOKEN_PIN_SIZE_MIN/MAX before hashing"
    }
  ],
  "argument_safety": [
    {
      "arg": "token->db_main",
      "why_safe": "Size written is sizeof(*token->db_main) (statically determined); content includes hashes but not directly written to REE",
      "evidence": "persistent_token.c:64"
    },
    {
      "arg": "db_hdl",
      "why_safe": "Handle obtained via open_db_file with error checked; write result is checked",
      "evidence": "persistent_token.c:59-66"
    }
  ],
  "residual_risks": [
    "line 366: local enum rc copied into caller-provided memref.buffer (REE-visible) via TEE_MemMove — potential REE-visible write of TA data (recorded as structural risk)",
    "DB contents include credential hashes derived from REE PIN; while persisted to TEE-private storage here, improper future export or mishandling could risk disclosure"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "destination is TEE-private persistent object, not REE-visible",
      "write size is fixed sizeof(*token->db_main), not derived from untrusted input",
      "pre-write error checks present"
    ],
    "negative_indicators": [
      "token->db_main contains credential material derived from REE-supplied PIN (sensitivity)",
      "dst_sz for persistent storage consumer not explicitly enumerated (recorded as unknown)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "TEE_WriteObjectData at line 64 persists TA-private data to TA-managed persistent storage; this is not a direct unencrypted REE output and the write uses a fixed size, so it is not classified as vulnerable under the memory-safety or unencrypted-output policies. However, sensitive credential material is being written to persistent storage inside the TA and structural risks remain (possible future export or earlier REE-visible writes).",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "PIN buffer from REE memref is passed into set_pin (credential material from REE bound into TA-private structures).",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "TEE_WriteObjectData persists token->db_main which contains credential hashes derived from REE PIN; recorded as TEE-private persistent write of sensitive data.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #202: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> set_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_set_pinset_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 54.64秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

詳細: Although REE-provided PIN data flows into TA state that is persisted, the sink writes into a TEE persistent object rather than REE memory; this does not satisfy the policy promotion conditions for 'unencrypted_output', so it is not classified as a vulnerable external leak at this sink line.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buf",
      "size",
      "token->db_main"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl) at caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59"
      },
      {
        "lhs": "buf (write input)",
        "rhs": "token->db_main passed by caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-65"
      },
      {
        "lhs": "size (write length)",
        "rhs": "sizeof(*token->db_main) provided by caller",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-65"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:60-63",
        "evidence": "open_db_file result checked and TEE_Panic on error before write"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_hdl' is produced by open_db_file and passed into TEE_WriteObjectData; origin is TEE object handle used for persistent storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes token->db_main (contains PIN hashes/flags) from TA memory into persistent object via TEE_WriteObjectData; sensitive credential material persisted.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "safe",
      "why": "Writes TA-private token->db_main into persistent object handle; destination is persistent TEE object (TEE-private) not directly REE-visible, so does not meet promotion criteria for unencrypted_output.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "params[0].memref.buffer (REE) -> pin/pin_size -> hashed and stored",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init(&ctrlargs) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1267",
        "serialargs_get_ptr -> pin @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1285",
        "set_pin(session, pin, pin_size, ...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1306",
        "hash_pin(..., new_pin, new_pin_size, ...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1050",
        "update_persistent_db(token) -> TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      ],
      "sink": "TEE_WriteObjectData writes token->db_main to persistent storage"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies PIN bytes via REE memref to TA entry call",
        "No additional access controls beyond session checks"
      ],
      "attack_scenario": "Malicious REE client provides PIN data which is processed and persisted (hashed) by TA; attacker cannot directly cause an unencrypted leak from this call alone.",
      "impact": "Credential material (PIN hashes/flags) is persisted in token DB; confidentiality risk if persistent storage is later exposed outside TEE."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "update_persistent_db:64",
        "recommendation": "Ensure persistent object ACLs restrict REE access and consider encrypting sensitive DB fields before persistent write."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Concrete write of token->db_main via TEE_WriteObjectData at line 64",
        "Upstream taint from REE-provided params flows into pin/new_pin"
      ],
      "negative_indicators": [
        "Destination is persistent TEE object (not REE-visible) so not direct REE leak",
        "Size argument is sizeof(*token->db_main) (not attacker-controlled)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Although REE-provided PIN data flows into TA state that is persisted, the sink writes into a TEE persistent object rather than REE memory; this does not satisfy the policy promotion conditions for 'unencrypted_output', so it is not classified as a vulnerable external leak at this sink line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The write at line 64 persists TA-private state into a TEE object handle rather than directly exposing sensitive plaintext to REE, and the size is not attacker-controlled.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "update_persistent_db:59-63",
      "evidence": "open_db_file result checked and TEE_Panic on error"
    },
    {
      "type": "error_check",
      "location": "update_persistent_db:66-69",
      "evidence": "TEE_WriteObjectData result checked and TEE_Panic on error"
    },
    {
      "type": "bounds_check",
      "location": "set_pin:1044-1046",
      "evidence": "new_pin_size validated against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    }
  ],
  "argument_safety": [
    {
      "arg": "db_hdl",
      "why_safe": "Validated/obtained via open_db_file and checked for errors before write",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:59-63"
    },
    {
      "arg": "size",
      "why_safe": "Caller provides sizeof(*token->db_main), not attacker-controlled length",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-65"
    }
  ],
  "residual_risks": [
    "64: persistent storage of credential-derived data may be sensitive if persistent object ACLs or device compromise expose it outside TEE"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct dataflow from REE params to persisted DB documented in propagation path",
      "Explicit write call observed at target sink line"
    ],
    "negative_indicators": [
      "Destination is TEE persistent object (not REE-visible)",
      "No attacker-controlled size used for this write"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "The sink writes sensitive token DB state but does so into TEE-managed persistent storage with checked handle acquisition; under the given promotion rules this is not an unencrypted REE output, so marked not vulnerable at this line while noting structural sensitivity.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Persists token->db_main (contains PIN hashes and flags) to persistent storage; sensitive credential material is being written.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1285,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE buffer to obtain pointers into that buffer via serialargs_get_ptr; relies on serialargs validation but semantic validation is limited.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    }
  ]
}
フロー #203: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> check_so_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_set_pincheck_so_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 70.55秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

安全判定理由: The sink writes TA-private state to TEE persistent storage (not REE-visible); no tainted size/overflow evidence and sanitizers check write results, so no direct tainted→REE unencrypted output or memory-safety violation at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buffer",
      "size",
      "res"
    ],
    "propagation": [
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, buffer, size) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, ptr, size_expr) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-69",
        "evidence": "checks res and calls TEE_Panic on error"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:693-695",
        "evidence": "checks res and panics on error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Persists token->db_main (contains PIN/hash/counters) to storage via TEE_WriteObjectData; sensitive credential material is written to persistent storage.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: data pointer 'token->db_main' originates from TA token state (contains PIN-related fields) passed into writer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Persists object list structure (ptr) to storage; written blob size depends on ptr->count which may reflect TA state influenced by REE inputs.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'ptr' data pointer aliases TA-managed persistent objects structure passed into writer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes token->db_objs (object listing with UUIDs) to persistent storage; TA-private metadata persisted.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'token->db_objs' pointer passed to writer aliases TA-managed structure.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes object attributes (obj->attributes) of size based on attrs_size to storage; persisted attribute blobs may contain sensitive metadata.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'obj->attributes' pointer passed to writer aliases TA object attributes memory.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes db_objs (possibly empty) to persistent storage; finalizing persistent state via writer.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=sizeof(*db_objs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_objs' pointer passed to writer aliases TA-managed persistent object header.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "not_applicable",
      "why": "Writes TA-private token->db_main (contains PIN/hash/counters) to TEE persistent storage; destination is TEE-private (not REE-visible) so promotion to unencrypted_output does not apply and no bounds/size taint indicates memory-safety issue.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The sink writes TA-private state to TEE persistent storage (not REE-visible); no tainted size/overflow evidence and sanitizers check write results, so no direct tainted→REE unencrypted output or memory-safety violation at this line.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "update_persistent_db:59-69",
      "evidence": "checks res from open_db_file and TEE_WriteObjectData and calls TEE_Panic on error"
    }
  ],
  "argument_safety": [
    {
      "arg": "token->db_main",
      "why_safe": "Written by TA to TEE persistent storage (not exposed to REE at this call); size is sizeof(*token->db_main), a fixed compile-time size",
      "evidence": "persistent_token.c:64"
    }
  ],
  "residual_risks": [
    "64: sensitive credential material (PIN hash/salt/counters) persisted to storage inside TEE; although not written to REE, persisting secrets increases attack surface if storage is later exported or misconfigured"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "token->db_main contains PIN-related fields (so sensitive)",
      "TEE_WriteObjectData persists the whole structure"
    ],
    "negative_indicators": [
      "Destination is TEE persistent storage (not REE-visible)",
      "Write result is checked and TEE_Panic on error"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No vulnerable tainted→REE write or size/overflow issue at this line: data is TA-private and written to TEE storage with fixed size; main concern is sensitive material persistence (structural risk) rather than a direct sink vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Persists token->db_main (contains PIN/hash/counters) to persistent storage; sensitive credential material is written within TEE.",
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #204: TA_InvokeCommandEntryPoint -> entry_ck_login -> check_so_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_logincheck_so_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 56.87秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

詳細: The write at line 64 persists TA-private credential-related data to TA-owned storage; it does not copy TA secrets to REE-visible memory, so it does not meet the criteria for 'unencrypted_output'. Memory-safety issues at this call are not evident. Structural risks from upstream (tainted pin/pin_size, weak input validation) remain but do not make this sink a direct information leak.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buffer",
      "size",
      "res",
      "persistent storage"
    ],
    "propagation": [
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, buffer, size) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      },
      {
        "lhs": "persistent storage contents",
        "rhs": "buffer (written via TEE_WriteObjectData)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64-66"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: data buffer argument originates from token->db_main (credential-related structure) and is written to persistent storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: db_hdl originates from open_db_file(token,&db_hdl) and is used as destination handle for write; origin tied to token persistent storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=?,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Write operation persists credential-related fields (PIN counters/hashes); persisting sensitive state to storage.",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "not_applicable",
      "why": "Writes TA-private token->db_main into TA persistent storage (dst is TEE-private), not a REE-visible sink; no evidence of unencrypted REE exfiltration at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "REE-provided params -> serialargs -> pin/pin_size/session",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs_init -> ctrlargs @ pkcs11_token.c:1414",
        "ctrlargs -> serialargs_get_ptr(pin, pin_size) @ pkcs11_token.c:1428",
        "session->token -> token->db_main modified -> update_persistent_db(token) @ pkcs11_token.c:1164",
        "token->db_main -> TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) @ persistent_token.c:64"
      ],
      "sink": "TEE_WriteObjectData persists token->db_main to TA storage"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies crafted REE params to control pin/pin_size/session handle",
        "Successful login attempts or failures cause token->db_main state changes"
      ],
      "attack_scenario": "An attacker-controlled REE client influences session/token state (PIN counters/flags) which the TA persists; no direct REE data leak via this sink.",
      "impact": "Corruption or manipulation of persistent token state (PIN counters/flags); potential denial-of-service (PIN lockout) or state corruption but not REE data exfiltration via this call."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "entry_ck_login:1411-1412",
        "recommendation": "Ensure stronger validation of session handles derived from REE and strictly validate pin_size ranges before consumption"
      },
      {
        "type": "range_check",
        "location": "entry_ck_login:1428",
        "recommendation": "Enforce explicit limits on pin_size and reject out-of-range values before passing to serialargs_get_ptr"
      },
      {
        "type": "access_control",
        "location": "update_persistent_db:59-66",
        "recommendation": "Audit open_db_file/write path for proper handles and consider integrity checks on persisted content"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit propagation from REE params into pin/pin_size and session",
        "token->db_main contains credential-related fields (PIN counters/hashes) written to storage"
      ],
      "negative_indicators": [
        "Destination of TEE_WriteObjectData is TA persistent storage (TEE-private), not REE-visible",
        "There are early argument/type checks (ptypes == exp_pt) and serialargs_remaining_bytes check"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The write at line 64 persists TA-private credential-related data to TA-owned storage; it does not copy TA secrets to REE-visible memory, so it does not meet the criteria for 'unencrypted_output'. Memory-safety issues at this call are not evident. Structural risks from upstream (tainted pin/pin_size, weak input validation) remain but do not make this sink a direct information leak.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_WriteObjectData at line 64 writes to TA persistent storage (TEE-private); although upstream inputs are REE-tainted, there is no evidence this call exports secrets to REE or performs an unsafe sized write to REE-visible memory.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_ck_login:1411-1412",
      "evidence": "if (!client || ptypes != exp_pt) return PKCS11_CKR_ARGUMENTS_BAD"
    },
    {
      "type": "consumption_check",
      "location": "entry_ck_login:1432-1433",
      "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
    }
  ],
  "argument_safety": [
    {
      "arg": "token (update_persistent_db token)",
      "why_safe": "Used as source for TA-private persistent write, not directly exposed to REE; integrity of token depends on earlier validation",
      "evidence": "check_so_pin/session assignment: pkcs11_token.c:1416, persistent write: persistent_token.c:64"
    }
  ],
  "residual_risks": [
    "Upstream weak_input_validation: REE-controlled pin/pin_size propagate into TA credential checks and may alter persisted state (e.g., force PIN lockout); consider hardening input validation",
    "Call-site bindings: params and pin originate from REE-visible memrefs (see entry_ck_login and check_so_pin analyses)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Clear tainted flow from REE into token state that is persisted",
      "Persisted structure contains credential-related fields"
    ],
    "negative_indicators": [
      "Persisted data remains within TEE private storage (no REE-visible sink at this line)",
      "Some parameter/type checks and remaining-bytes checks exist upstream"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Not a vulnerability at this sink line because requirements for unencrypted REE output are not met; primary concerns are upstream input validation and state integrity which are reported as structural risks.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1428,
      "function": "entry_ck_login",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "pin pointer obtained from REE-controlled serialargs_get_ptr using pin_size; pin is a credential used in verify_pin.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1164,
      "function": "check_so_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=unknown,dst_sz=sizeof(*token->db_main)"
        ]
      },
      "why": "update_persistent_db called with token derived from session which was populated from REE-provided handle; persisted state influenced by REE inputs.",
      "code_excerpt": "update_persistent_db(token);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes credential-related token->db_main to persistent storage; sensitive TA state persisted even though not exposed to REE here.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #205: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> check_user_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_set_pincheck_user_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 67.76秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

詳細: The write at line 64 persists TA-private state to TEE storage and is protected by return checks; it does not transfer secrets to REE, so it is not classified as unencrypted_output. However, upstream handling of REE-provided lengths and buffers presents structural risks (possible corruption or unintended persistent state changes).

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "buf",
      "size",
      "res"
    ],
    "propagation": [
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, buf, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      }
    ],
    "sanitizers": [
      {
        "kind": "return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:66-69",
        "evidence": "res checked and TEE_Panic on failure after TEE_WriteObjectData"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buffer 'token->db_main' (TA-private persistent DB state, may contain credential fields) passed into TEE_WriteObjectData for persistence.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buffer 'ptr' (token persistent objects blob) passed to TEE_WriteObjectData to store objects metadata persistently.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buffer 'token->db_objs' (TA-private object list including UUIDs) written persistently via TEE_WriteObjectData.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buffer 'obj->attributes' (object attributes, may include sensitive attributes) written to storage via TEE_WriteObjectData.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=sizeof(struct obj_attrs) + obj->attributes->attrs_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: buffer 'db_objs' (empty/reset object list) persisted via TEE_WriteObjectData after initialization.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=sizeof(*db_objs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "safe",
      "why": "Writes TA-private token->db_main into TEE persistent storage (not REE-visible); caller-validated open/write results and code panics on failure.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TA-private token state (token->db_main) possibly influenced earlier by REE-provided pin data",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs (entry_ck_set_pin) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1267",
        "serialargs_get_ptr -> old_pin/pin (entry_ck_set_pin) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1281-1285",
        "token->db_main modified (check_user_pin) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:1214-1216",
        "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      ],
      "sink": "TEE_WriteObjectData persists TA-private DB blob to secure storage"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls REE-provided params memref buffer passed into TA entry",
        "Attacker can supply crafted pin sizes and contents"
      ],
      "attack_scenario": "Attacker supplies malformed/large values in REE-visible memref to influence TA state; however persistent write targets TEE storage, not REE, limiting direct exfiltration via this call.",
      "impact": "Low: corruption or unintended persistent state changes inside TA; not immediate secret leakage to REE via this call"
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "entry_ck_set_pin:1273-1279",
        "recommendation": "Enforce semantic limits on pin_size/old_pin_size (max allowed) before accepting and use explicit range checks against ctrl->memref.size"
      },
      {
        "type": "range_check",
        "location": "serialargs_get_ptr:1281-1285",
        "recommendation": "Validate that requested pointer ranges are within ctrlargs buffer and that sizes are reasonable to avoid internal corruption"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_WriteObjectData target is TEE-private persistent storage (not REE-visible)",
        "Code checks TEE_WriteObjectData return and panics on failure"
      ],
      "negative_indicators": [
        "token->db_main is influenced by earlier logic handling REE-provided pin data",
        "serialargs uses REE-supplied length fields to compute pointer ranges"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The write at line 64 persists TA-private state to TEE storage and is protected by return checks; it does not transfer secrets to REE, so it is not classified as unencrypted_output. However, upstream handling of REE-provided lengths and buffers presents structural risks (possible corruption or unintended persistent state changes).",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_WriteObjectData at line 64 writes to TEE persistent storage (TEE-private) with error checks; no evidence of REE-visible plaintext exfiltration at this call.",
  "effective_sanitizers": [
    {
      "type": "return_check",
      "location": "update_persistent_db:64-69",
      "evidence": "res checked and TEE_Panic on failure"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_set_pin:1248-1255",
      "evidence": "ptypes compared to exp_pt at function start"
    }
  ],
  "argument_safety": [
    {
      "arg": "token",
      "why_safe": "token points to TA-private state and is not directly REE-visible when passed to TEE_WriteObjectData",
      "evidence": "persistent_token.c:64"
    }
  ],
  "residual_risks": [
    "line 366: TEE_MemMove copies rc into params[0].memref.buffer (REE-visible) — potential unencrypted_output to REE (structural risk reported below)",
    "serialargs_get_ptr uses REE-supplied sizes (lines ~1273-1285) to obtain pointers into shared buffer — potential weak_input_validation leading to internal corruption"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "sink writes to TEE storage (not REE)",
      "write return is checked and panics on failure"
    ],
    "negative_indicators": [
      "upstream REE-controlled buffers influence TA state that is persisted",
      "some size/semantic checks rely on serialargs but semantic limits not enforced"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 64 is not a vulnerability for unencrypted REE output because destination is TEE persistent storage and the write is checked; structural issues upstream remain and should be mitigated.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes read from REE-provided buffer (old_pin_size) to obtain pointers into that buffer via serialargs_get_ptr without stronger semantic validation.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 196,
      "function": "entry_ck_set_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=unknown,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: callee param 'params' aliases caller memref (shared/REE-visible buffer) passed into helper.",
      "code_excerpt": "rc = entry_ck_set_pin(client, ptypes, params);"
    }
  ]
}
フロー #206: TA_InvokeCommandEntryPoint -> entry_ck_login -> check_user_pin -> update_persistent_db -> TEE_WriteObjectData
安全
TA_InvokeCommandEntryPointentry_ck_logincheck_user_pinupdate_persistent_dbTEE_WriteObjectData

実行時間: 79.65秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64

パラメータインデックス: 1

解析結果

詳細: The call at line 64 writes TA-private data into TEE persistent storage (dst is TEE-private), so it does not meet criteria for `unencrypted_output`. No size/bounds violation is evident at this site, so not classified as vulnerable for disclosure or memory-safety.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_db at lines [64, 399, 456, 563, 693]:
-- Call #1 at line 64 --
62: TEE_Panic(0);
63: }
64: >>> res = TEE_WriteObjectData(db_hdl, token->db_main,
65: sizeof(*token->db_main));
66:     	if (res) {
-- Call #2 at line 399 --
397:     		    count * sizeof(TEE_UUID));
398:     
399: >>> 	res = TEE_WriteObjectData(db_hdl, ptr,
400:     				  sizeof(struct token_persistent_objs) +
401:     				  ptr->count * sizeof(TEE_UUID));
-- Call #3 at line 456 --
454:     	token->db_objs->count++;
455:     
456: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_objs,
457:     				  sizeof(struct token_persistent_objs) +
458:     				  token->db_objs->count * sizeof(TEE_UUID));
-- Call #4 at line 563 --
561:     	size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:     
563: >>> 	res = TEE_WriteObjectData(hdl, obj->attributes, size);
564:     	if (res)
565:     		goto out;
-- Call #5 at line 693 --
691:     
692:     		db_objs->count = 0;
693: >>> 		res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694:     		if (res)
695:     			TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 64:
59:     	res = open_db_file(token, &db_hdl);
60:     	if (res) {
61:     		EMSG("Failed to open token persistent db: %#"PRIx32, res);
62:     		TEE_Panic(0);
63:     	}
64: >>> 	res = TEE_WriteObjectData(db_hdl, token->db_main,
65:     				  sizeof(*token->db_main));
66:     	if (res) {
67:     		EMSG("Failed to write to token persistent db: %#"PRIx32, res);
68:     		TEE_Panic(0);
69:     	}

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_WriteObjectData",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "db_hdl",
      "ptr",
      "token->db_main",
      "token->db_objs",
      "obj->attributes",
      "size",
      "res"
    ],
    "propagation": [
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:64"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:399"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:456"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(hdl, obj->attributes, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563"
      },
      {
        "lhs": "res",
        "rhs": "TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:693"
      }
    ],
    "sanitizers": [
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:66-69",
        "evidence": "if (res) { EMSG(...); TEE_Panic(0); } after TEE_WriteObjectData"
      },
      {
        "kind": "error_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:393-401",
        "evidence": "caller checks res after TEE_WriteObjectData and handles error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_hdl' is handle returned by open_db_file (TEE object handle, TA-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'token->db_main' buffer (TA-private) written into persistent object; contains sensitive token state.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_hdl' is TEE object handle used for write (TEE-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 399,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'ptr' buffer (TA-private persistent objs) is written to storage; size derived from ptr->count.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, ptr, sizeof(struct token_persistent_objs) + ptr->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_hdl' object handle used for write (TEE-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'token->db_objs' buffer (TA-private) written; size depends on token->db_objs->count.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'hdl' is a TEE object handle (TEE-private) used for write.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'obj->attributes' buffer (TA-private) written to object; size from obj->attributes->attrs_size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_hdl' handle used for final write (TEE-private origin).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Call-site binding: 'db_objs' buffer (TA-private) written to persistent storage; contains persistent object metadata.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=sizeof(*db_objs),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [64]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [64] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      64
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "status": "safe",
      "why": "Writes TA-private token->db_main into a TEE persistent object (dst_region is TEE-private), not being copied to REE; no evidence of size overflow at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided memref (pin) and TA-internal token state",
      "propagation_path": [
        "params[0].memref.buffer -> serialargs (pkcs11_token.c:1414)",
        "serialargs_get_ptr -> pin (pkcs11_token.c:1428)",
        "check_user_pin(pin,pin_size) (pkcs11_token.c:1487)",
        "token->db_main modified and update_persistent_db(token) (pkcs11_token.c:1223)",
        "TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main)) (persistent_token.c:64)"
      ],
      "sink": "TEE_WriteObjectData writes TA-private structure into TEE persistent storage"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls params[0] memref to supply a crafted pin and pin_size (REE input).",
        "No direct REE-visible write occurs at this sink."
      ],
      "attack_scenario": "Attacker supplies crafted PIN to influence TA state; persistent write stores TA-private state but remains within TEE object storage.",
      "impact": "Possible corruption of TA persistent state or denial-of-service if attacker manipulates inputs; no direct plaintext disclosure to REE at this sink."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "entry_ck_login:1428",
        "recommendation": "Validate pin_size against ctrl->memref.size and enforce maximum allowed PIN length before using serialargs_get_ptr."
      },
      {
        "type": "range_check",
        "location": "check_user_pin:1205",
        "recommendation": "Verify pin content and size constraints prior to calling verify_pin to avoid excessive processing or state changes from crafted inputs."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Sink writes TA-private structure into TEE object (not REE-visible).",
        "Write size is sizeof(*token->db_main) (fixed) and not derived from untrusted length at this call site."
      ],
      "negative_indicators": [
        "Upstream inputs (pin, pin_size) are REE-controlled and weakly validated, enabling state changes that trigger writes.",
        "TEE_WriteObjectData errors are handled by TEE_Panic, which may have availability implications."
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The call at line 64 writes TA-private data into TEE persistent storage (dst is TEE-private), so it does not meet criteria for `unencrypted_output`. No size/bounds violation is evident at this site, so not classified as vulnerable for disclosure or memory-safety.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The target sink writes to TEE-private persistent storage with a fixed-size write and is not copying TA secrets to REE-visible memory; upstream weak input validation is a concern but does not make this sink line itself a disclosure or overflow.",
  "effective_sanitizers": [
    {
      "type": "error_check",
      "location": "persistent_token.c:64-69",
      "evidence": "if (res) { EMSG(...); TEE_Panic(0); }"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1411-1412",
      "evidence": "if (!client || ptypes != exp_pt) return PKCS11_CKR_ARGUMENTS_BAD"
    },
    {
      "type": "consumption_check",
      "location": "pkcs11_token.c:1432-1433",
      "evidence": "if (serialargs_remaining_bytes(&ctrlargs)) return PKCS11_CKR_ARGUMENTS_BAD"
    }
  ],
  "argument_safety": [
    {
      "arg": "token (update_persistent_db)",
      "why_safe": "Originates from TA-internal session/token structures (TA-private) not directly supplied as REE buffer to this call.",
      "evidence": "pkcs11_token.c:1192-1194 / persistent_token.c:64"
    },
    {
      "arg": "db_hdl",
      "why_safe": "Created by open_db_file and used as TEE object handle (TEE-private).",
      "evidence": "persistent_token.c:59-63"
    }
  ],
  "residual_risks": [
    "Upstream weak_input_validation: REE-controlled pin and pin_size reach verify_pin and can change token state leading to persistent writes (see pkcs11_token.c:1428,1205)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed-size write sizeof(*token->db_main) at sink site.",
      "Destination is TEE persistent object (not REE-visible)."
    ],
    "negative_indicators": [
      "Upstream tainted inputs and limited validation for pin/pin_size.",
      "Some region provenance is 'unknown' for caller-derived handles."
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 64 is not classified as vulnerable because it performs a fixed-size write to TEE-private storage; the primary risks are upstream validation issues and state corruption, which are reported as structural/residual risks rather than an immediate disclosure or memory-safety vulnerability at this sink.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1428,
      "function": "entry_ck_login",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "Tainted pin pointer obtained from serialargs_get_ptr using REE-controlled pin_size without strict local bounds/content validation.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1205,
      "function": "check_user_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "Tainted pin and pin_size passed into verify_pin without additional local validation before use.",
      "code_excerpt": "rc = verify_pin(PKCS11_CKU_USER, pin, pin_size, token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 64,
      "function": "update_persistent_db",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*token->db_main),src_sz=sizeof(*token->db_main),dst_sz=unknown"
        ]
      },
      "why": "Writes TA-private token->db_main into persistent TEE object; contains sensitive token state but remains in TEE storage.",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_main, sizeof(*token->db_main));"
    }
  ]
}
フロー #207: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> hash_pin -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_ck_token_initializehash_pinTEE_GenerateRandom

実行時間: 113.72秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105

パラメータインデックス: 0

解析結果

詳細: Line 105 invokes RNG to fill a TA-private local; RNG output is non-sensitive by default and size matches, so no tainted→dangerous-sink condition holds for information disclosure or memory-safety at this line.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: hash_pin
プロンプト 中間 (hash_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “hash_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_ck_token_initialize at lines [928, 1050, 1062]:
-- Call #1 at line 928 --
926: return PKCS11_CKR_ARGUMENTS_BAD;
927:
928: >>> rc = hash_pin(PKCS11_CKU_SO, pin, pin_size,
929: &token->db_main->so_pin_salt,
930: token->db_main->so_pin_hash);
-- Call #2 at line 1050 --
1048:     	switch (user_type) {
1049:     	case PKCS11_CKU_SO:
1050: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1051:     			      &token->db_main->so_pin_salt,
1052:     			      token->db_main->so_pin_hash);
-- Call #3 at line 1062 --
1060:     		break;
1061:     	case PKCS11_CKU_USER:
1062: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1063:     			      &token->db_main->user_pin_salt,
1064:     			      token->db_main->user_pin_hash);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

98: enum pkcs11_rc hash_pin(enum pkcs11_user_type user, const uint8_t *pin,
99: size_t pin_size, uint32_t *salt,
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101: {
102: enum pkcs11_rc rc = PKCS11_CKR_OK;
103: uint32_t s = 0;
104:
105: TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
108:
109: rc = do_hash(user, pin, pin_size, s, hash);
110: if (!rc)
111: *salt = s;
112: return rc;
113: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"hash_pin",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (hash_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": [
      "user",
      "pin",
      "pin_size",
      "salt",
      "hash",
      "s",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "s",
        "rhs": "TEE_GenerateRandom(&s, sizeof(s))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105-107"
      },
      {
        "lhs": "rc",
        "rhs": "do_hash(user, pin, pin_size, s, hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:109-111"
      },
      {
        "lhs": "*salt",
        "rhs": "s (assigned on successful do_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:110-111"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:924-926",
        "evidence": "caller checks pin_size against PKCS11_TOKEN_PIN_SIZE_MIN/MAX before calling hash_pin"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 928,
      "function": "hash_pin",
      "rule": "weak_input_validation",
      "why": "Caller-provided pin pointer (from serialargs) passed into hash_pin; pin is REE-originated and used with pin_size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = hash_pin(PKCS11_CKU_SO, pin, pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "Salt pointer argument is TA-private storage passed into hash_pin (bound to &token->db_main->so_pin_salt).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=4,src_sz=unknown,dst_sz=4"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "Hash output buffer argument is TA-private storage passed into hash_pin (token persistent hash storage).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=TEE_MAX_HASH_SIZE,src_sz=unknown,dst_sz=TEE_MAX_HASH_SIZE"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from hash_pin at lines [105, 322]:
-- Call #1 at line 105 --
103: uint32_t s = 0;
104:
105: >>> TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
-- Call #2 at line 322 --
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 105:
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101:     {
102:     	enum pkcs11_rc rc = PKCS11_CKR_OK;
103:     	uint32_t s = 0;
104:     
105: >>> 	TEE_GenerateRandom(&s, sizeof(s));
106:     	if (!s)
107:     		s++;
108:     
109:     	rc = do_hash(user, pin, pin_size, s, hash);
110:     	if (!rc)

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GenerateRandom",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "buffer",
      "size"
    ],
    "propagation": [
      {
        "lhs": "buffer",
        "rhs": "random bytes written into provided buffer by TEE_GenerateRandom",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105"
      },
      {
        "lhs": "obj->uuid",
        "rhs": "random bytes written into obj->uuid by TEE_GenerateRandom",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 105,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Call-site binding: local variable 's' (TA-private) passed as buffer to TEE_GenerateRandom; RNG output written into TA storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(s)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(&s, sizeof(s));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Call-site binding: obj->uuid (persistent object field, TA-private) passed as buffer to TEE_GenerateRandom; RNG fills UUID in-place.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [105]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [105] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      105
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 105,
      "function": "hash_pin",
      "sink_function": "TEE_GenerateRandom",
      "status": "safe",
      "why": "TEE_GenerateRandom writes random bytes into a TA-private local 's' of size sizeof(s); data is non-sensitive random by default and there is a bounds-correct size match.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided pin (REE-visible) -> serialargs -> pin pointer",
      "propagation_path": [
        "params[0].memref.buffer -> ctrlargs buffer @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:838",
        "ctrlargs -> pin (pointer into ctrl buffer) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:852",
        "pin -> hash_pin(pin,pin_size,...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c:928",
        "hash_pin calls TEE_GenerateRandom(&s, sizeof(s)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105"
      ],
      "sink": "TEE_GenerateRandom writes into TA-private buffer 's'"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls params[0].memref.buffer contents (REE)",
        "no additional flaws in RNG usage elsewhere"
      ],
      "attack_scenario": "Attacker-controlled input reaches TA hashing logic, but TEE_GenerateRandom invocation at line 105 produces non-sensitive random salt in TA memory — no direct leak at this line.",
      "impact": "None from this line alone; random salt generation into TA-private storage is expected behavior."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "entry_ck_token_initialize:835-836",
        "recommendation": "Ensure TEE_PARAM_TYPES checks cover expected memref direction/size semantics and log or reject unexpected memref attributes."
      },
      {
        "type": "bounds_check",
        "location": "serialargs_get_ptr:852",
        "recommendation": "Ensure serialargs_get_ptr enforces that returned pointer stays within ctrl->memref.buffer bounds and is not later used beyond its lifetime."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_GenerateRandom target buffer is TA-private local 's' and size matches sizeof(s)",
        "Caller validated pin_size limits before hash_pin"
      ],
      "negative_indicators": [
        "pin originates from REE and is used downstream; other lines perform copies into REE (e.g., rc -> params[0].memref.buffer)",
        "some pointer bindings originate from shared memrefs (structural risks exist)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Line 105 invokes RNG to fill a TA-private local; RNG output is non-sensitive by default and size matches, so no tainted→dangerous-sink condition holds for information disclosure or memory-safety at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "TEE_GenerateRandom writes to TA-private storage with matching size and the generated bytes are treated as non-sensitive random; sanitizers and bounds checks exist elsewhere for related inputs.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "entry_ck_token_initialize:924-926",
      "evidence": "pin_size compared against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    },
    {
      "type": "type_validation",
      "location": "entry_ck_token_initialize:819-836",
      "evidence": "exp_pt compared against ptypes; ptypes mismatch returns error"
    },
    {
      "type": "bounds_check",
      "location": "entry_ck_token_initialize:856-857",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked -> error if leftover"
    }
  ],
  "argument_safety": [
    {
      "arg": "s (local salt)",
      "why_safe": "allocated local uint32_t, written with sizeof(s)",
      "evidence": "persistent_token.c:103-107"
    },
    {
      "arg": "pin (pointer from serialargs)",
      "why_safe": "pin_size validated by caller before hash_pin; however pointer is from REE-visible memref so caller-side checks matter",
      "evidence": "pkcs11_token.c:924-931 and persistent_token.c:98-105"
    }
  ],
  "residual_risks": [
    "serialargs_get_ptr returns a pointer into REE-shared memref (pkcs11_token.c:852) — downstream uses of that pointer require careful containment checks",
    "TEE_MemMove of rc into params[0].memref.buffer (entry.c:366) writes TA data into REE-visible buffer; ensure rc does not leak sensitive data in other code paths"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "direct evidence that buffer and size match at line 105",
      "policy default treats RNG output as non-sensitive"
    ],
    "negative_indicators": [
      "some upstream data originates from REE and flows into TA (structural risks exist)",
      "promotion to unencrypted_output prevented by dst region not being REE-visible at this line"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No tainted sensitive data is written to an REE-visible sink at line 105; RNG writes into TA-private storage with correct size, so classify as not vulnerable. Structural risks elsewhere are reported separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 190,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=?,src_sz=params[0].memref.size,dst_sz=unknown"
        ]
      },
      "why": "Call-site binding: params (caller-provided memref buffer) aliased into callee parameter (ctrl) — shared REE buffer passed to TA.",
      "code_excerpt": "rc = entry_ck_token_initialize(ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 852,
      "function": "entry_ck_token_initialize",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=pin_size"
        ]
      },
      "why": "serialargs_get_ptr returns a pointer into caller-controlled memref buffer (pin) using pin_size from REE without further containment proof.",
      "code_excerpt": "rc = serialargs_get_ptr(&ctrlargs, &pin, pin_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 928,
      "function": "hash_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=pin_size"
        ]
      },
      "why": "Caller-provided pin pointer (from serialargs) passed into hash_pin; pin is REE-originated and used with pin_size.",
      "code_excerpt": "rc = hash_pin(PKCS11_CKU_SO, pin, pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 105,
      "function": "TEE_GenerateRandom",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(s)"
        ]
      },
      "why": "Call-site binding: local variable 's' (TA-private) passed as buffer to TEE_GenerateRandom; RNG output written into TA storage.",
      "code_excerpt": "TEE_GenerateRandom(&s, sizeof(s));"
    }
  ]
}
フロー #208: TA_InvokeCommandEntryPoint -> entry_ck_init_pin -> set_pin -> hash_pin -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_ck_init_pinset_pinhash_pinTEE_GenerateRandom

実行時間: 99.16秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105

パラメータインデックス: 0

解析結果

安全判定理由: TEE_GenerateRandom at line 105 writes random bytes into a TEE-private stack variable derived inside the TA; the destination is not REE-visible and the RNG input is not REE-tainted, so no tainted data is leaked.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: hash_pin
プロンプト 中間 (hash_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “hash_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_pin at lines [1050, 1062]:
-- Call #1 at line 1050 --
1048:     	switch (user_type) {
1049:     	case PKCS11_CKU_SO:
1050: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1051:     			      &token->db_main->so_pin_salt,
1052:     			      token->db_main->so_pin_hash);
-- Call #2 at line 1062 --
1060:     		break;
1061:     	case PKCS11_CKU_USER:
1062: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1063:     			      &token->db_main->user_pin_salt,
1064:     			      token->db_main->user_pin_hash);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

98: enum pkcs11_rc hash_pin(enum pkcs11_user_type user, const uint8_t *pin,
99: size_t pin_size, uint32_t *salt,
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101: {
102: enum pkcs11_rc rc = PKCS11_CKR_OK;
103: uint32_t s = 0;
104:
105: TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
108:
109: rc = do_hash(user, pin, pin_size, s, hash);
110: if (!rc)
111: *salt = s;
112: return rc;
113: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"hash_pin",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (hash_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": [
      "user",
      "pin",
      "pin_size",
      "salt",
      "hash",
      "s"
    ],
    "propagation": [
      {
        "lhs": "s",
        "rhs": "TEE_GenerateRandom(&s, sizeof(s))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105-106"
      },
      {
        "lhs": "s (non-zero)",
        "rhs": "if (!s) s++",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:106-107"
      },
      {
        "lhs": "rc",
        "rhs": "do_hash(user, pin, pin_size, s, hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:109-110"
      },
      {
        "lhs": "*salt",
        "rhs": "s (assigned on successful do_hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:110-111"
      }
    ],
    "sanitizers": [
      {
        "kind": "sanity_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:106-107",
        "evidence": "Ensures generated s is non-zero by incrementing if zero"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "pin pointer passed from set_pin (caller REE memref) into hash_pin; alias of REE-visible buffer recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "salt pointer (&token->db_main->so_pin_salt) passed to hash_pin to receive generated salt; binding to TEE-private DB recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(s),src_sz=sizeof(s),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "hash buffer (token->db_main->so_pin_hash) passed as output to hash_pin/do_hash; TEE-private storage bound to callee.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=TEE_MAX_HASH_SIZE,src_sz=TEE_MAX_HASH_SIZE,dst_sz=TEE_MAX_HASH_SIZE"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "pin pointer from set_pin (USER path) passed into hash_pin; alias of REE-visible buffer recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "salt pointer (&token->db_main->user_pin_salt) bound as output for generated salt; recorded as TEE-private target.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(s),src_sz=sizeof(s),dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "hash output buffer (token->db_main->user_pin_hash) passed into hash_pin/do_hash; TEE-private destination recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=TEE_MAX_HASH_SIZE,src_sz=TEE_MAX_HASH_SIZE,dst_sz=TEE_MAX_HASH_SIZE"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from hash_pin at lines [105, 322]:
-- Call #1 at line 105 --
103: uint32_t s = 0;
104:
105: >>> TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
-- Call #2 at line 322 --
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 105:
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101:     {
102:     	enum pkcs11_rc rc = PKCS11_CKR_OK;
103:     	uint32_t s = 0;
104:     
105: >>> 	TEE_GenerateRandom(&s, sizeof(s));
106:     	if (!s)
107:     		s++;
108:     
109:     	rc = do_hash(user, pin, pin_size, s, hash);
110:     	if (!rc)

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GenerateRandom",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "buffer",
      "size"
    ],
    "propagation": [
      {
        "lhs": "buffer (destination)",
        "rhs": "caller-provided pointer passed into TEE_GenerateRandom",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105"
      },
      {
        "lhs": "buffer (destination)",
        "rhs": "caller-provided obj->uuid passed into TEE_GenerateRandom",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 105,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Address of local s (TEE-private stack) is passed as destination to TEE_GenerateRandom; random written into TEE-private variable.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(s)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(&s, sizeof(s));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "obj->uuid (TEE-private object field) is used as destination for random bytes to generate a UUID; binding of destination recorded.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [105]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [105] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      105
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 105,
      "function": "hash_pin",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "Destination is a TA-private local variable (&s); data flows from RNG into TEE-private storage and RNG input is not tainted from REE, so no tainted→dangerous-sink pattern.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "TEE_GenerateRandom at line 105 writes random bytes into a TEE-private stack variable derived inside the TA; the destination is not REE-visible and the RNG input is not REE-tainted, so no tainted data is leaked.",
  "effective_sanitizers": [
    {
      "type": "sanity_check",
      "location": "persistent_token.c:106-107",
      "evidence": "if (!s) s++; ensures non-zero salt"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1090-1102",
      "evidence": "ptypes check in entry_ck_init_pin prevents unexpected param types"
    },
    {
      "type": "bounds_check",
      "location": "pkcs11_token.c:1044-1046",
      "evidence": "new_pin_size checked against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    }
  ],
  "argument_safety": [
    {
      "arg": "&s (destination)",
      "why_safe": "destination is TA-private stack variable",
      "evidence": "persistent_token.c:103-107"
    },
    {
      "arg": "obj->uuid (other call site)",
      "why_safe": "destination stored in TEE-private object memory; generated UUID used internally",
      "evidence": "persistent_token.c:320-323"
    }
  ],
  "residual_risks": [],
  "confidence_factors": {
    "positive_indicators": [
      "destination is TEE-private local variable",
      "no REE-originated taint reaches this call site",
      "sanity check makes salt non-zero"
    ],
    "negative_indicators": [
      "TEE_GenerateRandom writes to caller-provided buffers at other call sites (obj->uuid) but those are TEE-private in observed contexts"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The RNG call at line 105 produces non-sensitive random bytes into a TA-private variable; no REE-tainted input is consumed and no REE-visible destination is written here, so this line is not vulnerable under the taint→sink policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 193,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=0,dst_sz=0"
        ]
      },
      "why": "caller-provided client pointer is forwarded into callee parameter; origin region uncertain (session handle from caller), so alias binding recorded.",
      "code_excerpt": "rc = entry_ck_init_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 193,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "caller-provided params (memref.buffer) is passed into callee; buffer is REE-shared and may contain PIN data, so binding recorded and sensitivity elevated.",
      "code_excerpt": "rc = entry_ck_init_pin(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1128,
      "function": "entry_ck_init_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "pin pointer obtained from serialargs (originating from caller memref buffer) is passed to set_pin; alias of shared buffer into callee.",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1128,
      "function": "set_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "Caller-provided params.memref.buffer (pin) is forwarded into set_pin as new_pin; alias of REE-visible buffer recorded.",
      "code_excerpt": "return set_pin(session, pin, pin_size, PKCS11_CKU_USER);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "set_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=new_pin_size,src_sz=new_pin_size,dst_sz=unknown"
        ]
      },
      "why": "new_pin (from REE) is passed into hash_pin which writes into token DB hashes (TEE-private); alias recorded and sensitivity is credential.",
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1050,
      "function": "hash_pin",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=unknown"
        ]
      },
      "why": "pin pointer passed from set_pin (caller REE memref) into hash_pin; alias of REE-visible buffer recorded.",
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 105,
      "function": "TEE_GenerateRandom",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(s)"
        ]
      },
      "why": "Address of local s (TEE-private stack) is passed as destination to TEE_GenerateRandom; random written into TEE-private variable.",
      "code_excerpt": "TEE_GenerateRandom(&s, sizeof(s));"
    }
  ]
}
フロー #209: TA_InvokeCommandEntryPoint -> entry_ck_set_pin -> set_pin -> hash_pin -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_ck_set_pinset_pinhash_pinTEE_GenerateRandom

実行時間: 81.18秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105

パラメータインデックス: 0

解析結果

詳細: TEE_GenerateRandom at line 105 writes TA-private randomness (non-sensitive by policy default) and is not copied to REE at this program point, so it is not an information-leak sink.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: hash_pin
プロンプト 中間 (hash_pin)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “hash_pin” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from set_pin at lines [1050, 1062]:
-- Call #1 at line 1050 --
1048:     	switch (user_type) {
1049:     	case PKCS11_CKU_SO:
1050: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1051:     			      &token->db_main->so_pin_salt,
1052:     			      token->db_main->so_pin_hash);
-- Call #2 at line 1062 --
1060:     		break;
1061:     	case PKCS11_CKU_USER:
1062: >>> 		rc = hash_pin(user_type, new_pin, new_pin_size,
1063:     			      &token->db_main->user_pin_salt,
1064:     			      token->db_main->user_pin_hash);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

98: enum pkcs11_rc hash_pin(enum pkcs11_user_type user, const uint8_t *pin,
99: size_t pin_size, uint32_t *salt,
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101: {
102: enum pkcs11_rc rc = PKCS11_CKR_OK;
103: uint32_t s = 0;
104:
105: TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
108:
109: rc = do_hash(user, pin, pin_size, s, hash);
110: if (!rc)
111: *salt = s;
112: return rc;
113: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"hash_pin",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (hash_pin)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "hash_pin",
    "tainted_vars": [
      "user",
      "pin",
      "pin_size",
      "salt",
      "hash",
      "s"
    ],
    "propagation": [
      {
        "lhs": "s",
        "rhs": "TEE_GenerateRandom(&s, sizeof(s))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105"
      },
      {
        "lhs": "hash (output)",
        "rhs": "do_hash(user, pin, pin_size, s, hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:109"
      },
      {
        "lhs": "*salt",
        "rhs": "s (assigned on successful hash)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:111"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument originates from caller-provided buffer (REE-visible PIN).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'salt' argument is a pointer into TA-private token DB (destination for salt).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(*salt)"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1050,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'hash' buffer argument is TA-private storage for PIN hash.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=TEE_MAX_HASH_SIZE,src_sz=TEE_MAX_HASH_SIZE,dst_sz=TEE_MAX_HASH_SIZE"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->so_pin_salt, token->db_main->so_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'pin' argument originates from caller-provided buffer (REE-visible PIN).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=pin_size,src_sz=pin_size,dst_sz=pin_size"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'salt' argument is a pointer into TA-private token DB (destination for salt).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=unknown,dst_sz=sizeof(*salt)"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1062,
      "function": "hash_pin",
      "rule": "other",
      "why": "Call-site binding: 'hash' buffer argument is TA-private storage for PIN hash.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=TEE_MAX_HASH_SIZE,src_sz=TEE_MAX_HASH_SIZE,dst_sz=TEE_MAX_HASH_SIZE"
        ]
      },
      "code_excerpt": "rc = hash_pin(user_type, new_pin, new_pin_size, &token->db_main->user_pin_salt, token->db_main->user_pin_hash);"
    }
  ]
}

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from hash_pin at lines [105, 322]:
-- Call #1 at line 105 --
103: uint32_t s = 0;
104:
105: >>> TEE_GenerateRandom(&s, sizeof(s));
106: if (!s)
107: s++;
-- Call #2 at line 322 --
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 105:
100: uint8_t hash[TEE_MAX_HASH_SIZE])
101:     {
102:     	enum pkcs11_rc rc = PKCS11_CKR_OK;
103:     	uint32_t s = 0;
104:     
105: >>> 	TEE_GenerateRandom(&s, sizeof(s));
106:     	if (!s)
107:     		s++;
108:     
109:     	rc = do_hash(user, pin, pin_size, s, hash);
110:     	if (!rc)

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_GenerateRandom",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "buf",
      "len",
      "s",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "s",
        "rhs": "TEE_GenerateRandom(&s, sizeof(s))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105"
      },
      {
        "lhs": "obj->uuid",
        "rhs": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 105,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Call-site binding: destination &s is TA-local storage (TEE-private) receiving generated randomness (random considered non-sensitive by default).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(s),src_sz=0,dst_sz=sizeof(s)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(&s, sizeof(s));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Call-site binding: destination obj->uuid is TA-managed persistent object field (TEE-private) filled with randomness for UUID; origin is TA-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=0,dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [105]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [105] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      105
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 105,
      "function": "hash_pin",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "Generates randomness into TA-private stack variable 's'; randomness is non-sensitive by default and does not flow to REE at this site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TEE_GenerateRandom output",
      "propagation_path": [
        "s <- TEE_GenerateRandom(&s, sizeof(s)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:105",
        "*salt <- s (on success) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:111",
        "salt stored into token DB fields by caller set_pin/hash_pin"
      ],
      "sink": "TA-private token DB (salt) and hash output buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "None specific to this line; caller must later expose TA-private randomness to REE (not observed at this site)."
      ],
      "attack_scenario": "Not applicable: random generation here does not directly leak to REE.",
      "impact": "Low if randomness is weak; otherwise affects salt uniqueness for PIN hashing within TA."
    },
    "missing_mitigations": [
      {
        "type": "other",
        "location": "persistent_token.c:105",
        "recommendation": "Ensure TEE_GenerateRandom provides crypto-grade entropy and check return semantics where applicable."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Destination is TA-private stack variable 's'.",
        "No subsequent copy to REE at this line."
      ],
      "negative_indicators": [
        "If salt or hash were later copied to REE without protection, that could be an issue (not observed at this site)."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "TEE_GenerateRandom at line 105 writes TA-private randomness (non-sensitive by policy default) and is not copied to REE at this program point, so it is not an information-leak sink.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Randomness is produced into TA-private storage and there is no evidence of insufficient sanitization or REE-directed copy at this line.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "pkcs11_token.c:1248-1255",
      "evidence": "Function entry_ck_set_pin checks expected ptypes MEMREF_INOUT"
    },
    {
      "type": "bounds_check",
      "location": "pkcs11_token.c:1044-1046",
      "evidence": "PIN size validated against PKCS11_TOKEN_PIN_SIZE_MIN/MAX"
    }
  ],
  "argument_safety": [
    {
      "arg": "&s",
      "why_safe": "Destination is TA-local stack memory",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:103-106"
    }
  ],
  "residual_risks": [
    "Line 366: TEE_MemMove copies rc into REE-visible params[0].memref.buffer (structural risk flagged previously).",
    "serialargs_get_ptr uses REE-supplied lengths to fetch PIN pointers (weak_input_validation structural risk)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct observation that generated bytes target TA-private variable",
      "Policy default treats randomness as non-sensitive"
    ],
    "negative_indicators": [
      "If policy or context required randomness secrecy (e.g., seed for key derivation) this call could be more sensitive; no such evidence present"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No tainted sensitive data is written to REE at the TEE_GenerateRandom call site; randomness is stored in TA-private state and later used internally, so the call is not vulnerable under the provided policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); structural risk of leaking status to REE.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_token.c",
      "line": 1281,
      "function": "entry_ck_set_pin",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:credential",
          "size_triplet:copy_len=old_pin_size,src_sz=ctrl->memref.size,dst_sz=old_pin_size"
        ]
      },
      "why": "Uses sizes from REE-provided buffer (old_pin_size) to obtain pointer into that buffer without stronger semantic validation.",
      "code_excerpt": "serialargs_get_ptr(&ctrlargs, &old_pin, old_pin_size);"
    }
  ]
}
フロー #210: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> create_object_uuid -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objectcreate_object_uuidTEE_GenerateRandom

実行時間: 93.93秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322

パラメータインデックス: 0

解析結果

安全判定理由: Random-generation call writes TA-private UUID buffer with non-sensitive randomness and is preceded by allocation checks; no tainted secret is being exported at this call site.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (6 メッセージ)

関数: create_object_uuid
プロンプト 中間 (create_object_uuid)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “create_object_uuid” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [253]:
-- Call #1 at line 253 --
251: TEE_DATA_FLAG_ACCESS_WRITE_META;
252:
253: >>> rc = create_object_uuid(get_session_token(session), obj);
254: if (rc)
255: goto err;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

309: enum pkcs11_rc create_object_uuid(struct ck_token *token,
310: struct pkcs11_object *obj)
311: { 312: assert(!obj->uuid); 313: 314: obj->uuid = TEE_Malloc(sizeof(TEE_UUID), 315: TEE_USER_MEM_HINT_NO_FILL_ZERO); 316: if (!obj->uuid) 317: return PKCS11_CKR_DEVICE_MEMORY; 318: 319: obj->token = token; 320: 321: do { 322: TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0); 324: 325: return PKCS11_CKR_OK; 326: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "create_object_uuid", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"create_object_uuid", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (create_object_uuid)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "create_object_uuid",
    "tainted_vars": [
      "token",
      "obj",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid",
        "rhs": "TEE_Malloc(sizeof(TEE_UUID), TEE_USER_MEM_HINT_NO_FILL_ZERO)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-316"
      },
      {
        "lhs": "obj->token",
        "rhs": "token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:319-320"
      },
      {
        "lhs": "obj->uuid (filled)",
        "rhs": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:321-323"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:312-317",
        "evidence": "assert(!obj->uuid) and check for allocation failure returning DEVICE_MEMORY"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "rule": "other",
      "why": "Token pointer produced by get_session_token(session) is passed into create_object_uuid; origin is TA session token (TEE-private) but binding across calls noted.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "rule": "other",
      "why": "obj pointer (object derived from attributes/template) passed into create_object_uuid; attributes may originate from REE-deserialized template.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object),src_sz=template-derived,dst_sz=sizeof(struct pkcs11_object)"
        ]
      },
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 314,
      "function": "create_object_uuid",
      "rule": "other",
      "why": "Allocates obj->uuid via TEE_Malloc and fills with TEE_GenerateRandom; randomness treated public by default but uuid uniqueness loop queries persistent store.",
      "sink_function": "TEE_GenerateRandom",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA-internal",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object_uuid at lines [322]:
-- Call #1 at line 322 --
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 322:
317: return PKCS11_CKR_DEVICE_MEMORY;
318:
319: obj->token = token;
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:
325: return PKCS11_CKR_OK;
326: }
327:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_GenerateRandom", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_GenerateRandom", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "buffer",
      "len",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid (filled)",
        "rhs": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322"
      }
    ],
    "sanitizers": [
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-317",
        "evidence": "obj->uuid allocated and checked for NULL before generation"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Fills obj->uuid (TEE_Malloc'd) with random bytes; randomness treated non-sensitive by default though used as persistent object identifier.",
      "sink_function": "TEE_GenerateRandom",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Binding: obj->uuid (allocated in TA) passed as buffer argument to TEE_GenerateRandom; origin is TEE_Malloc'd memory in TA.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [322]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [322] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      322
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 322,
      "function": "create_object_uuid",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "TEE_GenerateRandom produces non-sensitive random bytes into TA-private heap (obj->uuid); by policy random is non-sensitive unless context elevates it and no such elevation is present here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Random-generation call writes TA-private UUID buffer with non-sensitive randomness and is preceded by allocation checks; no tainted secret is being exported at this call site.",
  "effective_sanitizers": [
    {
      "type": "allocation_check",
      "location": "create_object_uuid:314-317",
      "evidence": "obj->uuid = TEE_Malloc(...); if (!obj->uuid) return PKCS11_CKR_DEVICE_MEMORY"
    }
  ],
  "argument_safety": [
    {
      "arg": "obj->uuid",
      "why_safe": "allocated in TA before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-317"
    }
  ],
  "residual_risks": [
    "322: obj->uuid used as persistent object identifier after generation (uniqueness loop queries persistent store) — if UUID were later written to REE-visible memory or used as a secret, that could be sensitive."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Allocation and NULL-check before generation",
      "Policy default: random treated non-sensitive",
      "No copy to REE-visible buffer at this call site"
    ],
    "negative_indicators": [
      "obj originates from object constructed from template that may have REE-derived attributes",
      "Generated UUID is later stored persistently and used as identifier"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "TEE_GenerateRandom at line 322 fills a TA-allocated buffer with randomness; per policy randomness is non-sensitive and there is no evidence of insecure export at this call site, so it is not classified as a vulnerability. Structural concerns about REE-derived templates and later writes to REE were recorded separately.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Token pointer produced by get_session_token(session) is passed into create_object_uuid; origin is TA session token (TEE-private) but binding across calls noted.",
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object),src_sz=template-derived,dst_sz=sizeof(struct pkcs11_object)"
        ]
      },
      "why": "obj pointer (object derived from attributes/template) passed into create_object_uuid; attributes may originate from REE-deserialized template.",
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 314,
      "function": "create_object_uuid",
      "sink_function": "TEE_GenerateRandom",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA-internal",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "why": "Allocates obj->uuid via TEE_Malloc and fills with TEE_GenerateRandom; randomness treated public by default but uuid uniqueness loop queries persistent store.",
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+attrs_size,src_sz=template-derived,dst_sz=sizeof(struct obj_attrs)+attrs_size"
        ]
      },
      "why": "caller 'head' (obj_attrs) alias passed into callee; head may contain attributes derived from REE deserialization earlier",
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=out->memref.size"
        ]
      },
      "why": "caller passes &obj_handle (stack address) to receive handle from callee; binding of out_handle to caller stack",
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 289,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "caller-provided client pointer (from tee_session) is passed through as callee 'client' parameter; origin not proven TEE-private",
      "code_excerpt": "rc = entry_generate_secret(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 289,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=unknown,src_sz=ctrl->memref.size,dst_sz=out->memref.size"
        ]
      },
      "why": "alias of shared params array (caller-provided TEE_Param memrefs) passed into helper; memref buffers are REE-visible",
      "code_excerpt": "rc = entry_generate_secret(client, ptypes, params);"
    }
  ]
}
フロー #211: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> create_object_uuid -> TEE_GenerateRandom
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objectcreate_object_uuidTEE_GenerateRandom

実行時間: 60.49秒

ターゲットシンク情報

シンク関数: TEE_GenerateRandom

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:322

パラメータインデックス: 0

解析結果

詳細: TEE_GenerateRandom here writes non-sensitive random bytes into a TA-private buffer; promotion to unencrypted_output is not applicable because dst is not REE-visible and data is not sensitive.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: create_object_uuid
プロンプト 中間 (create_object_uuid)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “create_object_uuid” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [253]:
-- Call #1 at line 253 --
251: TEE_DATA_FLAG_ACCESS_WRITE_META;
252:
253: >>> rc = create_object_uuid(get_session_token(session), obj);
254: if (rc)
255: goto err;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

309: enum pkcs11_rc create_object_uuid(struct ck_token *token,
310: struct pkcs11_object *obj)
311: { 312: assert(!obj->uuid); 313: 314: obj->uuid = TEE_Malloc(sizeof(TEE_UUID), 315: TEE_USER_MEM_HINT_NO_FILL_ZERO); 316: if (!obj->uuid) 317: return PKCS11_CKR_DEVICE_MEMORY; 318: 319: obj->token = token; 320: 321: do { 322: TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0); 324: 325: return PKCS11_CKR_OK; 326: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "create_object_uuid", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"create_object_uuid", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (create_object_uuid)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "create_object_uuid",
    "tainted_vars": [
      "token",
      "obj",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid",
        "rhs": "TEE_Malloc(sizeof(TEE_UUID), ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-316"
      },
      {
        "lhs": "obj->token",
        "rhs": "token",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:319-320"
      },
      {
        "lhs": "obj->uuid (filled)",
        "rhs": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:321-323"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "rule": "other",
      "why": "Binding of callee parameter 'token' to origin get_session_token(session) at call site; token is session-associated and resides in TA-managed context",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct ck_token*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 253,
      "function": "create_object_uuid",
      "rule": "other",
      "why": "Binding of callee parameter 'obj' to caller 'obj' (created earlier in create_object); obj and its fields are TA-managed but may contain attributes derived from REE-parsed templates",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct pkcs11_object*),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = create_object_uuid(get_session_token(session), obj);"
    }
  ]
}

関数: TEE_GenerateRandom
プロンプト 中間 (TEE_GenerateRandom)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_GenerateRandom” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object_uuid at lines [322]:
-- Call #1 at line 322 --
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 322:
317: return PKCS11_CKR_DEVICE_MEMORY;
318:
319: obj->token = token;
320:
321: do { 322: >>> TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID)); 323: } while (get_persistent_obj_idx(token, obj->uuid) >= 0);
324:
325: return PKCS11_CKR_OK;
326: }
327:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_GenerateRandom", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_GenerateRandom", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_GenerateRandom)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_GenerateRandom",
    "tainted_vars": [
      "token",
      "obj",
      "obj->uuid"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid",
        "rhs": "TEE_Malloc(sizeof(TEE_UUID), ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-316"
      },
      {
        "lhs": "obj->uuid (filled)",
        "rhs": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:321-323"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 322,
      "function": "TEE_GenerateRandom",
      "rule": "other",
      "why": "Generates random bytes directly into obj->uuid (TA-allocated buffer); buffer originates from TEE_Malloc and is TA-private but derived object may be later persisted or exposed.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:random",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_GenerateRandom(obj->uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_GenerateRandom
- target_sink_lines: [322]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [322] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_GenerateRandom",
    "lines": [
      322
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 322,
      "function": "create_object_uuid",
      "sink_function": "TEE_GenerateRandom",
      "status": "not_applicable",
      "why": "Generates random bytes into a TEE_Malloc'd TA-private buffer (obj->uuid); random data is non-sensitive by default and destination is not REE-visible at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TEE_GenerateRandom wrote to obj->uuid (TA-private)",
      "propagation_path": [
        "obj->uuid <- TEE_Malloc(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-316",
        "obj->uuid <- TEE_GenerateRandom(...) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:321-323"
      ],
      "sink": "TEE_GenerateRandom call at create_object_uuid:322"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker can influence obj contents only via earlier template parsing (but random generation itself is internal)",
        "no direct REE exposure at this line"
      ],
      "attack_scenario": "Not applicable — generated UUID is TA-private here and not secret material; direct exploitation from this call is unlikely.",
      "impact": "None from this call alone; potential later persistence of UUID is expected behavior."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "create_object_uuid:322",
        "recommendation": "Ensure obj->uuid is not written to REE-visible buffers without checks when persisting or returning handles."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "destination buffer allocated with TEE_Malloc (TA-private)",
        "randomness labeled 'random' by policy"
      ],
      "negative_indicators": [
        "obj may later be persisted to storage, but persistence is separate call guarded by checks"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "TEE_GenerateRandom here writes non-sensitive random bytes into a TA-private buffer; promotion to unencrypted_output is not applicable because dst is not REE-visible and data is not sensitive.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Random bytes are written into a TA-private buffer and are non-sensitive by default; no REE-visible exposure occurs at this sink line.",
  "effective_sanitizers": [
    {
      "type": "allocation_check",
      "location": "create_object_uuid:314-316",
      "evidence": "obj->uuid = TEE_Malloc(...); if (!obj->uuid) return PKCS11_CKR_DEVICE_MEMORY"
    }
  ],
  "argument_safety": [
    {
      "arg": "obj->uuid",
      "why_safe": "Allocated in TA memory and used solely within TA at this point",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:314-323"
    }
  ],
  "residual_risks": [
    "322: obj->uuid is later used for persistent object indexing/persistence; ensure subsequent persistence to storage or any copy to REE are access-controlled (memory-safety and confidentiality checks)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "clear allocation and write into TA-private buffer",
      "policy default treats generated randomness as non-sensitive"
    ],
    "negative_indicators": [
      "uuid may be persisted later (separate code paths)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "No tainted sensitive data flows into a dangerous external sink at this line; the call generates non-sensitive random data into TA-private memory, so it's not a vulnerability per the policy.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk since destination is shared memory.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 556,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(privkey_handle),src_sz=sizeof(privkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated private key handle into caller-provided out->memref.buffer (REE-visible); structural risk due to shared buffer write.",
      "code_excerpt": "TEE_MemMove(hdl_ptr + 1, &privkey_handle, sizeof(privkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local return code into caller-provided params[0].memref.buffer (REE-visible); structural risk since destination is shared memory.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #212: TA_InvokeCommandEntryPoint -> entry_ck_token_initialize -> unregister_persistent_object -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_ck_token_initializeunregister_persistent_objectTEE_MemMove

実行時間: 74.83秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-119

深刻度: MEDIUM

テイントフロー:

ソース: token->db_objs (TA-managed persistent DB array of UUIDs)

シンク: TEE_MemMove writing count * sizeof(TEE_UUID) bytes into &ptr->uuids[idx]

判定理由: The memmove at line 395 uses a runtime-derived 'count' as the copy length with only indirect validation (idx from helper and earlier allocation). This reliance on upstream correctness without an explicit local bounds check creates a plausible out-of-bounds write condition, so classify as weak_input_validation vulnerability with medium confidence.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [388, 395, 435, 640]:
-- Call #1 at line 388 --
386: }
387:
388: >>> TEE_MemMove(ptr, token->db_objs,
389: sizeof(struct token_persistent_objs) +
390: idx * sizeof(TEE_UUID));
-- Call #2 at line 395 --
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
-- Call #3 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #4 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 395:
390: idx * sizeof(TEE_UUID));
391:
392: ptr->count--;
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
398:
399: res = TEE_WriteObjectData(db_hdl, ptr,
400: sizeof(struct token_persistent_objs) +

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "ptr",
      "token->db_objs",
      "ptr->uuids",
      "uuid",
      "db_objs",
      "idx",
      "count"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "call-site first argument (destination pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388"
      },
      {
        "lhs": "src",
        "rhs": "call-site second argument (source pointer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388"
      },
      {
        "lhs": "len",
        "rhs": "call-site third argument (length expression)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388"
      },
      {
        "lhs": "len",
        "rhs": "count * sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "dest/src",
        "rhs": "db_objs->uuids[idx] or &ptr->uuids[idx]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      }
    ],
    "sanitizers": [
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375",
        "evidence": "TEE_Malloc checked for NULL"
      },
      {
        "kind": "index_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "get_persistent_obj_idx checked for idx < 0"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination argument 'ptr' is TA-allocated buffer (TEE_Malloc) passed as dest.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source argument 'token->db_objs' is TA-owned database structure passed as src.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Length depends on idx (from get_persistent_obj_idx) and token->db_objs->count; arithmetic may miscompute copy length if counts/idx inconsistent.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination &ptr->uuids[idx] is region inside TA-allocated 'ptr'.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count*sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx + 1)) * sizeof(TEE_UUID),dst_sz=ptr->count * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source &token->db_objs->uuids[idx + 1] is TA-owned array element used as src.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count*sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx + 1)) * sizeof(TEE_UUID),dst_sz=ptr->count * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copy length 'count * sizeof(TEE_UUID)' derived from ptr->count - idx; if arithmetic under/overflows, copy may be out-of-bounds.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count*sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx + 1)) * sizeof(TEE_UUID),dst_sz=ptr->count * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination token->db_objs->uuids + count is TA-managed array location used as dest.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=(token->db_objs->count - 1 - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source 'uuid' is local/stack or caller-supplied UUID used as src.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination 'uuid' is local variable receiving data read from db_objs.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=ptr->count * sizeof(TEE_UUID),dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies sizeof(*uuid) from &db_objs->uuids[idx] with idx validated earlier but without redundant bounds check at this call site.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [395]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [395] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      395
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copy length 'count * sizeof(TEE_UUID)' is derived from ptr->count - idx (computed from token->db_objs counts); if idx/count arithmetic is incorrect or inconsistent, this TEE_MemMove can perform an out-of-bounds copy (insufficient explicit bounds check at call site).",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-119",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "token->db_objs (TA-managed persistent DB array of UUIDs)",
      "propagation_path": [
        "idx <- get_persistent_obj_idx(token, uuid) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-366",
        "ptr allocated based on token->db_objs->count @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-374",
        "ptr->count set and count = ptr->count - idx @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:392-394",
        "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395"
      ],
      "sink": "TEE_MemMove writing count * sizeof(TEE_UUID) bytes into &ptr->uuids[idx]"
    },
    "exploitation_analysis": {
      "preconditions": [
        "get_persistent_obj_idx returns an idx inconsistent with token->db_objs->count (e.g., logic bug or corrupted DB)",
        "ptr allocation succeeded but token->db_objs->count and idx arithmetic yields a large or negative count interpreted as large unsigned"
      ],
      "attack_scenario": "An attacker or corrupted persistent DB causes idx/count mismatch so that the computed copy length exceeds destination capacity, resulting in out-of-bounds write in TA memory, enabling memory corruption and potential control-flow/data corruption.",
      "impact": "Memory corruption within the TA (possible crash, data corruption, or code execution depending on layout)"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "unregister_persistent_object:395",
        "recommendation": "Explicitly validate that 0 <= idx < original_count and that count computed as (ptr->count - idx) is non-negative and fits destination before calling TEE_MemMove."
      },
      {
        "type": "mem_access_check",
        "location": "unregister_persistent_object:388-397",
        "recommendation": "Use safe copy helpers that check and cap lengths, or verify arithmetic using size_t and overflow checks prior to copy."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Copy length is derived from arithmetic on runtime values (ptr->count and idx)",
        "No explicit bounds check at the memmove call site beyond earlier idx lookup"
      ],
      "negative_indicators": [
        "get_persistent_obj_idx is called and idx < 0 is handled earlier",
        "Allocation and some checks exist (malloc NULL, idx negative) which reduce but do not eliminate risk"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The memmove at line 395 uses a runtime-derived 'count' as the copy length with only indirect validation (idx from helper and earlier allocation). This reliance on upstream correctness without an explicit local bounds check creates a plausible out-of-bounds write condition, so classify as weak_input_validation vulnerability with medium confidence.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
        "line": 395,
        "function": "unregister_persistent_object",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove copies count * sizeof(TEE_UUID) where count = ptr->count - idx; idx/count arithmetic may be inconsistent leading to out-of-bounds copy."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "index_validation",
      "location": "unregister_persistent_object:365-369",
      "evidence": "get_persistent_obj_idx result checked for idx < 0"
    },
    {
      "type": "allocation_check",
      "location": "unregister_persistent_object:371-375",
      "evidence": "TEE_Malloc return checked for NULL"
    }
  ],
  "argument_safety": [
    {
      "arg": "token",
      "why_safe": "TA-managed structure; validated presence and flags earlier",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:359-366"
    },
    {
      "arg": "uuid",
      "why_safe": "checked for NULL early; get_persistent_obj_idx validated existence",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:362-369"
    }
  ],
  "residual_risks": [
    "line 395 prioritized memory-safety; potential information disclosure not promoted here but TA persistent DB contents are sensitive in context"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct arithmetic-driven copy length at sink",
      "No explicit bounds check immediately before the TEE_MemMove at line 395"
    ],
    "negative_indicators": [
      "Helper get_persistent_obj_idx and earlier checks reduce likelihood of invalid idx",
      "Operations occur entirely on TA-private buffers (no REE-visible destination)"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety risk (out-of-bounds copy) is the predominant issue for this sink; existing indirect checks are insufficient to guarantee safety at the call site.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "why": "Initial TEE_MemMove uses idx-derived length; arithmetic assumptions on counts may be incorrect without explicit bounds at the call.",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count*sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx + 1)) * sizeof(TEE_UUID),dst_sz=ptr->count * sizeof(TEE_UUID)"
        ]
      },
      "why": "Shift-copy of UUID array uses 'count' derived from ptr->count - idx; missing explicit bounds check at call site.",
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #213: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> destroy_object -> unregister_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairdestroy_objectunregister_persistent_objectTEE_MemMove

実行時間: 48.70秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

パラメータインデックス: 0

解析結果

詳細: Sanitizers (idx check and allocation+NULL check) precede the MemMove and the destination buffer was sized to accommodate the shifted UUIDs, so the copy at line 395 is not a tainted-sink vulnerability under the given policy.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [388, 395, 435, 640]:
-- Call #1 at line 388 --
386: }
387:
388: >>> TEE_MemMove(ptr, token->db_objs,
389: sizeof(struct token_persistent_objs) +
390: idx * sizeof(TEE_UUID));
-- Call #2 at line 395 --
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
-- Call #3 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #4 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 395:
390: idx * sizeof(TEE_UUID));
391:
392: ptr->count--;
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
398:
399: res = TEE_WriteObjectData(db_hdl, ptr,
400: sizeof(struct token_persistent_objs) +

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "ptr (allocated buffer) <- TEE_Malloc(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-373,388"
      },
      {
        "lhs": "src",
        "rhs": "token->db_objs (persistent DB in token)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388"
      },
      {
        "lhs": "dest",
        "rhs": "&ptr->uuids[idx]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395"
      },
      {
        "lhs": "src",
        "rhs": "&token->db_objs->uuids[idx + 1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395"
      },
      {
        "lhs": "dest",
        "rhs": "token->db_objs->uuids + count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "src",
        "rhs": "uuid (caller-provided uuid)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "dest",
        "rhs": "uuid (output buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      },
      {
        "lhs": "src",
        "rhs": "&db_objs->uuids[idx]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369",
        "evidence": "idx validated by get_persistent_obj_idx and negative index handled"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375",
        "evidence": "ptr allocated and checked for NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies from token->db_objs (persistent DB) into freshly allocated ptr using idx-derived length; source is TA-managed persistent data but index and size depend on token->db_objs->count",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + (token->db_objs->count - 1) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Shifts tail UUIDs within ptr using count computed from ptr->count - idx; length depends on ptr->count and idx validated earlier",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - idx - 1) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Inserts uuid into token->db_objs by copying caller-provided uuid into db array; destination is TA-managed persistent array and source may be external/internal uuid",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies UUID from db_objs into local uuid buffer for object creation; destination uuid buffer provenance depends on caller and is used to create object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=ptr->count * sizeof(TEE_UUID),dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [395]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [395] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      395
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copy length is count * sizeof(TEE_UUID) where idx was validated by get_persistent_obj_idx and ptr was allocated to accommodate token->db_objs->count - 1; allocation and idx checks present before the call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token->db_objs (TA-managed persistent DB)",
      "propagation_path": [
        "token->db_objs used to compute allocation and copy length @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-373,365-369",
        "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395"
      ],
      "sink": "TEE_MemMove destination ptr->uuids within TA-private memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "token->db_objs structure incorrectly populated (unlikely given checks)",
        "get_persistent_obj_idx returns an out-of-range idx (guarded against)"
      ],
      "attack_scenario": "An attacker would need to corrupt token->db_objs or bypass idx validation to cause an over-read/overflow; current checks and allocation mitigate this.",
      "impact": "Potential memory corruption if corrupted metadata allowed; otherwise none."
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "unregister_persistent_object:388-395",
        "recommendation": "Add explicit range assertions or use safe copy helpers that check both source and destination size at call site to harden against corrupted metadata."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "idx validated via get_persistent_obj_idx with negative result handled",
        "ptr allocation checked for NULL before use",
        "copy length derived from ptr->count which was adjusted and derived from validated values"
      ],
      "negative_indicators": [
        "complex arithmetic on counts/indices could be brittle if token->db_objs is corrupted elsewhere",
        "some sizes are symbolic (token->db_objs->count) not concrete in analysis"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Sanitizers (idx check and allocation+NULL check) precede the MemMove and the destination buffer was sized to accommodate the shifted UUIDs, so the copy at line 395 is not a tainted-sink vulnerability under the given policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Index and allocation checks prior to the MemMove provide effective sanitization for the computed copy length and buffers.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "unregister_persistent_object:365-369",
      "evidence": "idx = get_persistent_obj_idx(token, uuid); if (idx < 0) return PKCS11_RV_NOT_FOUND"
    },
    {
      "type": "allocation_check",
      "location": "unregister_persistent_object:371-375",
      "evidence": "ptr = TEE_Malloc(...); if (!ptr) return PKCS11_CKR_DEVICE_MEMORY"
    }
  ],
  "argument_safety": [
    {
      "arg": "idx",
      "why_safe": "validated by get_persistent_obj_idx and negative handled",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-369"
    },
    {
      "arg": "ptr",
      "why_safe": "allocated to expected size and NULL-checked before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375"
    }
  ],
  "residual_risks": [
    "If token->db_objs metadata is corrupted elsewhere (e.g., count mismatch), arithmetic on counts/indices could produce incorrect lengths leading to out-of-bounds copies."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit idx validation and allocation checks present",
      "copy sizes expressed in terms of sizeof(TEE_UUID) and adjusted counts"
    ],
    "negative_indicators": [
      "symbolic sizes and reliance on consistent token metadata"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks precede the sink and destination/source are TA-private; no evidence of TA-private secret flowing to REE at this call, so no information-disclosure classification applies.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + (token->db_objs->count - 1) * sizeof(TEE_UUID)"
        ]
      },
      "why": "Allocation and copy lengths depend on token->db_objs->count and idx; if metadata is corrupted elsewhere this could lead to incorrect sizing.",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    }
  ]
}
フロー #214: TA_InvokeCommandEntryPoint -> entry_ck_close_session -> close_ck_session -> destroy_object -> unregister_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_close_sessionclose_ck_sessiondestroy_objectunregister_persistent_objectTEE_MemMove

実行時間: 49.86秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

パラメータインデックス: 0

解析結果

詳細: Index and allocation checks upstream ensure the computed count matches available trailing UUIDs, and both src and dst are TA-private, so no REE disclosure; lack of an explicit count>=0 assert is noted but not sufficient to mark vulnerable.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [388, 395, 435, 640]:
-- Call #1 at line 388 --
386: }
387:
388: >>> TEE_MemMove(ptr, token->db_objs,
389: sizeof(struct token_persistent_objs) +
390: idx * sizeof(TEE_UUID));
-- Call #2 at line 395 --
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
-- Call #3 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #4 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 395:
390: idx * sizeof(TEE_UUID));
391:
392: ptr->count--;
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
398:
399: res = TEE_WriteObjectData(db_hdl, ptr,
400: sizeof(struct token_persistent_objs) +

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "ptr",
        "rhs": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-390"
      },
      {
        "lhs": "&ptr->uuids[idx]",
        "rhs": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "uuid",
        "rhs": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies token->db_objs into newly allocated ptr using idx-derived length; sizes depend on token->db_objs contents.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Moves tail UUIDs within persistent lists using count-derived length; count depends on ptr->count and idx.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies uuid into token->db_objs array slot; origin of uuid may be internal but binding persists into persistent array.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies UUID from db_objs into local uuid buffer; reads persistent array into caller-provided uuid pointer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [395]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [395] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      395
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Source and destination are TA-private persistent arrays and index/length derive from validated idx and an allocated ptr sized to hold (count-1) entries; arithmetic yields matching copy_len = number of trailing UUIDs, and prior checks (idx >= 0, ptr allocation) prevent obvious OOB.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token->db_objs (TA-private persistent array)",
      "propagation_path": [
        "get_persistent_obj_idx(...) -> idx @ persistent_token.c:365",
        "TEE_Malloc(...) -> ptr @ persistent_token.c:371-373",
        "TEE_MemMove(ptr, token->db_objs, ...) @ persistent_token.c:388-390",
        "&ptr->uuids[idx] <- &token->db_objs->uuids[idx + 1] copy @ persistent_token.c:395-397"
      ],
      "sink": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID))"
    },
    "exploitation_analysis": {
      "preconditions": [
        "token->db_objs and idx must be consistent (idx validated by get_persistent_obj_idx)",
        "successful allocation of ptr"
      ],
      "attack_scenario": "An attacker controlling token->db_objs contents could attempt to influence idx or counts, but idx is obtained by lookup and negative/invalid idx are rejected; allocation and index checks mitigate straightforward exploitation.",
      "impact": "If flawed, could cause memory corruption within TA memory; current evidence indicates low risk."
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "unregister_persistent_object:395",
        "recommendation": "Explicitly assert or check that count >= 0 before TEE_MemMove to make the intent explicit and defensive."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "idx validated (idx < 0 handled) before use",
        "ptr allocation checked",
        "allocation size derived from token->db_objs->count ensuring dst capacity matches expected copy length"
      ],
      "negative_indicators": [
        "no explicit runtime check that count >= 0 immediately before the second TEE_MemMove",
        "relies on arithmetic correctness across several lines"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Index and allocation checks upstream ensure the computed count matches available trailing UUIDs, and both src and dst are TA-private, so no REE disclosure; lack of an explicit count>=0 assert is noted but not sufficient to mark vulnerable.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 395 operates on TA-private buffers with index and allocation validated upstream such that copy length matches available elements; thus no tainted REE→sink path or evident bounds violation.",
  "effective_sanitizers": [
    {
      "type": "index_check",
      "location": "unregister_persistent_object:365-369",
      "evidence": "if (idx < 0) return PKCS11_RV_NOT_FOUND"
    },
    {
      "type": "alloc_check",
      "location": "unregister_persistent_object:371-375",
      "evidence": "if (!ptr) return PKCS11_CKR_DEVICE_MEMORY"
    }
  ],
  "argument_safety": [
    {
      "arg": "idx",
      "why_safe": "validated by get_persistent_obj_idx and negative idx handled",
      "evidence": "persistent_token.c:365-369"
    },
    {
      "arg": "ptr",
      "why_safe": "allocated with size derived from token->db_objs->count and checked for NULL",
      "evidence": "persistent_token.c:371-375"
    }
  ],
  "residual_risks": [
    "No explicit runtime check that count >= 0 immediately before the copy; relies on prior arithmetic/logic correctness."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit idx validation and allocation checks",
      "copy length derivation matches remaining UUID count by arithmetic"
    ],
    "negative_indicators": [
      "absence of an immediate defensive check for count >= 0",
      "complex arithmetic across multiple lines"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety precedence: no evidence copy_len exceeds available src/dst given validated idx and allocation; data remains TA-private so no information disclosure; therefore not vulnerable but a minor structural risk remains.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "why": "Copy length computed from ptr->count and idx; while upstream checks make it safe, absence of an immediate explicit count>=0 check is a structural risk.",
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #215: TA_InvokeCommandEntryPoint -> entry_ck_close_all_sessions -> close_ck_session -> destroy_object -> unregister_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_ck_close_all_sessionsclose_ck_sessiondestroy_objectunregister_persistent_objectTEE_MemMove

実行時間: 49.55秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

パラメータインデックス: 0

解析結果

詳細: Memory-safety appears preserved by idx validation and allocation size calculations; no evidence that REE-tainted input directly controls the copy length at this point, so line is not classified vulnerable under the policy.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [388, 395, 435, 640]:
-- Call #1 at line 388 --
386: }
387:
388: >>> TEE_MemMove(ptr, token->db_objs,
389: sizeof(struct token_persistent_objs) +
390: idx * sizeof(TEE_UUID));
-- Call #2 at line 395 --
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
-- Call #3 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #4 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 395:
390: idx * sizeof(TEE_UUID));
391:
392: ptr->count--;
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
398:
399: res = TEE_WriteObjectData(db_hdl, ptr,
400: sizeof(struct token_persistent_objs) +

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "ptr (allocated from TEE_Malloc in unregister_persistent_object)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:371-375,388"
      },
      {
        "lhs": "src",
        "rhs": "token->db_objs (persistent token DB)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365-366,388"
      },
      {
        "lhs": "dst",
        "rhs": "&ptr->uuids[idx]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:392-396"
      },
      {
        "lhs": "src",
        "rhs": "&token->db_objs->uuids[idx + 1]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "dst",
        "rhs": "token->db_objs->uuids + count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:433-435"
      },
      {
        "lhs": "src",
        "rhs": "uuid (argument)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:433-435"
      },
      {
        "lhs": "dst",
        "rhs": "uuid (local buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      },
      {
        "lhs": "src",
        "rhs": "&db_objs->uuids[idx]",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:638-640"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copy from token->db_objs into freshly allocated ptr using idx-derived length; source and destination are TA-managed persistent structures.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+idx*sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1)*sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Shifts trailing UUIDs within ptr from token->db_objs; indices and count drive the copy length (derived from TA data).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies provided uuid into token->db_objs->uuids area; destination is TA-managed persistent DB memory updated from local uuid.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads UUID from persistent DB into local uuid buffer; source is token DB object area (TA-private).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=unknown,dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [395]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [395] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      395
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copy length is computed from ptr->count and idx which were derived from validated idx and sized allocation; allocator and earlier idx check reduce risk of out-of-bounds at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token->db_objs (TA-managed persistent DB) and ptr (TEE_Malloc'd buffer)",
      "propagation_path": [
        "get_persistent_obj_idx <- uuid @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:365",
        "TEE_Malloc sized from token->db_objs->count @ ...:371-375",
        "TEE_MemMove(... &token->db_objs->uuids[idx + 1] ...) @ ...:395"
      ],
      "sink": "TEE_MemMove copy of UUIDs within TA-managed memory"
    },
    "exploitation_analysis": {
      "preconditions": [
        "corruption of token->db_objs->count or idx (requires prior memory corruption)",
        "attacker ability to influence persistent token DB structures via other flaws"
      ],
      "attack_scenario": "An attacker would need to corrupt internal token DB metadata (count/idx) to make count negative/oversized causing out-of-bounds copy.",
      "impact": "Potential memory corruption within TA (denial-of-service/panic) if metadata is corrupted; not an immediate REE data leak."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "unregister_persistent_object:365-375",
        "recommendation": "Explicitly validate idx <= token->db_objs->count-1 and that computed count is non-negative before using in MemMove."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "idx is validated for < 0 and early-return if invalid",
        "ptr allocation sized from token->db_objs->count before copies"
      ],
      "negative_indicators": [
        "no explicit check that idx <= original count-1 at point of copy (implicit via get_persistent_obj_idx and allocation)",
        "assumes token->db_objs->count consistent and non-malicious"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety appears preserved by idx validation and allocation size calculations; no evidence that REE-tainted input directly controls the copy length at this point, so line is not classified vulnerable under the policy.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Index was checked and buffer allocated based on token->db_objs->count, which constrains the copy length; no direct REE-tainted untrusted input reaches this copy without validation.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "unregister_persistent_object:365-369",
      "evidence": "idx = get_persistent_obj_idx(...); if (idx < 0) return ..."
    },
    {
      "type": "mem_access_check",
      "location": "unregister_persistent_object:371-375",
      "evidence": "TEE_Malloc sized from token->db_objs->count to hold reduced entries"
    }
  ],
  "argument_safety": [
    {
      "arg": "dst =&ptr->uuids[idx]",
      "why_safe": "ptr was allocated to accommodate (token->db_objs->count - 1) UUIDs",
      "evidence": "persistent_token.c:371-375"
    },
    {
      "arg": "src =&token->db_objs->uuids[idx + 1]",
      "why_safe": "idx came from get_persistent_obj_idx which returned -ve for invalid indices",
      "evidence": "persistent_token.c:365-369"
    },
    {
      "arg": "len = count * sizeof(TEE_UUID)",
      "why_safe": "count computed from ptr->count - idx after ptr->count was decremented to reflect removal",
      "evidence": "persistent_token.c:392-396"
    }
  ],
  "residual_risks": [
    "If token->db_objs->count or idx are corrupted by another vulnerability, the copy length could be incorrect leading to memory corruption"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit idx validity check and sized allocation prior to MemMove"
    ],
    "negative_indicators": [
      "lack of an explicit >= check against original count at copy site"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the existing checks and allocation pattern, the MemMove at line 395 is not a direct vulnerable sink under the memory-safety-first policy; residual risk depends on integrity of token metadata.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 371,
      "function": "unregister_persistent_object",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1)*sizeof(TEE_UUID)),src_sz=unknown,dst_sz=sizeof(struct token_persistent_objs)+((token->db_objs->count - 1)*sizeof(TEE_UUID))"
        ]
      },
      "why": "Allocation size for ptr derived from token->db_objs->count; if count is inconsistent this may lead to incorrect sizing for subsequent copies.",
      "code_excerpt": "ptr = TEE_Malloc(sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID)), ...);"
    }
  ]
}
フロー #216: TA_InvokeCommandEntryPoint -> entry_destroy_object -> destroy_object -> unregister_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_destroy_objectdestroy_objectunregister_persistent_objectTEE_MemMove

実行時間: 83.13秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395

パラメータインデックス: 0

解析結果

安全判定理由: Index 'idx' is checked for validity and allocation/size computations ensure the memmove length fits the allocated dst; data copied is TEE-private, so no unencrypted REE output occurs at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from unregister_persistent_object at lines [388, 395, 435, 640]:
-- Call #1 at line 388 --
386: }
387:
388: >>> TEE_MemMove(ptr, token->db_objs,
389: sizeof(struct token_persistent_objs) +
390: idx * sizeof(TEE_UUID));
-- Call #2 at line 395 --
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
-- Call #3 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #4 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 395:
390: idx * sizeof(TEE_UUID));
391:
392: ptr->count--;
393: count = ptr->count - idx;
394:
395: >>> TEE_MemMove(&ptr->uuids[idx],
396: &token->db_objs->uuids[idx + 1],
397: count * sizeof(TEE_UUID));
398:
399: res = TEE_WriteObjectData(db_hdl, ptr,
400: sizeof(struct token_persistent_objs) +

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "ptr",
      "token->db_objs",
      "ptr->uuids",
      "uuid",
      "db_objs->uuids"
    ],
    "propagation": [
      {
        "lhs": "ptr (contents)",
        "rhs": "token->db_objs via TEE_MemMove at persistent_token.c:388",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:388-391"
      },
      {
        "lhs": "&ptr->uuids[idx] (contents)",
        "rhs": "&token->db_objs->uuids[idx + 1] via TEE_MemMove at persistent_token.c:395",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:395-397"
      },
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "uuid via TEE_MemMove at persistent_token.c:435",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:433-435"
      },
      {
        "lhs": "uuid (local)",
        "rhs": "&db_objs->uuids[idx] via TEE_MemMove at persistent_token.c:640",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination 'ptr' is allocated from TEE_Malloc and then written from token->db_objs; copy length depends on idx derived from uuid (REE-influenced handle).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst parameter 'ptr' to caller allocation (TEE_Malloc) at call-site; origin is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, ...);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter 'token->db_objs' (TEE-private) to callee src; contains persistent DB entries.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, ...);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Shifts trailing UUIDs using count computed from ptr->count and idx; count derived from token->db_objs->count read earlier.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst parameter '&ptr->uuids[idx]' to allocated ptr region; destination is TEE-private and index idx is REE-influenced.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=unknown,dst_sz=(ptr->count - idx) * sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], ...);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 395,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter '&token->db_objs->uuids[idx + 1]' to token DB region; source is TEE-private.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=count * sizeof(TEE_UUID),src_sz=(token->db_objs->count - (idx+1)) * sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&ptr->uuids[idx], &token->db_objs->uuids[idx + 1], ...);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Inserts uuid into token->db_objs; destination is token->db_objs and source is uuid local buffer.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst parameter 'token->db_objs->uuids + count' to token DB storage (TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter 'uuid' (local buffer) to callee; uuid may be populated from disk earlier and used to create objects.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Reads uuid from db_objs into uuid local variable; copy length sizeof(*uuid).",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=unknown,dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding dst parameter 'uuid' (local output buffer) to callee; used subsequently to create token object.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=unknown,dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding src parameter '&db_objs->uuids[idx]' to callee; source is token DB region read from disk earlier.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [395]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [395] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      395
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 395,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "copy length computed as count = (ptr->count - idx) where idx was validated by get_persistent_obj_idx and ptr allocated to hold (orig_count-1) UUIDs; source and destination are TEE-private so no REE disclosure path here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {},
  "why_no_vulnerability": "Index 'idx' is checked for validity and allocation/size computations ensure the memmove length fits the allocated dst; data copied is TEE-private, so no unencrypted REE output occurs at this line.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "unregister_persistent_object:365-369",
      "evidence": "idx = get_persistent_obj_idx(token, uuid); if (idx < 0) return PKCS11_RV_NOT_FOUND"
    },
    {
      "type": "allocation_check",
      "location": "unregister_persistent_object:371-375",
      "evidence": "ptr = TEE_Malloc(...); if (!ptr) return PKCS11_CKR_DEVICE_MEMORY"
    }
  ],
  "argument_safety": [
    {
      "arg": "uuid",
      "why_safe": "checked for NULL and used to obtain idx; idx validated",
      "evidence": "unregister_persistent_object:362-366"
    },
    {
      "arg": "&ptr->uuids[idx]",
      "why_safe": "ptr allocated to hold (orig_count-1) UUIDs and count computed relative to ptr->count",
      "evidence": "unregister_persistent_object:371-374,392-396"
    }
  ],
  "residual_risks": [
    "388: initial TEE_MemMove copies token->db_objs using idx-influenced length; if get_persistent_obj_idx is flawed there is a residual risk",
    "399: TEE_WriteObjectData persists modified ptr to storage (dst_region unknown) - ensure write target is trusted"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "idx validated via get_persistent_obj_idx and negative idx handled",
      "allocation size computed and checked, ptr NULL checked",
      "computed count yields non-negative copy_len and fits allocated ptr"
    ],
    "negative_indicators": [
      "get_persistent_obj_idx implementation not inspected here (assumed correct)",
      "database consistency and potential concurrent modifications not analyzed"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (idx validity and allocation sizing) ensure the computed copy length is within the allocated destination and source sizes; the copy is between TA-private regions, so it is not an unencrypted REE output.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 388,
      "function": "unregister_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs) + ((token->db_objs->count - 1) * sizeof(TEE_UUID))"
        ]
      },
      "why": "TEE_MemMove copies DB entries into newly allocated ptr using idx derived from uuid parsed earlier; provenance of uuid is REE-influenced upstream.",
      "code_excerpt": "TEE_MemMove(ptr, token->db_objs, sizeof(struct token_persistent_objs) + idx * sizeof(TEE_UUID));"
    }
  ]
}
フロー #217: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> register_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objectregister_persistent_objectTEE_MemMove

実行時間: 53.65秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435

パラメータインデックス: 0

解析結果

詳細: No memory-safety issue at this call-site (fixed-size copy into properly allocated buffer) and destination is TEE-private (not REE-visible), so the TEE_MemMove at line 435 is not an unencrypted REE output; remaining concerns are structural (persistence of potentially untrusted uuid).

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [435, 640]:
-- Call #1 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #2 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 435:
430: ((count + 1) * sizeof(TEE_UUID)));
431: if (!ptr)
432: return PKCS11_CKR_DEVICE_MEMORY;
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
438: sizeof(struct token_persistent_objs) +
439: count * sizeof(TEE_UUID);
440:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "ptr (token->db_objs) after TEE_Realloc",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:434-435"
      },
      {
        "lhs": "dst (call-site)",
        "rhs": "token->db_objs->uuids + count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "src (call-site)",
        "rhs": "uuid (obj->uuid from caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "n",
        "rhs": "sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      }
    ],
    "sanitizers": [
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-434",
        "evidence": "checks TEE_Realloc return and returns DEVICE_MEMORY on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Destination buffer token->db_objs->uuids+count is TEE-managed memory (realloc result) receiving copied uuid; destination provenance is TEE-private but allocation was recent",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Source uuid passed into TEE_MemMove may originate from obj->uuid (potentially derived from REE-supplied attributes), provenance uncertain",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "The move call writes potentially untrusted uuid bytes into the token index before persisting; persisting later may store REE-derived data",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [435]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [435] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      435
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Fixed-size copy of sizeof(TEE_UUID) into a realloc'ed token->db_objs region whose allocation accounted for (count+1)*sizeof(TEE_UUID); destination is TEE-private and not REE-visible, so not an unencrypted REE leak at this call-site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "uuid (obj->uuid) possibly derived from earlier template deserialization",
      "propagation_path": [
        "template/obj_attrs -> obj->uuid @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c:263-271",
        "create_object(session, head, &obj_handle) call-site -> obj->uuid assigned @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:253-263",
        "register_persistent_object(get_session_token(session), obj->uuid) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:268",
        "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      ],
      "sink": "token->db_objs (persistent index) written via TEE_MemMove then persisted via TEE_WriteObjectData"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies template/attributes leading to controlled obj->uuid or uuid",
        "No upstream integrity checks preventing attacker-controlled uuid"
      ],
      "attack_scenario": "Attacker supplies crafted UUID via object template; UUID is recorded in token persistent index, potentially causing index pollution or tracking information persistence.",
      "impact": "Persistence of attacker-supplied UUID into token database; does not directly disclose TA secrets to REE at this line."
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "register_persistent_object:424-435",
        "recommendation": "Validate provenance and expected format of uuid before inserting into persistent index; reject uuids originating from untrusted templates if not allowed."
      },
      {
        "type": "access_control",
        "location": "create_object:253-263",
        "recommendation": "Ensure template-derived attributes are authorized for persistent objects before creating persistent storage entries."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Fixed, small copy size sizeof(TEE_UUID) (clear from code)",
        "Allocation for token->db_objs explicitly accounts for (count+1)*sizeof(TEE_UUID)",
        "Persistent write path present (TEE_WriteObjectData) but destination is TEE storage"
      ],
      "negative_indicators": [
        "Provenance of uuid is uncertain (may be derived from REE-supplied template)",
        "No explicit validation of uuid contents beyond duplicate check"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "No memory-safety issue at this call-site (fixed-size copy into properly allocated buffer) and destination is TEE-private (not REE-visible), so the TEE_MemMove at line 435 is not an unencrypted REE output; remaining concerns are structural (persistence of potentially untrusted uuid).",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at line 435 is a fixed-size move into TEE-managed memory whose allocation covers the copied size; destination is not REE-visible so it is not an unencrypted output.",
  "effective_sanitizers": [
    {
      "type": "dup_check",
      "location": "register_persistent_object:424-425",
      "evidence": "get_persistent_obj_idx(token, uuid) >= 0 triggers TEE_Panic to avoid duplicates"
    },
    {
      "type": "alloc_check",
      "location": "register_persistent_object:428-434",
      "evidence": "checks TEE_Realloc return and returns DEVICE_MEMORY on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "token (first param)",
      "why_safe": "token is derived from get_session_token(session) and remains in TEE-private memory",
      "evidence": "create_object -> register_persistent_object call @ object.c:268"
    },
    {
      "arg": "uuid (second param)",
      "why_safe": "uuid is a fixed-size TEE_UUID; size-limited copy used, but provenance may be untrusted",
      "evidence": "TEE_MemMove(..., uuid, sizeof(TEE_UUID)) @ persistent_token.c:435"
    }
  ],
  "residual_risks": [
    "Line 435 persists possibly REE-derived uuid into token DB; although not an REE leak, this may allow attacker-controlled persistent entries"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit size constants and allocation accounting present",
      "No tainted length used to bound the copy"
    ],
    "negative_indicators": [
      "Uncertain provenance of uuid (could be REE-derived)",
      "Later persistence stores this data long-term"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and destination-region evidence indicate the call is not a vulnerability under the given policy; remaining concerns are structural and about persistence of possibly untrusted data.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "why": "Copies uuid (provenance uncertain, may be derived from REE-supplied template) into token->db_objs index prior to persistence; this persists potentially untrusted data.",
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "register_persistent_object",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),src_sz=that,dst_sz=disk"
        ]
      },
      "why": "Persists token->db_objs (including uuids array) to storage; persisted data may include bytes originating from untrusted input.",
      "code_excerpt": "TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    }
  ]
}
フロー #218: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> register_persistent_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objectregister_persistent_objectTEE_MemMove

実行時間: 46.08秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435

パラメータインデックス: 0

解析結果

安全判定理由: The copy at line 435 writes a fixed-size UUID into TA-managed storage that was reallocated to the needed size and the data is not REE-visible or classified sensitive.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [435, 640]:
-- Call #1 at line 435 --
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
-- Call #2 at line 640 --
638: goto error;
639:
640: >>> TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));
641:
642: obj = create_token_object(NULL, uuid, token);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 435:
430: ((count + 1) * sizeof(TEE_UUID)));
431: if (!ptr)
432: return PKCS11_CKR_DEVICE_MEMORY;
433:
434: token->db_objs = ptr;
435: >>> TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));
436:
437: size = sizeof(struct token_persistent_main) +
438: sizeof(struct token_persistent_objs) +
439: count * sizeof(TEE_UUID);
440:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "token->db_objs",
      "token->db_objs->uuids",
      "uuid",
      "db_objs",
      "idx"
    ],
    "propagation": [
      {
        "lhs": "token->db_objs",
        "rhs": "ptr (from TEE_Realloc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-434"
      },
      {
        "lhs": "dest (token->db_objs->uuids + count)",
        "rhs": "token->db_objs->uuids + count",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:434-435"
      },
      {
        "lhs": "src (uuid)",
        "rhs": "uuid (caller-provided/generated)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      },
      {
        "lhs": "dest (uuid)",
        "rhs": "uuid (local buffer)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      },
      {
        "lhs": "src (&db_objs->uuids[idx])",
        "rhs": "token->db_objs->uuids array element",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:640"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-435",
        "evidence": "TEE_Realloc grows token->db_objs to hold (count+1) UUIDs before writing at index 'count'"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding call-site dest parameter to token->db_objs->uuids + count (storage just realloc'd); dest originates from TA-managed token storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((count+1)*sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding call-site src parameter to 'uuid' (caller-provided/generated UUID)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((count+1)*sizeof(TEE_UUID))"
        ]
      },
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding call-site dest parameter to local 'uuid' buffer (target for read from persistent list)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=unknown,dst_sz=sizeof(*uuid)"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 640,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding call-site src parameter to &db_objs->uuids[idx] (persistent array element)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*uuid),src_sz=sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(uuid, &db_objs->uuids[idx], sizeof(*uuid));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [435]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [435] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      435
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination token->db_objs was grown via TEE_Realloc to hold (count+1) UUIDs before the copy; both src and dst are TA-private and data is non-sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The copy at line 435 writes a fixed-size UUID into TA-managed storage that was reallocated to the needed size and the data is not REE-visible or classified sensitive.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "register_persistent_object:428-435",
      "evidence": "TEE_Realloc grows token->db_objs to accommodate (count+1) UUIDs before writing at index 'count'"
    },
    {
      "type": "type_validation",
      "location": "register_persistent_object:424-425",
      "evidence": "get_persistent_obj_idx(token, uuid) checked to avoid duplicates (TEE_Panic on >=0)"
    }
  ],
  "argument_safety": [
    {
      "arg": "token->db_objs->uuids + count",
      "why_safe": "Reallocated to contain (count+1) entries before write",
      "evidence": "persistent_token.c:428-435"
    },
    {
      "arg": "uuid",
      "why_safe": "Caller-provided/generated UUID is a fixed-size object (TEE_UUID) copied with sizeof(TEE_UUID)",
      "evidence": "persistent_token.c:435"
    }
  ],
  "residual_risks": [
    "366: prior TEE_MemMove copies rc into params[0].memref.buffer (REE-visible) — separate line evaluated earlier; not applicable to line 435"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Realloc performed to increase buffer before write",
      "Copy length is fixed sizeof(TEE_UUID)",
      "Both src and dst are TA-private storage"
    ],
    "negative_indicators": [
      "If token->db_objs or count were corrupted earlier, realloc/checks might be bypassed (no explicit integrity checks)",
      "Assumes TEE_Realloc succeeded and token->db_objs->count accurately reflects capacity"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (realloc to needed size) and non-REE destination satisfy safety; no evidence of sensitive data flow to REE at this line, so not a vulnerability.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible); structural risk of exposing TA state to REE if semantics change.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies created key handles into caller-provided out buffer (REE-visible); potential information flow to REE depending on handle semantics.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #219: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> register_persistent_object -> TEE_TruncateObjectData
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objectregister_persistent_objectTEE_TruncateObjectData

実行時間: 59.27秒

ターゲットシンク情報

シンク関数: TEE_TruncateObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:445

パラメータインデックス: 1

解析結果

安全判定理由: Size argument is computed from internal structures with allocation checks and duplicate check; the call truncates persistent storage but does not expose secrets to REE or show unchecked bounds causing memory-safety violation at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_TruncateObjectData
プロンプト 中間 (TEE_TruncateObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_TruncateObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [445, 567, 682]:
-- Call #1 at line 445 --
443: goto out;
444:
445: >>> res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));
446: if (res)
447: goto out;
-- Call #2 at line 567 --
565: goto out;
566:
567: >>> res = TEE_TruncateObjectData(hdl, size);
568:
569: out:
-- Call #3 at line 682 --
680: }
681:
682: >>> res = TEE_TruncateObjectData(db_hdl, sizeof(*db_main) +
683: sizeof(*db_objs));
684: if (res)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 445:
440:
441: res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
444:
445: >>> res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));
446: if (res)
447: goto out;
448:
449: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main),
450: TEE_DATA_SEEK_SET);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_TruncateObjectData", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_TruncateObjectData", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_TruncateObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_TruncateObjectData",
    "tainted_vars": [
      "db_hdl",
      "size",
      "token",
      "token->db_objs",
      "ptr",
      "count",
      "res"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:441"
      },
      {
        "lhs": "size",
        "rhs": "sizeof(struct token_persistent_main) + sizeof(struct token_persistent_objs) + count * sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-439"
      },
      {
        "lhs": "ptr -> token->db_objs",
        "rhs": "TEE_Realloc(token->db_objs, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-434"
      },
      {
        "lhs": "token->db_objs->uuids + count",
        "rhs": "uuid copied into db_objs via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:435"
      }
    ],
    "sanitizers": [
      {
        "kind": "dup_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:424-425",
        "evidence": "get_persistent_obj_idx(token, uuid) >= 0 triggers TEE_Panic to avoid duplicates"
      },
      {
        "kind": "alloc_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:431-432",
        "evidence": "checks TEE_Realloc return and returns error on failure"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 445,
      "function": "TEE_TruncateObjectData",
      "rule": "other",
      "why": "db handle returned by open_db_file is passed to TEE_TruncateObjectData; handle provenance is TA-private but call truncates persistent storage making provenance a structural risk",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size+sizeof(TEE_UUID),src_sz=size,dst_sz=storage_size"
        ]
      },
      "code_excerpt": "res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_TruncateObjectData
- target_sink_lines: [445]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [445] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_TruncateObjectData",
    "lines": [
      445
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 445,
      "function": "register_persistent_object",
      "sink_function": "TEE_TruncateObjectData",
      "status": "safe",
      "why": "Truncate is invoked with a size derived from token->db_objs/count which is checked/allocated earlier; no evidence of unchecked out-of-bounds or secret→REE disclosure at this call site.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Size argument is computed from internal structures with allocation checks and duplicate check; the call truncates persistent storage but does not expose secrets to REE or show unchecked bounds causing memory-safety violation at this line.",
  "effective_sanitizers": [
    {
      "type": "dup_check",
      "location": "register_persistent_object:424-425",
      "evidence": "get_persistent_obj_idx(token, uuid) >= 0 triggers TEE_Panic to prevent duplicates"
    },
    {
      "type": "alloc_check",
      "location": "register_persistent_object:428-432",
      "evidence": "checks return of TEE_Realloc and returns DEVICE_MEMORY on failure"
    }
  ],
  "argument_safety": [
    {
      "arg": "db_hdl",
      "why_safe": "db handle obtained from open_db_file and validated by return code before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:441-445"
    },
    {
      "arg": "size",
      "why_safe": "size computed from known struct sizes and count with realloc/alloc checks preceding truncation",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-439,428-434"
    }
  ],
  "residual_risks": [
    "uuid provenance uncertain: obj->uuid may derive from attributes originally supplied by REE and is copied into persistent index earlier (see TEE_MemMove at line 435)",
    "persistent write persists data that may have originated outside TEE; truncation itself is not an information leak but stored content should be validated/sanitized"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "allocation and duplicate checks before resizing/writing",
      "TEE_Realloc return checked",
      "open_db_file result checked before truncate"
    ],
    "negative_indicators": [
      "uuid provenance uncertain (may be REE-derived)",
      "size depends on count and attrs that ultimately originate from templates/deserialization paths"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "No direct memory-safety violation or secret-to-REE disclosure occurs at the truncate call: size is computed from internal structures with prior allocation/duplication checks; therefore the line is not classified as vulnerable under the given rules, though upstream provenance of persisted data remains a structural concern.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "why": "Copies provided uuid into token->db_objs (persistent index) via TEE_MemMove; source uuid provenance uncertain (may be REE-derived)",
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 456,
      "function": "register_persistent_object",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct token_persistent_objs)+token->db_objs->count*sizeof(TEE_UUID),src_sz=that,size=disk"
        ]
      },
      "why": "Writes token->db_objs (including uuids array) to persistent storage; this persists data that may have originated outside TEE",
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, token->db_objs, sizeof(struct token_persistent_objs) + token->db_objs->count * sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 268,
      "function": "register_persistent_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=sizeof(void *),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "callee 'token' parameter is bound to get_session_token(session) at call-site; origin is TA session token structure (provenance across calls is structural risk)",
      "code_excerpt": "rc = register_persistent_object(get_session_token(session), obj->uuid);"
    }
  ]
}
フロー #220: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> register_persistent_object -> TEE_TruncateObjectData
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objectregister_persistent_objectTEE_TruncateObjectData

実行時間: 43.30秒

ターゲットシンク情報

シンク関数: TEE_TruncateObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:445

パラメータインデックス: 1

解析結果

詳細: The truncate call targets TA-private storage and size is derived from TA-managed structures; existing checks (get_persistent_obj_idx, TEE_Realloc NULL check) reduce likelihood of unsafe truncation. No direct REE-visible secret is being written here, so it does not meet promotion criteria for unencrypted_output or a direct memory-safety vulnerability at this line.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_TruncateObjectData
プロンプト 中間 (TEE_TruncateObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_TruncateObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from register_persistent_object at lines [445, 567, 682]:
-- Call #1 at line 445 --
443: goto out;
444:
445: >>> res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));
446: if (res)
447: goto out;
-- Call #2 at line 567 --
565: goto out;
566:
567: >>> res = TEE_TruncateObjectData(hdl, size);
568:
569: out:
-- Call #3 at line 682 --
680: }
681:
682: >>> res = TEE_TruncateObjectData(db_hdl, sizeof(*db_main) +
683: sizeof(*db_objs));
684: if (res)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 445:
440:
441: res = open_db_file(token, &db_hdl);
442: if (res)
443: goto out;
444:
445: >>> res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));
446: if (res)
447: goto out;
448:
449: res = TEE_SeekObjectData(db_hdl, sizeof(struct token_persistent_main),
450: TEE_DATA_SEEK_SET);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_TruncateObjectData", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_TruncateObjectData", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_TruncateObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_TruncateObjectData",
    "tainted_vars": [
      "db_hdl",
      "size",
      "token",
      "token->db_objs",
      "ptr"
    ],
    "propagation": [
      {
        "lhs": "db_hdl",
        "rhs": "open_db_file(token, &db_hdl) -> db_hdl",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:441-445"
      },
      {
        "lhs": "size",
        "rhs": "sizeof(struct token_persistent_main) + sizeof(struct token_persistent_objs) + count * sizeof(TEE_UUID) + sizeof(TEE_UUID)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-445"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:424-425",
        "evidence": "get_persistent_obj_idx(token, uuid) checked and TEE_Panic if >= 0"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:428-432",
        "evidence": "TEE_Realloc checked for NULL and returns error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 445,
      "function": "TEE_TruncateObjectData",
      "rule": "other",
      "why": "Binding of callee handle parameter to caller-local db_hdl obtained from open_db_file; handle is TA-managed object handle",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=undefined,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 445,
      "function": "TEE_TruncateObjectData",
      "rule": "other",
      "why": "Binding of callee length parameter to computed size expression derived from token structures (caller-controlled counts); length influences truncate extent",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size+sizeof(TEE_UUID),src_sz=sizeof(struct token_persistent_main)+sizeof(struct token_persistent_objs)+count*sizeof(TEE_UUID),dst_sz=unknown"
        ]
      },
      "code_excerpt": "res = TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_TruncateObjectData
- target_sink_lines: [445]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [445] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_TruncateObjectData",
    "lines": [
      445
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 445,
      "function": "register_persistent_object",
      "sink_function": "TEE_TruncateObjectData",
      "status": "safe",
      "why": "TEE_TruncateObjectData is called on a TA-managed object handle with a length computed from internal token structures; no REE-visible destination or sensitive TA-secret is written to REE at this call site and allocation/size path checks exist.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "token and internal counts (TA-managed)",
      "propagation_path": [
        "token->db_objs->count <- token (persistent token) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:427",
        "size <- computed expression using count @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-445",
        "TEE_TruncateObjectData(db_hdl, size + sizeof(TEE_UUID)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:445"
      ],
      "sink": "TEE_TruncateObjectData invoked on TA-private storage handle"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker can modify token->db_objs->count via prior operations (requires exploiting other TA logic or persisted data)",
        "no additional checks beyond allocation and index uniqueness were bypassed"
      ],
      "attack_scenario": "If an attacker were able to corrupt token->db_objs->count to an extreme value, TruncateObjectData could be asked to resize storage unexpectedly, potentially causing resource exhaustion or unexpected behavior.",
      "impact": "Denial-of-service or persistent storage corruption if upstream invariants are violated"
    },
    "missing_mitigations": [
      {
        "type": "range_check",
        "location": "register_persistent_object:445",
        "recommendation": "Validate 'count' and computed 'size' against a maximum allowed number of UUIDs before truncating; fail if unreasonable."
      },
      {
        "type": "mem_access_check",
        "location": "register_persistent_object:428-435",
        "recommendation": "Ensure TEE_Realloc growth cannot be influenced to cause integer overflows; validate multiplication/addition of sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size is computed from internal token structures (not direct REE buffer)",
        "TEE_Realloc result is checked and get_persistent_obj_idx prevents duplicates"
      ],
      "negative_indicators": [
        "count is derived from token->db_objs which may reflect persisted state; persistent state could have been influenced previously",
        "exact invariants on 'count' are not asserted beyond allocation success"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The truncate call targets TA-private storage and size is derived from TA-managed structures; existing checks (get_persistent_obj_idx, TEE_Realloc NULL check) reduce likelihood of unsafe truncation. No direct REE-visible secret is being written here, so it does not meet promotion criteria for unencrypted_output or a direct memory-safety vulnerability at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "Call operates on TA-private storage with internal size computation and checks; no evidence of tainted REE input used unchecked to cause an immediate unsafe operation at this line.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "register_persistent_object:424-425",
      "evidence": "get_persistent_obj_idx(token, uuid) checked and TEE_Panic if >= 0"
    },
    {
      "type": "allocation_check",
      "location": "register_persistent_object:428-432",
      "evidence": "TEE_Realloc checked for NULL and returns error"
    }
  ],
  "argument_safety": [
    {
      "arg": "db_hdl",
      "why_safe": "handle originates from open_db_file and is TA-managed",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:441-445"
    },
    {
      "arg": "size",
      "why_safe": "size computed from internal structures and incremented by one UUID; not a direct REE buffer length",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:437-445"
    }
  ],
  "residual_risks": [
    "line 445: if persistent state (token->db_objs->count) can be corrupted via other flows, truncate extent may be manipulated — ensure upstream invariants",
    "structural: TEE_MemMove of UUID into db_objs without explicit bounds beyond realloc/growth (see persistent_token.c:435)"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "internal allocations and checks present",
      "operation targets TA-private storage"
    ],
    "negative_indicators": [
      "persistent data influence on 'count' not fully constrained in this function",
      "no explicit maximum bound on count enforced here"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Given the sink acts on TA-private storage and size is derived from internal state with allocation checks, the line is not classified as vulnerable under the provided rules; structural risks and potential for upstream corruption are noted as residual concerns.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 435,
      "function": "register_persistent_object",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=sizeof(struct token_persistent_objs)+((count+1)*sizeof(TEE_UUID))"
        ]
      },
      "why": "Copies UUID into token->db_objs array; growth and indexing depend on count derived from persistent state — bounds should be validated.",
      "code_excerpt": "TEE_MemMove(token->db_objs->uuids + count, uuid, sizeof(TEE_UUID));"
    }
  ]
}
フロー #221: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> update_persistent_object_attributes -> TEE_WriteObjectData
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valueupdate_persistent_object_attributesTEE_WriteObjectData

実行時間: 75.09秒

ターゲットシンク情報

シンク関数: TEE_WriteObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563

パラメータインデックス: 1

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: caller-provided template data consumed via serialargs -> template -> obj->attributes

シンク: TEE_WriteObjectData writes TA memory to persistent storage using attacker-influenced size

判定理由: Direct use of a size derived from upstream (potentially REE-controlled) attribute length without a validating bounds check before TEE_WriteObjectData constitutes weak input validation and a memory-safety risk; destination is TEE persistent storage (not REE), so information-disclosure promotion does not apply.

信頼度: MEDIUM

LLM対話履歴 (6 メッセージ)

関数: update_persistent_object_attributes
プロンプト 中間 (update_persistent_object_attributes)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “update_persistent_object_attributes” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_set_attribute_value at lines [1068]:
-- Call #1 at line 1068 --
1066:
1067:     	if (get_bool(obj->attributes, PKCS11_CKA_TOKEN)) {
1068: >>> 		rc = update_persistent_object_attributes(obj);
1069:     		if (rc)
1070:     			goto out;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

544: enum pkcs11_rc update_persistent_object_attributes(struct pkcs11_object *obj)
545: {
546: TEE_Result res = TEE_ERROR_GENERIC;
547: TEE_ObjectHandle hdl = TEE_HANDLE_NULL;
548: uint32_t tee_obj_flags = TEE_DATA_FLAG_ACCESS_WRITE;
549: size_t size = 0;
550:
551: assert(obj && obj->attributes);
552:
553: res = TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE,
554: obj->uuid, sizeof(*obj->uuid),
555: tee_obj_flags, &hdl);
556: if (res) {
557: EMSG("OpenPersistent failed %#"PRIx32, res);
558: return tee2pkcs_error(res);
559: }
560:
561: size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:
563: res = TEE_WriteObjectData(hdl, obj->attributes, size);
564: if (res)
565: goto out;
566:
567: res = TEE_TruncateObjectData(hdl, size);
568:
569: out:
570: TEE_CloseObject(hdl);
571: return tee2pkcs_error(res);
572: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_object_attributes",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"update_persistent_object_attributes",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (update_persistent_object_attributes)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "update_persistent_object_attributes",
    "tainted_vars": [
      "obj",
      "obj->attributes",
      "obj->uuid",
      "obj->attributes->attrs_size",
      "size",
      "hdl"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(struct obj_attrs) + obj->attributes->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:561"
      },
      {
        "lhs": "hdl",
        "rhs": "TEE_OpenPersistentObject(TEE_STORAGE_PRIVATE, obj->uuid, sizeof(*obj->uuid), tee_obj_flags, &hdl)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:553-555"
      },
      {
        "lhs": "persistent storage (dest)",
        "rhs": "obj->attributes via TEE_WriteObjectData(hdl, obj->attributes, size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563-564"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:551",
        "evidence": "assert(obj && obj->attributes) ensures non-NULL pointers"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1068,
      "function": "update_persistent_object_attributes",
      "rule": "other",
      "why": "alias of obj pointer from caller passed into callee; origin may include REE-derived attributes bound earlier",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=NA,src_sz=sizeof(*obj),dst_sz=NA"
        ]
      },
      "code_excerpt": "rc = update_persistent_object_attributes(obj);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 561,
      "function": "update_persistent_object_attributes",
      "rule": "weak_input_validation",
      "why": "size computed from obj->attributes->attrs_size (potentially attacker-controlled) is used to write/truncate persistent storage without further validation",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=obj->attributes->attrs_size,dst_sz=size"
        ]
      },
      "code_excerpt": "size = sizeof(struct obj_attrs) + obj->attributes->attrs_size; res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    }
  ]
}

関数: TEE_WriteObjectData
プロンプト 中間 (TEE_WriteObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_WriteObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_object_attributes at lines [563, 693]:
-- Call #1 at line 563 --
561: size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:
563: >>> res = TEE_WriteObjectData(hdl, obj->attributes, size);
564: if (res)
565: goto out;
-- Call #2 at line 693 --
691:
692: db_objs->count = 0;
693: >>> res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));
694: if (res)
695: TEE_Panic(0);

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 563:
558: return tee2pkcs_error(res);
559: }
560:
561: size = sizeof(struct obj_attrs) + obj->attributes->attrs_size;
562:
563: >>> res = TEE_WriteObjectData(hdl, obj->attributes, size);
564: if (res)
565: goto out;
566:
567: res = TEE_TruncateObjectData(hdl, size);
568:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_WriteObjectData", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_WriteObjectData", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_WriteObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_WriteObjectData",
    "tainted_vars": [
      "hdl",
      "db_hdl",
      "buffer",
      "size",
      "obj",
      "obj->attributes",
      "obj->attributes->attrs_size",
      "db_objs"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(struct obj_attrs) + obj->attributes->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:561"
      },
      {
        "lhs": "buffer (arg)",
        "rhs": "obj->attributes (caller-provided structure potentially derived from REE input earlier)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:563"
      },
      {
        "lhs": "buffer (arg)",
        "rhs": "db_objs (local DB struct)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:693"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:551",
        "evidence": "assert(obj && obj->attributes) ensures non-NULL object and attributes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "TEE_WriteObjectData",
      "rule": "weak_input_validation",
      "why": "Writes obj->attributes to persistent storage using size computed from obj->attributes->attrs_size which may be influenced by earlier REE-derived template; size not strongly validated before write",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=obj->attributes->attrs_size,dst_sz=size"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 693,
      "function": "TEE_WriteObjectData",
      "rule": "other",
      "why": "Writes db_objs (TA-local DB structure) to persistent storage; binding of db_objs pointer passed into write",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*db_objs),src_sz=sizeof(*db_objs),dst_sz=sizeof(*db_objs)"
        ]
      },
      "code_excerpt": "res = TEE_WriteObjectData(db_hdl, db_objs, sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_WriteObjectData
- target_sink_lines: [563]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [563] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_WriteObjectData",
    "lines": [
      563
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 563,
      "function": "update_persistent_object_attributes",
      "sink_function": "TEE_WriteObjectData",
      "status": "vulnerable",
      "why": "size computed from obj->attributes->attrs_size (derived earlier from caller-controlled template) is used directly as copy length to write obj->attributes to persistent storage without strong validation, risking out-of-bounds read/write.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-provided template data consumed via serialargs -> template -> obj->attributes",
      "propagation_path": [
        "params[i].memref.buffer -> template (serialargs_alloc_get_attributes) @ object.c:1002",
        "template->attrs_size -> template_size @ object.c:1040",
        "template-derived attributes moved into obj->attributes -> obj passed to update_persistent_object_attributes @ object.c:1068",
        "obj->attributes->attrs_size -> size computed @ persistent_token.c:561",
        "TEE_WriteObjectData(hdl, obj->attributes, size) @ persistent_token.c:563"
      ],
      "sink": "TEE_WriteObjectData writes TA memory to persistent storage using attacker-influenced size"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker supplies crafted template in params memref to set attrs_size to an oversized value",
        "TA accepts template and creates/assigns obj->attributes without enforcing a strict upper bound"
      ],
      "attack_scenario": "A malicious client supplies a template with a large attrs_size causing TEE_WriteObjectData to read beyond the valid obj->attributes buffer, possibly causing memory disclosure, crash, or corruption of persistent storage content.",
      "impact": "Memory corruption, potential disclosure of adjacent TA memory during write, persistent storage corruption, denial-of-service"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "persistent_token.c:561",
        "recommendation": "Validate obj->attributes->attrs_size against an upper bound and ensure obj->attributes buffer length >= computed size before calling TEE_WriteObjectData"
      },
      {
        "type": "type_validation",
        "location": "object.c:1002-1040",
        "recommendation": "Validate template->attrs_size when allocating and copying attributes; reject or clamp unreasonable sizes"
      },
      {
        "type": "mem_access_check",
        "location": "persistent_token.c:563",
        "recommendation": "Ensure the source buffer is fully allocated and accessible for 'size' bytes prior to write"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size is computed from obj->attributes->attrs_size with no further validation before write",
        "upstream template allocation/size originates from caller-provided memref buffer"
      ],
      "negative_indicators": [
        "assert(obj && obj->attributes) ensures non-NULL but not bounds",
        "some serialargs checks exist earlier but do not guarantee validation at this write site"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Direct use of a size derived from upstream (potentially REE-controlled) attribute length without a validating bounds check before TEE_WriteObjectData constitutes weak input validation and a memory-safety risk; destination is TEE persistent storage (not REE), so information-disclosure promotion does not apply.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
        "line": 563,
        "function": "update_persistent_object_attributes",
        "sink_function": "TEE_WriteObjectData",
        "rule_id": "weak_input_validation",
        "why": "size computed from obj->attributes->attrs_size is used unchecked as write length to persistent storage"
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "object.c:551",
      "evidence": "assert(obj && obj->attributes)"
    },
    {
      "type": "bounds_check",
      "location": "object.c:1006-1009",
      "evidence": "serialargs_remaining_bytes check prevents some malformed inputs at parsing time"
    }
  ],
  "argument_safety": [
    {
      "arg": "hdl",
      "why_safe": "opened via TEE_OpenPersistentObject with error handling",
      "evidence": "persistent_token.c:553-556"
    },
    {
      "arg": "obj->attributes",
      "why_safe": "non-NULL by assert but size validity not enforced",
      "evidence": "persistent_token.c:551"
    }
  ],
  "residual_risks": [
    "Line 563 is classified as weak_input_validation (memory-safety). Information-disclosure to REE was considered but not promoted because destination is TEE persistent storage (not REE-visible)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "direct computation of size from attrs_size with no subsequent validation",
      "upstream template originates from REE-controlled param"
    ],
    "negative_indicators": [
      "some upstream checks exist (serialargs_remaining_bytes) but do not guarantee safe size at this call site"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety weakness (unchecked size used in write) presents a plausible vulnerability with medium confidence; remediation should add explicit bounds checks and validate attribute sizes before persistent writes.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1002,
      "function": "entry_set_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "template->attrs_size derived from caller-controlled memref is used to allocate/compute template size without strict upper bounds",
      "code_excerpt": "serialargs_alloc_get_attributes(&ctrlargs, &template); template_size = sizeof(*template) + template->attrs_size;"
    }
  ]
}
フロー #222: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> update_persistent_object_attributes -> TEE_TruncateObjectData
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valueupdate_persistent_object_attributesTEE_TruncateObjectData

実行時間: 62.65秒

ターゲットシンク情報

シンク関数: TEE_TruncateObjectData

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:567

パラメータインデックス: 1

解析結果

脆弱性タイプ: CWE-20

深刻度: MEDIUM

テイントフロー:

ソース: caller-provided params memref buffer -> template (serialargs_alloc_get_attributes)

シンク: TEE_TruncateObjectData called with attacker-influenced size

判定理由: Tainted length/size derived from caller data reaches a critical filesystem/persistent-object truncation API without validation; this meets memory-safety / weak input validation criteria and is plausibly exploitable.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_TruncateObjectData
プロンプト 中間 (TEE_TruncateObjectData)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_TruncateObjectData” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from update_persistent_object_attributes at lines [567, 682]:
-- Call #1 at line 567 --
565: goto out;
566:
567: >>> res = TEE_TruncateObjectData(hdl, size);
568:
569: out:
-- Call #2 at line 682 --
680: }
681:
682: >>> res = TEE_TruncateObjectData(db_hdl, sizeof(*db_main) +
683: sizeof(*db_objs));
684: if (res)

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c

// Call at line 567:
562:
563: res = TEE_WriteObjectData(hdl, obj->attributes, size);
564: if (res)
565: goto out;
566:
567: >>> res = TEE_TruncateObjectData(hdl, size);
568:
569: out:
570: TEE_CloseObject(hdl);
571: return tee2pkcs_error(res);
572: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_TruncateObjectData", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_TruncateObjectData", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_TruncateObjectData)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_TruncateObjectData",
    "tainted_vars": [
      "hdl",
      "size",
      "db_hdl",
      "db_main",
      "db_objs"
    ],
    "propagation": [
      {
        "lhs": "size",
        "rhs": "sizeof(struct obj_attrs) + obj->attributes->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:561"
      },
      {
        "lhs": "size",
        "rhs": "sizeof(*db_main) + sizeof(*db_objs)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:682"
      },
      {
        "lhs": "hdl, db_hdl",
        "rhs": "handles returned by TEE_OpenPersistentObject / related open calls",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:553-555"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:551",
        "evidence": "assert(obj && obj->attributes) ensures non-NULL before use"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 567,
      "function": "TEE_TruncateObjectData",
      "rule": "weak_input_validation",
      "why": "size derived from obj->attributes->attrs_size (potentially attacker-influenced) is passed to TEE_TruncateObjectData without additional validation",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=obj->attributes->attrs_size,dst_sz=size"
        ]
      },
      "code_excerpt": "res = TEE_TruncateObjectData(hdl, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 682,
      "function": "TEE_TruncateObjectData",
      "rule": "weak_input_validation",
      "why": "computed size (sizeof(*db_main)+sizeof(*db_objs)) used to truncate persistent DB object; size provenance should be validated",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(*db_main)+sizeof(*db_objs),src_sz=NA,dst_sz=sizeof(*db_main)+sizeof(*db_objs)"
        ]
      },
      "code_excerpt": "res = TEE_TruncateObjectData(db_hdl, sizeof(*db_main) + sizeof(*db_objs));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_TruncateObjectData
- target_sink_lines: [567]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [567] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_TruncateObjectData",
    "lines": [
      567
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 567,
      "function": "update_persistent_object_attributes",
      "sink_function": "TEE_TruncateObjectData",
      "status": "vulnerable",
      "why": "size passed to TEE_TruncateObjectData is computed from obj->attributes->attrs_size (derived from caller-provided template) with no effective validation, allowing attacker-influenced size to affect truncation.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-20",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "caller-provided params memref buffer -> template (serialargs_alloc_get_attributes)",
      "propagation_path": [
        "params->memref.buffer -> template (serialargs_alloc_get_attributes) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:992-1004",
        "template->attrs_size -> template_size = sizeof(*template) + template->attrs_size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1040",
        "obj->attributes->attrs_size -> size = sizeof(struct obj_attrs) + obj->attributes->attrs_size @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:561",
        "TEE_TruncateObjectData(hdl, size) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:567"
      ],
      "sink": "TEE_TruncateObjectData called with attacker-influenced size"
    },
    "exploitation_analysis": {
      "preconditions": [
        "attacker controls or forges params memref content used by serialargs_alloc_get_attributes",
        "the object is token-backed so update_persistent_object_attributes is invoked"
      ],
      "attack_scenario": "An attacker supplies a crafted template that results in a manipulated attrs_size; when persisted, the TA truncates persistent object data to that attacker-controlled size, causing data loss/corruption or inconsistent state.",
      "impact": "Persistent object corruption or denial of service for token-stored objects; potential downstream logical errors"
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "update_persistent_object_attributes:561-567",
        "recommendation": "Validate template->attrs_size and resultant size against expected maxima and current object size before writing or truncating persistent storage."
      },
      {
        "type": "type_validation",
        "location": "entry_set_attribute_value:1002-1040",
        "recommendation": "Ensure serialargs_alloc_get_attributes validates lengths and limits for attrs_size and template contents before creating attributes."
      },
      {
        "type": "access_control",
        "location": "entry_set_attribute_value:1018-1023",
        "recommendation": "Re-verify privileges and input provenance when modifying token-backed objects; fail-safe on unexpected sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "size is computed directly from obj->attributes->attrs_size with no range checks (line 561)",
        "obj->attributes originates from serialargs_alloc_get_attributes which consumes caller memref (lines ~992-1004)"
      ],
      "negative_indicators": [
        "assert(obj && obj->attributes) ensures non-NULL but not size constraints",
        "no explicit evidence of attacker controlling attrs_size in all contexts"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Tainted length/size derived from caller data reaches a critical filesystem/persistent-object truncation API without validation; this meets memory-safety / weak input validation criteria and is plausibly exploitable.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
        "line": 567,
        "function": "update_persistent_object_attributes",
        "sink_function": "TEE_TruncateObjectData",
        "rule_id": "weak_input_validation",
        "why": "size computed from obj->attributes->attrs_size (sourced from caller template) is used to truncate persistent object without validation."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "update_persistent_object_attributes:551",
      "evidence": "assert(obj && obj->attributes)"
    },
    {
      "type": "bounds_check",
      "location": "entry_set_attribute_value:1006-1009",
      "evidence": "serialargs_remaining_bytes check that returns error if trailing bytes remain"
    }
  ],
  "argument_safety": [
    {
      "arg": "obj",
      "why_safe": "non-NULL guaranteed",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:551"
    },
    {
      "arg": "hdl",
      "why_safe": "checked TEE_OpenPersistentObject result before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c:553-559"
    }
  ],
  "residual_risks": [
    "Line 567 prioritized as weak_input_validation (memory-safety); potential information-disclosure (unencrypted_output) not applicable here because sink is truncate, not REE output."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct data-flow from caller-controlled template to size used by truncation",
      "No range checks on attrs_size prior to write/truncate"
    ],
    "negative_indicators": [
      "Some earlier checks (serialargs_remaining_bytes) exist but do not bound attrs_size meaningfully",
      "Context does not show explicit attacker-controlled input in all call paths"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "A tainted size derived from caller data reaches TEE_TruncateObjectData without validation; truncation of persistent storage based on attacker-influenced size is a weak input validation vulnerability with medium confidence.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 992,
      "function": "entry_set_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template_size"
        ]
      },
      "why": "serialargs_init/alloc consume caller-provided memref buffer and template->attrs_size (from REE) is used to compute template_size without strong validation",
      "code_excerpt": "serialargs_init(&ctrlargs, ctrl->memref.buffer, ctrl->memref.size); serialargs_alloc_get_attributes(&ctrlargs, &template);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/persistent_token.c",
      "line": 563,
      "function": "update_persistent_object_attributes",
      "sink_function": "TEE_WriteObjectData",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=obj->attributes->attrs_size,dst_sz=size"
        ]
      },
      "why": "size computed from obj->attributes->attrs_size (potentially attacker-controlled) is used to write persistent storage without further validation",
      "code_excerpt": "res = TEE_WriteObjectData(hdl, obj->attributes, size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 307,
      "function": "entry_set_attribute_value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctrl->memref.size,src_sz=ctrl->memref.size,dst_sz=unknown"
        ]
      },
      "why": "alias of caller-provided params (memref buffer) passed into callee; params->memref.buffer is REE-origin shared memory",
      "code_excerpt": "rc = entry_set_attribute_value(client, ptypes, params);"
    }
  ]
}
フロー #223: TA_InvokeCommandEntryPoint -> entry_wrap_key -> check_parent_attrs_against_processing -> parent_key_complies_allowed_processings -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keycheck_parent_attrs_against_processingparent_key_complies_allowed_processingsTEE_MemMove

実行時間: 44.10秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1886

パラメータインデックス: 0

解析結果

安全判定理由: The TEE_MemMove at line 1886 copies a fixed 4-byte word into TA-private storage; sanitizers bound iterations by size/sizeof(uint32_t) and there is no evidence this copy writes to REE-visible memory.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from parent_key_complies_allowed_processings at lines [1886, 2380, 2662]:
-- Call #1 at line 1886 --
1884:
1885: for (count = size / sizeof(uint32_t); count; count--) { 1886: >>> TEE_MemMove(&proc, attr, sizeof(uint32_t)); 1887: attr += sizeof(uint32_t); 1888: -- Call #2 at line 2380 -- 2378: struct pkcs11_attribute_head cli_ref = { }; 2379: 2380: >>> TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); 2381: len = sizeof(cli_ref) + cli_ref.size; 2382: -- Call #3 at line 2662 -- 2660: return PKCS11_CKR_DEVICE_MEMORY; 2661: 2662: >>> TEE_MemMove(buffer, value, *sz); 2663: *data = buffer; 2664: file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c // Call at line 1886: 1881: EMSG("unexpected attributes state"); 1882: TEE_Panic(TEE_ERROR_BAD_STATE); 1883: }
1884:
1885: for (count = size / sizeof(uint32_t); count; count--) { 1886: >>> TEE_MemMove(&proc, attr, sizeof(uint32_t)); 1887: attr += sizeof(uint32_t); 1888: 1889: if (proc == proc_id) 1890: return true; 1891: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "proc",
        "rhs": "attr (byte stream from get_attribute_ptr) copied via TEE_MemMove(&proc, attr, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1886"
      },
      {
        "lhs": "cli_ref",
        "rhs": "cur buffer copied via TEE_MemMove(&cli_ref, cur, sizeof(cli_ref))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380"
      },
      {
        "lhs": "buffer",
        "rhs": "value (source) copied via TEE_MemMove(buffer, value, *sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2662"
      }
    ],
    "sanitizers": [
      {
        "kind": "absence_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1876-1879",
        "evidence": "get_attribute_ptr returning NOT_FOUND causes early return, avoiding iteration"
      },
      {
        "kind": "size_arithmetic_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1885",
        "evidence": "Loop uses count = size / sizeof(uint32_t) to bound iterations"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1886,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies 4-byte words from attr buffer (attribute blob) into local proc using length derived from attribute size; relies on attribute contents and size with limited validation.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&proc, attr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Copies a cli_ref struct from 'cur' pointer into local structure without explicit bounds on cur's provenance/remaining buffer length.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=unknown,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies *sz bytes from value into buffer; origin/provenance of value and buffer sizes unclear, risk of overwriting shared memory if buffer is REE-visible.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=unknown,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [1886]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [1886] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      1886
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 1886,
      "function": "parent_key_complies_allowed_processings",
      "sink_function": "TEE_MemMove",
      "status": "not_applicable",
      "why": "Copies 4-byte word from TA-held attribute blob into local stack; destination is TA-private and the copy length is fixed (sizeof(uint32_t)); no REE exfiltration at this call site.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The TEE_MemMove at line 1886 copies a fixed 4-byte word into TA-private storage; sanitizers bound iterations by size/sizeof(uint32_t) and there is no evidence this copy writes to REE-visible memory.",
  "effective_sanitizers": [
    {
      "type": "absence_check",
      "location": "parent_key_complies_allowed_processings:1876-1879",
      "evidence": "If get_attribute_ptr returns NOT_FOUND the function returns true avoiding iteration"
    },
    {
      "type": "size_arithmetic_check",
      "location": "parent_key_complies_allowed_processings:1885",
      "evidence": "Loop bounded by count = size / sizeof(uint32_t)"
    }
  ],
  "argument_safety": [
    {
      "arg": "proc_id",
      "why_safe": "Compared against entries read from attribute blob; proc_id originates from proc_params->id (caller-controlled) so comparison logic remains necessary",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1889-1891"
    },
    {
      "arg": "attr",
      "why_safe": "attr/size obtained from get_attribute_ptr and loop iteration uses size-derived count; however provenance of attribute contents should be trusted only as validated by get_attribute_ptr",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:1876-1886"
    }
  ],
  "residual_risks": [
    "Attribute blob size/content provenance relies on get_attribute_ptr; malformed attribute metadata could cause logic errors elsewhere",
    "While this call does not expose TA secrets to REE, other TEE_MemMove sites copy into/out of REE-visible buffers (see earlier chain) and should be audited"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Fixed copy size sizeof(uint32_t)",
      "Loop bounded by size/sizeof(uint32_t)",
      "get_attribute_ptr handles NOT_FOUND and error cases"
    ],
    "negative_indicators": [
      "Attribute contents and size come from get_attribute_ptr; limited validation of attribute blob structure beyond size division",
      "Provenance of attributes may be TA-private but upstream sources may be influenced by REE via prior parsing"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety precedence: the copy is fixed-size into TA-private storage with iteration bounded by reported size, so no overflow or REE exfiltration at this line; remaining concern is weak input validation of attribute blobs which is reported as a structural risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 1886,
      "function": "parent_key_complies_allowed_processings",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Copies 4-byte words from attribute buffer into local variable using size-derived loop count; relies on attribute blob size/content correctness.",
      "code_excerpt": "TEE_MemMove(&proc, attr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove (callsite)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=unknown,dst_sz=sizeof(cli_ref)"
        ]
      },
      "why": "Copies a cli_ref struct from buffer without explicit provenance/remaining-length validation of source.",
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove (callsite)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=unknown,dst_sz=*sz"
        ]
      },
      "why": "Copies *sz bytes from value into buffer; provenance and sizes unclear, potential overwrite if buffer is REE-visible.",
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    }
  ]
}
フロー #224: TA_InvokeCommandEntryPoint -> entry_set_attribute_value -> check_attrs_against_modification -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_set_attribute_valuecheck_attrs_against_modificationTEE_MemMove

実行時間: 52.51秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: params memref.buffer (REE-visible) → template → head (attrs list)

シンク: TEE_MemMove reading header at cur into local cli_ref

判定理由: Memory-safety concern: a read of sizeof(cli_ref) is performed from a cursor derived from untrusted head->attrs_size without an explicit bounds check ensuring the header fits; this yields a clear out-of-bounds/len-arithmetic risk.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2380, 2662]:
-- Call #1 at line 2380 --
2378: struct pkcs11_attribute_head cli_ref = { };
2379:
2380: >>> TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));
2381: len = sizeof(cli_ref) + cli_ref.size;
2382:
-- Call #2 at line 2662 --
2660: return PKCS11_CKR_DEVICE_MEMORY;
2661:
2662: >>> TEE_MemMove(buffer, value, *sz);
2663: *data = buffer;
2664:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

// Call at line 2380:
2375:
2376:     	for (; cur < end; cur += len) {
2377:     
2378:     		struct pkcs11_attribute_head cli_ref = { };
2379:     
2380: >>> 		TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));
2381:     		len = sizeof(cli_ref) + cli_ref.size;
2382:     
2383:     
2384:     		if (attribute_is_hidden(&cli_ref))
2385:     			return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "n"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "caller-provided destination pointer",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380,2662"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380,2662"
      },
      {
        "lhs": "n",
        "rhs": "caller-provided size argument",
        "site": "call-sites: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380,2662"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination is &cli_ref (local TA stack/TEE-private) bound to callee dst parameter",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=unknown,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source pointer 'cur' is derived from head (attributes list) which originates from REE-visible memory",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "destination 'buffer' passed to callee; buffer likely TA-allocated (TEE-private) but origin uncertain here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=unknown,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "source 'value' passed into callee; origin not clear in this snippet (could be REE or TA)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "reads header via TEE_MemMove from cur (derived from REE) and then uses cli_ref.size to compute len without proving sizeof(cli_ref)+cli_ref.size <= end",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=end - cur,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)); len = sizeof(cli_ref) + cli_ref.size;"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [2380]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [2380] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      2380
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(cli_ref) bytes from cur (derived from head which is REE-supplied) without proving sizeof(cli_ref)+cli_ref.size <= end; cli_ref.size (tainted) is used to compute next len, enabling out-of-bounds read/len arithmetic.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "params memref.buffer (REE-visible) → template → head (attrs list)",
      "propagation_path": [
        "params[0].memref.buffer -> template (serialargs_alloc_get_attributes) @ ta/object.c:1002",
        "template -> head (create_attributes_from_template) @ ta/object.c:1047",
        "head -> cur/end computed (cur = head + sizeof(obj_attrs); end = cur + head->attrs_size) @ ta/pkcs11_attributes.c:2373-2374",
        "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)) reads from cur @ ta/pkcs11_attributes.c:2380"
      ],
      "sink": "TEE_MemMove reading header at cur into local cli_ref"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker-controlled REE input provides head->attrs_size and attribute data such that end - cur < sizeof(cli_ref) or crafted cli_ref.size leads to len arithmetic overflow"
      ],
      "attack_scenario": "Maliciously crafted attributes in caller-supplied memref cause TEE_MemMove to read beyond buffer or create incorrect len, leading to out-of-bounds read and potential memory corruption or info disclosure.",
      "impact": "Out-of-bounds read (and subsequent use of tainted sizes) may cause sensitive TA memory disclosure or control-flow/data corruption."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "check_attrs_against_modification:2380",
        "recommendation": "Verify (size_t)(end - cur) >= sizeof(cli_ref) before TEE_MemMove and validate that sizeof(cli_ref)+cli_ref.size does not overflow and stays within end."
      },
      {
        "type": "range_check",
        "location": "check_attrs_against_modification:2381",
        "recommendation": "After reading cli_ref, validate cli_ref.size against a maximal allowed attribute size and ensure len computation cannot overflow."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Source of cur/end is head->attrs_size derived from REE-provided memref.",
        "TEE_MemMove reads fixed sizeof(cli_ref) at cur before validating cli_ref.size against end."
      ],
      "negative_indicators": [
        "Loop uses cur < end which provides a partial bound but does not guarantee sizeof(cli_ref) fits.",
        "No explicit prior check of end - cur >= sizeof(cli_ref) in visible code."
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety concern: a read of sizeof(cli_ref) is performed from a cursor derived from untrusted head->attrs_size without an explicit bounds check ensuring the header fits; this yields a clear out-of-bounds/len-arithmetic risk.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
        "line": 2380,
        "function": "check_attrs_against_modification",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads sizeof(cli_ref) from cur (derived from REE head) without proving the header fits inside end; cli_ref.size then used to compute len enabling further OOB."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "check_attrs_against_modification:2376",
      "evidence": "for (; cur < end; cur += len) loop uses cur<end as loop bound"
    },
    {
      "type": "type_validation",
      "location": "entry_set_attribute_value:989-991",
      "evidence": "ptypes validated against expected exp_pt"
    }
  ],
  "argument_safety": [
    {
      "arg": "head",
      "why_safe": "partially validated",
      "evidence": "serialargs_remaining_bytes check at object.c:1006 ensures no extra bytes remain, but does not guarantee header-sized reads inside head"
    }
  ],
  "residual_risks": [
    "2380: potential information disclosure (unencrypted_output) not promoted because memory-safety (weak_input_validation) takes precedence and must be fixed first"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct TEE_MemMove from untrusted-derived pointer without explicit size check"
    ],
    "negative_indicators": [
      "Loop bound cur < end provides partial protection but insufficient"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The read at 2380 is a clear memory-safety risk (out-of-bounds/read-length misuse) driven by untrusted attribute length fields; this must be fixed via explicit bounds and overflow checks before any further classification.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2381,
      "function": "check_attrs_against_modification",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref)+cli_ref.size,src_sz=end - cur,dst_sz=unknown"
        ]
      },
      "why": "len computed from cli_ref.size (tainted) is used to advance cur; if cli_ref.size is large or causes overflow, loop arithmetic may go out-of-bounds.",
      "code_excerpt": "len = sizeof(cli_ref) + cli_ref.size;"
    }
  ]
}
フロー #225: TA_InvokeCommandEntryPoint -> entry_copy_object -> check_attrs_against_modification -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_copy_objectcheck_attrs_against_modificationTEE_MemMove

実行時間: 54.22秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: HIGH

テイントフロー:

ソース: Caller-provided attributes buffer (params -> ctrl->memref.buffer)

シンク: TEE_MemMove(&cli_ref, cur, sizeof(cli_ref))

判定理由: Memory-safety precedence: the TEE_MemMove reads a fixed header from a cursor into a caller-supplied buffer without confirming the remaining buffer length, enabling out-of-bounds read (CWE-125); this is a definite vulnerability despite the loop bound.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from check_attrs_against_modification at lines [2380, 2662]:
-- Call #1 at line 2380 --
2378: struct pkcs11_attribute_head cli_ref = { };
2379:
2380: >>> TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));
2381: len = sizeof(cli_ref) + cli_ref.size;
2382:
-- Call #2 at line 2662 --
2660: return PKCS11_CKR_DEVICE_MEMORY;
2661:
2662: >>> TEE_MemMove(buffer, value, *sz);
2663: *data = buffer;
2664:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

// Call at line 2380:
2375:
2376:     	for (; cur < end; cur += len) {
2377:     
2378:     		struct pkcs11_attribute_head cli_ref = { };
2379:     
2380: >>> 		TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));
2381:     		len = sizeof(cli_ref) + cli_ref.size;
2382:     
2383:     
2384:     		if (attribute_is_hidden(&cli_ref))
2385:     			return PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"TEE_MemMove",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "cur",
      "cli_ref",
      "buffer",
      "value",
      "sz"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "caller-provided destination pointer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380"
      },
      {
        "lhs": "src",
        "rhs": "caller-provided source pointer (cur or value)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380,2662"
      },
      {
        "lhs": "len",
        "rhs": "call-site length argument (sizeof(cli_ref) or *sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380,2662"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2376-2376",
        "evidence": "loop condition uses cur < end where end computed from head->attrs_size"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination '&cli_ref' is a TA-local stack object (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2380,
      "function": "TEE_MemMove",
      "rule": "weak_input_validation",
      "why": "Source 'cur' points into attributes built from caller data; copying sizeof(cli_ref) before validating cli_ref.size may allow parsing of malformed/short input",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref),src_sz=head->attrs_size,dst_sz=sizeof(cli_ref)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'buffer' is TA-allocated (likely TEE_Malloc) and thus TA-private",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'value' provenance unclear (could be REE-provided or TA-owned); origin not validated here",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [2380]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [2380] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      2380
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 2380,
      "function": "check_attrs_against_modification",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(cli_ref) from src 'cur' (which points into attributes derived from REE) without verifying remaining bytes >= sizeof(cli_ref), enabling an out-of-bounds read of REE-provided buffer.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "high",
    "taint_flow_summary": {
      "source": "Caller-provided attributes buffer (params -> ctrl->memref.buffer)",
      "propagation_path": [
        "params -> ctrl (entry_copy_object) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1089-1090",
        "ctrl->memref.buffer -> serialargs -> template/head construction : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1108-1118,1163",
        "head (attrs) -> cur/end calculation : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2373-2374",
        "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)) reads from cur : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2380"
      ],
      "sink": "TEE_MemMove(&cli_ref, cur, sizeof(cli_ref))"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed/short attributes buffer via params.ctrl->memref.buffer",
        "head->attrs_size is set such that cur < end but remaining bytes < sizeof(cli_ref)"
      ],
      "attack_scenario": "A crafted params buffer causes the loop to attempt TEE_MemMove of sizeof(cli_ref) from a short src region, leading to read of out-of-range memory and potential crash or information disclosure.",
      "impact": "Out-of-bounds read from untrusted memory may cause TA crash, leak adjacent TA memory, or enable further corruption/exploitation depending on platform behavior."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "check_attrs_against_modification:2376-2381",
        "recommendation": "Before TEE_MemMove(&cli_ref, cur, sizeof(cli_ref)), ensure (end - cur) >= sizeof(cli_ref); validate cli_ref.size against remaining bytes before using it to advance cur."
      },
      {
        "type": "type_validation",
        "location": "entry_copy_object:1108-1120",
        "recommendation": "Validate templates/attrs_size parsed from serialargs to ensure internal consistency and prevent crafted sizes from misleading loop bounds."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Direct TEE_MemMove from cur using fixed sizeof(cli_ref) with loop bound only cur < end",
        "cli_ref.size (attacker-controlled) used to compute next len without prior validation"
      ],
      "negative_indicators": [
        "There is a loop bound cur < end where end computed from head->attrs_size (some protection exists)",
        "sizeof(cli_ref) is small and fixed"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety precedence: the TEE_MemMove reads a fixed header from a cursor into a caller-supplied buffer without confirming the remaining buffer length, enabling out-of-bounds read (CWE-125); this is a definite vulnerability despite the loop bound.",
    "vulnerable_line_count": 1,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
        "line": 2380,
        "function": "check_attrs_against_modification",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "TEE_MemMove reads sizeof(cli_ref) from 'cur' without verifying remaining bytes, enabling out-of-bounds read of attacker-controlled buffer."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "check_attrs_against_modification:2376",
      "evidence": "loop condition uses cur < end where end = (char *)head + sizeof(struct obj_attrs) + head->attrs_size"
    }
  ],
  "argument_safety": [
    {
      "arg": "cur (cursor into head attributes)",
      "why_safe": "partially bounded by end=(start+head->attrs_size) but not checked against sizeof(cli_ref) before TEE_MemMove",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2373-2380"
    }
  ],
  "residual_risks": [
    "Line 2380 memory-safety issue may also enable information disclosure of TA memory if out-of-bounds read returns TA data (memory-safety classification chosen first)."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Exact code pattern with TEE_MemMove and unvalidated cli_ref.size usage",
      "Call chain shows head originates from REE-controlled params"
    ],
    "negative_indicators": [
      "Loop bound cur < end provides partial protection",
      "Copied header size is fixed (sizeof(cli_ref))"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Marked vulnerable due to clear out-of-bounds read condition: fixed-size copy from a cursor derived from untrusted buffer without per-copy remaining-length check; memory-safety dominates and is sufficient to classify as vulnerable.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2381,
      "function": "check_attrs_against_modification",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "weak_input_validation"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_ref)+cli_ref.size,src_sz=head->attrs_size,dst_sz=unknown"
        ]
      },
      "why": "cli_ref.size (from untrusted buffer) is used to compute len for advancing cur without validation against remaining bytes, enabling parsing errors or out-of-bounds advances.",
      "code_excerpt": "len = sizeof(cli_ref) + cli_ref.size;"
    }
  ]
}
フロー #226: TA_InvokeCommandEntryPoint -> entry_wrap_key -> alloc_key_data_to_wrap -> alloc_copy_attribute_value -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keyalloc_key_data_to_wrapalloc_copy_attribute_valueTEE_MemMove

実行時間: 41.57秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2662

パラメータインデックス: 0

解析結果

安全判定理由: The TEE_MemMove at 2662 copies TA-private secret material into a TA-private heap buffer allocated to exactly *sz; destination is not REE-visible and there is no size mismatch, so no direct sink vulnerability at this line.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from alloc_copy_attribute_value at lines [2662]:
-- Call #1 at line 2662 --
2660: return PKCS11_CKR_DEVICE_MEMORY;
2661:
2662: >>> TEE_MemMove(buffer, value, *sz);
2663: *data = buffer;
2664:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

// Call at line 2662:
2657:
2658: buffer = TEE_Malloc(*sz, TEE_USER_MEM_HINT_NO_FILL_ZERO);
2659: if (!buffer)
2660: return PKCS11_CKR_DEVICE_MEMORY;
2661:
2662: >>> TEE_MemMove(buffer, value, *sz);
2663: *data = buffer;
2664:
2665: return PKCS11_CKR_OK;
2666: }
2667:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "buffer",
      "value",
      "*sz",
      "rc"
    ],
    "propagation": [
      {
        "lhs": "buffer",
        "rhs": "TEE_Malloc(*sz, ...) allocated buffer",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2658-2659"
      },
      {
        "lhs": "value",
        "rhs": "get_attribute_ptr(head, PKCS11_CKA_VALUE, &value, sz) -> attribute value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2654-2656"
      },
      {
        "lhs": "buffer (after)",
        "rhs": "copied from value via TEE_MemMove(..., *sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2662"
      }
    ],
    "sanitizers": [
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2655-2656",
        "evidence": "if (rc) return after get_attribute_ptr"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2658-2660",
        "evidence": "if (!buffer) return after TEE_Malloc"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee first parameter (dest) is buffer allocated by TEE_Malloc in this function (TA-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee second parameter (src) aliases attribute value from head (TA-private secret).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: callee third parameter (size) is *sz derived from attribute length (TA-controlled).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=*sz,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2662,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies attribute value (likely secret) into newly allocated TEE-private buffer using *sz; sensitive data flows within TA and is later used for wrapping.",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=*sz,src_sz=*sz,dst_sz=*sz"
        ]
      },
      "code_excerpt": "TEE_MemMove(buffer, value, *sz);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [2662]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [2662] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      2662
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 2662,
      "function": "alloc_copy_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies attribute value into a freshly TEE_Malloc'd TA-private buffer; both src and dest are TEE-private and allocation size is *sz matching the copy length.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The TEE_MemMove at 2662 copies TA-private secret material into a TA-private heap buffer allocated to exactly *sz; destination is not REE-visible and there is no size mismatch, so no direct sink vulnerability at this line.",
  "effective_sanitizers": [
    {
      "type": "null_check",
      "location": "alloc_copy_attribute_value:2654-2656",
      "evidence": "if (rc) return after get_attribute_ptr"
    },
    {
      "type": "null_check",
      "location": "alloc_copy_attribute_value:2658-2660",
      "evidence": "if (!buffer) return after TEE_Malloc"
    }
  ],
  "argument_safety": [
    {
      "arg": "value (src)",
      "why_safe": "Validated via get_attribute_ptr which returns rc on error",
      "evidence": "pkcs11_attributes.c:2654-2656"
    },
    {
      "arg": "buffer (dest)",
      "why_safe": "Allocated with TEE_Malloc(*sz) before copy",
      "evidence": "pkcs11_attributes.c:2658-2659"
    },
    {
      "arg": "size (*sz)",
      "why_safe": "Used consistently to allocate and to bound the copy; no smaller destination observed here",
      "evidence": "pkcs11_attributes.c:2658,2662"
    }
  ],
  "residual_risks": [
    "line 1266: TA-private secret (key_data) produced here is later written into params[2].memref.buffer (REE-visible) by wrap_data_by_symm_enc/wrap_data_by_asymm_enc — potential disclosure if out_buf is REE-shared and not properly limited/encrypted"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "dest allocated with TEE_Malloc(*sz) immediately before copy",
      "get_attribute_ptr checked for error before using value",
      "copy length uses *sz consistently"
    ],
    "negative_indicators": [
      "no explicit extra bounds checks beyond matching allocation size (relies on correct *sz)",
      "downstream flow moves key_data to an out_buf that may be REE-visible (wrap path)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety and confidentiality at the sink line 2662 are preserved: the copy is within a TA-private buffer sized by *sz obtained from the attribute and no overflow or REE-visible destination occurs at this line. However, a separate structural risk exists where wrapped key bytes (derived from this data) may be written to REE-visible memory later.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz (input),src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes (derived from TA-private key_data) into params[2].memref.buffer (REE-visible) using out_size derived from params[2].memref.size without an effective upper bound check on that path.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    }
  ]
}
フロー #227: TA_InvokeCommandEntryPoint -> entry_wrap_key -> alloc_key_data_to_wrap -> encode_rsa_private_key_der -> mbedtls_pk_write_key_der
安全
TA_InvokeCommandEntryPointentry_wrap_keyalloc_key_data_to_wrapencode_rsa_private_key_dermbedtls_pk_write_key_der

実行時間: 64.32秒

ターゲットシンク情報

シンク関数: mbedtls_pk_write_key_der

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743

パラメータインデックス: 1

解析結果

詳細: The mbedtls call at 2743 operates purely on TA-private memory with error checks; therefore it is not itself an unencrypted-output to REE. However the produced secret flows later to code that may write to REE-visible memory, so structural risks remain.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: mbedtls_pk_write_key_der
プロンプト 中間 (mbedtls_pk_write_key_der)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “mbedtls_pk_write_key_der” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from encode_rsa_private_key_der at lines [2743]:
-- Call #1 at line 2743 --
2741: }
2742:
2743: >>> mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);
2744:     	if (mbedtls_rc < 0) {
2745:     		rc = PKCS11_CKR_ARGUMENTS_BAD;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c

// Call at line 2743:
2738:     	if (!buffer) {
2739:     		rc = PKCS11_CKR_DEVICE_MEMORY;
2740:     		goto out;
2741:     	}
2742:     
2743: >>> 	mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);
2744:     	if (mbedtls_rc < 0) {
2745:     		rc = PKCS11_CKR_ARGUMENTS_BAD;
2746:     		goto out;
2747:     	}
2748:     

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has `rule_matches.others` with the 5 tags in the exact order: `flow_dir:...`, `src_region:...`, `dst_region:...`, `sensitivity_label:...`, `size_triplet:...`.

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "mbedtls_pk_write_key_der",
    "tainted_vars": ["<var>", ...],
    "propagation": [
      {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"}
    ],
    "sanitizers": [
      {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"}
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file":"<path|unknown>",
      "line":<int|0>,
      "function":"mbedtls_pk_write_key_der",
      "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>",
      "why":"<one‑line reason>",
      "sink_function":"<'='|'array_write'|<callee>|'unknown'>",
      "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]},
      "code_excerpt":"<short optional>"
    }
    // zero or more
  ]
}
LLM応答 中間 (mbedtls_pk_write_key_der)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "mbedtls_pk_write_key_der",
    "tainted_vars": [
      "pk",
      "buffer",
      "der_size",
      "mbedtls_rc",
      "n,p,q,d,e",
      "rsa"
    ],
    "propagation": [
      {
        "lhs": "mbedtls_rc",
        "rhs": "mbedtls_pk_write_key_der(&pk, buffer, der_size) return value",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743"
      },
      {
        "lhs": "buffer (contents)",
        "rhs": "written by mbedtls_pk_write_key_der(&pk, buffer, der_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2743"
      }
    ],
    "sanitizers": [
      {
        "kind": "call_return_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c:2744-2747",
        "evidence": "checks if mbedtls_rc < 0 and treats as error"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2743,
      "function": "mbedtls_pk_write_key_der",
      "rule": "other",
      "why": "Call-site binding: callee 'pk' parameter is local mbedtls_pk_context (TA-private) used to produce DER key bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=der_size"
        ]
      },
      "code_excerpt": "mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2743,
      "function": "mbedtls_pk_write_key_der",
      "rule": "other",
      "why": "Call-site binding: callee 'buffer' parameter is TA-allocated buffer (TEE_Malloc) and will receive private-key DER bytes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=unknown,dst_sz=der_size"
        ]
      },
      "code_excerpt": "mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2743,
      "function": "mbedtls_pk_write_key_der",
      "rule": "other",
      "why": "Call-site binding: callee 'der_size' parameter is caller-provided allocation size (der_size) controlling how many bytes may be written.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=unknown,dst_sz=der_size"
        ]
      },
      "code_excerpt": "mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2743,
      "function": "mbedtls_pk_write_key_der",
      "rule": "other",
      "why": "Writes private-key DER into TA-private buffer; sensitive data produced and returned to caller via *data/*sz in caller.",
      "sink_function": "mbedtls_pk_write_key_der",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "code_excerpt": "mbedtls_rc = mbedtls_pk_write_key_der(&pk, buffer, der_size);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: mbedtls_pk_write_key_der
- target_sink_lines: [2743]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [2743] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "mbedtls_pk_write_key_der",
    "lines": [
      2743
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 2743,
      "function": "encode_rsa_private_key_der",
      "sink_function": "mbedtls_pk_write_key_der",
      "status": "not_applicable",
      "why": "This call writes private-key DER into a TA-private buffer (TEE_Malloc'd); the call itself does not write to REE-visible memory and return/error is checked.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TA-private key attributes (CKA_MODULUS, CKA_PRIVATE_EXPONENT, etc.)",
      "propagation_path": [
        "key->attributes -> encode_rsa_private_key_der @ pkcs11_attributes.c:2698-2715",
        "mbedtls_pk_write_key_der writes DER into buffer @ pkcs11_attributes.c:2743",
        "buffer returned via *data/*sz to caller alloc_key_data_to_wrap @ pkcs11_attributes.c:2755-2756",
        "key_data returned to entry_wrap_key and later passed to wrap_data_by_* which writes to params[2].memref.buffer (REE-visible) @ processing.c:1266-1275"
      ],
      "sink": "mbedtls_pk_write_key_der call (produces DER) and subsequent functions that may copy to REE"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker controls or triggers a PKCS#11 operation to wrap a private key",
        "TA execution reaches wrap path that ultimately writes wrapped bytes to REE-visible memref"
      ],
      "attack_scenario": "Private-key material is serialized into a buffer then eventually wrapped and written to REE-visible output if wrapping allows extraction; exploit requires other checks to permit extraction/wrapping.",
      "impact": "Potential disclosure of private key material to the Normal World if later steps write TA-private secret into REE-visible memory without proper access control or encryption."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "entry_wrap_key:processing.c:1229-1236",
        "recommendation": "Ensure keys marked non-extractable are never exported; enforce and check EXTRACTABLE and WRAP_WITH_TRUSTED invariants early and consistently."
      },
      {
        "type": "bounds_check",
        "location": "encode_rsa_private_key_der:pkcs11_attributes.c:2750-2753",
        "recommendation": "Ensure per-byte copy loop bounds align with mbedtls_rc and buffer length; use memmove with explicit lengths or validated indices."
      },
      {
        "type": "type_validation",
        "location": "processing.c:1266",
        "recommendation": "Validate out_buf/out_size against key_sz before passing TA-private data into wrapping routines that may write to REE-visible buffers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Trace shows private key attributes read and serialized into a TA buffer then returned to caller context",
        "Later code uses key_data and passes out_buf/out_size that may be REE-visible"
      ],
      "negative_indicators": [
        "mbedtls_pk_write_key_der writes into TA-private buffer (not directly to REE)",
        "alloc and return checks and mbedtls return-value checks exist at this site"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "The mbedtls call at 2743 operates purely on TA-private memory with error checks; therefore it is not itself an unencrypted-output to REE. However the produced secret flows later to code that may write to REE-visible memory, so structural risks remain.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The targeted call writes into a TA-private buffer and has return/error checks; no direct REE-visible write occurs at this line.",
  "effective_sanitizers": [
    {
      "type": "call_return_check",
      "location": "pkcs11_attributes.c:2744-2747",
      "evidence": "checks if mbedtls_rc < 0 and treats as error"
    },
    {
      "type": "alloc_check",
      "location": "pkcs11_attributes.c:2737-2741",
      "evidence": "checks buffer != NULL and returns on allocation failure"
    },
    {
      "type": "type_validation",
      "location": "pkcs11_attributes.c:2726-2734",
      "evidence": "mbedtls_rsa_complete / check_privkey checked and returns on error"
    }
  ],
  "argument_safety": [
    {
      "arg": "buffer",
      "why_safe": "Allocated with der_size and checked for NULL before use",
      "evidence": "pkcs11_attributes.c:2736-2739"
    },
    {
      "arg": "der_size",
      "why_safe": "Computed from modulus length and used to size allocation; caller provides it to mbedtls",
      "evidence": "pkcs11_attributes.c:2736-2737"
    }
  ],
  "residual_risks": [
    "1266:TA-private key_data may be written into REE-visible params[2].memref.buffer later via wrap_data_by_symm_enc/asyymmetric, enabling disclosure if wrapping yields plaintext or buffer handling is unsafe"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct evidence of private key components read and serialized",
      "Subsequent calls use produced buffer for operations that write to REE-visible memory"
    ],
    "negative_indicators": [
      "This line operates on TA-private memory with allocation and error checks",
      "No direct REE write at this call site"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Line 2743 is not a vulnerability by itself (no REE-visible write and has checks). Structural risks elsewhere in the chain could lead to disclosure but are separate issues.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2750,
      "function": "encode_rsa_private_key_der",
      "sink_function": "array_write",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "why": "Per-byte loop moves DER bytes to buffer front and zeroes tail; requires correct bounds (mbedtls_rc vs der_size).",
      "code_excerpt": "for (i = 0; i < mbedtls_rc; i++) { buffer[i] = buffer[i + start]; buffer[i + start] = 0; }"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/pkcs11_attributes.c",
      "line": 2737,
      "function": "encode_rsa_private_key_der",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=mbedtls_rc,src_sz=der_size,dst_sz=der_size"
        ]
      },
      "why": "Allocates TA-private buffer to hold sensitive private-key DER and returns it via out parameters; sensitive data becomes available to caller context.",
      "code_excerpt": "buffer = TEE_Malloc(der_size, ...); *data = buffer; *sz = mbedtls_rc;"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Wrapped key bytes written into params[2].memref.buffer (REE-visible) using out_size derived from caller-provided params[2].memref.size; sensitive TA-private key_data may reach REE.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies rc into caller-provided params[0].memref.buffer (REE-visible); structural binding from TA to REE.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #228: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_rsa_keys -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_rsa_keysTEE_MemMove

実行時間: 54.19秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:708

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks guarantee copy length matches destination size; destination is not REE-visible so no unencrypted output of sensitive TA data occurs at this line.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from generate_rsa_keys at lines [708]:
-- Call #1 at line 708 --
706: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
707:
708: >>> TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));
709:
710: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c

// Call at line 708:
703: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr,
704: &a_size);
705: if (rc != PKCS11_CKR_OK || a_size != sizeof(uint32_t))
706: return PKCS11_CKR_TEMPLATE_INCONSISTENT;
707:
708: >>> TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));
709:
710: rc = get_attribute_ptr(*pub_head, PKCS11_CKA_PUBLIC_EXPONENT, &a_ptr,
711: &a_size);
712: if (rc != PKCS11_CKR_OK && rc != PKCS11_RV_NOT_FOUND)
713: return rc;

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "a_ptr",
      "a_size",
      "modulus_bits"
    ],
    "propagation": [
      {
        "lhs": "modulus_bits",
        "rhs": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t))",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:708"
      },
      {
        "lhs": "a_ptr",
        "rhs": "get_attribute_ptr(*pub_head, PKCS11_CKA_MODULUS_BITS, &a_ptr, &a_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-705"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-706",
        "evidence": "Checks rc == PKCS11_CKR_OK and a_size == sizeof(uint32_t) before using a_ptr"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases local modulus_bits (TEE-private) passed as &modulus_bits into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter aliases a_ptr which was obtained from attribute template; provenance unclear (could be REE-derived or TA-allocated)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=a_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Copies bytes from a_ptr into local modulus_bits; source provenance uncertain though size was validated to sizeof(uint32_t)",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=a_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [708]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [708] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      708
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 708,
      "function": "generate_rsa_keys",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Length a_size validated equals sizeof(uint32_t) before call and destination is a local TEE-private variable (&modulus_bits); no bounds/overflow issue and not copying TA-private secret to REE here.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-0",
    "severity": "low",
    "taint_flow_summary": {
      "source": "a_ptr from get_attribute_ptr(*pub_head, CKA_MODULUS_BITS)",
      "propagation_path": [
        "get_attribute_ptr -> a_ptr @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-705",
        "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:708"
      ],
      "sink": "TEE_MemMove into local modulus_bits (TEE-private)"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malformed attribute data originating from a_ptr despite size check"
      ],
      "attack_scenario": "Not applicable: size validated and destination is local scalar; cannot overflow destination with validated fixed-size copy",
      "impact": "None from this line alone"
    },
    "missing_mitigations": [
      {
        "type": "type_validation",
        "location": "processing_rsa.c:703-706",
        "recommendation": "Keep and maintain the existing explicit size/type checks before memcpy-like calls"
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit check that a_size == sizeof(uint32_t) before copy",
        "Destination is local TEE-private scalar (&modulus_bits)"
      ],
      "negative_indicators": [
        "Provenance of a_ptr is uncertain (could be derived from REE-provided templates)"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks guarantee copy length matches destination size; destination is not REE-visible so no unencrypted output of sensitive TA data occurs at this line.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The call copies a validated 4-byte attribute into a local 4-byte variable; there is a prior size/type check and the destination is TEE-private.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "processing_rsa.c:703-706",
      "evidence": "rc == PKCS11_CKR_OK and a_size == sizeof(uint32_t) before TEE_MemMove"
    }
  ],
  "argument_safety": [
    {
      "arg": "a_ptr",
      "why_safe": "size a_size checked equals sizeof(uint32_t) before use",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c:703-706"
    }
  ],
  "residual_risks": [
    "a_ptr provenance is unknown; if a_ptr originates from REE and later flows to a REE-visible output elsewhere, that other sink may disclose data"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit size check",
      "local destination"
    ],
    "negative_indicators": [
      "uncertain provenance of a_ptr"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line-level memory-safety and sensitivity checks make this specific TEE_MemMove not vulnerable; structural risks elsewhere (e.g., copying handles to REE) remain relevant.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_rsa.c",
      "line": 708,
      "function": "generate_rsa_keys",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=a_size,dst_sz=sizeof(uint32_t)"
        ]
      },
      "why": "Source a_ptr provenance uncertain though size validated; copy into local modulus_bits may be safe but upstream origin unknown.",
      "code_excerpt": "TEE_MemMove(&modulus_bits, a_ptr, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); structural risk of exposing handles to REE.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}
フロー #229: TA_InvokeCommandEntryPoint -> entry_wrap_key -> wrap_data_by_symm_enc -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_wrap_keywrap_data_by_symm_encTEE_MemMove

実行時間: 87.18秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1078

パラメータインデックス: 0

解析結果

詳細: Memory-safety checks and allocation size bound the copy length; the operation copies TA-private material into TA-private temporary buffer, so this line is not an information-disclosure sink to REE and is not a bounds-vulnerability.

信頼度: HIGH

LLM対話履歴 (6 メッセージ)

関数: wrap_data_by_symm_enc
プロンプト 中間 (wrap_data_by_symm_enc)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “wrap_data_by_symm_enc” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_wrap_key at lines [1266]:
-- Call #1 at line 1266 --
1264: goto out;
1265:
1266: >>> rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf,
1267: &out_size);
1268: } else {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c

1033: enum pkcs11_rc wrap_data_by_symm_enc(struct pkcs11_session *session,
1034: void *data, uint32_t data_sz,
1035: void *out_buf, uint32_t *out_sz)
1036: { 1037: TEE_Result res = TEE_ERROR_GENERIC; 1038: struct active_processing *proc = session->processing; 1039: void *in_buf = NULL; 1040: uint32_t align = 0; 1041: uint32_t in_sz = data_sz; 1042: size_t tmp_sz = *out_sz; 1043: uint8_t *tmp_buf = out_buf; 1044: 1045: switch (proc->mecha_type) { 1046: case PKCS11_CKM_AES_ECB: 1047: case PKCS11_CKM_AES_CBC: 1048: align = data_sz % TEE_AES_BLOCK_SIZE; 1049: if (align) 1050: in_sz = data_sz + (TEE_AES_BLOCK_SIZE - align); 1051: 1052: if (*out_sz < in_sz) { 1053: *out_sz = in_sz; 1054: return PKCS11_CKR_BUFFER_TOO_SMALL; 1055: } 1056: 1057: if (align) { 1058: if (data_sz > TEE_AES_BLOCK_SIZE) { 1059: in_sz = data_sz - align; 1060: res = TEE_CipherUpdate(proc->tee_op_handle, 1061: data, in_sz, tmp_buf, 1062: &tmp_sz); 1063: if (res) { 1064: assert(res != TEE_ERROR_SHORT_BUFFER); 1065: return tee2pkcs_error(res); 1066: } 1067: tmp_buf += tmp_sz; 1068: tmp_sz = *out_sz - tmp_sz; 1069: } else { 1070: in_sz = 0; 1071: } 1072: 1073: in_buf = TEE_Malloc(TEE_AES_BLOCK_SIZE, 1074: TEE_MALLOC_FILL_ZERO); 1075: if (!in_buf) 1076: return PKCS11_CKR_DEVICE_MEMORY; 1077: 1078: TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align); 1079: in_sz = TEE_AES_BLOCK_SIZE; 1080: } else { 1081: in_buf = data; 1082: in_sz = data_sz; 1083: } 1084: 1085: res = TEE_CipherDoFinal(proc->tee_op_handle, in_buf, in_sz, 1086: tmp_buf, &tmp_sz); 1087: if (res == TEE_SUCCESS || res == TEE_ERROR_SHORT_BUFFER) { 1088: *out_sz = tmp_sz; 1089: if (align) 1090: *out_sz += tmp_buf - (uint8_t *)out_buf; 1091: } 1092: 1093: if (align) 1094: TEE_Free(in_buf); 1095: 1096: return tee2pkcs_error(res); 1097: default: 1098: return PKCS11_CKR_MECHANISM_INVALID; 1099: } 1100: 1101: return PKCS11_CKR_GENERAL_ERROR; 1102: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "wrap_data_by_symm_enc", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"wrap_data_by_symm_enc", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (wrap_data_by_symm_enc)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "wrap_data_by_symm_enc",
    "tainted_vars": [
      "session",
      "data",
      "data_sz",
      "out_buf",
      "out_sz",
      "tmp_buf",
      "in_buf",
      "tmp_sz",
      "proc->mecha_type"
    ],
    "propagation": [
      {
        "lhs": "in_sz",
        "rhs": "data_sz (+ padding if align)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1041-1050"
      },
      {
        "lhs": "tmp_sz",
        "rhs": "*out_sz (initially)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1042-1043"
      },
      {
        "lhs": "tmp_buf",
        "rhs": "out_buf",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1043-1044"
      },
      {
        "lhs": "*out_sz",
        "rhs": "in_sz (when *out_sz < in_sz branch sets *out_sz = in_sz)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1052-1054"
      },
      {
        "lhs": "tmp_buf content",
        "rhs": "TEE_CipherUpdate/TEE_CipherDoFinal(proc->tee_op_handle, in_buf/ data, ...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1060-1066,1085-1089"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1052-1055",
        "evidence": "If (*out_sz < in_sz) { *out_sz = in_sz; return BUFFER_TOO_SMALL; }"
      },
      {
        "kind": "null_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1073-1076",
        "evidence": "TEE_Malloc return checked for in_buf"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1266,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Call-site binding: 'session' passed from caller; origin tied to TA session (unknown region here).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1266,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Call-site binding: 'key_data' passed from caller; originates from TA-private key material (sensitive).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=key_sz,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1266,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Call-site binding: 'key_sz' scalar provided by caller-path; size influences copies.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1266,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Call-site binding: 'out_buf' aliases caller-provided params[2].memref.buffer (REE-visible shared).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=params[2].memref.size"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 1266,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Call-site binding: '&out_size' aliases params[2].memref.size (REE-tainted) allowing callee to read/modify REE-provided length.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=4,src_sz=4,dst_sz=unknown"
        ]
      },
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c",
      "line": 1052,
      "function": "wrap_data_by_symm_enc",
      "rule": "other",
      "why": "Potential disclosure: cipher output is written into out_buf (caller-owned REE-visible) from TA-private key material; there is a bounds check that may prevent overflow.",
      "sink_function": "TEE_CipherDoFinal",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=in_sz,src_sz=data_sz,dst_sz=*out_sz (params[2].memref.size)"
        ]
      },
      "code_excerpt": "res = TEE_CipherDoFinal(proc->tee_op_handle, in_buf, in_sz, tmp_buf, &tmp_sz);"
    }
  ]
}

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from wrap_data_by_symm_enc at lines [1078]:
-- Call #1 at line 1078 --
1076: return PKCS11_CKR_DEVICE_MEMORY;
1077:
1078: >>> TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);
1079: in_sz = TEE_AES_BLOCK_SIZE;
1080: } else {

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c

// Call at line 1078:
1073: in_buf = TEE_Malloc(TEE_AES_BLOCK_SIZE,
1074: TEE_MALLOC_FILL_ZERO);
1075: if (!in_buf)
1076: return PKCS11_CKR_DEVICE_MEMORY;
1077:
1078: >>> TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);
1079: in_sz = TEE_AES_BLOCK_SIZE;
1080: } else {
1081: in_buf = data;
1082: in_sz = data_sz;
1083: }

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "in_buf",
      "data",
      "in_sz",
      "align"
    ],
    "propagation": [
      {
        "lhs": "in_buf (dest)",
        "rhs": "(uint8_t *)data + in_sz (source slice)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1078"
      },
      {
        "lhs": "copy_len",
        "rhs": "align (computed from data_sz % TEE_AES_BLOCK_SIZE)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c:1048-1050,1078"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c",
      "line": 1078,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination in_buf is TEE_Malloc'd buffer (TA-private) receiving data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=align,src_sz=unknown,dst_sz=TEE_AES_BLOCK_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c",
      "line": 1078,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source is (uint8_t *)data + in_sz aliasing caller-provided TA-private data (sensitive key material).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=align,src_sz=data_sz,dst_sz=TEE_AES_BLOCK_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_symm.c",
      "line": 1078,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: length argument 'align' derived from data_sz % TEE_AES_BLOCK_SIZE (tainted by data_sz).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=align,src_sz=data_sz,dst_sz=TEE_AES_BLOCK_SIZE"
        ]
      },
      "code_excerpt": "TEE_MemMove(in_buf, (uint8_t *)data + in_sz, align);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [1078]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [1078] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      1078
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 1078,
      "function": "wrap_data_by_symm_enc",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Dest in_buf is TEE_Malloc'd with size TEE_AES_BLOCK_SIZE and copy length 'align' ≤ TEE_AES_BLOCK_SIZE (derived from data_sz % block_size); malloc null-checked prior to call.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE‑000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "TA-private key_data (upstream)",
      "propagation_path": [
        "key_data -> wrap_data_by_symm_enc @ processing.c:1266",
        "data (param) -> copy source (uint8_t*)data + in_sz -> TEE_MemMove @ processing_symm.c:1078"
      ],
      "sink": "Local TA-private buffer in_buf (allocated via TEE_Malloc) written via TEE_MemMove"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Control of data_sz to manipulate align",
        "In_buf allocation must not have been tampered"
      ],
      "attack_scenario": "An attacker controlling data_sz could attempt to force an out-of-bounds copy, but align is strictly <= TEE_AES_BLOCK_SIZE and in_buf was allocated to that size.",
      "impact": "Low — local TA memory copy; no direct REE exposure on this line"
    },
    "missing_mitigations": [
      {
        "type": "mem_access_check",
        "location": "processing_symm.c:1073-1078",
        "recommendation": "Keep explicit bounds assertions documenting invariants (e.g., assert(align <= TEE_AES_BLOCK_SIZE)) to aid future reviewers."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "in_buf allocated to TEE_AES_BLOCK_SIZE immediately before use",
        "align computed as data_sz % TEE_AES_BLOCK_SIZE ensuring align ≤ block size",
        "TEE_Malloc null-checked"
      ],
      "negative_indicators": [
        "data_sz provenance originates from TA-private key_sz but upstream checks on key_sz sizes relative to buffers are spread across call chain"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety checks and allocation size bound the copy length; the operation copies TA-private material into TA-private temporary buffer, so this line is not an information-disclosure sink to REE and is not a bounds-vulnerability.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "The copy at 1078 writes at most one AES block into a malloc'd block of AES block size with checks, so no tainted-driven overflow or REE disclosure occurs on this line.",
  "effective_sanitizers": [
    {
      "type": "mem_access_check",
      "location": "processing_symm.c:1052-1055",
      "evidence": "If (*out_sz < in_sz) { *out_sz = in_sz; return PKCS11_CKR_BUFFER_TOO_SMALL; }"
    },
    {
      "type": "mem_access_check",
      "location": "processing_symm.c:1073-1076",
      "evidence": "in_buf = TEE_Malloc(TEE_AES_BLOCK_SIZE,...); if (!in_buf) return"
    }
  ],
  "argument_safety": [
    {
      "arg": "in_buf",
      "why_safe": "Allocated to TEE_AES_BLOCK_SIZE immediately before use",
      "evidence": "processing_symm.c:1073-1076"
    },
    {
      "arg": "(uint8_t*)data + in_sz",
      "why_safe": "source slice length computed as 'align' which is data_sz % TEE_AES_BLOCK_SIZE and bounded ≤ block size",
      "evidence": "processing_symm.c:1048-1050,1078"
    },
    {
      "arg": "align",
      "why_safe": "Derived via modulo of block size, small bounded value",
      "evidence": "processing_symm.c:1048-1050"
    }
  ],
  "residual_risks": [
    "Line 1266: wrap_data_by_symm_enc writes wrapped key bytes into params[2].memref.buffer (REE-visible) — potential unencrypted secret exposure if upstream sanitizers insufficient",
    "Line 366: TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc)) writes TA rc into REE-visible buffer (public), low sensitivity but structural"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "local allocation and size math bound the copy",
      "explicit checks earlier in function"
    ],
    "negative_indicators": [
      "upstream forking of sizes and REE-visible out_buf means other lines carry disclosure risk (but not 1078)"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Line-level analysis shows the TEE_MemMove at 1078 is a bounded copy into a TA-private temporary buffer with prior checks and allocation, so it is not vulnerable; structural risks elsewhere remain.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 1266,
      "function": "entry_wrap_key",
      "sink_function": "wrap_data_by_symm_enc",
      "rule_matches": {
        "rule_id": [
          "shared_memory_overwrite"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:secret",
          "size_triplet:copy_len=key_sz,src_sz=key_sz,dst_sz=params[2].memref.size"
        ]
      },
      "why": "Writes wrapped key bytes into REE-visible params[2].memref.buffer with out_size derived from caller buffer size; TA-private key material may be exposed if caller buffer is REE-controlled.",
      "code_excerpt": "rc = wrap_data_by_symm_enc(session, key_data, key_sz, out_buf, &out_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local rc into caller-provided memref.buffer (REE-visible); rc is non-sensitive but this is a structural REE write.",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    }
  ]
}
フロー #230: TA_InvokeCommandEntryPoint -> entry_generate_secret -> create_object -> TEE_CreatePersistentObject
安全
TA_InvokeCommandEntryPointentry_generate_secretcreate_objectTEE_CreatePersistentObject

実行時間: 58.08秒

ターゲットシンク情報

シンク関数: TEE_CreatePersistentObject

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257

パラメータインデックス: 1

解析結果

安全判定理由: The call writes TA-managed attributes into secure persistent storage (TEE); destination is TEE-private not REE-visible and sanitizers/validation steps exist upstream.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_CreatePersistentObject
プロンプト 中間 (TEE_CreatePersistentObject)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_CreatePersistentObject” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [257]:
-- Call #1 at line 257 --
255: goto err;
256:
257: >>> res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE,
258: obj->uuid, sizeof(TEE_UUID),
259: tee_obj_flags,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at line 257:
252:
253: rc = create_object_uuid(get_session_token(session), obj);
254: if (rc)
255: goto err;
256:
257: >>> res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE,
258: obj->uuid, sizeof(TEE_UUID),
259: tee_obj_flags,
260: TEE_HANDLE_NULL,
261: obj->attributes, size,
262: &obj->attribs_hdl);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_CreatePersistentObject", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_CreatePersistentObject", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_CreatePersistentObject)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_CreatePersistentObject",
    "tainted_vars": [
      "TEE_STORAGE_PRIVATE",
      "obj->uuid",
      "tee_obj_flags",
      "TEE_HANDLE_NULL",
      "obj->attributes",
      "size",
      "&obj->attribs_hdl",
      "res"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid (arg)",
        "rhs": "obj->uuid from obj created earlier",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257"
      },
      {
        "lhs": "obj->attributes (arg)",
        "rhs": "obj->attributes populated from head/template",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257"
      },
      {
        "lhs": "&obj->attribs_hdl (arg)",
        "rhs": "address of obj->attribs_hdl to receive handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257"
      },
      {
        "lhs": "res",
        "rhs": "return value of TEE_CreatePersistentObject(...)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257-263"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "obj->uuid (UUID) pointer from TA object passed into storage API; origin is TA-managed but provenance may include earlier REE-derived data",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=sizeof(TEE_UUID),dst_sz=storage"
        ]
      },
      "code_excerpt": "TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE, obj->uuid, sizeof(TEE_UUID), tee_obj_flags, TEE_HANDLE_NULL, obj->attributes, size, &obj->attribs_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "obj->attributes buffer (derived from template/head) passed to persistent-create; may contain REE-derived attribute bytes copied into TA storage",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=storage"
        ]
      },
      "code_excerpt": "..., obj->attributes, size, ..."
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "address of obj->attribs_hdl passed to API to receive handle; callee will write TA object handle into this location (caller stack/obj)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=sizeof(TEE_ObjectHandle)"
        ]
      },
      "code_excerpt": "&obj->attribs_hdl"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_CreatePersistentObject
- target_sink_lines: [257]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [257] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_CreatePersistentObject",
    "lines": [
      257
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 257,
      "function": "create_object",
      "sink_function": "TEE_CreatePersistentObject",
      "status": "safe",
      "why": "Data passed (obj->attributes, obj->uuid) are written into TA persistent storage (TEE-private); no evidence this call exposes secrets to REE and prior code performs template/attribute validation.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call writes TA-managed attributes into secure persistent storage (TEE); destination is TEE-private not REE-visible and sanitizers/validation steps exist upstream.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_secret:222-224",
      "evidence": "checks ptypes == expected types and out->memref.size == sizeof(obj_handle)"
    },
    {
      "type": "type_validation",
      "location": "entry_generate_secret:251-257",
      "evidence": "check_mechanism_against_processing validates mechanism"
    },
    {
      "type": "validation",
      "location": "entry_generate_secret:263-275",
      "evidence": "create_attributes_from_template and check_created_attrs validate template-derived attributes"
    }
  ],
  "argument_safety": [
    {
      "arg": "obj->attributes",
      "why_safe": "Validated/created from template and checked by create_attributes_from_template/check_created_attrs before persistent write",
      "evidence": "processing.c:263-275"
    },
    {
      "arg": "obj->uuid",
      "why_safe": "Generated by create_object_uuid prior to use",
      "evidence": "object.c:253-255"
    },
    {
      "arg": "&obj->attribs_hdl",
      "why_safe": "callee returns handle into caller-provided location; writing into TA object field",
      "evidence": "object.c:261-263,285-286"
    }
  ],
  "residual_risks": [
    "obj->attributes may originate from REE-deserialized template earlier; while written to TEE storage, maliciously crafted attributes could lead to persistent object content with attacker-controlled bytes"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "destination is TEE persistent storage (not REE-visible)",
      "upstream template/attribute validation functions are invoked before call",
      "UUID is generated/assigned before storage"
    ],
    "negative_indicators": [
      "obj->attributes ultimately derive from deserialized REE-controlled template (source provenance partially unknown)",
      "no explicit bounds check shown at the exact call site validating 'size' against a safe maximum"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "TEE_CreatePersistentObject at line 257 writes into secure storage (TEE-private). Although attributes may originate from REE-deserialized input, upstream validation functions (create_attributes_from_template, check_created_attrs) and object UUID creation provide reasonable sanitization; there is no evidence this call exposes sensitive plaintext to REE, so it is not classified as vulnerable for unencrypted output or memory-safety at this line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 263,
      "function": "entry_generate_secret",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+attrs_size,src_sz=template-derived,dst_sz=sizeof(struct obj_attrs)+attrs_size"
        ]
      },
      "why": "Attributes/template bytes deserialized from REE are used to create head which is later stored persistently; this is a structural risk as origin is partly REE-controlled.",
      "code_excerpt": "rc = create_attributes_from_template(&head, template, template_size, ...);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "create_object",
      "sink_function": "TEE_CreatePersistentObject",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=size,dst_sz=storage"
        ]
      },
      "why": "Persistent object creation copies obj->attributes into secure storage; if attributes contain attacker-controlled bytes (from earlier deserialization) this could persist attacker data.",
      "code_excerpt": "TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 310,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=template-derived,dst_sz=sizeof(struct obj_attrs)+attrs_size"
        ]
      },
      "why": "head (obj_attrs) passed into create_object may contain REE-derived fields; it's a structural binding risk between caller and callee.",
      "code_excerpt": "rc = create_object(session, head, &obj_handle);"
    }
  ]
}
フロー #231: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> create_object -> TEE_CreatePersistentObject
安全
TA_InvokeCommandEntryPointentry_generate_key_paircreate_objectTEE_CreatePersistentObject

実行時間: 54.31秒

ターゲットシンク情報

シンク関数: TEE_CreatePersistentObject

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257

パラメータインデックス: 1

解析結果

安全判定理由: The call persists TA data into secure storage (not REE-visible); upstream validations (ptypes/size checks, serialargs checks, attribute creation) reduce risk of malformed sizes reaching this call.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_CreatePersistentObject
プロンプト 中間 (TEE_CreatePersistentObject)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_CreatePersistentObject” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from create_object at lines [257]:
-- Call #1 at line 257 --
255: goto err;
256:
257: >>> res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE,
258: obj->uuid, sizeof(TEE_UUID),
259: tee_obj_flags,

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at line 257:
252:
253: rc = create_object_uuid(get_session_token(session), obj);
254: if (rc)
255: goto err;
256:
257: >>> res = TEE_CreatePersistentObject(TEE_STORAGE_PRIVATE,
258: obj->uuid, sizeof(TEE_UUID),
259: tee_obj_flags,
260: TEE_HANDLE_NULL,
261: obj->attributes, size,
262: &obj->attribs_hdl);

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_CreatePersistentObject", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_CreatePersistentObject", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_CreatePersistentObject)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_CreatePersistentObject",
    "tainted_vars": [
      "obj->uuid",
      "obj->attributes",
      "size",
      "obj->attribs_hdl",
      "tee_obj_flags",
      "session",
      "head"
    ],
    "propagation": [
      {
        "lhs": "obj->uuid",
        "rhs": "created by create_object_uuid(get_session_token(session), obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:253-255"
      },
      {
        "lhs": "size",
        "rhs": "sizeof(struct obj_attrs) + obj->attributes->attrs_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:247-249"
      },
      {
        "lhs": "obj->attribs_hdl",
        "rhs": "output parameter passed to TEE_CreatePersistentObject",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:257-263"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "Binding of callee parameter for UUID to obj->uuid which was produced in-TA by create_object_uuid (server-side origin); ensure provenance accounted for.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_UUID),src_sz=unknown,dst_sz=sizeof(TEE_UUID)"
        ]
      },
      "code_excerpt": "res = TEE_CreatePersistentObject(..., obj->uuid, sizeof(TEE_UUID), ..., obj->attributes, size, &obj->attribs_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "Binding of callee parameter for initial object data to obj->attributes; attributes originate from templates parsed earlier (REE-derived then processed), so provenance is mixed/uncertain.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=size,src_sz=unknown,dst_sz=size"
        ]
      },
      "code_excerpt": "res = TEE_CreatePersistentObject(..., obj->uuid, sizeof(TEE_UUID), ..., obj->attributes, size, &obj->attribs_hdl);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 257,
      "function": "TEE_CreatePersistentObject",
      "rule": "other",
      "why": "Binding of callee out-parameter attribs handle to &obj->attribs_hdl (TA-private storage) so kernel will write back into TA-owned field.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(TEE_ObjectHandle),src_sz=unknown,dst_sz=sizeof(obj->attribs_hdl)"
        ]
      },
      "code_excerpt": "res = TEE_CreatePersistentObject(..., obj->attributes, size, &obj->attribs_hdl);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_CreatePersistentObject
- target_sink_lines: [257]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [257] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_CreatePersistentObject",
    "lines": [
      257
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 257,
      "function": "create_object",
      "sink_function": "TEE_CreatePersistentObject",
      "status": "safe",
      "why": "Call writes TA-managed obj->attributes into TEE persistent storage (kernel side); destination is not REE-visible and upstream code performs type/size checks on templates and attributes.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "The call persists TA data into secure storage (not REE-visible); upstream validations (ptypes/size checks, serialargs checks, attribute creation) reduce risk of malformed sizes reaching this call.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_generate_key_pair:412-413",
      "evidence": "ptypes compared to expected exp_pt and out->memref.size compared to out_ref_size"
    },
    {
      "type": "bounds_check",
      "location": "entry_generate_key_pair:433-436",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) checked"
    },
    {
      "type": "type_validation",
      "location": "create_object:238-246",
      "evidence": "get_bool(head, PKCS11_CKA_TOKEN) branches persistent handling"
    }
  ],
  "argument_safety": [
    {
      "arg": "obj->uuid",
      "why_safe": "UUID generated in-TA by create_object_uuid before the call",
      "evidence": "object.c:253-255"
    },
    {
      "arg": "obj->attributes/size",
      "why_safe": "attributes constructed via create_attributes_from_template with earlier checks; serialargs parsing validated",
      "evidence": "processing.c:425-473, create_object:247-249"
    },
    {
      "arg": "&obj->attribs_hdl",
      "why_safe": "out parameter is TA-local handle storage",
      "evidence": "object.c:262-263,285-286"
    }
  ],
  "residual_risks": [
    "257: obj->attributes size originates from templates that were parsed from REE-provided data; although validators exist, malformed templates could still cause unexpected size values reaching the kernel call"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "upstream ptypes/type checks at entry_generate_key_pair",
      "serialargs remaining-bytes check",
      "attributes created via dedicated helper with checks"
    ],
    "negative_indicators": [
      "obj->attributes size ultimately derived from parsed templates (REE-origin) so provenance is mixed",
      "no explicit size cap immediately adjacent to the TEE_CreatePersistentObject call"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "TEE_CreatePersistentObject persists data into TEE storage (not REE-visible), upstream code includes several validation steps for ptypes, serialargs, and attribute creation; therefore no direct unencrypted-REE exposure or obvious memory-safety violation at this callsite was found, but provenance of attributes is mixed so residual risk remains.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 555,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though handles are non-sensitive",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 366,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(rc),src_sz=sizeof(rc),dst_sz=params[0].memref.size"
        ]
      },
      "why": "Copies local enum rc into caller-provided memref.buffer (REE-visible) via TEE_MemMove; destination is shared/REE-visible though rc is non-sensitive",
      "code_excerpt": "TEE_MemMove(params[0].memref.buffer, &rc, sizeof(rc));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 225,
      "function": "create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(struct obj_attrs)+head->attrs_size,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "obj created from template head that ultimately originated from REE-parsed attributes; provenance mixed and size depends on head->attrs_size",
      "code_excerpt": "obj = create_obj_instance(head, NULL);"
    }
  ]
}
フロー #232: TA_InvokeCommandEntryPoint -> entry_create_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_create_objectTEE_MemMove

実行時間: 116.06秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:390

パラメータインデックス: 0

解析結果

詳細: Memory-safety check (out->memref.size == sizeof(obj_handle)) prevents overflow/overread and obj_handle is not sensitive, so the copy is not an unencrypted sensitive leak nor a bounds violation.

信頼度: HIGH

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_create_object at lines [390, 693, 832, 839, 854, 886, 910, 966, 1209, 1237]:
-- Call #1 at line 390 --
388: head = NULL;
389:
390: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
391: out->memref.size = sizeof(obj_handle);
392:
-- Call #2 at line 693 --
691: for (count = 0; ctx->next < ctx->count && count < out_count;
692: ctx->next++, count++)
693: >>> TEE_MemMove(out_handles + count * sizeof(uint32_t),
694: ctx->handles + ctx->next, sizeof(uint32_t));
695:
-- Call #3 at line 832 --
830:
831:
832: >>> TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));
833:
834: len = sizeof(*cli_ref) + cli_head.size;
-- Call #4 at line 839 --
837: if (attribute_is_hidden(&cli_head)) { 838: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 839: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 840: sizeof(cli_head.size)); 841: attr_type_invalid = 1; -- Call #5 at line 854 -- 852: if (!attribute_is_exportable(&cli_head, obj)) { 853: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 854: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 855: sizeof(cli_head.size)); 856: attr_sensitive = 1; -- Call #6 at line 886 -- 884: } 885: 886: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 887: sizeof(cli_head.size)); 888: }
-- Call #7 at line 910 --
908:
909:
910: >>> TEE_MemMove(out->memref.buffer, template, out->memref.size);
911:
912: DMSG("PKCS11 session %"PRIu32": get attributes %#"PRIx32,
-- Call #8 at line 966 --
964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size +
965: sizeof(struct obj_attrs);
966: >>> TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));
967:
968: return PKCS11_CKR_OK;
-- Call #9 at line 1209 --
1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
-- Call #10 at line 1237 --
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at line 390:
385: * object is now referred from obj_handle. This allows smooth pass
386: * through free at function exit.
387: */
388: head = NULL;
389:
390: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
391: out->memref.size = sizeof(obj_handle);
392:
393: DMSG("PKCS11 session %"PRIu32": import object %#"PRIx32,
394: session->handle, obj_handle);
395:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "n",
      "out->memref.buffer",
      "obj_handle",
      "out_handles",
      "ctx->handles",
      "cli_ref",
      "cli_head",
      "template",
      "obj_size",
      "head_new",
      "obj->attributes"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "call-site argument (varies by call)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:390"
      },
      {
        "lhs": "src",
        "rhs": "&obj_handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:390"
      },
      {
        "lhs": "dest",
        "rhs": "out_handles + count * sizeof(uint32_t)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693"
      },
      {
        "lhs": "src",
        "rhs": "ctx->handles + ctx->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693"
      },
      {
        "lhs": "dest",
        "rhs": "&cli_head",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832"
      },
      {
        "lhs": "src",
        "rhs": "cli_ref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:321-323",
        "evidence": "checks ptypes == expected and out->memref.size == sizeof(obj_handle)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases caller-provided out->memref.buffer (REE-visible) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 390,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is address of local obj_handle (TEE-private) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases out_handles + count*sizeof(uint32_t); origin unclear at call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=sizeof(uint32_t),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter aliases ctx->handles + ctx->next; origin unclear (could be TEE-private or derived from REE).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 832,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter is &cli_head (local stack variable, TEE-private) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 832,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is cli_ref which likely points into caller-provided serialized attributes (REE-visible); treated as shared.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 839,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter is &cli_ref->size which aliases caller-provided attribute area (REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 839,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is &cli_head.size (TEE-private local), copied into potentially REE-visible storage.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 854,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter is &cli_ref->size (attribute in caller area, REE-visible).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 854,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is &cli_head.size (TEE-private) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 886,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter is &cli_ref->size (REE-visible attribute area) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:unknown",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 886,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source is &cli_head.size (TEE-private) copied into caller-visible attr field.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases out->memref.buffer (REE-visible) for attribute copy.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template?unknown:dynamically_computed,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is template which was allocated/filled earlier (likely TEE-private).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template_size,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases out->memref.buffer (REE-visible) receiving obj_size.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is &obj_size (TEE-private local), copied to caller-visible buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter is head_new which is likely TEE-allocated (uncertain), origin ambiguous.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is obj->attributes (object-internal storage, TEE-private) at this call-site.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination parameter aliases out->memref.buffer (REE-visible) for returning obj_handle.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source parameter is &obj_handle (TEE-private local) copied into REE-visible buffer.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [390]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [390] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      390
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 390,
      "function": "entry_create_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination out->memref.size was validated earlier to equal sizeof(obj_handle) and the copied value is a non-sensitive local handle (obj_handle).",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-000",
    "severity": "low",
    "taint_flow_summary": {
      "source": "caller-provided params (out->memref.buffer) REE-visible",
      "propagation_path": [
        "params -> out (params+2) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:309",
        "out->memref.size checked == sizeof(obj_handle) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:321-323",
        "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle)) @ /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:390"
      ],
      "sink": "TEE_MemMove to caller-provided out->memref.buffer"
    },
    "exploitation_analysis": {
      "preconditions": [
        "malicious REE sets out->memref.buffer to point to attacker-controlled memory (allowed by REE->TA memref) and provides ptypes matching expected",
        "no further authorization checks beyond size/type validation"
      ],
      "attack_scenario": "An attacker supplies a memref that is accepted; TA writes obj_handle into that REE-visible buffer — writes a public handle back to REE.",
      "impact": "Low — only writes a non-sensitive object handle back to REE; not leaking secrets or causing memory corruption due to size check."
    },
    "missing_mitigations": [
      {
        "type": "access_control",
        "location": "entry_create_object:unknown",
        "recommendation": "Ensure caller is authorized to create objects and receive handles; validate session ownership where applicable."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "Explicit check out->memref.size == sizeof(obj_handle) before copy",
        "obj_handle is produced within TA (local) and used as a handle (non-secret)"
      ],
      "negative_indicators": [
        "Destination buffer origin is REE-visible (shared) — structural risk present if sensitivity changed upstream",
        "Some call-sites of TEE_MemMove copy other buffers whose origins are ambiguous"
      ],
      "confidence_level": "high"
    },
    "decision_rationale": "Memory-safety check (out->memref.size == sizeof(obj_handle)) prevents overflow/overread and obj_handle is not sensitive, so the copy is not an unencrypted sensitive leak nor a bounds violation.",
    "vulnerable_line_count": 0,
    "vulnerable_lines": []
  },
  "why_no_vulnerability": "A precise size/type validation for out->memref was performed prior to the TEE_MemMove and the copied data is non-sensitive, preventing both memory-safety and information-disclosure issues at this line.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_create_object:321-323",
      "evidence": "if (!client || ptypes != exp_pt || out->memref.size != sizeof(obj_handle)) return PKCS11_CKR_ARGUMENTS_BAD;"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "Size validated to equal sizeof(obj_handle) before write",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:321-323"
    },
    {
      "arg": "&obj_handle",
      "why_safe": "Source is TA-local non-sensitive handle",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:377-390"
    }
  ],
  "residual_risks": [
    "Line 390 writes TA-generated values into REE-visible memory; if future changes make obj_handle sensitive, this would become an exposure.",
    "Other TEE_MemMove call-sites copy attribute data from REE into TA locals and back; attributes originating from REE are untrusted and require careful validation."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit pre-copy size/type check matching copy size",
      "Source value (obj_handle) appears non-sensitive"
    ],
    "negative_indicators": [
      "Destination buffer is REE-visible (shared) by design",
      "Some call-sites have ambiguous origins/sizes requiring separate review"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "The dominant memory-safety check prevents overflows and the data copied is public handle material; therefore no vulnerability at this sink line.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 206,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=0,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Caller binds params (TEE_Param array) and client pointer into callee entry_create_object; origins/authorization ambiguous.",
      "code_excerpt": "rc = entry_create_object(client, ptypes, params);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "entry_create_object",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template_size,dst_sz=out->memref.size"
        ]
      },
      "why": "TEE_MemMove copies template (TA-private) into caller-provided out->memref.buffer; need to ensure attributes are allowed to be exported.",
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 832,
      "function": "some_helper",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "why": "TEE_MemMove reads client-supplied attribute header into TA-local cli_head; ctrl data is untrusted and must be validated.",
      "code_excerpt": "TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));"
    }
  ]
}
フロー #233: TA_InvokeCommandEntryPoint -> entry_find_objects -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_find_objectsTEE_MemMove

実行時間: 35.40秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693

パラメータインデックス: 0

解析結果

安全判定理由: Writes are bounded by out_count computed from out->memref.size and ptypes were validated; data copied are handles (public) not TA-private secrets.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_find_objects at lines [693, 832, 839, 854, 886, 910, 966, 1209, 1237]:
-- Call #1 at line 693 --
691: for (count = 0; ctx->next < ctx->count && count < out_count;
692: ctx->next++, count++)
693: >>> TEE_MemMove(out_handles + count * sizeof(uint32_t),
694: ctx->handles + ctx->next, sizeof(uint32_t));
695:
-- Call #2 at line 832 --
830:
831:
832: >>> TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));
833:
834: len = sizeof(*cli_ref) + cli_head.size;
-- Call #3 at line 839 --
837: if (attribute_is_hidden(&cli_head)) { 838: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 839: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 840: sizeof(cli_head.size)); 841: attr_type_invalid = 1; -- Call #4 at line 854 -- 852: if (!attribute_is_exportable(&cli_head, obj)) { 853: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 854: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 855: sizeof(cli_head.size)); 856: attr_sensitive = 1; -- Call #5 at line 886 -- 884: } 885: 886: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 887: sizeof(cli_head.size)); 888: }
-- Call #6 at line 910 --
908:
909:
910: >>> TEE_MemMove(out->memref.buffer, template, out->memref.size);
911:
912: DMSG("PKCS11 session %"PRIu32": get attributes %#"PRIx32,
-- Call #7 at line 966 --
964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size +
965: sizeof(struct obj_attrs);
966: >>> TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));
967:
968: return PKCS11_CKR_OK;
-- Call #8 at line 1209 --
1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
-- Call #9 at line 1237 --
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at line 693:
688: if (!ctx)
689: return PKCS11_CKR_OPERATION_NOT_INITIALIZED;
690:
691: for (count = 0; ctx->next < ctx->count && count < out_count;
692: ctx->next++, count++)
693: >>> TEE_MemMove(out_handles + count * sizeof(uint32_t),
694: ctx->handles + ctx->next, sizeof(uint32_t));
695:
696:
697: out->memref.size = count * sizeof(uint32_t);
698:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dst",
      "src",
      "len",
      "out_handles",
      "ctx->handles",
      "count",
      "ctx->next"
    ],
    "propagation": [
      {
        "lhs": "dst",
        "rhs": "out_handles + count * sizeof(uint32_t)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693"
      },
      {
        "lhs": "src",
        "rhs": "ctx->handles + ctx->next",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693-694"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(uint32_t)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:693-694"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:691-694",
        "evidence": "loop condition enforces count < out_count limiting number of sizeof(uint32_t) writes"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination pointer argument aliases caller-provided out_handles (REE-visible memref) allowing TA->REE writes.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:REE-visible",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=unknown,dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 693,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: source pointer argument references TA-private ctx->handles (internal), aliased into memcpy source.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(uint32_t),src_sz=ctx->count*sizeof(uint32_t),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out_handles + count * sizeof(uint32_t), ctx->handles + ctx->next, sizeof(uint32_t));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [693]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [693] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      693
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 693,
      "function": "entry_find_objects",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies fixed sizeof(uint32_t) items from TA-private ctx->handles to caller-provided out buffer but loop bounds limit writes to out_count derived from out->memref.size; no sensitive data flow evidence.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Writes are bounded by out_count computed from out->memref.size and ptypes were validated; data copied are handles (public) not TA-private secrets.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_find_objects:671-672",
      "evidence": "ptypes compared against expected exp_pt; returns ARGUMENTS_BAD if mismatch"
    },
    {
      "type": "bounds_check",
      "location": "entry_find_objects:691-694",
      "evidence": "loop condition enforces count < out_count limiting number of sizeof(uint32_t) writes"
    },
    {
      "type": "range_check",
      "location": "entry_find_objects:674-675",
      "evidence": "out_count = out->memref.size / sizeof(uint32_t); out_handles = out->memref.buffer"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size-derived bound (out_count) enforced before writes",
      "evidence": "object.c:674,691-694"
    },
    {
      "arg": "ctx->handles",
      "why_safe": "source is TA-internal handles (not marked sensitive)",
      "evidence": "object.c:686-694"
    }
  ],
  "residual_risks": [
    "If out->memref.size is corrupted between validation and loop (not observed here) or concurrently modified, bounds may be influenced by REE; ensure caller-controlled size isn't changed concurrently."
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ptypes check at function entry",
      "out_count computed from out->memref.size and used in loop bound",
      "fixed small copy size sizeof(uint32_t)"
    ],
    "negative_indicators": [
      "dst is REE-visible memref (shared) so mis-sized out->memref.size could affect writes if upstream validation bypassed",
      "no explicit per-iteration remaining-bytes check on destination pointer arithmetic"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks (ptype validation and loop bound using out_count) prevent overflow; data copied are non-sensitive handles so no unencrypted_output applies.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/entry.c",
      "line": 295,
      "function": "TA_InvokeCommandEntryPoint",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ptr,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "why": "Alias: params (caller-provided TEE_Param array) passed into entry_find_objects, creating REE-visible buffers reachable by later writes.",
      "code_excerpt": "rc = entry_find_objects(client, ptypes, params);"
    }
  ]
}
フロー #234: TA_InvokeCommandEntryPoint -> entry_get_attribute_value -> TEE_MemMove
脆弱性あり
TA_InvokeCommandEntryPointentry_get_attribute_valueTEE_MemMove

実行時間: 92.02秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832, 839, 854, 886, 910

パラメータインデックス: 0

解析結果

脆弱性タイプ: CWE-125

深刻度: MEDIUM

テイントフロー:

ソース: REE-provided params -> parsed 'template' buffer

シンク: TEE_MemMove calls at lines [832,839,854,886,910] performing reads/writes based on unverified lengths

判定理由: Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.

信頼度: MEDIUM

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_attribute_value at lines [832, 839, 854, 886, 910, 966, 1209, 1237]:
-- Call #1 at line 832 --
830:
831:
832: >>> TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));
833:
834: len = sizeof(*cli_ref) + cli_head.size;
-- Call #2 at line 839 --
837: if (attribute_is_hidden(&cli_head)) { 838: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 839: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 840: sizeof(cli_head.size)); 841: attr_type_invalid = 1; -- Call #3 at line 854 -- 852: if (!attribute_is_exportable(&cli_head, obj)) { 853: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 854: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 855: sizeof(cli_head.size)); 856: attr_sensitive = 1; -- Call #4 at line 886 -- 884: } 885: 886: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 887: sizeof(cli_head.size)); 888: }
-- Call #5 at line 910 --
908:
909:
910: >>> TEE_MemMove(out->memref.buffer, template, out->memref.size);
911:
912: DMSG("PKCS11 session %"PRIu32": get attributes %#"PRIx32,
-- Call #6 at line 966 --
964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size +
965: sizeof(struct obj_attrs);
966: >>> TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));
967:
968: return PKCS11_CKR_OK;
-- Call #7 at line 1209 --
1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
-- Call #8 at line 1237 --
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at lines [832, 839, 854, 886, 910]:
827: struct pkcs11_attribute_head *cli_ref = (void *)cur;
828: struct pkcs11_attribute_head cli_head = { };
829: void *data_ptr = NULL;
830:
831:
832: >>> TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));
833:
834: len = sizeof(*cli_ref) + cli_head.size;
835:
836:
837: if (attribute_is_hidden(&cli_head)) { 838: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 839: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 840: sizeof(cli_head.size)); 841: attr_type_invalid = 1; 842: continue; 843: }
844:
845:
846: if (pkcs11_attr_has_indirect_attributes(cli_head.id)) { 847: attr_type_invalid = 1; 848: continue; 849: }
850:
851:
852: if (!attribute_is_exportable(&cli_head, obj)) { 853: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 854: >>> TEE_MemMove(&cli_ref->size, &cli_head.size, 855: sizeof(cli_head.size)); 856: attr_sensitive = 1; 857: continue; 858: }
859:
860:
861: data_ptr = cli_head.size ? cli_ref->data : NULL;
862:
863: /*
864: * We assume that if size is 0, pValue was NULL, so we return
865: * the size of the required buffer for it (3., 4.)
866: */
867: rc = get_attribute(obj->attributes, cli_head.id, data_ptr,
868: &cli_head.size);
869:
870: switch (rc) { 871: case PKCS11_CKR_OK: 872: break; 873: case PKCS11_RV_NOT_FOUND: 874: cli_head.size = PKCS11_CK_UNAVAILABLE_INFORMATION; 875: attr_type_invalid = 1; 876: break; 877: case PKCS11_CKR_BUFFER_TOO_SMALL: 878: if (data_ptr) 879: buffer_too_small = 1; 880: break; 881: default: 882: rc = PKCS11_CKR_GENERAL_ERROR; 883: goto out; 884: }
885:
886: >>> TEE_MemMove(&cli_ref->size, &cli_head.size,
887: sizeof(cli_head.size));
888: }
889:
890: /*
891: * If case 1 applies to any of the requested attributes, then the call
892: * should return the value CKR_ATTRIBUTE_SENSITIVE. If case 2 applies to
893: * any of the requested attributes, then the call should return the
894: * value CKR_ATTRIBUTE_TYPE_INVALID. If case 5 applies to any of the
895: * requested attributes, then the call should return the value
896: * CKR_BUFFER_TOO_SMALL. As usual, if more than one of these error codes
897: * is applicable, Cryptoki may return any of them. Only if none of them
898: * applies to any of the requested attributes will CKR_OK be returned.
899: */
900:
901: rc = PKCS11_CKR_OK;
902: if (attr_sensitive)
903: rc = PKCS11_CKR_ATTRIBUTE_SENSITIVE;
904: if (attr_type_invalid)
905: rc = PKCS11_CKR_ATTRIBUTE_TYPE_INVALID;
906: if (buffer_too_small)
907: rc = PKCS11_CKR_BUFFER_TOO_SMALL;
908:
909:
910: >>> TEE_MemMove(out->memref.buffer, template, out->memref.size);
911:
912: DMSG("PKCS11 session %"PRIu32": get attributes %#"PRIx32,
913: session->handle, object_handle);
914:
915: out:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "cli_head",
      "cli_ref",
      "template",
      "out->memref.buffer",
      "obj_size",
      "head_new",
      "obj->attributes",
      "obj_handle"
    ],
    "propagation": [
      {
        "lhs": "cli_head",
        "rhs": "memory at cli_ref",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:832"
      },
      {
        "lhs": "cli_ref->size",
        "rhs": "cli_head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:839"
      },
      {
        "lhs": "cli_ref->size",
        "rhs": "cli_head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:854"
      },
      {
        "lhs": "cli_ref->size",
        "rhs": "cli_head.size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:886"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "template",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:910"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&obj_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966"
      },
      {
        "lhs": "head_new",
        "rhs": "obj->attributes",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209"
      },
      {
        "lhs": "out->memref.buffer",
        "rhs": "&obj_handle",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237"
      }
    ],
    "sanitizers": [],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 832,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: destination &cli_head (TA-private) is written from cli_ref which points into parsed template (origin from REE-controlled params -> template); origin ambiguity.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head),src_sz=unknown,dst_sz=sizeof(cli_head)"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_head, cli_ref, sizeof(cli_head));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 886,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: writes cli_head.size back into cli_ref->size within template (template may originate from REE data parsed earlier).",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->unknown",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(cli_head.size),src_sz=sizeof(cli_head.size),dst_sz=unknown"
        ]
      },
      "code_excerpt": "TEE_MemMove(&cli_ref->size, &cli_head.size, sizeof(cli_head.size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 910,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: copies TA-side 'template' into out->memref.buffer (REE-visible), potentially exposing attributes assembled in TA.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=out->memref.size,src_sz=template->attrs_size+sizeof(struct pkcs11_object_head),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, template, out->memref.size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: writes obj_size (TA-calculated) into out->memref.buffer (REE-visible) — REE-visible destination receives TA data.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: copies obj->attributes into head_new (allocation in TA) — src is TA object storage, dst is TA allocation; origin linkage to REE-controlled attributes earlier is possible.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template_size,src_sz=unknown,dst_sz=template_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding: writes obj_handle into out->memref.buffer (REE-visible) — returns TA handle to REE.",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [832, 839, 854, 886, 910]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [832, 839, 854, 886, 910] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      832,
      839,
      854,
      886,
      910
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 832,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies sizeof(cli_head) from cli_ref (within parsed template) without a verified src size at this program point; if remaining bytes in template < sizeof(cli_head) this causes an out-of-bounds read.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 839,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Writes cli_head.size into cli_ref->size inside template without proving the destination has room (template length checks happen elsewhere but not at this write), risking out-of-bounds write if template is truncated/malformed.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 854,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Writes cli_head.size into cli_ref->size (template) with no direct bounds proof at this site; malformed/short template can lead to OOB write.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 886,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies cli_head.size back into cli_ref->size after operations; if cli_ref is near template end and template->attrs_size is inconsistent this may write out-of-bounds.",
      "rule_id": "weak_input_validation"
    },
    {
      "line": 910,
      "function": "entry_get_attribute_value",
      "sink_function": "TEE_MemMove",
      "status": "vulnerable",
      "why": "Copies template into out->memref.buffer using out->memref.size with no check that out->memref.size <= actual template size, enabling out-of-bounds read of template or overwriting REE buffer area.",
      "rule_id": "weak_input_validation"
    }
  ],
  "vulnerability_decision": {
    "found": true
  },
  "vulnerability_details": {
    "vulnerability_type": "CWE-125",
    "severity": "medium",
    "taint_flow_summary": {
      "source": "REE-provided params -> parsed 'template' buffer",
      "propagation_path": [
        "params (REE) -> serialargs_alloc_get_attributes -> template (TA) : /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:767-779",
        "template contents read into cli_head via TEE_MemMove: object.c:832",
        "cli_head.size written back into template entries via TEE_MemMove: object.c:839/854/886",
        "template copied to out->memref.buffer via TEE_MemMove: object.c:910"
      ],
      "sink": "TEE_MemMove calls at lines [832,839,854,886,910] performing reads/writes based on unverified lengths"
    },
    "exploitation_analysis": {
      "preconditions": [
        "Attacker supplies malformed/short attribute template in REE params",
        "TA-side parsing trusts template->attrs_size or lacks per-copy bounds checks"
      ],
      "attack_scenario": "Malformed template causes TEE_MemMove to read/write beyond template bounds, leading to info leakage or memory corruption inside TA, potentially enabling crash or code execution depending on memory layout.",
      "impact": "Out-of-bounds read/write: information disclosure or TA memory corruption; may lead to denial-of-service or further exploitation."
    },
    "missing_mitigations": [
      {
        "type": "bounds_check",
        "location": "entry_get_attribute_value: around loop before TEE_MemMove at line 832",
        "recommendation": "Ensure (end - cur) >= sizeof(cli_head) before copying; validate len and each per-field access against template->attrs_size."
      },
      {
        "type": "bounds_check",
        "location": "entry_get_attribute_value: before TEE_MemMove at line 910",
        "recommendation": "Use min(out->memref.size, actual_template_size) or return BUFFER_TOO_SMALL instead of copying more than template size."
      },
      {
        "type": "type_validation",
        "location": "serialargs_alloc_get_attributes: after allocation",
        "recommendation": "Sanitize and canonicalize parsed template lengths and ensure allocations match declared sizes."
      }
    ],
    "confidence_factors": {
      "positive_indicators": [
        "TEE_MemMove calls use sizes derived from external/template fields without explicit per-copy verified remaining-bytes checks at call sites",
        "Loop uses cur<end but sizeof(cli_head) is read before len computed, leaving a gap"
      ],
      "negative_indicators": [
        "There is an earlier check serialargs_remaining_bytes(&ctrlargs) and template is allocated via serialargs_alloc_get_attributes which may validate sizes (not fully visible here)",
        "Some sanity checks and access control exist elsewhere (e.g., check_access_attrs_against_token)"
      ],
      "confidence_level": "medium"
    },
    "decision_rationale": "Memory-safety issues take precedence: several TEE_MemMove usages perform fixed-size copies into/from buffers whose remaining size at that exact program point is not proven, creating out-of-bounds read/write risks.",
    "vulnerable_line_count": 5,
    "vulnerable_lines": [
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
        "line": 832,
        "function": "entry_get_attribute_value",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Reads sizeof(cli_head) from cli_ref without ensuring remaining src bytes >= sizeof(cli_head)."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
        "line": 839,
        "function": "entry_get_attribute_value",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Writes cli_head.size into cli_ref->size inside template without proving dst has space."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
        "line": 854,
        "function": "entry_get_attribute_value",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Writes cli_head.size into cli_ref->size inside template without proving dst has space."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
        "line": 886,
        "function": "entry_get_attribute_value",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies cli_head.size back into template slot; template bounds at this point are not re-checked."
      },
      {
        "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
        "line": 910,
        "function": "entry_get_attribute_value",
        "sink_function": "TEE_MemMove",
        "rule_id": "weak_input_validation",
        "why": "Copies template into out->memref.buffer using out->memref.size without ensuring out->memref.size <= template actual size."
      }
    ]
  },
  "why_no_vulnerability": "",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_get_attribute_value:745-765",
      "evidence": "ptypes == exp_pt check"
    },
    {
      "type": "bounds_check",
      "location": "entry_get_attribute_value:781-784",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) validated earlier"
    },
    {
      "type": "access_control",
      "location": "entry_get_attribute_value:792-796",
      "evidence": "check_access_attrs_against_token(...) enforced"
    }
  ],
  "argument_safety": [
    {
      "arg": "params (ctrl/out memrefs)",
      "why_safe": "param types validated (ptypes == exp_pt) and serialargs initial checks performed",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:745-765,767-779"
    }
  ],
  "residual_risks": [
    "line 910: possible information disclosure (unencrypted_output) if template contains sensitive values that bypass attribute_is_exportable protections — memory-safety classification preserved priority over disclosure",
    "template parsing/allocation assumptions upstream may mitigate some OOB scenarios but are not guaranteed at each copy site"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Direct fixed-size memcpy-like operations using data derived from parsed template/params",
      "Lack of explicit per-copy remaining-bytes checks at the exact call sites"
    ],
    "negative_indicators": [
      "Existence of earlier serialargs_remaining_bytes check and attribute exportability checks which may limit exploitation"
    ],
    "confidence_level": "medium"
  },
  "decision_rationale": "Memory-safety issues (out-of-bounds reads/writes) were observed at the TEE_MemMove call sites because copy lengths are not proven against remaining buffer lengths at those exact points; these issues take precedence over disclosure classifications.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 823,
      "function": "entry_get_attribute_value",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template->attrs_size,src_sz=ctrl->memref.size,dst_sz=template->attrs_size"
        ]
      },
      "why": "Construction of 'template' from REE-controlled serialargs; any inconsistency in declared attrs_size vs actual data can make subsequent TEE_MemMove calls unsafe.",
      "code_excerpt": "cur = (char *)template + sizeof(struct pkcs11_object_head); end = cur + template->attrs_size;"
    }
  ]
}
フロー #235: TA_InvokeCommandEntryPoint -> entry_get_object_size -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_get_object_sizeTEE_MemMove

実行時間: 61.31秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966

パラメータインデックス: 0

解析結果

安全判定理由: A bounds/size check (out->memref.size == sizeof(uint32_t)) prevents overflow and the copied value is not classified as sensitive, so no unencrypted secret leakage is indicated.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_get_object_size at lines [966, 1209, 1237]:
-- Call #1 at line 966 --
964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size +
965: sizeof(struct obj_attrs);
966: >>> TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));
967:
968: return PKCS11_CKR_OK;
-- Call #2 at line 1209 --
1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
-- Call #3 at line 1237 --
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at line 966:
961: if (out->memref.size != sizeof(uint32_t))
962: return PKCS11_CKR_ARGUMENTS_BAD;
963:
964: obj_size = ((struct obj_attrs *)obj->attributes)->attrs_size +
965: sizeof(struct obj_attrs);
966: >>> TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));
967:
968: return PKCS11_CKR_OK;
969: }
970:
971: enum pkcs11_rc entry_set_attribute_value(struct pkcs11_client *client,

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "out->memref.buffer",
      "&obj_size",
      "head_new",
      "obj->attributes",
      "template_size",
      "&obj_handle",
      "sizeof(obj_handle)"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "out->memref.buffer (caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966"
      },
      {
        "lhs": "src",
        "rhs": "&obj_size (local TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(obj_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:966"
      },
      {
        "lhs": "dest",
        "rhs": "head_new (caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209"
      },
      {
        "lhs": "src",
        "rhs": "obj->attributes (caller/obj)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209"
      },
      {
        "lhs": "len",
        "rhs": "template_size",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209"
      },
      {
        "lhs": "dest",
        "rhs": "out->memref.buffer (caller)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237"
      },
      {
        "lhs": "src",
        "rhs": "&obj_handle (local TA-private)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237"
      },
      {
        "lhs": "len",
        "rhs": "sizeof(obj_handle)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237"
      }
    ],
    "sanitizers": [
      {
        "kind": "size_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:961-962",
        "evidence": "out->memref.size == sizeof(uint32_t) checked prior to first call"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee dest to out->memref.buffer which is caller-provided REE-visible memref",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee src to &obj_size (TA-local value) passed as source",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 966,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee len to sizeof(obj_size) immediate value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_size),src_sz=sizeof(obj_size),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_size, sizeof(obj_size));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee dest to head_new (allocator-returned buffer) origin unclear",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee src to obj->attributes (object-owned attributes, TA-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:unknown",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee len to template_size (caller-provided size)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:unknown",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee dest to out->memref.buffer which is caller-provided REE-visible memref",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:REE->TA",
          "src_region:REE-visible",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=unknown,src_sz=unknown,dst_sz=unknown"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee src to &obj_handle (TA-local handle) passed as source",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Binding callee len to sizeof(obj_handle) immediate value",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "call-site: TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [966]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [966] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      966
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 966,
      "function": "entry_get_object_size",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Destination is caller-provided REE-visible memref but a size check (out->memref.size == sizeof(uint32_t)) ensures copy length matches sizeof(obj_size); obj_size is TA-local non-sensitive.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "A bounds/size check (out->memref.size == sizeof(uint32_t)) prevents overflow and the copied value is not classified as sensitive, so no unencrypted secret leakage is indicated.",
  "effective_sanitizers": [
    {
      "type": "size_check",
      "location": "entry_get_object_size:961-962",
      "evidence": "out->memref.size == sizeof(uint32_t)"
    },
    {
      "type": "access_check",
      "location": "entry_get_object_size:957-959",
      "evidence": "check_access_attrs_against_token return checked"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.size",
      "why_safe": "ensures destination buffer length equals sizeof(uint32_t)",
      "evidence": "object.c:961-962"
    },
    {
      "arg": "obj_size (source)",
      "why_safe": "TA-local computed integer, size known (sizeof uint32_t) and small",
      "evidence": "object.c:964-966"
    }
  ],
  "residual_risks": [],
  "confidence_factors": {
    "positive_indicators": [
      "explicit size equality check immediately before TEE_MemMove",
      "source is TA-local scalar (obj_size) not named/used as secret"
    ],
    "negative_indicators": [
      "destination buffer is REE-visible (shared) so any sensitive write would be exposure if misclassified"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety sanitizer enforces exact size and there is no indication obj_size is secret, so the copy does not constitute a vulnerability under the given promotion rules.",
  "structural_risks": []
}
フロー #236: TA_InvokeCommandEntryPoint -> entry_copy_object -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_copy_objectTEE_MemMove

実行時間: 44.17秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209, 1237

パラメータインデックス: 0

解析結果

安全判定理由: 1209 copies between TA-private regions; 1237 copies a non-sensitive handle to REE with prior size/type validation.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from entry_copy_object at lines [1209, 1237]:
-- Call #1 at line 1209 --
1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
-- Call #2 at line 1237 --
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c

// Call at lines [1209, 1237]:
1204: if (!head_new) { 1205: rc = PKCS11_CKR_DEVICE_MEMORY; 1206: goto out; 1207: }
1208:
1209: >>> TEE_MemMove(head_new, obj->attributes, template_size);
1210:
1211: /*
1212: * Modify the copied attribute @head_new based on the template @head
1213: * given by the callee
1214: */
1215: rc = modify_attributes_list(&head_new, head);
1216: if (rc)
1217: goto out;
1218:
1219: /*
1220: * At this stage the object is almost created: all its attributes are
1221: * referenced in @head_new, including the key value and are assumed
1222: * reliable. Now need to register it and get a handle for it.
1223: */
1224: rc = create_object(session, head_new, &obj_handle);
1225: if (rc)
1226: goto out;
1227:
1228: /*
1229: * Now obj_handle (through the related struct pkcs11_object
1230: * instance) owns the serialized buffer that holds the object
1231: * attributes. We clear reference in head to NULL as the serializer
1232: * object is now referred from obj_handle. This allows smooth pass
1233: * through free at function exit.
1234: */
1235: head_new = NULL;
1236:
1237: >>> TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));
1238: out->memref.size = sizeof(obj_handle);
1239:
1240: DMSG("PKCS11 session %"PRIu32": copy object %#"PRIx32,
1241: session->handle, obj_handle);
1242:

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "head_new",
      "obj->attributes",
      "out->memref.buffer",
      "&obj_handle",
      "template_size",
      "sizeof(obj_handle)"
    ],
    "propagation": [
      {
        "lhs": "head_new",
        "rhs": "TEE_Malloc(...) then destination of TEE_MemMove(head_new, obj->attributes, template_size)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1202-1209"
      },
      {
        "lhs": "head_new (contents)",
        "rhs": "obj->attributes (source) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1209"
      },
      {
        "lhs": "out->memref.buffer (contents)",
        "rhs": "&obj_handle (local) copied via TEE_MemMove",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1237"
      }
    ],
    "sanitizers": [
      {
        "kind": "type_validation",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1104-1106",
        "evidence": "checks ptypes == expected_pt and out->memref.size == sizeof(obj_handle)"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'head_new' is TA-allocated (TEE-private) receiving data from TA-private obj->attributes via TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE-private",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=template_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1209,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source 'obj->attributes' is TA-private buffer passed into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TEE-private->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:private",
          "size_triplet:copy_len=template_size,src_sz=template_size,dst_sz=template_size"
        ]
      },
      "code_excerpt": "TEE_MemMove(head_new, obj->attributes, template_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: destination 'out->memref.buffer' aliases caller-provided REE-visible buffer passed as params[2].memref.buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c",
      "line": 1237,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "Call-site binding: source '&obj_handle' is TA-local value copied into caller's REE-visible buffer",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(obj_handle),src_sz=sizeof(obj_handle),dst_sz=out->memref.size"
        ]
      },
      "code_excerpt": "TEE_MemMove(out->memref.buffer, &obj_handle, sizeof(obj_handle));"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [1209, 1237]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [1209, 1237] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      1209,
      1237
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 1209,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies TA-private obj->attributes into TA-allocated head_new (both TEE-private); no REE-visible destination and size derived from TA-private template_size.",
      "rule_id": "other"
    },
    {
      "line": 1237,
      "function": "entry_copy_object",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "Copies local obj_handle into caller-provided out->memref.buffer, but out->memref.size was validated earlier (ptypes check) and obj_handle is non-sensitive/public.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "1209 copies between TA-private regions; 1237 copies a non-sensitive handle to REE with prior size/type validation.",
  "effective_sanitizers": [
    {
      "type": "type_validation",
      "location": "entry_copy_object:1104-1106",
      "evidence": "checks ptypes == expected_pt and out->memref.size == sizeof(obj_handle)"
    },
    {
      "type": "bounds_check",
      "location": "entry_copy_object:1122-1125",
      "evidence": "serialargs_remaining_bytes(&ctrlargs) -> error if leftover bytes"
    }
  ],
  "argument_safety": [
    {
      "arg": "out->memref.buffer",
      "why_safe": "size/type validated against expected before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1104-1106"
    },
    {
      "arg": "head_new",
      "why_safe": "allocated with TEE_Malloc and sized to template_size before copy",
      "evidence": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/object.c:1202-1204"
    }
  ],
  "residual_risks": [
    "None"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "explicit ptypes and out->memref.size checks before copying obj_handle",
      "sources for template_size and obj->attributes are TA-private"
    ],
    "negative_indicators": [
      "origin of client/params is REE-visible at call site (but not used as source for these two copies)",
      "some propagated buffers originated from REE earlier in call chain (structural), though not copied here"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Both TEE_MemMove calls either move TA-private data internally or move a non-sensitive handle to REE after explicit size/type validation, so they do not constitute an unencrypted sensitive leak nor a bounds-vulnerable sink here.",
  "structural_risks": []
}
フロー #237: TA_InvokeCommandEntryPoint -> entry_generate_key_pair -> generate_ec_keys -> tee2pkcs_ec_attributes -> TEE_MemMove
安全
TA_InvokeCommandEntryPointentry_generate_key_pairgenerate_ec_keystee2pkcs_ec_attributesTEE_MemMove

実行時間: 82.17秒

ターゲットシンク情報

シンク関数: TEE_MemMove

場所: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:559, 564

パラメータインデックス: 0

解析結果

安全判定理由: Bounds checks on x_size/y_size and allocation of ecpoint prevent memory-safety issues; the copied data are TEE-private public coordinates, not REE-visible secrets.

詳細: Taint analysis did not reveal exploitable path to dangerous sink

LLM対話履歴 (4 メッセージ)

関数: TEE_MemMove
プロンプト 中間 (TEE_MemMove)
You are a deterministic taint analyst for OP‑TEE TAs. Analyze the user‑defined function “TEE_MemMove” at a middle hop (MIDDLE). Respect the upstream context but do NOT copy it verbatim.

=== UPSTREAM TAINT CONTEXT (READ‑ONLY) ===
CODE (with call context)
=== CALL CONTEXT ===
Called from tee2pkcs_ec_attributes at lines [559, 564, 839]:
-- Call #1 at line 559 --
557: if (x_size < psize)
558: poffset = psize - x_size;
559: >>> TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);
560:
561: poffset = 0;
-- Call #2 at line 564 --
562: if (y_size < psize)
563: poffset = psize - y_size;
564: >>> TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);
565:
566: /*
-- Call #3 at line 839 --
837: ctx->ctx_len = ctx_len;
838: ctx->flag = flag;
839: >>> TEE_MemMove(ctx->ctx, ctx_data, ctx_len);
840:
841: return PKCS11_CKR_OK;

file: /workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c

// Call at lines [559, 564]:
554: }
555:
556: poffset = 0;
557: if (x_size < psize)
558: poffset = psize - x_size;
559: >>> TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);
560:
561: poffset = 0;
562: if (y_size < psize)
563: poffset = psize - y_size;
564: >>> TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);
565:
566: /*
567: * Add PKCS11_CKA_OPTEE_HIDDEN_EC_POINT to private key object and
568: * standard PKCS11_CKA_EC_POINT to public key objects as
569: * TEE_PopulateTransientObject requires public x/y values

DOMAIN FACTS (soft defaults; same as START)
- REE‑originated values are tainted. Enumerate propagation as “LHS <- RHS @ file:line”. Record sanitizers with real code lines.
- Surface structure‑driven risks even without a sink call (tainted indices/lengths, pointer/offset arithmetic, per‑byte copies, param_types vs access mismatch).
- When uncertain, avoid forced conclusions; use "unknown" and/or structural risks.

[MANDATORY — CALL‑SITE BINDING FACTS]
- For each pointer argument at this call-site, emit one structural_risk (sink_function "=") that binds the callee parameter to its origin region (REE-visible / TEE-private / unknown). Include the 5 tags and a one‑line why (e.g., "alias of shared buffer passed into helper"). Do this even if "obvious".

CLASSIFICATION (rules)
- Use only host‑provided rule identifiers; otherwise "other".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose/no fences. Never omit required keys. Use [] / "unknown" / 0 per schema.
- Ensure every structural risk has rule_matches.others with the 5 tags in the exact order: flow_dir:..., src_region:..., dst_region:..., sensitivity_label:..., size_triplet:....

ALLOWED VALUES (sink_function in structural risks)
- "=", "array_write", "<exact callee name>" (e.g., "TEE_MemMove"), or "unknown". NEVER "external_fn".

SCHEMA (MIDDLE, single JSON)
{ "phase": "middle", "taint_analysis": { "function": "TEE_MemMove", "tainted_vars": ["<var>", ...], "propagation": [ {"lhs":"<LHS>","rhs":"<RHS expr>","site":"<path>:<line>"} ], "sanitizers": [ {"kind":"<bounds_check|type_validation|...>","site":"<path>:<line>","evidence":"<short>"} ], "taint_blocked": false }, "structural_risks": [ { "file":"<path|unknown>", "line":<int|0>, "function":"TEE_MemMove", "rule":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑line reason>", "sink_function":"<'='|'array_write'|<callee>|'unknown'>", "rule_matches":{"rule_id":["<one or more>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 中間 (TEE_MemMove)
{
  "phase": "middle",
  "taint_analysis": {
    "function": "TEE_MemMove",
    "tainted_vars": [
      "dest",
      "src",
      "len",
      "ecpoint",
      "x_ptr",
      "x_size",
      "y_ptr",
      "y_size",
      "ctx->ctx",
      "ctx_data",
      "ctx_len"
    ],
    "propagation": [
      {
        "lhs": "dest",
        "rhs": "ecpoint + hsize + poffset (allocated via TEE_Malloc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:559"
      },
      {
        "lhs": "src",
        "rhs": "x_ptr (from alloc_get_tee_attribute_data)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:559"
      },
      {
        "lhs": "len",
        "rhs": "x_size (attribute length)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:559"
      },
      {
        "lhs": "dest",
        "rhs": "ecpoint + hsize + psize + poffset (allocated via TEE_Malloc)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:564"
      },
      {
        "lhs": "src",
        "rhs": "y_ptr (from alloc_get_tee_attribute_data)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:564"
      },
      {
        "lhs": "len",
        "rhs": "y_size (attribute length)",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:564"
      },
      {
        "lhs": "dest",
        "rhs": "ctx->ctx",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:839"
      },
      {
        "lhs": "src",
        "rhs": "ctx_data",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:839"
      },
      {
        "lhs": "len",
        "rhs": "ctx_len",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:839"
      }
    ],
    "sanitizers": [
      {
        "kind": "bounds_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:512-516",
        "evidence": "checks x_size and y_size <= psize before copies"
      },
      {
        "kind": "allocation_check",
        "site": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c:533-537",
        "evidence": "checks TEE_Malloc(ecpoint) result and errors on NULL"
      }
    ],
    "taint_blocked": false
  },
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 559,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination pointer is an ecpoint buffer allocated via TEE_Malloc (TEE-private) passed as dest",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=x_size,src_sz=x_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 559,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source pointer x_ptr originates from alloc_get_tee_attribute_data (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=x_size,src_sz=x_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 559,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: length argument x_size (attribute length) drives copy size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=x_size,src_sz=x_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + poffset, x_ptr, x_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 564,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination pointer is ecpoint buffer (TEE-private) passed as dest for y coordinate",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=y_size,src_sz=y_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 564,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source pointer y_ptr originates from alloc_get_tee_attribute_data (TEE-private)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=y_size,src_sz=y_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 564,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: length argument y_size (attribute length) drives copy size",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=y_size,src_sz=y_size,dst_sz=dersize"
        ]
      },
      "code_excerpt": "TEE_MemMove(ecpoint + hsize + psize + poffset, y_ptr, y_size);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 839,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: destination ctx->ctx passed as dest (likely TEE-private buffer) into TEE_MemMove",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctx_len,src_sz=unknown,dst_sz=ctx->ctx_len"
        ]
      },
      "code_excerpt": "TEE_MemMove(ctx->ctx, ctx_data, ctx_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 839,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: source ctx_data passed into TEE_MemMove; provenance unclear (could be REE-derived)",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctx_len,src_sz=unknown,dst_sz=ctx->ctx_len"
        ]
      },
      "code_excerpt": "TEE_MemMove(ctx->ctx, ctx_data, ctx_len);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 839,
      "function": "TEE_MemMove",
      "rule": "other",
      "why": "binding: length ctx_len drives copy size into ctx->ctx",
      "sink_function": "=",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:unknown",
          "src_region:unknown",
          "dst_region:TEE-private",
          "sensitivity_label:unknown",
          "size_triplet:copy_len=ctx_len,src_sz=unknown,dst_sz=ctx->ctx_len"
        ]
      },
      "code_excerpt": "TEE_MemMove(ctx->ctx, ctx_data, ctx_len);"
    }
  ]
}

関数: final_decision
プロンプト 終了 最終 (final_decision)
You are a deterministic taint analyst for OP‑TEE TAs. Produce the final decision (END) for the whole chain using all prior START/MIDDLE results (propagation, sanitizers, structural risks). Evaluate each target sink line INDEPENDENTLY.

TARGET SINK INFO (host‑provided)
- sink_function: TEE_MemMove
- target_sink_lines: [559, 564]
Consider ONLY these lines as external sink calls for line‑level evaluation. Structure‑driven issues without an external sink call on the same line must be reported under structural_risks.

DEFAULT POLICY HINTS (soft, not absolute)
- A line is vulnerable iff (tainted → dangerous sink at that line) AND (sanitization up to that program point is insufficient).
- Alloc/free are NOT sinks. Random bytes are NON‑sensitive by default, unless context indicates secrecy. Crypto APIs alone are not sinks for “unencrypted_output”; if plaintext is later copied into REE, evaluate that later line.
- When uncertain, do not force “vulnerable” or “safe”; (a) explain briefly, (b) prefer listing a structural risk or using "not_applicable", and (c) capture residual risks where useful.
- MEMREF_OUTPUT alone is NOT a reason to report “unencrypted_output”.

PROMOTION & CLASSIFICATION RULES (apply deterministically; fix the order)
Priority of classification:
1) **Memory‑safety** (size/length/array bounds violations) takes precedence over
2) **Information disclosure** (unencrypted/plaintext copy to REE).

- Promote to "unencrypted_output" ONLY IF ALL hold:
(a) dst_region == "REE-visible", AND
(b) `sensitivity_label ∈ {secret,key,credential,private}` OR upstream evidence shows a TA‑private secret reaching REE, AND
(c) no effective sanitizer up to that point.
Otherwise, keep it in structural_risks (do not promote solely because dest is MEMREF_OUTPUT).

- If size_triplet implies copy_len > min(src_sz, dst_sz) OR a fixed-size array write with tainted bound/index and no bounds check:
- ADD it to vulnerable_lines with sink_function: "array_write" (for loop/array writes) or the real callee,
- Map to an appropriate CWE (e.g., CWE‑125/126 for over‑read, CWE‑120/121/122 for overflow),
- Set rule_id to a suitable host rule (e.g., "weak_input_validation") or "other" if none fits.

CONFIDENCE CALIBRATION
- high: direct size/bounds violation or unequivocal secret→REE copy with evidence tags.
- medium: partial evidence (one region unknown) but consistent with promotion rules.
- low: policy‑negative indicators (random/public data, MEMREF_OUTPUT alone, unclear direction).

CLASSIFICATION (rules)
- Use only host-provided rule identifiers; otherwise "other". Do not invent new rule names.

[RESIDUAL RISKS — REQUIRED]
- If the priority rule (memory‑safety first) suppresses another plausible class on the same line (e.g., unencrypted_output), add a short item to residual_risks with the line number and one‑line why.

ALLOWED VALUES for sink_function (everywhere in this step):
- "<exact callee name>" (e.g., "TEE_MemMove"), "=" (simple assignment), "array_write", or "unknown".
- NEVER emit the placeholder string "external_fn".

OUTPUT (STRICT)
- Emit exactly ONE JSON object. No prose. No code fences. Never omit required keys. Use empty arrays or "unknown" where needed.
- For each target sink line, ensure:
(1) sink_function is set by the decision table (callee|array_write|"="),
(2) If promoted to "unencrypted_output", all three conditions (dst_region==REE-visible, sensitive label/evidence, no sanitizer) are satisfied and referenced in why,
(3) structural_risks key is always present (empty array allowed).

ALLOWED ENUMS
- evaluated_sink_lines[*].status: "vulnerable" | "safe" | "not_applicable"
- severity: "low" | "medium" | "high" | "critical"
- confidence_level: "low" | "medium" | "high"

SCHEMA (END, single JSON)
{ "phase": "end", "sink_targets": { "function": "{sink_function|unknown}", "lines": [559, 564] }, "evaluated_sink_lines": [ { "line": <int|0>, "function": "<enclosing_fn|unknown>", "sink_function": "<callee|'='|'array_write'|unknown>", "status": "vulnerable|safe|not_applicable", "why": "<one‑sentence, line‑specific>", "rule_id": "<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>" } // one object per target sink line ], "vulnerability_decision": { "found": true|false }, // Required when found=true "vulnerability_details": { "vulnerability_type": "CWE‑XXX", "severity": "low|medium|high|critical", "taint_flow_summary": { "source": "<brief>", "propagation_path": ["A -> B @ <file>:<line>", "..."], "sink": "<brief>" }, "exploitation_analysis": { "preconditions": ["..."], "attack_scenario": "<short>", "impact": "<short>" }, "missing_mitigations": [ {"type":"bounds_check|type_validation|access_control|encryption|range_check|mem_access_check", "location":"function:line|unknown", "recommendation":"<specific>"} ], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this IS a vulnerability>", "vulnerable_line_count": <int>, "vulnerable_lines": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<fn|unknown>", "sink_function":"<callee|'='|'array_write'|unknown>", "rule_id":"<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>", "why":"<one‑sentence, line‑specific>" } // multiple allowed ] }, // Suggested when found=false "why_no_vulnerability": "<one‑sentence>", "effective_sanitizers": [ {"type":"bounds_check|type_validation|access_control|range_check|mem_access_check", "location":"function:line|unknown", "evidence":"<short excerpt>"} ], "argument_safety": [ {"arg":"<name or param ref>", "why_safe":"<brief>", "evidence":"file:line|unknown"} ], "residual_risks": ["<edge case or empty>"], "confidence_factors": { "positive_indicators": ["..."], "negative_indicators": ["..."], "confidence_level": "low|medium|high" }, "decision_rationale": "<why this ISN'T a vulnerability>", // Structure‑driven issues that did NOT reach an external sink on that same line. "structural_risks": [ { "file":"<path>|unknown", "line":<int>|0, "function":"<current_or_related_fn>", "sink_function":"<'='|array_write|unknown>", "rule_matches":{"rule_id":["<unencrypted_output|weak_input_validation|shared_memory_overwrite|other>"],"others":["<flow_dir:...>","<src_region:...>","<dst_region:...>","<sensitivity_label:...>","<size_triplet:...>"]}, "why":"<one‑line reason>", "code_excerpt":"<short optional>" } // zero or more ] }
LLM応答 終了 最終 (final_decision)
{
  "phase": "end",
  "sink_targets": {
    "function": "TEE_MemMove",
    "lines": [
      559,
      564
    ]
  },
  "evaluated_sink_lines": [
    {
      "line": 559,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "x_size is checked against computed psize (512-516) and ecpoint is allocated to dersize (533) so the copy is bounds-checked; src and dst are TEE-private and data are public (EC coord).",
      "rule_id": "other"
    },
    {
      "line": 564,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "TEE_MemMove",
      "status": "safe",
      "why": "y_size is validated against psize (512-516) and ecpoint buffer sized accordingly (533), preventing overflow; src/dst are TEE-private and coordinate is public.",
      "rule_id": "other"
    }
  ],
  "vulnerability_decision": {
    "found": false
  },
  "why_no_vulnerability": "Bounds checks on x_size/y_size and allocation of ecpoint prevent memory-safety issues; the copied data are TEE-private public coordinates, not REE-visible secrets.",
  "effective_sanitizers": [
    {
      "type": "bounds_check",
      "location": "tee2pkcs_ec_attributes:512-516",
      "evidence": "if (x_size > psize || y_size > psize) return PKCS11_CKR_ARGUMENTS_BAD;"
    },
    {
      "type": "allocation_check",
      "location": "tee2pkcs_ec_attributes:533-537",
      "evidence": "ecpoint = TEE_Malloc(dersize, ...); if (!ecpoint) return PKCS11_CKR_DEVICE_MEMORY;"
    }
  ],
  "argument_safety": [
    {
      "arg": "x_size / y_size",
      "why_safe": "validated against derived psize before use in copy",
      "evidence": "processing_ec.c:512-516"
    },
    {
      "arg": "ecpoint",
      "why_safe": "allocated to dersize matching expected copy region",
      "evidence": "processing_ec.c:533-537"
    }
  ],
  "residual_risks": [
    "Construction of ecpoint is later added to priv_head/pub_head (lines 572-578); handling/storing of derived attributes may expose secret material elsewhere if later copied to REE without checks"
  ],
  "confidence_factors": {
    "positive_indicators": [
      "Explicit bounds check on x_size/y_size against psize",
      "Allocation of ecpoint sized from psize-derived qsize/dersize",
      "Copies occur between TEE-private buffers"
    ],
    "negative_indicators": [
      "psize/tee_size derived from EC params (a_ptr) which originates from REE; if ec_params2tee_keysize is buggy it could produce unexpected sizes",
      "Downstream add_attribute stores ecpoint into structures that may later be exported"
    ],
    "confidence_level": "high"
  },
  "decision_rationale": "Memory-safety checks prevent overflow at the two target TEE_MemMove calls and the data copied are TEE-private public coordinates; thus neither line is vulnerable under the evaluated rules, though downstream attribute handling remains a structural risk.",
  "structural_risks": [
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 572,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TEE",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:secret",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=priv_head->attrs_size+sizeof(*priv_head)"
        ]
      },
      "why": "Adds constructed ecpoint into priv_head (hidden EC_POINT) which may contain secret material and could later be persisted or exported without proper protection.",
      "code_excerpt": "rc = add_attribute(priv_head, PKCS11_CKA_OPTEE_HIDDEN_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing_ec.c",
      "line": 577,
      "function": "tee2pkcs_ec_attributes",
      "sink_function": "unknown",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->TA",
          "src_region:TEE-private",
          "dst_region:TEE-private",
          "sensitivity_label:public",
          "size_triplet:copy_len=dersize,src_sz=dersize,dst_sz=pub_head->attrs_size+sizeof(*pub_head)"
        ]
      },
      "why": "Adds EC_POINT into pub_head (public attribute) from ecpoint buffer; structural copy of constructed DER point into attribute list.",
      "code_excerpt": "rc = add_attribute(pub_head, PKCS11_CKA_EC_POINT, ecpoint, dersize);"
    },
    {
      "file": "/workspace/benchmark/vuln-ta-collection/optee-pkcs11-cve/ta/processing.c",
      "line": 553,
      "function": "entry_generate_key_pair",
      "sink_function": "TEE_MemMove",
      "rule_matches": {
        "rule_id": [
          "other"
        ],
        "others": [
          "flow_dir:TA->REE",
          "src_region:TEE-private",
          "dst_region:REE-visible",
          "sensitivity_label:public",
          "size_triplet:copy_len=sizeof(pubkey_handle),src_sz=sizeof(pubkey_handle),dst_sz=out->memref.size"
        ]
      },
      "why": "Copies generated key handles into caller-provided out->memref.buffer (REE-visible); while handles are non-sensitive, this is an alias of shared buffer passed from REE.",
      "code_excerpt": "TEE_MemMove(hdl_ptr, &pubkey_handle, sizeof(pubkey_handle));"
    }
  ]
}